summaryrefslogtreecommitdiffstats
path: root/arch
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2021-02-21 13:40:06 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2021-02-21 13:40:06 -0800
commitdf24212a493afda0d4de42176bea10d45825e9a0 (patch)
tree72d191a100a849cf3d030e6409c52429d8537131 /arch
parent3e10585335b7967326ca7b4118cada0d2d00a2ab (diff)
parent2223318c2862edc7f5b282939b850b19fc934ec4 (diff)
Merge tag 's390-5.12-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
Pull s390 updates from Vasily Gorbik: - Convert to using the generic entry infrastructure. - Add vdso time namespace support. - Switch s390 and alpha to 64-bit ino_t. As discussed at https://lore.kernel.org/linux-mm/YCV7QiyoweJwvN+m@osiris/ - Get rid of expensive stck (store clock) usages where possible. Utilize cpu alternatives to patch stckf when supported. - Make tod_clock usage less error prone by converting it to a union and rework code which is using it. - Machine check handler fixes and cleanups. - Drop couple of minor inline asm optimizations to fix clang build. - Default configs changes notably to make libvirt happy. - Various changes to rework and improve qdio code. - Other small various fixes and improvements all over the code. * tag 's390-5.12-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (68 commits) s390/qdio: remove 'merge_pending' mechanism s390/qdio: improve handling of PENDING buffers for QEBSM devices s390/qdio: rework q->qdio_error indication s390/qdio: inline qdio_kick_handler() s390/time: remove get_tod_clock_ext() s390/crypto: use store_tod_clock_ext() s390/hypfs: use store_tod_clock_ext() s390/debug: use union tod_clock s390/kvm: use union tod_clock s390/vdso: use union tod_clock s390/time: convert tod_clock_base to union s390/time: introduce new store_tod_clock_ext() s390/time: rename store_tod_clock_ext() and use union tod_clock s390/time: introduce union tod_clock s390,alpha: switch to 64-bit ino_t s390: split cleanup_sie s390: use r13 in cleanup_sie as temp register s390: fix kernel asce loading when sie is interrupted s390: add stack for machine check handler s390: use WRITE_ONCE when re-allocating async stack ...
Diffstat (limited to 'arch')
-rw-r--r--arch/Kconfig4
-rw-r--r--arch/alpha/Kconfig1
-rw-r--r--arch/s390/Kconfig3
-rw-r--r--arch/s390/Kconfig.debug10
-rw-r--r--arch/s390/configs/debug_defconfig12
-rw-r--r--arch/s390/configs/defconfig9
-rw-r--r--arch/s390/configs/zfcpdump_defconfig2
-rw-r--r--arch/s390/crypto/paes_s390.c28
-rw-r--r--arch/s390/crypto/prng.c2
-rw-r--r--arch/s390/hypfs/hypfs_diag0c.c2
-rw-r--r--arch/s390/hypfs/hypfs_vm.c4
-rw-r--r--arch/s390/include/asm/alternative.h16
-rw-r--r--arch/s390/include/asm/ap.h2
-rw-r--r--arch/s390/include/asm/atomic.h20
-rw-r--r--arch/s390/include/asm/bitops.h36
-rw-r--r--arch/s390/include/asm/cputime.h2
-rw-r--r--arch/s390/include/asm/elf.h7
-rw-r--r--arch/s390/include/asm/entry-common.h60
-rw-r--r--arch/s390/include/asm/fpu/api.h2
-rw-r--r--arch/s390/include/asm/idle.h4
-rw-r--r--arch/s390/include/asm/lowcore.h17
-rw-r--r--arch/s390/include/asm/nmi.h1
-rw-r--r--arch/s390/include/asm/pci.h4
-rw-r--r--arch/s390/include/asm/preempt.h4
-rw-r--r--arch/s390/include/asm/processor.h50
-rw-r--r--arch/s390/include/asm/ptrace.h9
-rw-r--r--arch/s390/include/asm/qdio.h7
-rw-r--r--arch/s390/include/asm/scsw.h3
-rw-r--r--arch/s390/include/asm/syscall.h11
-rw-r--r--arch/s390/include/asm/syscall_wrapper.h128
-rw-r--r--arch/s390/include/asm/thread_info.h5
-rw-r--r--arch/s390/include/asm/timex.h48
-rw-r--r--arch/s390/include/asm/tlb.h5
-rw-r--r--arch/s390/include/asm/uaccess.h2
-rw-r--r--arch/s390/include/asm/vdso.h7
-rw-r--r--arch/s390/include/asm/vdso/gettimeofday.h12
-rw-r--r--arch/s390/include/asm/vtime.h14
-rw-r--r--arch/s390/include/uapi/asm/ptrace.h5
-rw-r--r--arch/s390/kernel/Makefile2
-rw-r--r--arch/s390/kernel/asm-offsets.c20
-rw-r--r--arch/s390/kernel/compat_signal.c1
-rw-r--r--arch/s390/kernel/debug.c6
-rw-r--r--arch/s390/kernel/early.c12
-rw-r--r--arch/s390/kernel/entry.S872
-rw-r--r--arch/s390/kernel/entry.h12
-rw-r--r--arch/s390/kernel/fpu.c88
-rw-r--r--arch/s390/kernel/idle.c24
-rw-r--r--arch/s390/kernel/irq.c89
-rw-r--r--arch/s390/kernel/nmi.c19
-rw-r--r--arch/s390/kernel/perf_cpum_cf_diag.c4
-rw-r--r--arch/s390/kernel/perf_cpum_sf.c2
-rw-r--r--arch/s390/kernel/process.c30
-rw-r--r--arch/s390/kernel/ptrace.c117
-rw-r--r--arch/s390/kernel/setup.c23
-rw-r--r--arch/s390/kernel/signal.c13
-rw-r--r--arch/s390/kernel/smp.c19
-rw-r--r--arch/s390/kernel/syscall.c (renamed from arch/s390/kernel/sys_s390.c)66
-rw-r--r--arch/s390/kernel/time.c50
-rw-r--r--arch/s390/kernel/traps.c65
-rw-r--r--arch/s390/kernel/uprobes.c6
-rw-r--r--arch/s390/kernel/vdso.c290
-rw-r--r--arch/s390/kernel/vdso64/getcpu.c6
-rw-r--r--arch/s390/kernel/vdso64/vdso64.lds.S7
-rw-r--r--arch/s390/kernel/vtime.c18
-rw-r--r--arch/s390/kvm/kvm-s390.c27
-rw-r--r--arch/s390/kvm/vsie.c3
-rw-r--r--arch/s390/lib/uaccess.c12
-rw-r--r--arch/s390/mm/fault.c2
-rw-r--r--arch/s390/pci/pci.c57
-rw-r--r--arch/s390/pci/pci_clp.c40
-rw-r--r--arch/s390/pci/pci_event.c6
71 files changed, 1187 insertions, 1379 deletions
diff --git a/arch/Kconfig b/arch/Kconfig
index 4790a5f23d9f..baf67e7f059a 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -295,6 +295,10 @@ config ARCH_32BIT_OFF_T
still support 32-bit off_t. This option is enabled for all such
architectures explicitly.
+# Selected by 64 bit architectures which have a 32 bit f_tinode in struct ustat
+config ARCH_32BIT_USTAT_F_TINODE
+ bool
+
config HAVE_ASM_MODVERSIONS
bool
help
diff --git a/arch/alpha/Kconfig b/arch/alpha/Kconfig
index a401c1481a11..5998106faa60 100644
--- a/arch/alpha/Kconfig
+++ b/arch/alpha/Kconfig
@@ -2,6 +2,7 @@
config ALPHA
bool
default y
+ select ARCH_32BIT_USTAT_F_TINODE
select ARCH_MIGHT_HAVE_PC_PARPORT
select ARCH_MIGHT_HAVE_PC_SERIO
select ARCH_NO_PREEMPT
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index 41d6498dcbaa..e8f7216f6c63 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -58,6 +58,7 @@ config S390
# Note: keep this list sorted alphabetically
#
imply IMA_SECURE_AND_OR_TRUSTED_BOOT
+ select ARCH_32BIT_USTAT_F_TINODE
select ARCH_BINFMT_ELF_STATE
select ARCH_HAS_DEBUG_VM_PGTABLE
select ARCH_HAS_DEBUG_WX
@@ -123,11 +124,13 @@ config S390
select GENERIC_ALLOCATOR
select GENERIC_CPU_AUTOPROBE
select GENERIC_CPU_VULNERABILITIES
+ select GENERIC_ENTRY
select GENERIC_FIND_FIRST_BIT
select GENERIC_GETTIMEOFDAY
select GENERIC_PTDUMP
select GENERIC_SMP_IDLE_THREAD
select GENERIC_TIME_VSYSCALL
+ select GENERIC_VDSO_TIME_NS
select HAVE_ALIGNED_STRUCT_PAGE if SLUB
select HAVE_ARCH_AUDITSYSCALL
select HAVE_ARCH_JUMP_LABEL
diff --git a/arch/s390/Kconfig.debug b/arch/s390/Kconfig.debug
index 6bfaceebbbc0..ef96c25fa921 100644
--- a/arch/s390/Kconfig.debug
+++ b/arch/s390/Kconfig.debug
@@ -6,10 +6,12 @@ config TRACE_IRQFLAGS_SUPPORT
config EARLY_PRINTK
def_bool y
-config DEBUG_USER_ASCE
- bool "Debug User ASCE"
+config DEBUG_ENTRY
+ bool "Debug low-level entry code"
+ depends on DEBUG_KERNEL
help
- Check on exit to user space that address space control
- elements are setup correctly.
+ This option enables sanity checks in s390 low-level entry code.
+ Some of these sanity checks may slow down kernel entries and
+ exits or otherwise impact performance.
If unsure, say N.
diff --git a/arch/s390/configs/debug_defconfig b/arch/s390/configs/debug_defconfig
index 8b94347705e5..6896b4213c49 100644
--- a/arch/s390/configs/debug_defconfig
+++ b/arch/s390/configs/debug_defconfig
@@ -40,6 +40,7 @@ CONFIG_USERFAULTFD=y
# CONFIG_COMPAT_BRK is not set
CONFIG_PROFILING=y
CONFIG_LIVEPATCH=y
+CONFIG_MARCH_ZEC12=y
CONFIG_TUNE_ZEC12=y
CONFIG_NR_CPUS=512
CONFIG_NUMA=y
@@ -176,13 +177,17 @@ CONFIG_NF_CONNTRACK_TFTP=m
CONFIG_NF_CT_NETLINK=m
CONFIG_NF_CT_NETLINK_TIMEOUT=m
CONFIG_NF_TABLES=m
+CONFIG_NF_TABLES_INET=y
CONFIG_NFT_CT=m
CONFIG_NFT_COUNTER=m
CONFIG_NFT_LOG=m
CONFIG_NFT_LIMIT=m
CONFIG_NFT_NAT=m
+CONFIG_NFT_OBJREF=m
+CONFIG_NFT_REJECT=m
CONFIG_NFT_COMPAT=m
CONFIG_NFT_HASH=m
+CONFIG_NFT_FIB_INET=m
CONFIG_NETFILTER_XT_SET=m
CONFIG_NETFILTER_XT_TARGET_AUDIT=m
CONFIG_NETFILTER_XT_TARGET_CHECKSUM=m
@@ -274,6 +279,7 @@ CONFIG_IP_VS_NQ=m
CONFIG_IP_VS_FTP=m
CONFIG_IP_VS_PE_SIP=m
CONFIG_NF_TABLES_IPV4=y
+CONFIG_NFT_FIB_IPV4=m
CONFIG_NF_TABLES_ARP=y
CONFIG_IP_NF_IPTABLES=m
CONFIG_IP_NF_MATCH_AH=m
@@ -294,6 +300,7 @@ CONFIG_IP_NF_ARPTABLES=m
CONFIG_IP_NF_ARPFILTER=m
CONFIG_IP_NF_ARP_MANGLE=m
CONFIG_NF_TABLES_IPV6=y
+CONFIG_NFT_FIB_IPV6=m
CONFIG_IP6_NF_IPTABLES=m
CONFIG_IP6_NF_MATCH_AH=m
CONFIG_IP6_NF_MATCH_EUI64=m
@@ -629,7 +636,6 @@ CONFIG_NTFS_RW=y
CONFIG_PROC_KCORE=y
CONFIG_TMPFS=y
CONFIG_TMPFS_POSIX_ACL=y
-CONFIG_TMPFS_INODE64=y
CONFIG_HUGETLBFS=y
CONFIG_CONFIGFS_FS=m
CONFIG_ECRYPT_FS=m
@@ -791,6 +797,8 @@ CONFIG_DEBUG_OBJECTS_RCU_HEAD=y
CONFIG_DEBUG_OBJECTS_PERCPU_COUNTER=y
CONFIG_SLUB_DEBUG_ON=y
CONFIG_SLUB_STATS=y
+CONFIG_DEBUG_KMEMLEAK=y
+CONFIG_DEBUG_KMEMLEAK_DEFAULT_OFF=y
CONFIG_DEBUG_STACK_USAGE=y
CONFIG_DEBUG_VM=y
CONFIG_DEBUG_VM_VMACACHE=y
@@ -831,7 +839,6 @@ CONFIG_BPF_KPROBE_OVERRIDE=y
CONFIG_HIST_TRIGGERS=y
CONFIG_FTRACE_STARTUP_TEST=y
# CONFIG_EVENT_TRACE_STARTUP_TEST is not set
-CONFIG_DEBUG_USER_ASCE=y
CONFIG_NOTIFIER_ERROR_INJECTION=m
CONFIG_NETDEV_NOTIFIER_ERROR_INJECT=m
CONFIG_FAULT_INJECTION=y
@@ -855,3 +862,4 @@ CONFIG_PERCPU_TEST=m
CONFIG_ATOMIC64_SELFTEST=y
CONFIG_TEST_BITOPS=m
CONFIG_TEST_BPF=m
+CONFIG_DEBUG_ENTRY=y
diff --git a/arch/s390/configs/defconfig b/arch/s390/configs/defconfig
index 9db1232e09f4..ef4df9d60d6a 100644
--- a/arch/s390/configs/defconfig
+++ b/arch/s390/configs/defconfig
@@ -38,6 +38,7 @@ CONFIG_USERFAULTFD=y
# CONFIG_COMPAT_BRK is not set
CONFIG_PROFILING=y
CONFIG_LIVEPATCH=y
+CONFIG_MARCH_ZEC12=y
CONFIG_TUNE_ZEC12=y
CONFIG_NR_CPUS=512
CONFIG_NUMA=y
@@ -167,13 +168,17 @@ CONFIG_NF_CONNTRACK_TFTP=m
CONFIG_NF_CT_NETLINK=m
CONFIG_NF_CT_NETLINK_TIMEOUT=m
CONFIG_NF_TABLES=m
+CONFIG_NF_TABLES_INET=y
CONFIG_NFT_CT=m
CONFIG_NFT_COUNTER=m
CONFIG_NFT_LOG=m
CONFIG_NFT_LIMIT=m
CONFIG_NFT_NAT=m
+CONFIG_NFT_OBJREF=m
+CONFIG_NFT_REJECT=m
CONFIG_NFT_COMPAT=m
CONFIG_NFT_HASH=m
+CONFIG_NFT_FIB_INET=m
CONFIG_NETFILTER_XT_SET=m
CONFIG_NETFILTER_XT_TARGET_AUDIT=m
CONFIG_NETFILTER_XT_TARGET_CHECKSUM=m
@@ -265,6 +270,7 @@ CONFIG_IP_VS_NQ=m
CONFIG_IP_VS_FTP=m
CONFIG_IP_VS_PE_SIP=m
CONFIG_NF_TABLES_IPV4=y
+CONFIG_NFT_FIB_IPV4=m
CONFIG_NF_TABLES_ARP=y
CONFIG_IP_NF_IPTABLES=m
CONFIG_IP_NF_MATCH_AH=m
@@ -285,6 +291,7 @@ CONFIG_IP_NF_ARPTABLES=m
CONFIG_IP_NF_ARPFILTER=m
CONFIG_IP_NF_ARP_MANGLE=m
CONFIG_NF_TABLES_IPV6=y
+CONFIG_NFT_FIB_IPV6=m
CONFIG_IP6_NF_IPTABLES=m
CONFIG_IP6_NF_MATCH_AH=m
CONFIG_IP6_NF_MATCH_EUI64=m
@@ -617,7 +624,6 @@ CONFIG_NTFS_RW=y
CONFIG_PROC_KCORE=y
CONFIG_TMPFS=y
CONFIG_TMPFS_POSIX_ACL=y
-CONFIG_TMPFS_INODE64=y
CONFIG_HUGETLBFS=y
CONFIG_CONFIGFS_FS=m
CONFIG_ECRYPT_FS=m
@@ -779,7 +785,6 @@ CONFIG_FTRACE_SYSCALLS=y
CONFIG_BLK_DEV_IO_TRACE=y
CONFIG_BPF_KPROBE_OVERRIDE=y
CONFIG_HIST_TRIGGERS=y
-CONFIG_DEBUG_USER_ASCE=y
CONFIG_LKDTM=m
CONFIG_PERCPU_TEST=m
CONFIG_ATOMIC64_SELFTEST=y
diff --git a/arch/s390/configs/zfcpdump_defconfig b/arch/s390/configs/zfcpdump_defconfig
index 1ef211dae77a..acf982a2ae4c 100644
--- a/arch/s390/configs/zfcpdump_defconfig
+++ b/arch/s390/configs/zfcpdump_defconfig
@@ -3,11 +3,13 @@ CONFIG_NO_HZ_IDLE=y
CONFIG_HIGH_RES_TIMERS=y
# CONFIG_CPU_ISOLATION is not set
# CONFIG_UTS_NS is not set
+# CONFIG_TIME_NS is not set
# CONFIG_PID_NS is not set
# CONFIG_NET_NS is not set
CONFIG_BLK_DEV_INITRD=y
CONFIG_CC_OPTIMIZE_FOR_SIZE=y
# CONFIG_COMPAT_BRK is not set
+CONFIG_MARCH_ZEC12=y
CONFIG_TUNE_ZEC12=y
# CONFIG_COMPAT is not set
CONFIG_NR_CPUS=2
diff --git a/arch/s390/crypto/paes_s390.c b/arch/s390/crypto/paes_s390.c
index f3caeb17c85b..a279b7d23a5e 100644
--- a/arch/s390/crypto/paes_s390.c
+++ b/arch/s390/crypto/paes_s390.c
@@ -22,6 +22,7 @@
#include <linux/init.h>
#include <linux/mutex.h>
#include <linux/spinlock.h>
+#include <linux/delay.h>
#include <crypto/internal/skcipher.h>
#include <crypto/xts.h>
#include <asm/cpacf.h>
@@ -128,6 +129,9 @@ static inline int __paes_keyblob2pkey(struct key_blob *kb,
/* try three times in case of failure */
for (i = 0; i < 3; i++) {
+ if (i > 0 && ret == -EAGAIN && in_task())
+ if (msleep_interruptible(1000))
+ return -EINTR;
ret = pkey_keyblob2pkey(kb->key, kb->keylen, pk);
if (ret == 0)
break;
@@ -138,10 +142,12 @@ static inline int __paes_keyblob2pkey(struct key_blob *kb,
static inline int __paes_convert_key(struct s390_paes_ctx *ctx)
{
+ int ret;
struct pkey_protkey pkey;
- if (__paes_keyblob2pkey(&ctx->kb, &pkey))
- return -EINVAL;
+ ret = __paes_keyblob2pkey(&ctx->kb, &pkey);
+ if (ret)
+ return ret;
spin_lock_bh(&ctx->pk_lock);
memcpy(&ctx->pk, &pkey, sizeof(pkey));
@@ -169,10 +175,12 @@ static void ecb_paes_exit(struct crypto_skcipher *tfm)
static inline int __ecb_paes_set_key(struct s390_paes_ctx *ctx)
{
+ int rc;
unsigned long fc;
- if (__paes_convert_key(ctx))
- return -EINVAL;
+ rc = __paes_convert_key(ctx);
+ if (rc)
+ return rc;
/* Pick the correct function code based on the protected key type */
fc = (ctx->pk.type == PKEY_KEYTYPE_AES_128) ? CPACF_KM_PAES_128 :
@@ -282,10 +290,12 @@ static void cbc_paes_exit(struct crypto_skcipher *tfm)
static inline int __cbc_paes_set_key(struct s390_paes_ctx *ctx)
{
+ int rc;
unsigned long fc;
- if (__paes_convert_key(ctx))
- return -EINVAL;
+ rc = __paes_convert_key(ctx);
+ if (rc)
+ return rc;
/* Pick the correct function code based on the protected key type */
fc = (ctx->pk.type == PKEY_KEYTYPE_AES_128) ? CPACF_KMC_PAES_128 :
@@ -577,10 +587,12 @@ static void ctr_paes_exit(struct crypto_skcipher *tfm)
static inline int __ctr_paes_set_key(struct s390_paes_ctx *ctx)
{
+ int rc;
unsigned long fc;
- if (__paes_convert_key(ctx))
- return -EINVAL;
+ rc = __paes_convert_key(ctx);
+ if (rc)
+ return rc;
/* Pick the correct function code based on the protected key type */
fc = (ctx->pk.type == PKEY_KEYTYPE_AES_128) ? CPACF_KMCTR_PAES_128 :
diff --git a/arch/s390/crypto/prng.c b/arch/s390/crypto/prng.c
index b2f219ec379c..234d791ca59d 100644
--- a/arch/s390/crypto/prng.c
+++ b/arch/s390/crypto/prng.c
@@ -414,7 +414,7 @@ static int __init prng_sha512_instantiate(void)
}
/* append the seed by 16 bytes of unique nonce */
- get_tod_clock_ext(seed + seedlen);
+ store_tod_clock_ext((union tod_clock *)(seed + seedlen));
seedlen += 16;
/* now initial seed of the prno drng */
diff --git a/arch/s390/hypfs/hypfs_diag0c.c b/arch/s390/hypfs/hypfs_diag0c.c
index 3235e4d82f2d..6c43d2ba2079 100644
--- a/arch/s390/hypfs/hypfs_diag0c.c
+++ b/arch/s390/hypfs/hypfs_diag0c.c
@@ -84,7 +84,7 @@ static int dbfs_diag0c_create(void **data, void **data_free_ptr, size_t *size)
if (IS_ERR(diag0c_data))
return PTR_ERR(diag0c_data);
memset(&diag0c_data->hdr, 0, sizeof(diag0c_data->hdr));
- get_tod_clock_ext(diag0c_data->hdr.tod_ext);
+ store_tod_clock_ext((union tod_clock *)diag0c_data->hdr.tod_ext);
diag0c_data->hdr.len = count * sizeof(struct hypfs_diag0c_entry);
diag0c_data->hdr.version = DBFS_D0C_HDR_VERSION;
diag0c_data->hdr.count = count;
diff --git a/arch/s390/hypfs/hypfs_vm.c b/arch/s390/hypfs/hypfs_vm.c
index e1fcc03159ef..33f973ff9744 100644
--- a/arch/s390/hypfs/hypfs_vm.c
+++ b/arch/s390/hypfs/hypfs_vm.c
@@ -234,7 +234,7 @@ failed:
struct dbfs_d2fc_hdr {
u64 len; /* Length of d2fc buffer without header */
u16 version; /* Version of header */
- char tod_ext[STORE_CLOCK_EXT_SIZE]; /* TOD clock for d2fc */
+ union tod_clock tod_ext; /* TOD clock for d2fc */
u64 count; /* Number of VM guests in d2fc buffer */
char reserved[30];
} __attribute__ ((packed));
@@ -252,7 +252,7 @@ static int dbfs_diag2fc_create(void **data, void **data_free_ptr, size_t *size)
d2fc = diag2fc_store(guest_query, &count, sizeof(d2fc->hdr));
if (IS_ERR(d2fc))
return PTR_ERR(d2fc);
- get_tod_clock_ext(d2fc->hdr.tod_ext);
+ store_tod_clock_ext(&d2fc->hdr.tod_ext);
d2fc->hdr.len = count * sizeof(struct diag2fc_data);
d2fc->hdr.version = DBFS_D2FC_HDR_VERSION;
d2fc->hdr.count = count;
diff --git a/arch/s390/include/asm/alternative.h b/arch/s390/include/asm/alternative.h
index 1c8a38f762a3..d3880ca764ee 100644
--- a/arch/s390/include/asm/alternative.h
+++ b/arch/s390/include/asm/alternative.h
@@ -145,6 +145,22 @@ void apply_alternatives(struct alt_instr *start, struct alt_instr *end);
asm_inline volatile(ALTERNATIVE_2(oldinstr, altinstr1, facility1, \
altinstr2, facility2) ::: "memory")
+/* Alternative inline assembly with input. */
+#define alternative_input(oldinstr, newinstr, feature, input...) \
+ asm_inline volatile (ALTERNATIVE(oldinstr, newinstr, feature) \
+ : : input)
+
+/* Like alternative_input, but with a single output argument */
+#define alternative_io(oldinstr, altinstr, facility, output, input...) \
+ asm_inline volatile(ALTERNATIVE(oldinstr, altinstr, facility) \
+ : output : input)
+
+/* Use this macro if more than one output parameter is needed. */
+#define ASM_OUTPUT2(a...) a
+
+/* Use this macro if clobbers are needed without inputs. */
+#define ASM_NO_INPUT_CLOBBER(clobber...) : clobber
+
#endif /* __ASSEMBLY__ */
#endif /* _ASM_S390_ALTERNATIVE_H */
diff --git a/arch/s390/include/asm/ap.h b/arch/s390/include/asm/ap.h
index aea32dda3d14..837d1699b109 100644
--- a/arch/s390/include/asm/ap.h
+++ b/arch/s390/include/asm/ap.h
@@ -368,7 +368,7 @@ static inline struct ap_queue_status ap_dqap(ap_qid_t qid,
#if IS_ENABLED(CONFIG_ZCRYPT)
void ap_bus_cfg_chg(void);
#else
-static inline void ap_bus_cfg_chg(void){};
+static inline void ap_bus_cfg_chg(void){}
#endif
#endif /* _ASM_S390_AP_H_ */
diff --git a/arch/s390/include/asm/atomic.h b/arch/s390/include/asm/atomic.h
index 11c5952e1afa..5860ae790f2d 100644
--- a/arch/s390/include/asm/atomic.h
+++ b/arch/s390/include/asm/atomic.h
@@ -44,16 +44,6 @@ static inline int atomic_fetch_add(int i, atomic_t *v)
static inline void atomic_add(int i, atomic_t *v)
{
-#ifdef CONFIG_HAVE_MARCH_Z196_FEATURES
- /*
- * Order of conditions is important to circumvent gcc 10 bug:
- * https://gcc.gnu.org/pipermail/gcc-patches/2020-July/549318.html
- */
- if ((i > -129) && (i < 128) && __builtin_constant_p(i)) {
- __atomic_add_const(i, &v->counter);
- return;
- }
-#endif
__atomic_add(i, &v->counter);
}
@@ -115,16 +105,6 @@ static inline s64 atomic64_fetch_add(s64 i, atomic64_t *v)
static inline void atomic64_add(s64 i, atomic64_t *v)
{
-#ifdef CONFIG_HAVE_MARCH_Z196_FEATURES
- /*
- * Order of conditions is important to circumvent gcc 10 bug:
- * https://gcc.gnu.org/pipermail/gcc-patches/2020-July/549318.html
- */
- if ((i > -129) && (i < 128) && __builtin_constant_p(i)) {
- __atomic64_add_const(i, (long *)&v->counter);
- return;
- }
-#endif
__atomic64_add(i, (long *)&v->counter);
}
diff --git a/arch/s390/include/asm/bitops.h b/arch/s390/include/asm/bitops.h
index 431e208a5ea4..31121d32f81d 100644
--- a/arch/s390/include/asm/bitops.h
+++ b/arch/s390/include/asm/bitops.h
@@ -61,18 +61,6 @@ static __always_inline void arch_set_bit(unsigned long nr, volatile unsigned lon
unsigned long *addr = __bitops_word(nr, ptr);
unsigned long mask;
-#ifdef CONFIG_HAVE_MARCH_ZEC12_FEATURES
- if (__builtin_constant_p(nr)) {
- unsigned char *caddr = __bitops_byte(nr, ptr);
-
- asm volatile(
- "oi %0,%b1\n"
- : "+Q" (*caddr)
- : "i" (1 << (nr & 7))
- : "cc", "memory");
- return;
- }
-#endif
mask = 1UL << (nr & (BITS_PER_LONG - 1));
__atomic64_or(mask, (long *)addr);
}
@@ -82,18 +70,6 @@ static __always_inline void arch_clear_bit(unsigned long nr, volatile unsigned l
unsigned long *addr = __bitops_word(nr, ptr);
unsigned long mask;
-#ifdef CONFIG_HAVE_MARCH_ZEC12_FEATURES
- if (__builtin_constant_p(nr)) {
- unsigned char *caddr = __bitops_byte(nr, ptr);
-
- asm volatile(
- "ni %0,%b1\n"
- : "+Q" (*caddr)
- : "i" (~(1 << (nr & 7)))
- : "cc", "memory");
- return;
- }
-#endif
mask = ~(1UL << (nr & (BITS_PER_LONG - 1)));
__atomic64_and(mask, (long *)addr);
}
@@ -104,18 +80,6 @@ static __always_inline void arch_change_bit(unsigned long nr,
unsigned long *addr = __bitops_word(nr, ptr);
unsigned long mask;
-#ifdef CONFIG_HAVE_MARCH_ZEC12_FEATURES
- if (__builtin_constant_p(nr)) {
- unsigned char *caddr = __bitops_byte(nr, ptr);
-
- asm volatile(
- "xi %0,%b1\n"
- : "+Q" (*caddr)
- : "i" (1 << (nr & 7))
- : "cc", "memory");
- return;
- }
-#endif
mask = 1UL << (nr & (BITS_PER_LONG - 1));
__atomic64_xor(mask, (long *)addr);
}
diff --git a/arch/s390/include/asm/cputime.h b/arch/s390/include/asm/cputime.h
index cb729d111e20..1d389847b588 100644
--- a/arch/s390/include/asm/cputime.h
+++ b/arch/s390/include/asm/cputime.h
@@ -35,4 +35,6 @@ u64 arch_cpu_idle_time(int cpu);
#define arch_idle_time(cpu) arch_cpu_idle_time(cpu)
+void account_idle_time_irq(void);
+
#endif /* _S390_CPUTIME_H */
diff --git a/arch/s390/include/asm/elf.h b/arch/s390/include/asm/elf.h
index 5775fc22f410..66d51ad090ab 100644
--- a/arch/s390/include/asm/elf.h
+++ b/arch/s390/include/asm/elf.h
@@ -233,8 +233,7 @@ extern char elf_platform[];
do { \
set_personality(PER_LINUX | \
(current->personality & (~PER_MASK))); \
- current->thread.sys_call_table = \
- (unsigned long) &sys_call_table; \
+ current->thread.sys_call_table = sys_call_table; \
} while (0)
#else /* CONFIG_COMPAT */
#define SET_PERSONALITY(ex) \
@@ -245,11 +244,11 @@ do { \
if ((ex).e_ident[EI_CLASS] == ELFCLASS32) { \
set_thread_flag(TIF_31BIT); \
current->thread.sys_call_table = \
- (unsigned long) &sys_call_table_emu; \
+ sys_call_table_emu; \
} else { \
clear_thread_flag(TIF_31BIT); \
current->thread.sys_call_table = \
- (unsigned long) &sys_call_table; \
+ sys_call_table; \
} \
} while (0)
#endif /* CONFIG_COMPAT */
diff --git a/arch/s390/include/asm/entry-common.h b/arch/s390/include/asm/entry-common.h
new file mode 100644
index 000000000000..75cebc80474e
--- /dev/null
+++ b/arch/s390/include/asm/entry-common.h
@@ -0,0 +1,60 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef ARCH_S390_ENTRY_COMMON_H
+#define ARCH_S390_ENTRY_COMMON_H
+
+#include <linux/sched.h>
+#include <linux/audit.h>
+#include <linux/tracehook.h>
+#include <linux/processor.h>
+#include <linux/uaccess.h>
+#include <asm/fpu/api.h>
+
+#define ARCH_EXIT_TO_USER_MODE_WORK (_TIF_GUARDED_STORAGE | _TIF_PER_TRAP)
+
+void do_per_trap(struct pt_regs *regs);
+void do_syscall(struct pt_regs *regs);
+
+typedef void (*pgm_check_func)(struct pt_regs *regs);
+
+extern pgm_check_func pgm_check_table[128];
+
+#ifdef CONFIG_DEBUG_ENTRY
+static __always_inline void arch_check_user_regs(struct pt_regs *regs)
+{
+ debug_user_asce(0);
+}
+
+#define arch_check_user_regs arch_check_user_regs
+#endif /* CONFIG_DEBUG_ENTRY */
+
+static __always_inline void arch_exit_to_user_mode_work(struct pt_regs *regs,
+ unsigned long ti_work)
+{
+ if (ti_work & _TIF_PER_TRAP) {
+ clear_thread_flag(TIF_PER_TRAP);
+ do_per_trap(regs);
+ }
+
+ if (ti_work & _TIF_GUARDED_STORAGE)
+ gs_load_bc_cb(regs);
+}
+
+#define arch_exit_to_user_mode_work arch_exit_to_user_mode_work
+
+static __always_inline void arch_exit_to_user_mode(void)
+{
+ if (test_cpu_flag(CIF_FPU))
+ __load_fpu_regs();
+
+ if (IS_ENABLED(CONFIG_DEBUG_ENTRY))
+ debug_user_asce(1);
+}
+
+#define arch_exit_to_user_mode arch_exit_to_user_mode
+
+static inline bool on_thread_stack(void)
+{
+ return !(((unsigned long)(current->stack) ^ current_stack_pointer()) & ~(THREAD_SIZE - 1));
+}
+
+#endif
diff --git a/arch/s390/include/asm/fpu/api.h b/arch/s390/include/asm/fpu/api.h
index 34a7ae68485c..a959b815a58b 100644
--- a/arch/s390/include/asm/fpu/api.h
+++ b/arch/s390/include/asm/fpu/api.h
@@ -47,6 +47,8 @@
#include <linux/preempt.h>
void save_fpu_regs(void);
+void load_fpu_regs(void);
+void __load_fpu_regs(void);
static inline int test_fp_ctl(u32 fpc)
{
diff --git a/arch/s390/include/asm/idle.h b/arch/s390/include/asm/idle.h
index 6d4226dcf42a..b04f6a794cdf 100644
--- a/arch/s390/include/asm/idle.h
+++ b/arch/s390/include/asm/idle.h
@@ -20,11 +20,13 @@ struct s390_idle_data {
unsigned long long clock_idle_exit;
unsigned long long timer_idle_enter;
unsigned long long timer_idle_exit;
+ unsigned long mt_cycles_enter[8];
};
extern struct device_attribute dev_attr_idle_count;
extern struct device_attribute dev_attr_idle_time_us;
-void psw_idle(struct s390_idle_data *, unsigned long);
+void psw_idle(struct s390_idle_data *data, unsigned long psw_mask);
+void psw_idle_exit(void);
#endif /* _S390_IDLE_H */
diff --git a/arch/s390/include/asm/lowcore.h b/arch/s390/include/asm/lowcore.h
index 69ce9191eaf1..22bceeeba4bc 100644
--- a/arch/s390/include/asm/lowcore.h
+++ b/arch/s390/include/asm/lowcore.h
@@ -81,8 +81,8 @@ struct lowcore {
psw_t return_mcck_psw; /* 0x02a0 */
/* CPU accounting and timing values. */
- __u64 sync_enter_timer; /* 0x02b0 */
- __u64 async_enter_timer; /* 0x02b8 */
+ __u64 sys_enter_timer; /* 0x02b0 */
+ __u8 pad_0x02b8[0x02c0-0x02b8]; /* 0x02b8 */
__u64 mcck_enter_timer; /* 0x02c0 */
__u64 exit_timer; /* 0x02c8 */
__u64 user_timer; /* 0x02d0 */
@@ -107,16 +107,15 @@ struct lowcore {
__u64 async_stack; /* 0x0350 */
__u64 nodat_stack; /* 0x0358 */
__u64 restart_stack; /* 0x0360 */
-
+ __u64 mcck_stack; /* 0x0368 */
/* Restart function and parameter. */
- __u64 restart_fn; /* 0x0368 */
- __u64 restart_data; /* 0x0370 */
- __u64 restart_source; /* 0x0378 */
+ __u64 restart_fn; /* 0x0370 */
+ __u64 restart_data; /* 0x0378 */
+ __u64 restart_source; /* 0x0380 */
/* Address space pointer. */
- __u64 kernel_asce; /* 0x0380 */
- __u64 user_asce; /* 0x0388 */
- __u8 pad_0x0390[0x0398-0x0390]; /* 0x0390 */
+ __u64 kernel_asce; /* 0x0388 */
+ __u64 user_asce; /* 0x0390 */
/*
* The lpp and current_pid fields form a
diff --git a/arch/s390/include/asm/nmi.h b/arch/s390/include/asm/nmi.h
index 5afee80cff58..20e51c9ff240 100644
--- a/arch/s390/include/asm/nmi.h
+++ b/arch/s390/include/asm/nmi.h
@@ -99,6 +99,7 @@ int nmi_alloc_per_cpu(struct lowcore *lc);
void nmi_free_per_cpu(struct lowcore *lc);
void s390_handle_mcck(void);
+void __s390_handle_mcck(void);
int s390_do_machine_check(struct pt_regs *regs);
#endif /* __ASSEMBLY__ */
diff --git a/arch/s390/include/asm/pci.h b/arch/s390/include/asm/pci.h
index 212628932ddc..053fe8b8dec7 100644
--- a/arch/s390/include/asm/pci.h
+++ b/arch/s390/include/asm/pci.h
@@ -201,7 +201,7 @@ extern unsigned int s390_pci_no_rid;
Prototypes
----------------------------------------------------------------------------- */
/* Base stuff */
-int zpci_create_device(struct zpci_dev *);
+int zpci_create_device(u32 fid, u32 fh, enum zpci_state state);
void zpci_remove_device(struct zpci_dev *zdev);
int zpci_enable_device(struct zpci_dev *);
int zpci_disable_device(struct zpci_dev *);
@@ -212,7 +212,7 @@ void zpci_remove_reserved_devices(void);
/* CLP */
int clp_setup_writeback_mio(void);
int clp_scan_pci_devices(void);
-int clp_add_pci_device(u32, u32, int);
+int clp_query_pci_fn(struct zpci_dev *zdev);
int clp_enable_fh(struct zpci_dev *, u8);
int clp_disable_fh(struct zpci_dev *);
int clp_get_state(u32 fid, enum zpci_state *state);
diff --git a/arch/s390/include/asm/preempt.h b/arch/s390/include/asm/preempt.h
index 6ede29907fbf..b49e0492842c 100644
--- a/arch/s390/include/asm/preempt.h
+++ b/arch/s390/include/asm/preempt.h
@@ -131,9 +131,9 @@ static inline bool should_resched(int preempt_offset)
#endif /* CONFIG_HAVE_MARCH_Z196_FEATURES */
#ifdef CONFIG_PREEMPTION
-extern asmlinkage void preempt_schedule(void);
+extern void preempt_schedule(void);
#define __preempt_schedule() preempt_schedule()
-extern asmlinkage void preempt_schedule_notrace(void);
+extern void preempt_schedule_notrace(void);
#define __preempt_schedule_notrace() preempt_schedule_notrace()
#endif /* CONFIG_PREEMPTION */
diff --git a/arch/s390/include/asm/processor.h b/arch/s390/include/asm/processor.h
index 2058a435add4..023a15dc25a3 100644
--- a/arch/s390/include/asm/processor.h
+++ b/arch/s390/include/asm/processor.h
@@ -38,6 +38,9 @@
#include <asm/runtime_instr.h>
#include <asm/fpu/types.h>
#include <asm/fpu/internal.h>
+#include <asm/irqflags.h>
+
+typedef long (*sys_call_ptr_t)(struct pt_regs *regs);
static inline void set_cpu_flag(int flag)
{
@@ -101,31 +104,32 @@ extern void __bpon(void);
*/
struct thread_struct {
unsigned int acrs[NUM_ACRS];
- unsigned long ksp; /* kernel stack pointer */
- unsigned long user_timer; /* task cputime in user space */
- unsigned long guest_timer; /* task cputime in kvm guest */
- unsigned long system_timer; /* task cputime in kernel space */
- unsigned long hardirq_timer; /* task cputime in hardirq context */
- unsigned long softirq_timer; /* task cputime in softirq context */
- unsigned long sys_call_table; /* system call table address */
- unsigned long gmap_addr; /* address of last gmap fault. */
- unsigned int gmap_write_flag; /* gmap fault write indication */
- unsigned int gmap_int_code; /* int code of last gmap fault */
- unsigned int gmap_pfault; /* signal of a pending guest pfault */
+ unsigned long ksp; /* kernel stack pointer */
+ unsigned long user_timer; /* task cputime in user space */
+ unsigned long guest_timer; /* task cputime in kvm guest */
+ unsigned long system_timer; /* task cputime in kernel space */
+ unsigned long hardirq_timer; /* task cputime in hardirq context */
+ unsigned long softirq_timer; /* task cputime in softirq context */
+ const sys_call_ptr_t *sys_call_table; /* system call table address */
+ unsigned long gmap_addr; /* address of last gmap fault. */
+ unsigned int gmap_write_flag; /* gmap fault write indication */
+ unsigned int gmap_int_code; /* int code of last gmap fault */
+ unsigned int gmap_pfault; /* signal of a pending guest pfault */
+
/* Per-thread information related to debugging */
- struct per_regs per_user; /* User specified PER registers */
- struct per_event per_event; /* Cause of the last PER trap */
- unsigned long per_flags; /* Flags to control debug behavior */
- unsigned int system_call; /* system call number in signal */
- unsigned long last_break; /* last breaking-event-address. */
- /* pfault_wait is used to block the process on a pfault event */
+ struct per_regs per_user; /* User specified PER registers */
+ struct per_event per_event; /* Cause of the last PER trap */
+ unsigned long per_flags; /* Flags to control debug behavior */
+ unsigned int system_call; /* system call number in signal */
+ unsigned long last_break; /* last breaking-event-address. */
+ /* pfault_wait is used to block the process on a pfault event */
unsigned long pfault_wait;
struct list_head list;
/* cpu runtime instrumentation */
struct runtime_instr_cb *ri_cb;
- struct gs_cb *gs_cb; /* Current guarded storage cb */
- struct gs_cb *gs_bc_cb; /* Broadcast guarded storage cb */
- unsigned char trap_tdb[256]; /* Transaction abort diagnose block */
+ struct gs_cb *gs_cb; /* Current guarded storage cb */
+ struct gs_cb *gs_bc_cb; /* Broadcast guarded storage cb */
+ unsigned char trap_tdb[256]; /* Transaction abort diagnose block */
/*
* Warning: 'fpu' is dynamically-sized. It *MUST* be at
* the end.
@@ -184,6 +188,7 @@ static inline void release_thread(struct task_struct *tsk) { }
/* Free guarded storage control block */
void guarded_storage_release(struct task_struct *tsk);
+void gs_load_bc_cb(struct pt_regs *regs);
unsigned long get_wchan(struct task_struct *p);
#define task_pt_regs(tsk) ((struct pt_regs *) \
@@ -324,6 +329,11 @@ extern void memcpy_absolute(void *, void *, size_t);
extern int s390_isolate_bp(void);
extern int s390_isolate_bp_guest(void);
+static __always_inline bool regs_irqs_disabled(struct pt_regs *regs)
+{
+ return arch_irqs_disabled_flags(regs->psw.mask);
+}
+
#endif /* __ASSEMBLY__ */
#endif /* __ASM_S390_PROCESSOR_H */
diff --git a/arch/s390/include/asm/ptrace.h b/arch/s390/include/asm/ptrace.h
index 73ca7f7cac33..f828be78937f 100644
--- a/arch/s390/include/asm/ptrace.h
+++ b/arch/s390/include/asm/ptrace.h
@@ -11,13 +11,13 @@
#include <uapi/asm/ptrace.h>
#define PIF_SYSCALL 0 /* inside a system call */
-#define PIF_PER_TRAP 1 /* deliver sigtrap on return to user */
-#define PIF_SYSCALL_RESTART 2 /* restart the current system call */
+#define PIF_SYSCALL_RESTART 1 /* restart the current system call */
+#define PIF_SYSCALL_RET_SET 2 /* return value was set via ptrace */
#define PIF_GUEST_FAULT 3 /* indicates program check in sie64a */
#define _PIF_SYSCALL BIT(PIF_SYSCALL)
-#define _PIF_PER_TRAP BIT(PIF_PER_TRAP)
#define _PIF_SYSCALL_RESTART BIT(PIF_SYSCALL_RESTART)
+#define _PIF_SYSCALL_RET_SET BIT(PIF_SYSCALL_RET_SET)
#define _PIF_GUEST_FAULT BIT(PIF_GUEST_FAULT)
#ifndef __ASSEMBLY__
@@ -68,6 +68,9 @@ enum {
&(*(struct psw_bits *)(&(__psw))); \
}))
+#define PGM_INT_CODE_MASK 0x7f
+#define PGM_INT_CODE_PER 0x80
+
/*
* The pt_regs struct defines the way the registers are stored on
* the stack during a system call.
diff --git a/arch/s390/include/asm/qdio.h b/arch/s390/include/asm/qdio.h
index 19e84c95d1e7..d9215c7106f0 100644
--- a/arch/s390/include/asm/qdio.h
+++ b/arch/s390/include/asm/qdio.h
@@ -250,17 +250,13 @@ struct slsb {
* struct qdio_outbuf_state - SBAL related asynchronous operation information
* (for communication with upper layer programs)
* (only required for use with completion queues)
- * @flags: flags indicating state of buffer
* @user: pointer to upper layer program's state information related to SBAL
* (stored in user1 data of QAOB)
*/
struct qdio_outbuf_state {
- u8 flags;
void *user;
};
-#define QDIO_OUTBUF_STATE_FLAG_PENDING 0x01
-
#define CHSC_AC1_INITIATE_INPUTQ 0x80
@@ -315,6 +311,7 @@ typedef void qdio_handler_t(struct ccw_device *, unsigned int, int,
#define QDIO_ERROR_GET_BUF_STATE 0x0002
#define QDIO_ERROR_SET_BUF_STATE 0x0004
#define QDIO_ERROR_SLSB_STATE 0x0100
+#define QDIO_ERROR_SLSB_PENDING 0x0200
#define QDIO_ERROR_FATAL 0x00ff
#define QDIO_ERROR_TEMPORARY 0xff00
@@ -336,7 +333,7 @@ typedef void qdio_handler_t(struct ccw_device *, unsigned int, int,
* @no_output_qs: number of output queues
* @input_handler: handler to be called for input queues
* @output_handler: handler to be called for output queues
- * @irq_poll: Data IRQ polling handler (NULL when not supported)
+ * @irq_poll: Data IRQ polling handler
* @scan_threshold: # of in-use buffers that triggers scan on output queue
* @int_parm: interruption parameter
* @input_sbal_addr_array: per-queue array, each element points to 128 SBALs
diff --git a/arch/s390/include/asm/scsw.h b/arch/s390/include/asm/scsw.h
index c00f7b031628..a7c3ccf681da 100644
--- a/arch/s390/include/asm/scsw.h
+++ b/arch/s390/include/asm/scsw.h
@@ -525,8 +525,7 @@ static inline int scsw_cmd_is_valid_pno(union scsw *scsw)
return (scsw->cmd.fctl != 0) &&
(scsw->cmd.stctl & SCSW_STCTL_STATUS_PEND) &&
(!(scsw->cmd.stctl & SCSW_STCTL_INTER_STATUS) ||
- ((scsw->cmd.stctl & SCSW_STCTL_INTER_STATUS) &&
- (scsw->cmd.actl & SCSW_ACTL_SUSPENDED)));
+ (scsw->cmd.actl & SCSW_ACTL_SUSPENDED));
}
/**
diff --git a/arch/s390/include/asm/syscall.h b/arch/s390/include/asm/syscall.h
index d9d5de0f67ff..9107e3dab68c 100644
--- a/arch/s390/include/asm/syscall.h
+++ b/arch/s390/include/asm/syscall.h
@@ -14,8 +14,8 @@
#include <linux/err.h>
#include <asm/ptrace.h>
-extern const unsigned long sys_call_table[];
-extern const unsigned long sys_call_table_emu[];
+extern const sys_call_ptr_t sys_call_table[];
+extern const sys_call_ptr_t sys_call_table_emu[];
static inline long syscall_get_nr(struct task_struct *task,
struct pt_regs *regs)
@@ -56,6 +56,7 @@ static inline void syscall_set_return_value(struct task_struct *task,
struct pt_regs *regs,
int error, long val)
{
+ set_pt_regs_flag(regs, PIF_SYSCALL_RET_SET);
regs->gprs[2] = error ? error : val;
}
@@ -97,4 +98,10 @@ static inline int syscall_get_arch(struct task_struct *task)
#endif
return AUDIT_ARCH_S390X;
}
+
+static inline bool arch_syscall_is_vdso_sigreturn(struct pt_regs *regs)
+{
+ return false;
+}
+
#endif /* _ASM_SYSCALL_H */
diff --git a/arch/s390/include/asm/syscall_wrapper.h b/arch/s390/include/asm/syscall_wrapper.h
index 1320f4213d80..ad2c996e7e93 100644
--- a/arch/s390/include/asm/syscall_wrapper.h
+++ b/arch/s390/include/asm/syscall_wrapper.h
@@ -7,6 +7,33 @@
#ifndef _ASM_S390_SYSCALL_WRAPPER_H
#define _ASM_S390_SYSCALL_WRAPPER_H
+#define __SC_TYPE(t, a) t
+
+#define SYSCALL_PT_ARG6(regs, m, t1, t2, t3, t4, t5, t6)\
+ SYSCALL_PT_ARG5(regs, m, t1, t2, t3, t4, t5), \
+ m(t6, (regs->gprs[7]))
+
+#define SYSCALL_PT_ARG5(regs, m, t1, t2, t3, t4, t5) \
+ SYSCALL_PT_ARG4(regs, m, t1, t2, t3, t4), \
+ m(t5, (regs->gprs[6]))
+
+#define SYSCALL_PT_ARG4(regs, m, t1, t2, t3, t4) \
+ SYSCALL_PT_ARG3(regs, m, t1, t2, t3), \
+ m(t4, (regs->gprs[5]))
+
+#define SYSCALL_PT_ARG3(regs, m, t1, t2, t3) \
+ SYSCALL_PT_ARG2(regs, m, t1, t2), \
+ m(t3, (regs->gprs[4]))
+
+#define SYSCALL_PT_ARG2(regs, m, t1, t2) \
+ SYSCALL_PT_ARG1(regs, m, t1), \
+ m(t2, (regs->gprs[3]))
+
+#define SYSCALL_PT_ARG1(regs, m, t1) \
+ m(t1, (regs->orig_gpr2))
+
+#define SYSCALL_PT_ARGS(x, ...) SYSCALL_PT_ARG##x(__VA_ARGS__)
+
#ifdef CONFIG_COMPAT
#define __SC_COMPAT_TYPE(t, a) \
__typeof(__builtin_choose_expr(sizeof(t) > 4, 0L, (t)0)) a
@@ -29,14 +56,15 @@
(t)__ReS; \
})
-#define __S390_SYS_STUBx(x, name, ...) \
- asmlinkage long __s390_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__));\
- ALLOW_ERROR_INJECTION(__s390_sys##name, ERRNO); \
- asmlinkage long __s390_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__))\
- { \
- long ret = __s390x_sys##name(__MAP(x,__SC_COMPAT_CAST,__VA_ARGS__));\
- __MAP(x,__SC_TEST,__VA_ARGS__); \
- return ret; \
+#define __S390_SYS_STUBx(x, name, ...) \
+ long __s390_sys##name(struct pt_regs *regs); \
+ ALLOW_ERROR_INJECTION(__s390_sys##name, ERRNO); \
+ long __s390_sys##name(struct pt_regs *regs) \
+ { \
+ long ret = __do_sys##name(SYSCALL_PT_ARGS(x, regs, \
+ __SC_COMPAT_CAST, __MAP(x, __SC_TYPE, __VA_ARGS__))); \
+ __MAP(x,__SC_TEST,__VA_ARGS__); \
+ return ret; \
}
/*
@@ -45,17 +73,17 @@
*/
#define COMPAT_SYSCALL_DEFINE0(sname) \
SYSCALL_METADATA(_##sname, 0); \
- asmlinkage long __s390_compat_sys_##sname(void); \
+ long __s390_compat_sys_##sname(void); \
ALLOW_ERROR_INJECTION(__s390_compat_sys_##sname, ERRNO); \
- asmlinkage long __s390_compat_sys_##sname(void)
+ long __s390_compat_sys_##sname(void)
#define SYSCALL_DEFINE0(sname) \
SYSCALL_METADATA(_##sname, 0); \
- asmlinkage long __s390x_sys_##sname(void); \
+ long __s390x_sys_##sname(void); \
ALLOW_ERROR_INJECTION(__s390x_sys_##sname, ERRNO); \
- asmlinkage long __s390_sys_##sname(void) \
+ long __s390_sys_##sname(void) \
__attribute__((alias(__stringify(__s390x_sys_##sname)))); \
- asmlinkage long __s390x_sys_##sname(void)
+ long __s390x_sys_##sname(void)
#define COND_SYSCALL(name) \
cond_syscall(__s390x_sys_##name); \
@@ -65,23 +93,24 @@
SYSCALL_ALIAS(__s390x_sys_##name, sys_ni_posix_timers); \
SYSCALL_ALIAS(__s390_sys_##name, sys_ni_posix_timers)
-#define COMPAT_SYSCALL_DEFINEx(x, name, ...) \
- __diag_push(); \
- __diag_ignore(GCC, 8, "-Wattribute-alias", \
- "Type aliasing is used to sanitize syscall arguments");\
- asmlinkage long __s390_compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)); \
- asmlinkage long __s390_compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)) \
- __attribute__((alias(__stringify(__se_compat_sys##name)))); \
- ALLOW_ERROR_INJECTION(__s390_compat_sys##name, ERRNO); \
- static inline long __do_compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__));\
- asmlinkage long __se_compat_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)); \
- asmlinkage long __se_compat_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)) \
- { \
- long ret = __do_compat_sys##name(__MAP(x,__SC_DELOUSE,__VA_ARGS__));\
- __MAP(x,__SC_TEST,__VA_ARGS__); \
- return ret; \
- } \
- __diag_pop(); \
+#define COMPAT_SYSCALL_DEFINEx(x, name, ...) \
+ __diag_push(); \
+ __diag_ignore(GCC, 8, "-Wattribute-alias", \
+ "Type aliasing is used to sanitize syscall arguments"); \
+ long __s390_compat_sys##name(struct pt_regs *regs); \
+ long __s390_compat_sys##name(struct pt_regs *regs) \
+ __attribute__((alias(__stringify(__se_compat_sys##name)))); \
+ ALLOW_ERROR_INJECTION(__s390_compat_sys##name, ERRNO); \
+ static inline long __do_compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)); \
+ long __se_compat_sys##name(struct pt_regs *regs); \
+ long __se_compat_sys##name(struct pt_regs *regs) \
+ { \
+ long ret = __do_compat_sys##name(SYSCALL_PT_ARGS(x, regs, __SC_DELOUSE, \
+ __MAP(x, __SC_TYPE, __VA_ARGS__))); \
+ __MAP(x,__SC_TEST,__VA_ARGS__); \
+ return ret; \
+ } \
+ __diag_pop(); \
static inline long __do_compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__))
/*
@@ -101,9 +130,9 @@
#define SYSCALL_DEFINE0(sname) \
SYSCALL_METADATA(_##sname, 0); \
- asmlinkage long __s390x_sys_##sname(void); \
+ long __s390x_sys_##sname(void); \
ALLOW_ERROR_INJECTION(__s390x_sys_##sname, ERRNO); \
- asmlinkage long __s390x_sys_##sname(void)
+ long __s390x_sys_##sname(void)
#define COND_SYSCALL(name) \
cond_syscall(__s390x_sys_##name)
@@ -113,23 +142,24 @@
#endif /* CONFIG_COMPAT */
-#define __SYSCALL_DEFINEx(x, name, ...) \
- __diag_push(); \
- __diag_ignore(GCC, 8, "-Wattribute-alias", \
- "Type aliasing is used to sanitize syscall arguments");\
- asmlinkage long __s390x_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)) \
- __attribute__((alias(__stringify(__se_sys##name)))); \
- ALLOW_ERROR_INJECTION(__s390x_sys##name, ERRNO); \
- long __se_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)); \
- static inline long __do_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)); \
- __S390_SYS_STUBx(x, name, __VA_ARGS__) \
- asmlinkage long __se_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)) \
- { \
- long ret = __do_sys##name(__MAP(x,__SC_CAST,__VA_ARGS__)); \
- __MAP(x,__SC_TEST,__VA_ARGS__); \
- return ret; \
- } \
- __diag_pop(); \
+#define __SYSCALL_DEFINEx(x, name, ...) \
+ __diag_push(); \
+ __diag_ignore(GCC, 8, "-Wattribute-alias", \
+ "Type aliasing is used to sanitize syscall arguments"); \
+ long __s390x_sys##name(struct pt_regs *regs) \
+ __attribute__((alias(__stringify(__se_sys##name)))); \
+ ALLOW_ERROR_INJECTION(__s390x_sys##name, ERRNO); \
+ static inline long __do_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)); \
+ long __se_sys##name(struct pt_regs *regs); \
+ __S390_SYS_STUBx(x, name, __VA_ARGS__) \
+ long __se_sys##name(struct pt_regs *regs) \
+ { \
+ long ret = __do_sys##name(SYSCALL_PT_ARGS(x, regs, \
+ __SC_CAST, __MAP(x, __SC_TYPE, __VA_ARGS__))); \
+ __MAP(x,__SC_TEST,__VA_ARGS__); \
+ return ret; \
+ } \
+ __diag_pop(); \
static inline long __do_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__))
#endif /* _ASM_X86_SYSCALL_WRAPPER_H */
diff --git a/arch/s390/include/asm/thread_info.h b/arch/s390/include/asm/thread_info.h
index 3c5b1f909b6d..e6674796aa6f 100644
--- a/arch/s390/include/asm/thread_info.h
+++ b/arch/s390/include/asm/thread_info.h
@@ -36,6 +36,7 @@
*/
struct thread_info {
unsigned long flags; /* low level flags */
+ unsigned long syscall_work; /* SYSCALL_WORK_ flags */
};
/*
@@ -46,6 +47,8 @@ struct thread_info {
.flags = 0, \
}
+struct task_struct;
+
void arch_release_task_struct(struct task_struct *tsk);
int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src);
@@ -68,6 +71,7 @@ void arch_setup_new_exec(void);
#define TIF_NOTIFY_SIGNAL 7 /* signal notifications exist */
#define TIF_ISOLATE_BP 8 /* Run process with isolated BP */
#define TIF_ISOLATE_BP_GUEST 9 /* Run KVM guests with isolated BP */
+#define TIF_PER_TRAP 10 /* Need to handle PER trap on exit to usermode */
#define TIF_31BIT 16 /* 32bit process */
#define TIF_MEMDIE 17 /* is terminating due to OOM killer */
@@ -91,6 +95,7 @@ void arch_setup_new_exec(void);
#define _TIF_PATCH_PENDING BIT(TIF_PATCH_PENDING)
#define _TIF_ISOLATE_BP BIT(TIF_ISOLATE_BP)
#define _TIF_ISOLATE_BP_GUEST BIT(TIF_ISOLATE_BP_GUEST)
+#define _TIF_PER_TRAP BIT(TIF_PER_TRAP)
#define _TIF_31BIT BIT(TIF_31BIT)
#define _TIF_SINGLE_STEP BIT(TIF_SINGLE_STEP)
diff --git a/arch/s390/include/asm/timex.h b/arch/s390/include/asm/timex.h
index c8e244ecdfde..c4e23e925665 100644
--- a/arch/s390/include/asm/timex.h
+++ b/arch/s390/include/asm/timex.h
@@ -19,6 +19,25 @@
extern u64 clock_comparator_max;
+union tod_clock {
+ __uint128_t val;
+ struct {
+ __uint128_t ei : 8; /* epoch index */
+ __uint128_t tod : 64; /* bits 0-63 of tod clock */
+ __uint128_t : 40;
+ __uint128_t pf : 16; /* programmable field */
+ };
+ struct {
+ __uint128_t eitod : 72; /* epoch index + bits 0-63 tod clock */
+ __uint128_t : 56;
+ };
+ struct {
+ __uint128_t us : 60; /* micro-seconds */
+ __uint128_t sus : 12; /* sub-microseconds */
+ __uint128_t : 56;
+ };
+} __packed;
+
/* Inline functions for clock register access. */
static inline int set_tod_clock(__u64 time)
{
@@ -32,18 +51,23 @@ static inline int set_tod_clock(__u64 time)
return cc;
}
-static inline int store_tod_clock(__u64 *time)
+static inline int store_tod_clock_ext_cc(union tod_clock *clk)
{
int cc;
asm volatile(
- " stck %1\n"
+ " stcke %1\n"
" ipm %0\n"
" srl %0,28\n"
- : "=d" (cc), "=Q" (*time) : : "cc");
+ : "=d" (cc), "=Q" (*clk) : : "cc");
return cc;
}
+static inline void store_tod_clock_ext(union tod_clock *tod)
+{
+ asm volatile("stcke %0" : "=Q" (*tod) : : "cc");
+}
+
static inline void set_clock_comparator(__u64 time)
{
asm volatile("sckc %0" : : "Q" (time));
@@ -144,23 +168,15 @@ static inline void local_tick_enable(unsigned long long comp)
}
#define CLOCK_TICK_RATE 1193180 /* Underlying HZ */
-#define STORE_CLOCK_EXT_SIZE 16 /* stcke writes 16 bytes */
typedef unsigned long long cycles_t;
-static inline void get_tod_clock_ext(char *clk)
-{
- typedef struct { char _[STORE_CLOCK_EXT_SIZE]; } addrtype;
-
- asm volatile("stcke %0" : "=Q" (*(addrtype *) clk) : : "cc");
-}
-
static inline unsigned long long get_tod_clock(void)
{
- char clk[STORE_CLOCK_EXT_SIZE];
+ union tod_clock clk;
- get_tod_clock_ext(clk);
- return *((unsigned long long *)&clk[1]);
+ store_tod_clock_ext(&clk);
+ return clk.tod;
}
static inline unsigned long long get_tod_clock_fast(void)
@@ -183,7 +199,7 @@ static inline cycles_t get_cycles(void)
int get_phys_clock(unsigned long *clock);
void init_cpu_timer(void);
-extern unsigned char tod_clock_base[16] __aligned(8);
+extern union tod_clock tod_clock_base;
/**
* get_clock_monotonic - returns current time in clock rate units
@@ -197,7 +213,7 @@ static inline unsigned long long get_tod_clock_monotonic(void)
unsigned long long tod;
preempt_disable_notrace();
- tod = get_tod_clock() - *(unsigned long long *) &tod_clock_base[1];
+ tod = get_tod_clock() - tod_clock_base.tod;
preempt_enable_notrace();
return tod;
}
diff --git a/arch/s390/include/asm/tlb.h b/arch/s390/include/asm/tlb.h
index 954fa8ca6cbd..fe6407f0eb1b 100644
--- a/arch/s390/include/asm/tlb.h
+++ b/arch/s390/include/asm/tlb.h
@@ -66,7 +66,7 @@ static inline void pte_free_tlb(struct mmu_gather *tlb, pgtable_t pte,
__tlb_adjust_range(tlb, address, PAGE_SIZE);
tlb->mm->context.flush_mm = 1;
tlb->freed_tables = 1;
- tlb->cleared_ptes = 1;
+ tlb->cleared_pmds = 1;
/*
* page_table_free_rcu takes care of the allocation bit masks
* of the 2K table fragments in the 4K page table page,
@@ -110,7 +110,6 @@ static inline void p4d_free_tlb(struct mmu_gather *tlb, p4d_t *p4d,
__tlb_adjust_range(tlb, address, PAGE_SIZE);
tlb->mm->context.flush_mm = 1;
tlb->freed_tables = 1;
- tlb->cleared_p4ds = 1;
tlb_remove_table(tlb, p4d);
}
@@ -128,7 +127,7 @@ static inline void pud_free_tlb(struct mmu_gather *tlb, pud_t *pud,
return;
tlb->mm->context.flush_mm = 1;
tlb->freed_tables = 1;
- tlb->cleared_puds = 1;
+ tlb->cleared_p4ds = 1;
tlb_remove_table(tlb, pud);
}
diff --git a/arch/s390/include/asm/uaccess.h b/arch/s390/include/asm/uaccess.h
index c6707885e7c2..4756d2937e54 100644
--- a/arch/s390/include/asm/uaccess.h
+++ b/arch/s390/include/asm/uaccess.h
@@ -18,7 +18,7 @@
#include <asm/extable.h>
#include <asm/facility.h>
-void debug_user_asce(void);
+void debug_user_asce(int exit);
static inline int __range_ok(unsigned long addr, unsigned long size)
{
diff --git a/arch/s390/include/asm/vdso.h b/arch/s390/include/asm/vdso.h
index f65590889054..b45e3dddd2c2 100644
--- a/arch/s390/include/asm/vdso.h
+++ b/arch/s390/include/asm/vdso.h
@@ -4,17 +4,18 @@
#include <vdso/datapage.h>
-/* Default link addresses for the vDSOs */
-#define VDSO32_LBASE 0
+/* Default link address for the vDSO */
#define VDSO64_LBASE 0
+#define __VVAR_PAGES 2
+
#define VDSO_VERSION_STRING LINUX_2.6.29
#ifndef __ASSEMBLY__
extern struct vdso_data *vdso_data;
-void vdso_getcpu_init(void);
+int vdso_getcpu_init(void);
#endif /* __ASSEMBLY__ */
#endif /* __S390_VDSO_H__ */
diff --git a/arch/s390/include/asm/vdso/gettimeofday.h b/arch/s390/include/asm/vdso/gettimeofday.h
index bf123065ad3b..ed89ef742530 100644
--- a/arch/s390/include/asm/vdso/gettimeofday.h
+++ b/arch/s390/include/asm/vdso/gettimeofday.h
@@ -24,13 +24,12 @@ static __always_inline const struct vdso_data *__arch_get_vdso_data(void)
static inline u64 __arch_get_hw_counter(s32 clock_mode, const struct vdso_data *vd)
{
- const struct vdso_data *vdso = __arch_get_vdso_data();
u64 adj, now;
now = get_tod_clock();
- adj = vdso->arch_data.tod_steering_end - now;
+ adj = vd->arch_data.tod_steering_end - now;
if (unlikely((s64) adj > 0))
- now += (vdso->arch_data.tod_steering_delta < 0) ? (adj >> 15) : -(adj >> 15);
+ now += (vd->arch_data.tod_steering_delta < 0) ? (adj >> 15) : -(adj >> 15);
return now;
}
@@ -68,4 +67,11 @@ long clock_getres_fallback(clockid_t clkid, struct __kernel_timespec *ts)
return r2;
}
+#ifdef CONFIG_TIME_NS
+static __always_inline const struct vdso_data *__arch_get_timens_vdso_data(void)
+{
+ return _timens_data;
+}
+#endif
+
#endif
diff --git a/arch/s390/include/asm/vtime.h b/arch/s390/include/asm/vtime.h
index fac6a67988eb..fe17e448c0c5 100644
--- a/arch/s390/include/asm/vtime.h
+++ b/arch/s390/include/asm/vtime.h
@@ -4,4 +4,18 @@
#define __ARCH_HAS_VTIME_TASK_SWITCH
+static inline void update_timer_sys(void)
+{
+ S390_lowcore.system_timer += S390_lowcore.last_update_timer - S390_lowcore.exit_timer;
+ S390_lowcore.user_timer += S390_lowcore.exit_timer - S390_lowcore.sys_enter_timer;
+ S390_lowcore.last_update_timer = S390_lowcore.sys_enter_timer;
+}
+
+static inline void update_timer_mcck(void)
+{
+ S390_lowcore.system_timer += S390_lowcore.last_update_timer - S390_lowcore.exit_timer;
+ S390_lowcore.user_timer += S390_lowcore.exit_timer - S390_lowcore.mcck_enter_timer;
+ S390_lowcore.last_update_timer = S390_lowcore.mcck_enter_timer;
+}
+
#endif /* _S390_VTIME_H */
diff --git a/arch/s390/include/uapi/asm/ptrace.h b/arch/s390/include/uapi/asm/ptrace.h
index 543dd70e12c8..ad64d673b5e6 100644
--- a/arch/s390/include/uapi/asm/ptrace.h
+++ b/arch/s390/include/uapi/asm/ptrace.h
@@ -179,8 +179,9 @@
#define ACR_SIZE 4
-#define PTRACE_OLDSETOPTIONS 21
-
+#define PTRACE_OLDSETOPTIONS 21
+#define PTRACE_SYSEMU 31
+#define PTRACE_SYSEMU_SINGLESTEP 32
#ifndef __ASSEMBLY__
#include <linux/stddef.h>
#include <linux/types.h>
diff --git a/arch/s390/kernel/Makefile b/arch/s390/kernel/Makefile
index dd73b7f07423..c97818a382f3 100644
--- a/arch/s390/kernel/Makefile
+++ b/arch/s390/kernel/Makefile
@@ -34,7 +34,7 @@ CFLAGS_dumpstack.o += -fno-optimize-sibling-calls
CFLAGS_unwind_bc.o += -fno-optimize-sibling-calls
obj-y := traps.o time.o process.o base.o early.o setup.o idle.o vtime.o
-obj-y += processor.o sys_s390.o ptrace.o signal.o cpcmd.o ebcdic.o nmi.o
+obj-y += processor.o syscall.o ptrace.o signal.o cpcmd.o ebcdic.o nmi.o
obj-y += debug.o irq.o ipl.o dis.o diag.o vdso.o
obj-y += sysinfo.o lgr.o os_info.o machine_kexec.o pgm_check.o
obj-y += runtime_instr.o cache.o fpu.o dumpstack.o guarded_storage.o sthyi.o
diff --git a/arch/s390/kernel/asm-offsets.c b/arch/s390/kernel/asm-offsets.c
index 79724d861dc9..15e637728a4b 100644
--- a/arch/s390/kernel/asm-offsets.c
+++ b/arch/s390/kernel/asm-offsets.c
@@ -26,26 +26,14 @@ int main(void)
BLANK();
/* thread struct offsets */
OFFSET(__THREAD_ksp, thread_struct, ksp);
- OFFSET(__THREAD_sysc_table, thread_struct, sys_call_table);
- OFFSET(__THREAD_last_break, thread_struct, last_break);
- OFFSET(__THREAD_FPU_fpc, thread_struct, fpu.fpc);
- OFFSET(__THREAD_FPU_regs, thread_struct, fpu.regs);
- OFFSET(__THREAD_per_cause, thread_struct, per_event.cause);
- OFFSET(__THREAD_per_address, thread_struct, per_event.address);
- OFFSET(__THREAD_per_paid, thread_struct, per_event.paid);
- OFFSET(__THREAD_trap_tdb, thread_struct, trap_tdb);
BLANK();
/* thread info offsets */
OFFSET(__TI_flags, task_struct, thread_info.flags);
BLANK();
/* pt_regs offsets */
- OFFSET(__PT_ARGS, pt_regs, args);
OFFSET(__PT_PSW, pt_regs, psw);
OFFSET(__PT_GPRS, pt_regs, gprs);
OFFSET(__PT_ORIG_GPR2, pt_regs, orig_gpr2);
- OFFSET(__PT_INT_CODE, pt_regs, int_code);
- OFFSET(__PT_INT_PARM, pt_regs, int_parm);
- OFFSET(__PT_INT_PARM_LONG, pt_regs, int_parm_long);
OFFSET(__PT_FLAGS, pt_regs, flags);
OFFSET(__PT_CR1, pt_regs, cr1);
DEFINE(__PT_SIZE, sizeof(struct pt_regs));
@@ -64,6 +52,7 @@ int main(void)
OFFSET(__CLOCK_IDLE_EXIT, s390_idle_data, clock_idle_exit);
OFFSET(__TIMER_IDLE_ENTER, s390_idle_data, timer_idle_enter);
OFFSET(__TIMER_IDLE_EXIT, s390_idle_data, timer_idle_exit);
+ OFFSET(__MT_CYCLES_ENTER, s390_idle_data, mt_cycles_enter);
BLANK();
/* hardware defined lowcore locations 0x000 - 0x1ff */
OFFSET(__LC_EXT_PARAMS, lowcore, ext_params);
@@ -115,13 +104,9 @@ int main(void)
OFFSET(__LC_CPU_FLAGS, lowcore, cpu_flags);
OFFSET(__LC_RETURN_PSW, lowcore, return_psw);
OFFSET(__LC_RETURN_MCCK_PSW, lowcore, return_mcck_psw);
- OFFSET(__LC_SYNC_ENTER_TIMER, lowcore, sync_enter_timer);
- OFFSET(__LC_ASYNC_ENTER_TIMER, lowcore, async_enter_timer);
+ OFFSET(__LC_SYS_ENTER_TIMER, lowcore, sys_enter_timer);
OFFSET(__LC_MCCK_ENTER_TIMER, lowcore, mcck_enter_timer);
OFFSET(__LC_EXIT_TIMER, lowcore, exit_timer);
- OFFSET(__LC_USER_TIMER, lowcore, user_timer);
- OFFSET(__LC_SYSTEM_TIMER, lowcore, system_timer);
- OFFSET(__LC_STEAL_TIMER, lowcore, steal_timer);
OFFSET(__LC_LAST_UPDATE_TIMER, lowcore, last_update_timer);
OFFSET(__LC_LAST_UPDATE_CLOCK, lowcore, last_update_clock);
OFFSET(__LC_INT_CLOCK, lowcore, int_clock);
@@ -133,6 +118,7 @@ int main(void)
OFFSET(__LC_ASYNC_STACK, lowcore, async_stack);
OFFSET(__LC_NODAT_STACK, lowcore, nodat_stack);
OFFSET(__LC_RESTART_STACK, lowcore, restart_stack);
+ OFFSET(__LC_MCCK_STACK, lowcore, mcck_stack);
OFFSET(__LC_RESTART_FN, lowcore, restart_fn);
OFFSET(__LC_RESTART_DATA, lowcore, restart_data);
OFFSET(__LC_RESTART_SOURCE, lowcore, restart_source);
diff --git a/arch/s390/kernel/compat_signal.c b/arch/s390/kernel/compat_signal.c
index 38d4bdbc34b9..1d0e17ec93eb 100644
--- a/arch/s390/kernel/compat_signal.c
+++ b/arch/s390/kernel/compat_signal.c
@@ -118,6 +118,7 @@ static int restore_sigregs32(struct pt_regs *regs,_sigregs32 __user *sregs)
fpregs_load((_s390_fp_regs *) &user_sregs.fpregs, &current->thread.fpu);
clear_pt_regs_flag(regs, PIF_SYSCALL); /* No longer in a system call */
+ clear_pt_regs_flag(regs, PIF_SYSCALL_RESTART);
return 0;
}
diff --git a/arch/s390/kernel/debug.c b/arch/s390/kernel/debug.c
index b6619ae9a3e0..bb958d32bd81 100644
--- a/arch/s390/kernel/debug.c
+++ b/arch/s390/kernel/debug.c
@@ -829,11 +829,11 @@ static inline debug_entry_t *get_active_entry(debug_info_t *id)
static inline void debug_finish_entry(debug_info_t *id, debug_entry_t *active,
int level, int exception)
{
- unsigned char clk[STORE_CLOCK_EXT_SIZE];
unsigned long timestamp;
+ union tod_clock clk;
- get_tod_clock_ext(clk);
- timestamp = *(unsigned long *) &clk[0] >> 4;
+ store_tod_clock_ext(&clk);
+ timestamp = clk.us;
timestamp -= TOD_UNIX_EPOCH >> 12;
active->clock = timestamp;
active->cpu = smp_processor_id();
diff --git a/arch/s390/kernel/early.c b/arch/s390/kernel/early.c
index cc89763a4d3c..a361d2e70025 100644
--- a/arch/s390/kernel/early.c
+++ b/arch/s390/kernel/early.c
@@ -35,16 +35,16 @@
static void __init reset_tod_clock(void)
{
- u64 time;
+ union tod_clock clk;
- if (store_tod_clock(&time) == 0)
+ if (store_tod_clock_ext_cc(&clk) == 0)
return;
/* TOD clock not running. Set the clock to Unix Epoch. */
- if (set_tod_clock(TOD_UNIX_EPOCH) != 0 || store_tod_clock(&time) != 0)
+ if (set_tod_clock(TOD_UNIX_EPOCH) || store_tod_clock_ext_cc(&clk))
disabled_wait();
- memset(tod_clock_base, 0, 16);
- *(__u64 *) &tod_clock_base[1] = TOD_UNIX_EPOCH;
+ memset(&tod_clock_base, 0, sizeof(tod_clock_base));
+ tod_clock_base.tod = TOD_UNIX_EPOCH;
S390_lowcore.last_update_clock = TOD_UNIX_EPOCH;
}
@@ -230,7 +230,7 @@ static __init void detect_machine_facilities(void)
}
if (test_facility(133))
S390_lowcore.machine_flags |= MACHINE_FLAG_GS;
- if (test_facility(139) && (tod_clock_base[1] & 0x80)) {
+ if (test_facility(139) && (tod_clock_base.tod >> 63)) {
/* Enabled signed clock comparator comparisons */
S390_lowcore.machine_flags |= MACHINE_FLAG_SCC;
clock_comparator_max = -1ULL >> 1;
diff --git a/arch/s390/kernel/entry.S b/arch/s390/kernel/entry.S
index f1ba197b10c0..c10b9f31eef7 100644
--- a/arch/s390/kernel/entry.S
+++ b/arch/s390/kernel/entry.S
@@ -51,38 +51,8 @@ STACK_SHIFT = PAGE_SHIFT + THREAD_SIZE_ORDER
STACK_SIZE = 1 << STACK_SHIFT
STACK_INIT = STACK_SIZE - STACK_FRAME_OVERHEAD - __PT_SIZE
-_TIF_WORK = (_TIF_SIGPENDING | _TIF_NOTIFY_RESUME | _TIF_NEED_RESCHED | \
- _TIF_UPROBE | _TIF_GUARDED_STORAGE | _TIF_PATCH_PENDING | \
- _TIF_NOTIFY_SIGNAL)
-_TIF_TRACE = (_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT | _TIF_SECCOMP | \
- _TIF_SYSCALL_TRACEPOINT)
-_CIF_WORK = (_CIF_FPU)
-_PIF_WORK = (_PIF_PER_TRAP | _PIF_SYSCALL_RESTART)
-
_LPP_OFFSET = __LC_LPP
- .macro TRACE_IRQS_ON
-#ifdef CONFIG_TRACE_IRQFLAGS
- basr %r2,%r0
- brasl %r14,trace_hardirqs_on_caller
-#endif
- .endm
-
- .macro TRACE_IRQS_OFF
-#ifdef CONFIG_TRACE_IRQFLAGS
- basr %r2,%r0
- brasl %r14,trace_hardirqs_off_caller
-#endif
- .endm
-
- .macro LOCKDEP_SYS_EXIT
-#ifdef CONFIG_LOCKDEP
- tm __PT_PSW+1(%r11),0x01 # returning to user ?
- jz .+10
- brasl %r14,lockdep_sys_exit
-#endif
- .endm
-
.macro CHECK_STACK savearea
#ifdef CONFIG_CHECK_STACK
tml %r15,STACK_SIZE - CONFIG_STACK_GUARD
@@ -91,12 +61,6 @@ _LPP_OFFSET = __LC_LPP
#endif
.endm
- .macro DEBUG_USER_ASCE
-#ifdef CONFIG_DEBUG_USER_ASCE
- brasl %r14,debug_user_asce
-#endif
- .endm
-
.macro CHECK_VMAP_STACK savearea,oklabel
#ifdef CONFIG_VMAP_STACK
lgr %r14,%r15
@@ -106,6 +70,8 @@ _LPP_OFFSET = __LC_LPP
je \oklabel
clg %r14,__LC_ASYNC_STACK
je \oklabel
+ clg %r14,__LC_MCCK_STACK
+ je \oklabel
clg %r14,__LC_NODAT_STACK
je \oklabel
clg %r14,__LC_RESTART_STACK
@@ -117,113 +83,9 @@ _LPP_OFFSET = __LC_LPP
#endif
.endm
- .macro SWITCH_ASYNC savearea,timer,clock
- tmhh %r8,0x0001 # interrupting from user ?
- jnz 4f
-#if IS_ENABLED(CONFIG_KVM)
- lgr %r14,%r9
- larl %r13,.Lsie_gmap
- slgr %r14,%r13
- lghi %r13,.Lsie_done - .Lsie_gmap
- clgr %r14,%r13
- jhe 0f
- lghi %r11,\savearea # inside critical section, do cleanup
- brasl %r14,.Lcleanup_sie
-#endif
-0: larl %r13,.Lpsw_idle_exit
- cgr %r13,%r9
- jne 3f
-
- larl %r1,smp_cpu_mtid
- llgf %r1,0(%r1)
- ltgr %r1,%r1
- jz 2f # no SMT, skip mt_cycles calculation
- .insn rsy,0xeb0000000017,%r1,5,__SF_EMPTY+80(%r15)
- larl %r3,mt_cycles
- ag %r3,__LC_PERCPU_OFFSET
- la %r4,__SF_EMPTY+16(%r15)
-1: lg %r0,0(%r3)
- slg %r0,0(%r4)
- alg %r0,64(%r4)
- stg %r0,0(%r3)
- la %r3,8(%r3)
- la %r4,8(%r4)
- brct %r1,1b
-
-2: mvc __CLOCK_IDLE_EXIT(8,%r2), \clock
- mvc __TIMER_IDLE_EXIT(8,%r2), \timer
- # account system time going idle
- ni __LC_CPU_FLAGS+7,255-_CIF_ENABLED_WAIT
-
- lg %r13,__LC_STEAL_TIMER
- alg %r13,__CLOCK_IDLE_ENTER(%r2)
- slg %r13,__LC_LAST_UPDATE_CLOCK
- stg %r13,__LC_STEAL_TIMER
-
- mvc __LC_LAST_UPDATE_CLOCK(8),__CLOCK_IDLE_EXIT(%r2)
-
- lg %r13,__LC_SYSTEM_TIMER
- alg %r13,__LC_LAST_UPDATE_TIMER
- slg %r13,__TIMER_IDLE_ENTER(%r2)
- stg %r13,__LC_SYSTEM_TIMER
- mvc __LC_LAST_UPDATE_TIMER(8),__TIMER_IDLE_EXIT(%r2)
-
- nihh %r8,0xfcfd # clear wait state and irq bits
-3: lg %r14,__LC_ASYNC_STACK # are we already on the target stack?
- slgr %r14,%r15
- srag %r14,%r14,STACK_SHIFT
- jnz 5f
- CHECK_STACK \savearea
- aghi %r15,-(STACK_FRAME_OVERHEAD + __PT_SIZE)
- j 6f
-4: UPDATE_VTIME %r14,%r15,\timer
- BPENTER __TI_flags(%r12),_TIF_ISOLATE_BP
-5: lg %r15,__LC_ASYNC_STACK # load async stack
-6: la %r11,STACK_FRAME_OVERHEAD(%r15)
- .endm
-
- .macro UPDATE_VTIME w1,w2,enter_timer
- lg \w1,__LC_EXIT_TIMER
- lg \w2,__LC_LAST_UPDATE_TIMER
- slg \w1,\enter_timer
- slg \w2,__LC_EXIT_TIMER
- alg \w1,__LC_USER_TIMER
- alg \w2,__LC_SYSTEM_TIMER
- stg \w1,__LC_USER_TIMER
- stg \w2,__LC_SYSTEM_TIMER
- mvc __LC_LAST_UPDATE_TIMER(8),\enter_timer
- .endm
-
- .macro RESTORE_SM_CLEAR_PER
- stg %r8,__LC_RETURN_PSW
- ni __LC_RETURN_PSW,0xbf
- ssm __LC_RETURN_PSW
- .endm
-
- .macro ENABLE_INTS
- stosm __SF_EMPTY(%r15),3
- .endm
-
- .macro ENABLE_INTS_TRACE
- TRACE_IRQS_ON
- ENABLE_INTS
- .endm
-
- .macro DISABLE_INTS
- stnsm __SF_EMPTY(%r15),0xfc
- .endm
-
- .macro DISABLE_INTS_TRACE
- DISABLE_INTS
- TRACE_IRQS_OFF
- .endm
-
.macro STCK savearea
-#ifdef CONFIG_HAVE_MARCH_Z9_109_FEATURES
- .insn s,0xb27c0000,\savearea # store clock fast
-#else
- .insn s,0xb2050000,\savearea # store clock
-#endif
+ ALTERNATIVE ".insn s,0xb2050000,\savearea", \
+ ".insn s,0xb27c0000,\savearea", 25
.endm
/*
@@ -267,18 +129,17 @@ _LPP_OFFSET = __LC_LPP
"jnz .+8; .long 0xb2e8d000", 82
.endm
- GEN_BR_THUNK %r9
GEN_BR_THUNK %r14
- GEN_BR_THUNK %r14,%r11
+ GEN_BR_THUNK %r14,%r13
.section .kprobes.text, "ax"
.Ldummy:
/*
- * This nop exists only in order to avoid that __switch_to starts at
+ * This nop exists only in order to avoid that __bpon starts at
* the beginning of the kprobes text section. In that case we would
* have several symbols at the same address. E.g. objdump would take
* an arbitrary symbol name when disassembling this code.
- * With the added nop in between the __switch_to symbol is unique
+ * With the added nop in between the __bpon symbol is unique
* again.
*/
nop 0
@@ -327,10 +188,6 @@ ENTRY(sie64a)
stg %r3,__SF_SIE_SAVEAREA(%r15) # save guest register save area
xc __SF_SIE_REASON(8,%r15),__SF_SIE_REASON(%r15) # reason code = 0
mvc __SF_SIE_FLAGS(8,%r15),__TI_flags(%r12) # copy thread flags
- TSTMSK __LC_CPU_FLAGS,_CIF_FPU # load guest fp/vx registers ?
- jno .Lsie_load_guest_gprs
- brasl %r14,load_fpu_regs # load guest fp/vx regs
-.Lsie_load_guest_gprs:
lmg %r0,%r13,0(%r3) # load guest gprs 0-13
lg %r14,__LC_GMAP # get gmap pointer
ltgr %r14,%r14
@@ -357,7 +214,7 @@ ENTRY(sie64a)
# are some corner cases (e.g. runtime instrumentation) where ILC is unpredictable.
# Other instructions between sie64a and .Lsie_done should not cause program
# interrupts. So lets use 3 nops as a landing pad for all possible rewinds.
-# See also .Lcleanup_sie
+# See also .Lcleanup_sie_mcck/.Lcleanup_sie_int
.Lrewind_pad6:
nopr 7
.Lrewind_pad4:
@@ -370,7 +227,6 @@ sie_exit:
stmg %r0,%r13,0(%r14) # save guest gprs 0-13
xgr %r0,%r0 # clear guest registers to
xgr %r1,%r1 # prevent speculative use
- xgr %r2,%r2
xgr %r3,%r3
xgr %r4,%r4
xgr %r5,%r5
@@ -397,249 +253,68 @@ EXPORT_SYMBOL(sie_exit)
*/
ENTRY(system_call)
- stpt __LC_SYNC_ENTER_TIMER
+ stpt __LC_SYS_ENTER_TIMER
stmg %r8,%r15,__LC_SAVE_AREA_SYNC
BPOFF
- lg %r12,__LC_CURRENT
- lghi %r14,_PIF_SYSCALL
+ lghi %r14,0
.Lsysc_per:
lctlg %c1,%c1,__LC_KERNEL_ASCE
- lghi %r13,__TASK_thread
+ lg %r12,__LC_CURRENT
lg %r15,__LC_KERNEL_STACK
- la %r11,STACK_FRAME_OVERHEAD(%r15) # pointer to pt_regs
- UPDATE_VTIME %r8,%r9,__LC_SYNC_ENTER_TIMER
- BPENTER __TI_flags(%r12),_TIF_ISOLATE_BP
- stmg %r0,%r7,__PT_R0(%r11)
- mvc __PT_R8(64,%r11),__LC_SAVE_AREA_SYNC
- mvc __PT_PSW(16,%r11),__LC_SVC_OLD_PSW
- mvc __PT_INT_CODE(4,%r11),__LC_SVC_ILC
- stg %r14,__PT_FLAGS(%r11)
xc __SF_BACKCHAIN(8,%r15),__SF_BACKCHAIN(%r15)
- ENABLE_INTS
-.Lsysc_do_svc:
+ stmg %r0,%r7,STACK_FRAME_OVERHEAD+__PT_R0(%r15)
+ BPENTER __TI_flags(%r12),_TIF_ISOLATE_BP
# clear user controlled register to prevent speculative use
xgr %r0,%r0
- # load address of system call table
- lg %r10,__THREAD_sysc_table(%r13,%r12)
- llgh %r8,__PT_INT_CODE+2(%r11)
- slag %r8,%r8,3 # shift and test for svc 0
- jnz .Lsysc_nr_ok
- # svc 0: system call number in %r1
- llgfr %r1,%r1 # clear high word in r1
- sth %r1,__PT_INT_CODE+2(%r11)
- cghi %r1,NR_syscalls
- jnl .Lsysc_nr_ok
- slag %r8,%r1,3
-.Lsysc_nr_ok:
- stg %r2,__PT_ORIG_GPR2(%r11)
- stg %r7,STACK_FRAME_OVERHEAD(%r15)
- lg %r9,0(%r8,%r10) # get system call add.
- TSTMSK __TI_flags(%r12),_TIF_TRACE
- jnz .Lsysc_tracesys
- BASR_EX %r14,%r9 # call sys_xxxx
- stg %r2,__PT_R2(%r11) # store return value
-
-.Lsysc_return:
-#ifdef CONFIG_DEBUG_RSEQ
- lgr %r2,%r11
- brasl %r14,rseq_syscall
-#endif
- LOCKDEP_SYS_EXIT
-.Lsysc_tif:
- DISABLE_INTS
- TSTMSK __PT_FLAGS(%r11),_PIF_WORK
- jnz .Lsysc_work
- TSTMSK __TI_flags(%r12),_TIF_WORK
- jnz .Lsysc_work # check for work
- DEBUG_USER_ASCE
+ xgr %r1,%r1
+ xgr %r4,%r4
+ xgr %r5,%r5
+ xgr %r6,%r6
+ xgr %r7,%r7
+ xgr %r8,%r8
+ xgr %r9,%r9
+ xgr %r10,%r10
+ xgr %r11,%r11
+ la %r2,STACK_FRAME_OVERHEAD(%r15) # pointer to pt_regs
+ lgr %r3,%r14
+ brasl %r14,__do_syscall
lctlg %c1,%c1,__LC_USER_ASCE
- BPEXIT __TI_flags(%r12),_TIF_ISOLATE_BP
- TSTMSK __LC_CPU_FLAGS, _CIF_FPU
- jz .Lsysc_skip_fpu
- brasl %r14,load_fpu_regs
-.Lsysc_skip_fpu:
- mvc __LC_RETURN_PSW(16),__PT_PSW(%r11)
+ mvc __LC_RETURN_PSW(16),STACK_FRAME_OVERHEAD+__PT_PSW(%r15)
+ BPEXIT __TI_flags(%r12),_TIF_ISOLATE_BP
+ lmg %r0,%r15,STACK_FRAME_OVERHEAD+__PT_R0(%r15)
stpt __LC_EXIT_TIMER
- lmg %r0,%r15,__PT_R0(%r11)
b __LC_RETURN_LPSWE
-
-#
-# One of the work bits is on. Find out which one.
-#
-.Lsysc_work:
- ENABLE_INTS
- TSTMSK __TI_flags(%r12),_TIF_NEED_RESCHED
- jo .Lsysc_reschedule
- TSTMSK __PT_FLAGS(%r11),_PIF_SYSCALL_RESTART
- jo .Lsysc_syscall_restart
-#ifdef CONFIG_UPROBES
- TSTMSK __TI_flags(%r12),_TIF_UPROBE
- jo .Lsysc_uprobe_notify
-#endif
- TSTMSK __TI_flags(%r12),_TIF_GUARDED_STORAGE
- jo .Lsysc_guarded_storage
- TSTMSK __PT_FLAGS(%r11),_PIF_PER_TRAP
- jo .Lsysc_singlestep
-#ifdef CONFIG_LIVEPATCH
- TSTMSK __TI_flags(%r12),_TIF_PATCH_PENDING
- jo .Lsysc_patch_pending # handle live patching just before
- # signals and possible syscall restart
-#endif
- TSTMSK __PT_FLAGS(%r11),_PIF_SYSCALL_RESTART
- jo .Lsysc_syscall_restart
- TSTMSK __TI_flags(%r12),(_TIF_SIGPENDING|_TIF_NOTIFY_SIGNAL)
- jnz .Lsysc_sigpending
- TSTMSK __TI_flags(%r12),_TIF_NOTIFY_RESUME
- jo .Lsysc_notify_resume
- j .Lsysc_return
-
-#
-# _TIF_NEED_RESCHED is set, call schedule
-#
-.Lsysc_reschedule:
- larl %r14,.Lsysc_return
- jg schedule
-
-#
-# _TIF_SIGPENDING is set, call do_signal
-#
-.Lsysc_sigpending:
- lgr %r2,%r11 # pass pointer to pt_regs
- brasl %r14,do_signal
- TSTMSK __PT_FLAGS(%r11),_PIF_SYSCALL
- jno .Lsysc_return
-.Lsysc_do_syscall:
- lghi %r13,__TASK_thread
- lmg %r2,%r7,__PT_R2(%r11) # load svc arguments
- lghi %r1,0 # svc 0 returns -ENOSYS
- j .Lsysc_do_svc
-
-#
-# _TIF_NOTIFY_RESUME is set, call do_notify_resume
-#
-.Lsysc_notify_resume:
- lgr %r2,%r11 # pass pointer to pt_regs
- larl %r14,.Lsysc_return
- jg do_notify_resume
-
-#
-# _TIF_UPROBE is set, call uprobe_notify_resume
-#
-#ifdef CONFIG_UPROBES
-.Lsysc_uprobe_notify:
- lgr %r2,%r11 # pass pointer to pt_regs
- larl %r14,.Lsysc_return
- jg uprobe_notify_resume
-#endif
-
-#
-# _TIF_GUARDED_STORAGE is set, call guarded_storage_load
-#
-.Lsysc_guarded_storage:
- lgr %r2,%r11 # pass pointer to pt_regs
- larl %r14,.Lsysc_return
- jg gs_load_bc_cb
-#
-# _TIF_PATCH_PENDING is set, call klp_update_patch_state
-#
-#ifdef CONFIG_LIVEPATCH
-.Lsysc_patch_pending:
- lg %r2,__LC_CURRENT # pass pointer to task struct
- larl %r14,.Lsysc_return
- jg klp_update_patch_state
-#endif
-
-#
-# _PIF_PER_TRAP is set, call do_per_trap
-#
-.Lsysc_singlestep:
- ni __PT_FLAGS+7(%r11),255-_PIF_PER_TRAP
- lgr %r2,%r11 # pass pointer to pt_regs
- larl %r14,.Lsysc_return
- jg do_per_trap
-
-#
-# _PIF_SYSCALL_RESTART is set, repeat the current system call
-#
-.Lsysc_syscall_restart:
- ni __PT_FLAGS+7(%r11),255-_PIF_SYSCALL_RESTART
- lmg %r1,%r7,__PT_R1(%r11) # load svc arguments
- lg %r2,__PT_ORIG_GPR2(%r11)
- j .Lsysc_do_svc
-
-#
-# call tracehook_report_syscall_entry/tracehook_report_syscall_exit before
-# and after the system call
-#
-.Lsysc_tracesys:
- lgr %r2,%r11 # pass pointer to pt_regs
- la %r3,0
- llgh %r0,__PT_INT_CODE+2(%r11)
- stg %r0,__PT_R2(%r11)
- brasl %r14,do_syscall_trace_enter
- lghi %r0,NR_syscalls
- clgr %r0,%r2
- jnh .Lsysc_tracenogo
- sllg %r8,%r2,3
- lg %r9,0(%r8,%r10)
- lmg %r3,%r7,__PT_R3(%r11)
- stg %r7,STACK_FRAME_OVERHEAD(%r15)
- lg %r2,__PT_ORIG_GPR2(%r11)
- BASR_EX %r14,%r9 # call sys_xxx
- stg %r2,__PT_R2(%r11) # store return value
-.Lsysc_tracenogo:
- TSTMSK __TI_flags(%r12),_TIF_TRACE
- jz .Lsysc_return
- lgr %r2,%r11 # pass pointer to pt_regs
- larl %r14,.Lsysc_return
- jg do_syscall_trace_exit
ENDPROC(system_call)
#
# a new process exits the kernel with ret_from_fork
#
ENTRY(ret_from_fork)
- la %r11,STACK_FRAME_OVERHEAD(%r15)
- lg %r12,__LC_CURRENT
- brasl %r14,schedule_tail
- tm __PT_PSW+1(%r11),0x01 # forking a kernel thread ?
- jne .Lsysc_tracenogo
- # it's a kernel thread
- lmg %r9,%r10,__PT_R9(%r11) # load gprs
- la %r2,0(%r10)
- BASR_EX %r14,%r9
- j .Lsysc_tracenogo
+ lgr %r3,%r11
+ brasl %r14,__ret_from_fork
+ lctlg %c1,%c1,__LC_USER_ASCE
+ mvc __LC_RETURN_PSW(16),STACK_FRAME_OVERHEAD+__PT_PSW(%r15)
+ BPEXIT __TI_flags(%r12),_TIF_ISOLATE_BP
+ lmg %r0,%r15,STACK_FRAME_OVERHEAD+__PT_R0(%r15)
+ stpt __LC_EXIT_TIMER
+ b __LC_RETURN_LPSWE
ENDPROC(ret_from_fork)
-ENTRY(kernel_thread_starter)
- la %r2,0(%r10)
- BASR_EX %r14,%r9
- j .Lsysc_tracenogo
-ENDPROC(kernel_thread_starter)
-
/*
* Program check handler routine
*/
ENTRY(pgm_check_handler)
- stpt __LC_SYNC_ENTER_TIMER
+ stpt __LC_SYS_ENTER_TIMER
BPOFF
stmg %r8,%r15,__LC_SAVE_AREA_SYNC
- lg %r10,__LC_LAST_BREAK
- srag %r11,%r10,12
- jnz 0f
- /* if __LC_LAST_BREAK is < 4096, it contains one of
- * the lpswe addresses in lowcore. Set it to 1 (initial state)
- * to prevent leaking that address to userspace.
- */
- lghi %r10,1
-0: lg %r12,__LC_CURRENT
- lghi %r11,0
+ lg %r12,__LC_CURRENT
+ lghi %r10,0
lmg %r8,%r9,__LC_PGM_OLD_PSW
tmhh %r8,0x0001 # coming from user space?
jno .Lpgm_skip_asce
lctlg %c1,%c1,__LC_KERNEL_ASCE
- j 3f
+ j 3f # -> fault in user space
.Lpgm_skip_asce:
#if IS_ENABLED(CONFIG_KVM)
# cleanup critical section for program checks in sie64a
@@ -653,7 +328,7 @@ ENTRY(pgm_check_handler)
ni __SIE_PROG0C+3(%r14),0xfe # no longer in SIE
lctlg %c1,%c1,__LC_KERNEL_ASCE # load primary asce
larl %r9,sie_exit # skip forward to sie_exit
- lghi %r11,_PIF_GUEST_FAULT
+ lghi %r10,_PIF_GUEST_FAULT
#endif
1: tmhh %r8,0x4000 # PER bit set in old PSW ?
jnz 2f # -> enabled, can't be a double fault
@@ -661,109 +336,84 @@ ENTRY(pgm_check_handler)
jnz .Lpgm_svcper # -> single stepped svc
2: CHECK_STACK __LC_SAVE_AREA_SYNC
aghi %r15,-(STACK_FRAME_OVERHEAD + __PT_SIZE)
- # CHECK_VMAP_STACK branches to stack_overflow or 5f
- CHECK_VMAP_STACK __LC_SAVE_AREA_SYNC,5f
-3: UPDATE_VTIME %r14,%r15,__LC_SYNC_ENTER_TIMER
- BPENTER __TI_flags(%r12),_TIF_ISOLATE_BP
+ # CHECK_VMAP_STACK branches to stack_overflow or 4f
+ CHECK_VMAP_STACK __LC_SAVE_AREA_SYNC,4f
+3: BPENTER __TI_flags(%r12),_TIF_ISOLATE_BP
lg %r15,__LC_KERNEL_STACK
- lgr %r14,%r12
- aghi %r14,__TASK_thread # pointer to thread_struct
- lghi %r13,__LC_PGM_TDB
- tm __LC_PGM_ILC+2,0x02 # check for transaction abort
- jz 4f
- mvc __THREAD_trap_tdb(256,%r14),0(%r13)
-4: stg %r10,__THREAD_last_break(%r14)
-5: lgr %r13,%r11
- la %r11,STACK_FRAME_OVERHEAD(%r15)
+4: la %r11,STACK_FRAME_OVERHEAD(%r15)
+ stg %r10,__PT_FLAGS(%r11)
+ xc __SF_BACKCHAIN(8,%r15),__SF_BACKCHAIN(%r15)
stmg %r0,%r7,__PT_R0(%r11)
+ mvc __PT_R8(64,%r11),__LC_SAVE_AREA_SYNC
+ stmg %r8,%r9,__PT_PSW(%r11)
+
# clear user controlled registers to prevent speculative use
xgr %r0,%r0
xgr %r1,%r1
- xgr %r2,%r2
xgr %r3,%r3
xgr %r4,%r4
xgr %r5,%r5
xgr %r6,%r6
xgr %r7,%r7
- mvc __PT_R8(64,%r11),__LC_SAVE_AREA_SYNC
- stmg %r8,%r9,__PT_PSW(%r11)
- mvc __PT_INT_CODE(4,%r11),__LC_PGM_ILC
- mvc __PT_INT_PARM_LONG(8,%r11),__LC_TRANS_EXC_CODE
- stg %r13,__PT_FLAGS(%r11)
- stg %r10,__PT_ARGS(%r11)
- tm __LC_PGM_ILC+3,0x80 # check for per exception
- jz 6f
- tmhh %r8,0x0001 # kernel per event ?
- jz .Lpgm_kprobe
- oi __PT_FLAGS+7(%r11),_PIF_PER_TRAP
- mvc __THREAD_per_address(8,%r14),__LC_PER_ADDRESS
- mvc __THREAD_per_cause(2,%r14),__LC_PER_CODE
- mvc __THREAD_per_paid(1,%r14),__LC_PER_ACCESS_ID
-6: xc __SF_BACKCHAIN(8,%r15),__SF_BACKCHAIN(%r15)
- RESTORE_SM_CLEAR_PER
- larl %r1,pgm_check_table
- llgh %r10,__PT_INT_CODE+2(%r11)
- nill %r10,0x007f
- sll %r10,3
- je .Lpgm_return
- lg %r9,0(%r10,%r1) # load address of handler routine
- lgr %r2,%r11 # pass pointer to pt_regs
- BASR_EX %r14,%r9 # branch to interrupt-handler
-.Lpgm_return:
- LOCKDEP_SYS_EXIT
- tm __PT_PSW+1(%r11),0x01 # returning to user ?
- jno .Lpgm_restore
- TSTMSK __PT_FLAGS(%r11),_PIF_SYSCALL
- jo .Lsysc_do_syscall
- j .Lsysc_tif
-.Lpgm_restore:
- DISABLE_INTS
- TSTMSK __LC_CPU_FLAGS, _CIF_FPU
- jz .Lpgm_skip_fpu
- brasl %r14,load_fpu_regs
-.Lpgm_skip_fpu:
- mvc __LC_RETURN_PSW(16),__PT_PSW(%r11)
+ lgr %r2,%r11
+ brasl %r14,__do_pgm_check
+ tmhh %r8,0x0001 # returning to user space?
+ jno .Lpgm_exit_kernel
+ lctlg %c1,%c1,__LC_USER_ASCE
+ BPEXIT __TI_flags(%r12),_TIF_ISOLATE_BP
stpt __LC_EXIT_TIMER
- lmg %r0,%r15,__PT_R0(%r11)
+.Lpgm_exit_kernel:
+ mvc __LC_RETURN_PSW(16),STACK_FRAME_OVERHEAD+__PT_PSW(%r15)
+ lmg %r0,%r15,STACK_FRAME_OVERHEAD+__PT_R0(%r15)
b __LC_RETURN_LPSWE
#
-# PER event in supervisor state, must be kprobes
-#
-.Lpgm_kprobe:
- xc __SF_BACKCHAIN(8,%r15),__SF_BACKCHAIN(%r15)
- RESTORE_SM_CLEAR_PER
- lgr %r2,%r11 # pass pointer to pt_regs
- brasl %r14,do_per_trap
- j .Lpgm_return
-
-#
# single stepped system call
#
.Lpgm_svcper:
mvc __LC_RETURN_PSW(8),__LC_SVC_NEW_PSW
larl %r14,.Lsysc_per
stg %r14,__LC_RETURN_PSW+8
- lghi %r14,_PIF_SYSCALL | _PIF_PER_TRAP
+ lghi %r14,1
lpswe __LC_RETURN_PSW # branch to .Lsysc_per
ENDPROC(pgm_check_handler)
/*
- * IO interrupt handler routine
+ * Interrupt handler macro used for external and IO interrupts.
*/
-ENTRY(io_int_handler)
+.macro INT_HANDLER name,lc_old_psw,handler
+ENTRY(\name)
STCK __LC_INT_CLOCK
- stpt __LC_ASYNC_ENTER_TIMER
+ stpt __LC_SYS_ENTER_TIMER
BPOFF
stmg %r8,%r15,__LC_SAVE_AREA_ASYNC
lg %r12,__LC_CURRENT
- lmg %r8,%r9,__LC_IO_OLD_PSW
- SWITCH_ASYNC __LC_SAVE_AREA_ASYNC,__LC_ASYNC_ENTER_TIMER,__LC_INT_CLOCK
+ lmg %r8,%r9,\lc_old_psw
+ tmhh %r8,0x0001 # interrupting from user ?
+ jnz 1f
+#if IS_ENABLED(CONFIG_KVM)
+ lgr %r14,%r9
+ larl %r13,.Lsie_gmap
+ slgr %r14,%r13
+ lghi %r13,.Lsie_done - .Lsie_gmap
+ clgr %r14,%r13
+ jhe 0f
+ brasl %r14,.Lcleanup_sie_int
+#endif
+0: CHECK_STACK __LC_SAVE_AREA_ASYNC
+ lgr %r11,%r15
+ aghi %r15,-(STACK_FRAME_OVERHEAD + __PT_SIZE)
+ stg %r11,__SF_BACKCHAIN(%r15)
+ j 2f
+1: BPENTER __TI_flags(%r12),_TIF_ISOLATE_BP
+ lctlg %c1,%c1,__LC_KERNEL_ASCE
+ lg %r15,__LC_KERNEL_STACK
+ xc __SF_BACKCHAIN(8,%r15),__SF_BACKCHAIN(%r15)
+2: la %r11,STACK_FRAME_OVERHEAD(%r15)
stmg %r0,%r7,__PT_R0(%r11)
# clear user controlled registers to prevent speculative use
xgr %r0,%r0
xgr %r1,%r1
- xgr %r2,%r2
xgr %r3,%r3
xgr %r4,%r4
xgr %r5,%r5
@@ -772,323 +422,49 @@ ENTRY(io_int_handler)
xgr %r10,%r10
mvc __PT_R8(64,%r11),__LC_SAVE_AREA_ASYNC
stmg %r8,%r9,__PT_PSW(%r11)
- tm __PT_PSW+1(%r11),0x01 # coming from user space?
- jno .Lio_skip_asce
+ tm %r8,0x0001 # coming from user space?
+ jno 1f
lctlg %c1,%c1,__LC_KERNEL_ASCE
-.Lio_skip_asce:
- mvc __PT_INT_CODE(12,%r11),__LC_SUBCHANNEL_ID
- xc __PT_FLAGS(8,%r11),__PT_FLAGS(%r11)
- xc __SF_BACKCHAIN(8,%r15),__SF_BACKCHAIN(%r15)
- TRACE_IRQS_OFF
-.Lio_loop:
- lgr %r2,%r11 # pass pointer to pt_regs
- lghi %r3,IO_INTERRUPT
- tm __PT_INT_CODE+8(%r11),0x80 # adapter interrupt ?
- jz .Lio_call
- lghi %r3,THIN_INTERRUPT
-.Lio_call:
- brasl %r14,do_IRQ
- TSTMSK __LC_MACHINE_FLAGS,MACHINE_FLAG_LPAR
- jz .Lio_return
- tpi 0
- jz .Lio_return
- mvc __PT_INT_CODE(12,%r11),__LC_SUBCHANNEL_ID
- j .Lio_loop
-.Lio_return:
- LOCKDEP_SYS_EXIT
- TSTMSK __TI_flags(%r12),_TIF_WORK
- jnz .Lio_work # there is work to do (signals etc.)
- TSTMSK __LC_CPU_FLAGS,_CIF_WORK
- jnz .Lio_work
-.Lio_restore:
- TRACE_IRQS_ON
+1: lgr %r2,%r11 # pass pointer to pt_regs
+ brasl %r14,\handler
mvc __LC_RETURN_PSW(16),__PT_PSW(%r11)
- tm __PT_PSW+1(%r11),0x01 # returning to user ?
- jno .Lio_exit_kernel
- DEBUG_USER_ASCE
+ tmhh %r8,0x0001 # returning to user ?
+ jno 2f
lctlg %c1,%c1,__LC_USER_ASCE
BPEXIT __TI_flags(%r12),_TIF_ISOLATE_BP
stpt __LC_EXIT_TIMER
-.Lio_exit_kernel:
- lmg %r0,%r15,__PT_R0(%r11)
+2: lmg %r0,%r15,__PT_R0(%r11)
b __LC_RETURN_LPSWE
-.Lio_done:
+ENDPROC(\name)
+.endm
-#
-# There is work todo, find out in which context we have been interrupted:
-# 1) if we return to user space we can do all _TIF_WORK work
-# 2) if we return to kernel code and kvm is enabled check if we need to
-# modify the psw to leave SIE
-# 3) if we return to kernel code and preemptive scheduling is enabled check
-# the preemption counter and if it is zero call preempt_schedule_irq
-# Before any work can be done, a switch to the kernel stack is required.
-#
-.Lio_work:
- tm __PT_PSW+1(%r11),0x01 # returning to user ?
- jo .Lio_work_user # yes -> do resched & signal
-#ifdef CONFIG_PREEMPTION
- # check for preemptive scheduling
- icm %r0,15,__LC_PREEMPT_COUNT
- jnz .Lio_restore # preemption is disabled
- TSTMSK __TI_flags(%r12),_TIF_NEED_RESCHED
- jno .Lio_restore
- # switch to kernel stack
- lg %r1,__PT_R15(%r11)
- aghi %r1,-(STACK_FRAME_OVERHEAD + __PT_SIZE)
- mvc STACK_FRAME_OVERHEAD(__PT_SIZE,%r1),0(%r11)
- xc __SF_BACKCHAIN(8,%r1),__SF_BACKCHAIN(%r1)
- la %r11,STACK_FRAME_OVERHEAD(%r1)
- lgr %r15,%r1
- brasl %r14,preempt_schedule_irq
- j .Lio_return
-#else
- j .Lio_restore
-#endif
-
-#
-# Need to do work before returning to userspace, switch to kernel stack
-#
-.Lio_work_user:
- lg %r1,__LC_KERNEL_STACK
- mvc STACK_FRAME_OVERHEAD(__PT_SIZE,%r1),0(%r11)
- xc __SF_BACKCHAIN(8,%r1),__SF_BACKCHAIN(%r1)
- la %r11,STACK_FRAME_OVERHEAD(%r1)
- lgr %r15,%r1
-
-#
-# One of the work bits is on. Find out which one.
-#
- TSTMSK __TI_flags(%r12),_TIF_NEED_RESCHED
- jo .Lio_reschedule
-#ifdef CONFIG_LIVEPATCH
- TSTMSK __TI_flags(%r12),_TIF_PATCH_PENDING
- jo .Lio_patch_pending
-#endif
- TSTMSK __TI_flags(%r12),(_TIF_SIGPENDING|_TIF_NOTIFY_SIGNAL)
- jnz .Lio_sigpending
- TSTMSK __TI_flags(%r12),_TIF_NOTIFY_RESUME
- jo .Lio_notify_resume
- TSTMSK __TI_flags(%r12),_TIF_GUARDED_STORAGE
- jo .Lio_guarded_storage
- TSTMSK __LC_CPU_FLAGS,_CIF_FPU
- jo .Lio_vxrs
- j .Lio_return
-
-#
-# CIF_FPU is set, restore floating-point controls and floating-point registers.
-#
-.Lio_vxrs:
- larl %r14,.Lio_return
- jg load_fpu_regs
-
-#
-# _TIF_GUARDED_STORAGE is set, call guarded_storage_load
-#
-.Lio_guarded_storage:
- ENABLE_INTS_TRACE
- lgr %r2,%r11 # pass pointer to pt_regs
- brasl %r14,gs_load_bc_cb
- DISABLE_INTS_TRACE
- j .Lio_return
-
-#
-# _TIF_NEED_RESCHED is set, call schedule
-#
-.Lio_reschedule:
- ENABLE_INTS_TRACE
- brasl %r14,schedule # call scheduler
- DISABLE_INTS_TRACE
- j .Lio_return
-
-#
-# _TIF_PATCH_PENDING is set, call klp_update_patch_state
-#
-#ifdef CONFIG_LIVEPATCH
-.Lio_patch_pending:
- lg %r2,__LC_CURRENT # pass pointer to task struct
- larl %r14,.Lio_return
- jg klp_update_patch_state
-#endif
-
-#
-# _TIF_SIGPENDING or is set, call do_signal
-#
-.Lio_sigpending:
- ENABLE_INTS_TRACE
- lgr %r2,%r11 # pass pointer to pt_regs
- brasl %r14,do_signal
- DISABLE_INTS_TRACE
- j .Lio_return
-
-#
-# _TIF_NOTIFY_RESUME or is set, call do_notify_resume
-#
-.Lio_notify_resume:
- ENABLE_INTS_TRACE
- lgr %r2,%r11 # pass pointer to pt_regs
- brasl %r14,do_notify_resume
- DISABLE_INTS_TRACE
- j .Lio_return
-ENDPROC(io_int_handler)
-
-/*
- * External interrupt handler routine
- */
-ENTRY(ext_int_handler)
- STCK __LC_INT_CLOCK
- stpt __LC_ASYNC_ENTER_TIMER
- BPOFF
- stmg %r8,%r15,__LC_SAVE_AREA_ASYNC
- lg %r12,__LC_CURRENT
- lmg %r8,%r9,__LC_EXT_OLD_PSW
- SWITCH_ASYNC __LC_SAVE_AREA_ASYNC,__LC_ASYNC_ENTER_TIMER,__LC_INT_CLOCK
- stmg %r0,%r7,__PT_R0(%r11)
- # clear user controlled registers to prevent speculative use
- xgr %r0,%r0
- xgr %r1,%r1
- xgr %r2,%r2
- xgr %r3,%r3
- xgr %r4,%r4
- xgr %r5,%r5
- xgr %r6,%r6
- xgr %r7,%r7
- xgr %r10,%r10
- mvc __PT_R8(64,%r11),__LC_SAVE_AREA_ASYNC
- stmg %r8,%r9,__PT_PSW(%r11)
- tm __PT_PSW+1(%r11),0x01 # coming from user space?
- jno .Lext_skip_asce
- lctlg %c1,%c1,__LC_KERNEL_ASCE
-.Lext_skip_asce:
- lghi %r1,__LC_EXT_PARAMS2
- mvc __PT_INT_CODE(4,%r11),__LC_EXT_CPU_ADDR
- mvc __PT_INT_PARM(4,%r11),__LC_EXT_PARAMS
- mvc __PT_INT_PARM_LONG(8,%r11),0(%r1)
- xc __PT_FLAGS(8,%r11),__PT_FLAGS(%r11)
- xc __SF_BACKCHAIN(8,%r15),__SF_BACKCHAIN(%r15)
- TRACE_IRQS_OFF
- lgr %r2,%r11 # pass pointer to pt_regs
- lghi %r3,EXT_INTERRUPT
- brasl %r14,do_IRQ
- j .Lio_return
-ENDPROC(ext_int_handler)
+INT_HANDLER ext_int_handler,__LC_EXT_OLD_PSW,do_ext_irq
+INT_HANDLER io_int_handler,__LC_IO_OLD_PSW,do_io_irq
/*
* Load idle PSW.
*/
ENTRY(psw_idle)
stg %r3,__SF_EMPTY(%r15)
- larl %r1,.Lpsw_idle_exit
+ larl %r1,psw_idle_exit
stg %r1,__SF_EMPTY+8(%r15)
larl %r1,smp_cpu_mtid
llgf %r1,0(%r1)
ltgr %r1,%r1
jz .Lpsw_idle_stcctm
- .insn rsy,0xeb0000000017,%r1,5,__SF_EMPTY+16(%r15)
+ .insn rsy,0xeb0000000017,%r1,5,__MT_CYCLES_ENTER(%r2)
.Lpsw_idle_stcctm:
oi __LC_CPU_FLAGS+7,_CIF_ENABLED_WAIT
BPON
STCK __CLOCK_IDLE_ENTER(%r2)
stpt __TIMER_IDLE_ENTER(%r2)
lpswe __SF_EMPTY(%r15)
-.Lpsw_idle_exit:
+.globl psw_idle_exit
+psw_idle_exit:
BR_EX %r14
ENDPROC(psw_idle)
/*
- * Store floating-point controls and floating-point or vector register
- * depending whether the vector facility is available. A critical section
- * cleanup assures that the registers are stored even if interrupted for
- * some other work. The CIF_FPU flag is set to trigger a lazy restore
- * of the register contents at return from io or a system call.
- */
-ENTRY(save_fpu_regs)
- stnsm __SF_EMPTY(%r15),0xfc
- lg %r2,__LC_CURRENT
- aghi %r2,__TASK_thread
- TSTMSK __LC_CPU_FLAGS,_CIF_FPU
- jo .Lsave_fpu_regs_exit
- stfpc __THREAD_FPU_fpc(%r2)
- lg %r3,__THREAD_FPU_regs(%r2)
- TSTMSK __LC_MACHINE_FLAGS,MACHINE_FLAG_VX
- jz .Lsave_fpu_regs_fp # no -> store FP regs
- VSTM %v0,%v15,0,%r3 # vstm 0,15,0(3)
- VSTM %v16,%v31,256,%r3 # vstm 16,31,256(3)
- j .Lsave_fpu_regs_done # -> set CIF_FPU flag
-.Lsave_fpu_regs_fp:
- std 0,0(%r3)
- std 1,8(%r3)
- std 2,16(%r3)
- std 3,24(%r3)
- std 4,32(%r3)
- std 5,40(%r3)
- std 6,48(%r3)
- std 7,56(%r3)
- std 8,64(%r3)
- std 9,72(%r3)
- std 10,80(%r3)
- std 11,88(%r3)
- std 12,96(%r3)
- std 13,104(%r3)
- std 14,112(%r3)
- std 15,120(%r3)
-.Lsave_fpu_regs_done:
- oi __LC_CPU_FLAGS+7,_CIF_FPU
-.Lsave_fpu_regs_exit:
- ssm __SF_EMPTY(%r15)
- BR_EX %r14
-.Lsave_fpu_regs_end:
-ENDPROC(save_fpu_regs)
-EXPORT_SYMBOL(save_fpu_regs)
-
-/*
- * Load floating-point controls and floating-point or vector registers.
- * A critical section cleanup assures that the register contents are
- * loaded even if interrupted for some other work.
- *
- * There are special calling conventions to fit into sysc and io return work:
- * %r15: <kernel stack>
- * The function requires:
- * %r4
- */
-load_fpu_regs:
- stnsm __SF_EMPTY(%r15),0xfc
- lg %r4,__LC_CURRENT
- aghi %r4,__TASK_thread
- TSTMSK __LC_CPU_FLAGS,_CIF_FPU
- jno .Lload_fpu_regs_exit
- lfpc __THREAD_FPU_fpc(%r4)
- TSTMSK __LC_MACHINE_FLAGS,MACHINE_FLAG_VX
- lg %r4,__THREAD_FPU_regs(%r4) # %r4 <- reg save area
- jz .Lload_fpu_regs_fp # -> no VX, load FP regs
- VLM %v0,%v15,0,%r4
- VLM %v16,%v31,256,%r4
- j .Lload_fpu_regs_done
-.Lload_fpu_regs_fp:
- ld 0,0(%r4)
- ld 1,8(%r4)
- ld 2,16(%r4)
- ld 3,24(%r4)
- ld 4,32(%r4)
- ld 5,40(%r4)
- ld 6,48(%r4)
- ld 7,56(%r4)
- ld 8,64(%r4)
- ld 9,72(%r4)
- ld 10,80(%r4)
- ld 11,88(%r4)
- ld 12,96(%r4)
- ld 13,104(%r4)
- ld 14,112(%r4)
- ld 15,120(%r4)
-.Lload_fpu_regs_done:
- ni __LC_CPU_FLAGS+7,255-_CIF_FPU
-.Lload_fpu_regs_exit:
- ssm __SF_EMPTY(%r15)
- BR_EX %r14
-.Lload_fpu_regs_end:
-ENDPROC(load_fpu_regs)
-
-/*
* Machine check handler routines
*/
ENTRY(mcck_int_handler)
@@ -1146,11 +522,8 @@ ENTRY(mcck_int_handler)
mvc __LC_MCCK_ENTER_TIMER(8),0(%r14)
TSTMSK __LC_MCCK_CODE,MCCK_CODE_CPU_TIMER_VALID
jo 3f
- la %r14,__LC_SYNC_ENTER_TIMER
- clc 0(8,%r14),__LC_ASYNC_ENTER_TIMER
- jl 0f
- la %r14,__LC_ASYNC_ENTER_TIMER
-0: clc 0(8,%r14),__LC_EXIT_TIMER
+ la %r14,__LC_SYS_ENTER_TIMER
+ clc 0(8,%r14),__LC_EXIT_TIMER
jl 1f
la %r14,__LC_EXIT_TIMER
1: clc 0(8,%r14),__LC_LAST_UPDATE_TIMER
@@ -1165,14 +538,32 @@ ENTRY(mcck_int_handler)
TSTMSK __LC_MCCK_CODE,MCCK_CODE_PSW_IA_VALID
jno .Lmcck_panic
4: ssm __LC_PGM_NEW_PSW # turn dat on, keep irqs off
- SWITCH_ASYNC __LC_GPREGS_SAVE_AREA+64,__LC_MCCK_ENTER_TIMER,__LC_MCCK_CLOCK
+ tmhh %r8,0x0001 # interrupting from user ?
+ jnz .Lmcck_user
+#if IS_ENABLED(CONFIG_KVM)
+ lgr %r14,%r9
+ larl %r13,.Lsie_gmap
+ slgr %r14,%r13
+ lghi %r13,.Lsie_done - .Lsie_gmap
+ clgr %r14,%r13
+ jhe .Lmcck_stack
+ brasl %r14,.Lcleanup_sie_mcck
+#endif
+ j .Lmcck_stack
+.Lmcck_user:
+ BPENTER __TI_flags(%r12),_TIF_ISOLATE_BP
+.Lmcck_stack:
+ lg %r15,__LC_MCCK_STACK
.Lmcck_skip:
+ la %r11,STACK_FRAME_OVERHEAD(%r15)
+ stctg %c1,%c1,__PT_CR1(%r11)
+ lctlg %c1,%c1,__LC_KERNEL_ASCE
+ xc __SF_BACKCHAIN(8,%r15),__SF_BACKCHAIN(%r15)
lghi %r14,__LC_GPREGS_SAVE_AREA+64
stmg %r0,%r7,__PT_R0(%r11)
# clear user controlled registers to prevent speculative use
xgr %r0,%r0
xgr %r1,%r1
- xgr %r2,%r2
xgr %r3,%r3
xgr %r4,%r4
xgr %r5,%r5
@@ -1181,9 +572,6 @@ ENTRY(mcck_int_handler)
xgr %r10,%r10
mvc __PT_R8(64,%r11),0(%r14)
stmg %r8,%r9,__PT_PSW(%r11)
- la %r14,4095
- mvc __PT_CR1(8,%r11),__LC_CREGS_SAVE_AREA-4095+8(%r14)
- lctlg %c1,%c1,__LC_KERNEL_ASCE
xc __PT_FLAGS(8,%r11),__PT_FLAGS(%r11)
xc __SF_BACKCHAIN(8,%r15),__SF_BACKCHAIN(%r15)
lgr %r2,%r11 # pass pointer to pt_regs
@@ -1195,9 +583,7 @@ ENTRY(mcck_int_handler)
xc __SF_BACKCHAIN(8,%r1),__SF_BACKCHAIN(%r1)
la %r11,STACK_FRAME_OVERHEAD(%r1)
lgr %r15,%r1
- TRACE_IRQS_OFF
brasl %r14,s390_handle_mcck
- TRACE_IRQS_ON
.Lmcck_return:
lctlg %c1,%c1,__PT_CR1(%r11)
lmg %r0,%r10,__PT_R0(%r11)
@@ -1211,7 +597,6 @@ ENTRY(mcck_int_handler)
.Lmcck_panic:
lg %r15,__LC_NODAT_STACK
- la %r11,STACK_FRAME_OVERHEAD(%r15)
j .Lmcck_skip
ENDPROC(mcck_int_handler)
@@ -1264,21 +649,20 @@ ENDPROC(stack_overflow)
#endif
#if IS_ENABLED(CONFIG_KVM)
-.Lcleanup_sie:
- cghi %r11,__LC_SAVE_AREA_ASYNC #Is this in normal interrupt?
- je 1f
+.Lcleanup_sie_mcck:
larl %r13,.Lsie_entry
slgr %r9,%r13
larl %r13,.Lsie_skip
clgr %r9,%r13
- jh 1f
+ jh .Lcleanup_sie_int
oi __LC_CPU_FLAGS+7, _CIF_MCCK_GUEST
-1: BPENTER __SF_SIE_FLAGS(%r15),(_TIF_ISOLATE_BP|_TIF_ISOLATE_BP_GUEST)
+.Lcleanup_sie_int:
+ BPENTER __SF_SIE_FLAGS(%r15),(_TIF_ISOLATE_BP|_TIF_ISOLATE_BP_GUEST)
lg %r9,__SF_SIE_CONTROL(%r15) # get control block pointer
ni __SIE_PROG0C+3(%r9),0xfe # no longer in SIE
lctlg %c1,%c1,__LC_KERNEL_ASCE
larl %r9,sie_exit # skip forward to sie_exit
- BR_EX %r14,%r11
+ BR_EX %r14,%r13
#endif
.section .rodata, "a"
diff --git a/arch/s390/kernel/entry.h b/arch/s390/kernel/entry.h
index a16c33b32ab0..3d0c0ac5c20e 100644
--- a/arch/s390/kernel/entry.h
+++ b/arch/s390/kernel/entry.h
@@ -17,8 +17,9 @@ void io_int_handler(void);
void mcck_int_handler(void);
void restart_int_handler(void);
-asmlinkage long do_syscall_trace_enter(struct pt_regs *regs);
-asmlinkage void do_syscall_trace_exit(struct pt_regs *regs);
+void __ret_from_fork(struct task_struct *prev, struct pt_regs *regs);
+void __do_pgm_check(struct pt_regs *regs);
+void __do_syscall(struct pt_regs *regs, int per_trap);
void do_protection_exception(struct pt_regs *regs);
void do_dat_exception(struct pt_regs *regs);
@@ -48,9 +49,7 @@ void translation_exception(struct pt_regs *regs);
void vector_exception(struct pt_regs *regs);
void monitor_event_exception(struct pt_regs *regs);
-void do_per_trap(struct pt_regs *regs);
void do_report_trap(struct pt_regs *regs, int si_signo, int si_code, char *str);
-void syscall_trace(struct pt_regs *regs, int entryexit);
void kernel_stack_overflow(struct pt_regs * regs);
void do_signal(struct pt_regs *regs);
void handle_signal32(struct ksignal *ksig, sigset_t *oldset,
@@ -58,7 +57,8 @@ void handle_signal32(struct ksignal *ksig, sigset_t *oldset,
void do_notify_resume(struct pt_regs *regs);
void __init init_IRQ(void);
-void do_IRQ(struct pt_regs *regs, int irq);
+void do_io_irq(struct pt_regs *regs);
+void do_ext_irq(struct pt_regs *regs);
void do_restart(void);
void __init startup_init(void);
void die(struct pt_regs *regs, const char *str);
@@ -82,8 +82,6 @@ long sys_s390_sthyi(unsigned long function_code, void __user *buffer, u64 __user
DECLARE_PER_CPU(u64, mt_cycles[8]);
-void gs_load_bc_cb(struct pt_regs *regs);
-
unsigned long stack_alloc(void);
void stack_free(unsigned long stack);
diff --git a/arch/s390/kernel/fpu.c b/arch/s390/kernel/fpu.c
index 0da378e2eb25..d864c9a325e2 100644
--- a/arch/s390/kernel/fpu.c
+++ b/arch/s390/kernel/fpu.c
@@ -175,3 +175,91 @@ void __kernel_fpu_end(struct kernel_fpu *state, u32 flags)
: "1", "cc");
}
EXPORT_SYMBOL(__kernel_fpu_end);
+
+void __load_fpu_regs(void)
+{
+ struct fpu *state = &current->thread.fpu;
+ unsigned long *regs = current->thread.fpu.regs;
+
+ asm volatile("lfpc %0" : : "Q" (state->fpc));
+ if (likely(MACHINE_HAS_VX)) {
+ asm volatile("lgr 1,%0\n"
+ "VLM 0,15,0,1\n"
+ "VLM 16,31,256,1\n"
+ :
+ : "d" (regs)
+ : "1", "cc", "memory");
+ } else {
+ asm volatile("ld 0,%0" : : "Q" (regs[0]));
+ asm volatile("ld 1,%0" : : "Q" (regs[1]));
+ asm volatile("ld 2,%0" : : "Q" (regs[2]));
+ asm volatile("ld 3,%0" : : "Q" (regs[3]));
+ asm volatile("ld 4,%0" : : "Q" (regs[4]));
+ asm volatile("ld 5,%0" : : "Q" (regs[5]));
+ asm volatile("ld 6,%0" : : "Q" (regs[6]));
+ asm volatile("ld 7,%0" : : "Q" (regs[7]));
+ asm volatile("ld 8,%0" : : "Q" (regs[8]));
+ asm volatile("ld 9,%0" : : "Q" (regs[9]));
+ asm volatile("ld 10,%0" : : "Q" (regs[10]));
+ asm volatile("ld 11,%0" : : "Q" (regs[11]));
+ asm volatile("ld 12,%0" : : "Q" (regs[12]));
+ asm volatile("ld 13,%0" : : "Q" (regs[13]));
+ asm volatile("ld 14,%0" : : "Q" (regs[14]));
+ asm volatile("ld 15,%0" : : "Q" (regs[15]));
+ }
+ clear_cpu_flag(CIF_FPU);
+}
+EXPORT_SYMBOL(__load_fpu_regs);
+
+void load_fpu_regs(void)
+{
+ raw_local_irq_disable();
+ __load_fpu_regs();
+ raw_local_irq_enable();
+}
+EXPORT_SYMBOL(load_fpu_regs);
+
+void save_fpu_regs(void)
+{
+ unsigned long flags, *regs;
+ struct fpu *state;
+
+ local_irq_save(flags);
+
+ if (test_cpu_flag(CIF_FPU))
+ goto out;
+
+ state = &current->thread.fpu;
+ regs = current->thread.fpu.regs;
+
+ asm volatile("stfpc %0" : "=Q" (state->fpc));
+ if (likely(MACHINE_HAS_VX)) {
+ asm volatile("lgr 1,%0\n"
+ "VSTM 0,15,0,1\n"
+ "VSTM 16,31,256,1\n"
+ :
+ : "d" (regs)
+ : "1", "cc", "memory");
+ } else {
+ asm volatile("std 0,%0" : "=Q" (regs[0]));
+ asm volatile("std 1,%0" : "=Q" (regs[1]));
+ asm volatile("std 2,%0" : "=Q" (regs[2]));
+ asm volatile("std 3,%0" : "=Q" (regs[3]));
+ asm volatile("std 4,%0" : "=Q" (regs[4]));
+ asm volatile("std 5,%0" : "=Q" (regs[5]));
+ asm volatile("std 6,%0" : "=Q" (regs[6]));
+ asm volatile("std 7,%0" : "=Q" (regs[7]));
+ asm volatile("std 8,%0" : "=Q" (regs[8]));
+ asm volatile("std 9,%0" : "=Q" (regs[9]));
+ asm volatile("std 10,%0" : "=Q" (regs[10]));
+ asm volatile("std 11,%0" : "=Q" (regs[11]));
+ asm volatile("std 12,%0" : "=Q" (regs[12]));
+ asm volatile("std 13,%0" : "=Q" (regs[13]));
+ asm volatile("std 14,%0" : "=Q" (regs[14]));
+ asm volatile("std 15,%0" : "=Q" (regs[15]));
+ }
+ set_cpu_flag(CIF_FPU);
+out:
+ local_irq_restore(flags);
+}
+EXPORT_SYMBOL(save_fpu_regs);
diff --git a/arch/s390/kernel/idle.c b/arch/s390/kernel/idle.c
index a5d4d80d6ede..812073ea073e 100644
--- a/arch/s390/kernel/idle.c
+++ b/arch/s390/kernel/idle.c
@@ -14,12 +14,36 @@
#include <linux/cpu.h>
#include <linux/sched/cputime.h>
#include <trace/events/power.h>
+#include <asm/cpu_mf.h>
#include <asm/nmi.h>
#include <asm/smp.h>
#include "entry.h"
static DEFINE_PER_CPU(struct s390_idle_data, s390_idle);
+void account_idle_time_irq(void)
+{
+ struct s390_idle_data *idle = this_cpu_ptr(&s390_idle);
+ u64 cycles_new[8];
+ int i;
+
+ clear_cpu_flag(CIF_ENABLED_WAIT);
+ if (smp_cpu_mtid) {
+ stcctm(MT_DIAG, smp_cpu_mtid, cycles_new);
+ for (i = 0; i < smp_cpu_mtid; i++)
+ this_cpu_add(mt_cycles[i], cycles_new[i] - idle->mt_cycles_enter[i]);
+ }
+
+ idle->clock_idle_exit = S390_lowcore.int_clock;
+ idle->timer_idle_exit = S390_lowcore.sys_enter_timer;
+
+ S390_lowcore.steal_timer += idle->clock_idle_enter - S390_lowcore.last_update_clock;
+ S390_lowcore.last_update_clock = idle->clock_idle_exit;
+
+ S390_lowcore.system_timer += S390_lowcore.last_update_timer - idle->timer_idle_enter;
+ S390_lowcore.last_update_timer = idle->timer_idle_exit;
+}
+
void arch_cpu_idle(void)
{
struct s390_idle_data *idle = this_cpu_ptr(&s390_idle);
diff --git a/arch/s390/kernel/irq.c b/arch/s390/kernel/irq.c
index f8a8b9428ae2..c6d40bcf4a68 100644
--- a/arch/s390/kernel/irq.c
+++ b/arch/s390/kernel/irq.c
@@ -21,6 +21,7 @@
#include <linux/init.h>
#include <linux/cpu.h>
#include <linux/irq.h>
+#include <linux/entry-common.h>
#include <asm/irq_regs.h>
#include <asm/cputime.h>
#include <asm/lowcore.h>
@@ -95,19 +96,97 @@ static const struct irq_class irqclass_sub_desc[] = {
{.irq = CPU_RST, .name = "RST", .desc = "[CPU] CPU Restart"},
};
-void do_IRQ(struct pt_regs *regs, int irq)
+static void do_IRQ(struct pt_regs *regs, int irq)
{
- struct pt_regs *old_regs;
-
- old_regs = set_irq_regs(regs);
- irq_enter();
if (tod_after_eq(S390_lowcore.int_clock,
S390_lowcore.clock_comparator))
/* Serve timer interrupts first. */
clock_comparator_work();
generic_handle_irq(irq);
+}
+
+static int on_async_stack(void)
+{
+ unsigned long frame = current_frame_address();
+
+ return !!!((S390_lowcore.async_stack - frame) >> (PAGE_SHIFT + THREAD_SIZE_ORDER));
+}
+
+static void do_irq_async(struct pt_regs *regs, int irq)
+{
+ if (on_async_stack())
+ do_IRQ(regs, irq);
+ else
+ CALL_ON_STACK(do_IRQ, S390_lowcore.async_stack, 2, regs, irq);
+}
+
+static int irq_pending(struct pt_regs *regs)
+{
+ int cc;
+
+ asm volatile("tpi 0\n"
+ "ipm %0" : "=d" (cc) : : "cc");
+ return cc >> 28;
+}
+
+void noinstr do_io_irq(struct pt_regs *regs)
+{
+ irqentry_state_t state = irqentry_enter(regs);
+ struct pt_regs *old_regs = set_irq_regs(regs);
+ int from_idle;
+
+ irq_enter();
+
+ if (user_mode(regs))
+ update_timer_sys();
+
+ from_idle = !user_mode(regs) && regs->psw.addr == (unsigned long)psw_idle_exit;
+ if (from_idle)
+ account_idle_time_irq();
+
+ do {
+ memcpy(&regs->int_code, &S390_lowcore.subchannel_id, 12);
+ if (S390_lowcore.io_int_word & BIT(31))
+ do_irq_async(regs, THIN_INTERRUPT);
+ else
+ do_irq_async(regs, IO_INTERRUPT);
+ } while (MACHINE_IS_LPAR && irq_pending(regs));
+
+ irq_exit();
+ set_irq_regs(old_regs);
+ irqentry_exit(regs, state);
+
+ if (from_idle)
+ regs->psw.mask &= ~(PSW_MASK_EXT | PSW_MASK_IO | PSW_MASK_WAIT);
+}
+
+void noinstr do_ext_irq(struct pt_regs *regs)
+{
+ irqentry_state_t state = irqentry_enter(regs);
+ struct pt_regs *old_regs = set_irq_regs(regs);
+ int from_idle;
+
+ irq_enter();
+
+ if (user_mode(regs))
+ update_timer_sys();
+
+ memcpy(&regs->int_code, &S390_lowcore.ext_cpu_addr, 4);
+ regs->int_parm = S390_lowcore.ext_params;
+ regs->int_parm_long = *(unsigned long *)S390_lowcore.ext_params2;
+
+ from_idle = !user_mode(regs) && regs->psw.addr == (unsigned long)psw_idle_exit;
+ if (from_idle)
+ account_idle_time_irq();
+
+ do_irq_async(regs, EXT_INTERRUPT);
+
irq_exit();
set_irq_regs(old_regs);
+ irqentry_exit(regs, state);
+
+ if (from_idle)
+ regs->psw.mask &= ~(PSW_MASK_EXT | PSW_MASK_IO | PSW_MASK_WAIT);
}
static void show_msi_interrupt(struct seq_file *p, int irq)
diff --git a/arch/s390/kernel/nmi.c b/arch/s390/kernel/nmi.c
index 86c8d5370e7f..11f8c296f60d 100644
--- a/arch/s390/kernel/nmi.c
+++ b/arch/s390/kernel/nmi.c
@@ -131,12 +131,11 @@ static notrace void s390_handle_damage(void)
NOKPROBE_SYMBOL(s390_handle_damage);
/*
- * Main machine check handler function. Will be called with interrupts enabled
- * or disabled and machine checks enabled or disabled.
+ * Main machine check handler function. Will be called with interrupts disabled
+ * and machine checks enabled.
*/
-void s390_handle_mcck(void)
+void __s390_handle_mcck(void)
{
- unsigned long flags;
struct mcck_struct mcck;
/*
@@ -144,12 +143,10 @@ void s390_handle_mcck(void)
* machine checks. Afterwards delete the old state and enable machine
* checks again.
*/
- local_irq_save(flags);
local_mcck_disable();
mcck = *this_cpu_ptr(&cpu_mcck);
memset(this_cpu_ptr(&cpu_mcck), 0, sizeof(mcck));
local_mcck_enable();
- local_irq_restore(flags);
if (mcck.channel_report)
crw_handle_channel_report();
@@ -181,8 +178,13 @@ void s390_handle_mcck(void)
do_exit(SIGSEGV);
}
}
-EXPORT_SYMBOL_GPL(s390_handle_mcck);
+void noinstr s390_handle_mcck(void)
+{
+ trace_hardirqs_off();
+ __s390_handle_mcck();
+ trace_hardirqs_on();
+}
/*
* returns 0 if all required registers are available
* returns 1 otherwise
@@ -344,6 +346,9 @@ int notrace s390_do_machine_check(struct pt_regs *regs)
int mcck_pending = 0;
nmi_enter();
+
+ if (user_mode(regs))
+ update_timer_mcck();
inc_irq_stat(NMI_NMI);
mci.val = S390_lowcore.mcck_interruption_code;
mcck = this_cpu_ptr(&cpu_mcck);
diff --git a/arch/s390/kernel/perf_cpum_cf_diag.c b/arch/s390/kernel/perf_cpum_cf_diag.c
index e949ab832ed7..b5c86fb70d63 100644
--- a/arch/s390/kernel/perf_cpum_cf_diag.c
+++ b/arch/s390/kernel/perf_cpum_cf_diag.c
@@ -118,8 +118,8 @@ static void cf_diag_trailer(struct cf_trailer_entry *te)
if (te->cpu_speed)
te->speed = 1;
te->clock_base = 1; /* Save clock base */
- memcpy(&te->tod_base, &tod_clock_base[1], 8);
- store_tod_clock((__u64 *)&te->timestamp);
+ te->tod_base = tod_clock_base.tod;
+ te->timestamp = get_tod_clock_fast();
}
/*
diff --git a/arch/s390/kernel/perf_cpum_sf.c b/arch/s390/kernel/perf_cpum_sf.c
index 19cd7b961c45..db62def4ef28 100644
--- a/arch/s390/kernel/perf_cpum_sf.c
+++ b/arch/s390/kernel/perf_cpum_sf.c
@@ -1682,7 +1682,7 @@ static void aux_sdb_init(unsigned long sdb)
/* Save clock base */
te->clock_base = 1;
- memcpy(&te->progusage2, &tod_clock_base[1], 8);
+ te->progusage2 = tod_clock_base.tod;
}
/*
diff --git a/arch/s390/kernel/process.c b/arch/s390/kernel/process.c
index bc3ca54edfb4..367bd000f6d1 100644
--- a/arch/s390/kernel/process.c
+++ b/arch/s390/kernel/process.c
@@ -29,6 +29,7 @@
#include <linux/random.h>
#include <linux/export.h>
#include <linux/init_task.h>
+#include <linux/entry-common.h>
#include <asm/cpu_mf.h>
#include <asm/io.h>
#include <asm/processor.h>
@@ -43,9 +44,22 @@
#include <asm/unwind.h>
#include "entry.h"
-asmlinkage void ret_from_fork(void) asm ("ret_from_fork");
+void ret_from_fork(void) asm("ret_from_fork");
-extern void kernel_thread_starter(void);
+void __ret_from_fork(struct task_struct *prev, struct pt_regs *regs)
+{
+ void (*func)(void *arg);
+
+ schedule_tail(prev);
+
+ if (!user_mode(regs)) {
+ /* Kernel thread */
+ func = (void *)regs->gprs[9];
+ func((void *)regs->gprs[10]);
+ }
+ clear_pt_regs_flag(regs, PIF_SYSCALL);
+ syscall_exit_to_user_mode(regs);
+}
void flush_thread(void)
{
@@ -108,10 +122,12 @@ int copy_thread(unsigned long clone_flags, unsigned long new_stackp,
p->thread.last_break = 1;
frame->sf.back_chain = 0;
+ frame->sf.gprs[5] = (unsigned long)frame + sizeof(struct stack_frame);
+ frame->sf.gprs[6] = (unsigned long)p;
/* new return point is ret_from_fork */
- frame->sf.gprs[8] = (unsigned long) ret_from_fork;
+ frame->sf.gprs[8] = (unsigned long)ret_from_fork;
/* fake return stack for resume(), don't go back to schedule */
- frame->sf.gprs[9] = (unsigned long) frame;
+ frame->sf.gprs[9] = (unsigned long)frame;
/* Store access registers to kernel stack of new process. */
if (unlikely(p->flags & PF_KTHREAD)) {
@@ -120,10 +136,10 @@ int copy_thread(unsigned long clone_flags, unsigned long new_stackp,
frame->childregs.psw.mask = PSW_KERNEL_BITS | PSW_MASK_DAT |
PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK;
frame->childregs.psw.addr =
- (unsigned long) kernel_thread_starter;
+ (unsigned long)__ret_from_fork;
frame->childregs.gprs[9] = new_stackp; /* function */
frame->childregs.gprs[10] = arg;
- frame->childregs.gprs[11] = (unsigned long) do_exit;
+ frame->childregs.gprs[11] = (unsigned long)do_exit;
frame->childregs.orig_gpr2 = -1;
return 0;
@@ -153,7 +169,7 @@ int copy_thread(unsigned long clone_flags, unsigned long new_stackp,
return 0;
}
-asmlinkage void execve_tail(void)
+void execve_tail(void)
{
current->thread.fpu.fpc = 0;
asm volatile("sfpc %0" : : "d" (0));
diff --git a/arch/s390/kernel/ptrace.c b/arch/s390/kernel/ptrace.c
index a76dd27fb2e8..18b3416fd663 100644
--- a/arch/s390/kernel/ptrace.c
+++ b/arch/s390/kernel/ptrace.c
@@ -7,6 +7,7 @@
* Martin Schwidefsky (schwidefsky@de.ibm.com)
*/
+#include "asm/ptrace.h"
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/sched/task_stack.h>
@@ -37,9 +38,6 @@
#include "compat_ptrace.h"
#endif
-#define CREATE_TRACE_POINTS
-#include <trace/events/syscalls.h>
-
void update_cr_regs(struct task_struct *task)
{
struct pt_regs *regs = task_pt_regs(task);
@@ -140,7 +138,7 @@ void ptrace_disable(struct task_struct *task)
memset(&task->thread.per_user, 0, sizeof(task->thread.per_user));
memset(&task->thread.per_event, 0, sizeof(task->thread.per_event));
clear_tsk_thread_flag(task, TIF_SINGLE_STEP);
- clear_pt_regs_flag(task_pt_regs(task), PIF_PER_TRAP);
+ clear_tsk_thread_flag(task, TIF_PER_TRAP);
task->thread.per_flags = 0;
}
@@ -322,25 +320,6 @@ static inline void __poke_user_per(struct task_struct *child,
child->thread.per_user.end = data;
}
-static void fixup_int_code(struct task_struct *child, addr_t data)
-{
- struct pt_regs *regs = task_pt_regs(child);
- int ilc = regs->int_code >> 16;
- u16 insn;
-
- if (ilc > 6)
- return;
-
- if (ptrace_access_vm(child, regs->psw.addr - (regs->int_code >> 16),
- &insn, sizeof(insn), FOLL_FORCE) != sizeof(insn))
- return;
-
- /* double check that tracee stopped on svc instruction */
- if ((insn >> 8) != 0xa)
- return;
-
- regs->int_code = 0x20000 | (data & 0xffff);
-}
/*
* Write a word to the user area of a process at location addr. This
* operation does have an additional problem compared to peek_user.
@@ -374,10 +353,12 @@ static int __poke_user(struct task_struct *child, addr_t addr, addr_t data)
}
if (test_pt_regs_flag(regs, PIF_SYSCALL) &&
- addr == offsetof(struct user, regs.gprs[2]))
- fixup_int_code(child, data);
- *(addr_t *)((addr_t) &regs->psw + addr) = data;
+ addr == offsetof(struct user, regs.gprs[2])) {
+ struct pt_regs *regs = task_pt_regs(child);
+ regs->int_code = 0x20000 | (data & 0xffff);
+ }
+ *(addr_t *)((addr_t) &regs->psw + addr) = data;
} else if (addr < (addr_t) (&dummy->regs.orig_gpr2)) {
/*
* access registers are stored in the thread structure
@@ -742,10 +723,12 @@ static int __poke_user_compat(struct task_struct *child,
regs->psw.mask = (regs->psw.mask & ~PSW_MASK_BA) |
(__u64)(tmp & PSW32_ADDR_AMODE);
} else {
-
if (test_pt_regs_flag(regs, PIF_SYSCALL) &&
- addr == offsetof(struct compat_user, regs.gprs[2]))
- fixup_int_code(child, data);
+ addr == offsetof(struct compat_user, regs.gprs[2])) {
+ struct pt_regs *regs = task_pt_regs(child);
+
+ regs->int_code = 0x20000 | (data & 0xffff);
+ }
/* gpr 0-15 */
*(__u32*)((addr_t) &regs->psw + addr*2 + 4) = tmp;
}
@@ -862,82 +845,6 @@ long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
}
#endif
-asmlinkage long do_syscall_trace_enter(struct pt_regs *regs)
-{
- unsigned long mask = -1UL;
- long ret = -1;
-
- if (is_compat_task())
- mask = 0xffffffff;
-
- /*
- * The sysc_tracesys code in entry.S stored the system
- * call number to gprs[2].
- */
- if (test_thread_flag(TIF_SYSCALL_TRACE) &&
- tracehook_report_syscall_entry(regs)) {
- /*
- * Tracing decided this syscall should not happen. Skip
- * the system call and the system call restart handling.
- */
- goto skip;
- }
-
-#ifdef CONFIG_SECCOMP
- /* Do the secure computing check after ptrace. */
- if (unlikely(test_thread_flag(TIF_SECCOMP))) {
- struct seccomp_data sd;
-
- if (is_compat_task()) {
- sd.instruction_pointer = regs->psw.addr & 0x7fffffff;
- sd.arch = AUDIT_ARCH_S390;
- } else {
- sd.instruction_pointer = regs->psw.addr;
- sd.arch = AUDIT_ARCH_S390X;
- }
-
- sd.nr = regs->int_code & 0xffff;
- sd.args[0] = regs->orig_gpr2 & mask;
- sd.args[1] = regs->gprs[3] & mask;
- sd.args[2] = regs->gprs[4] & mask;
- sd.args[3] = regs->gprs[5] & mask;
- sd.args[4] = regs->gprs[6] & mask;
- sd.args[5] = regs->gprs[7] & mask;
-
- if (__secure_computing(&sd) == -1)
- goto skip;
- }
-#endif /* CONFIG_SECCOMP */
-
- if (unlikely(test_thread_flag(TIF_SYSCALL_TRACEPOINT)))
- trace_sys_enter(regs, regs->int_code & 0xffff);
-
-
- audit_syscall_entry(regs->int_code & 0xffff, regs->orig_gpr2 & mask,
- regs->gprs[3] &mask, regs->gprs[4] &mask,
- regs->gprs[5] &mask);
-
- if ((signed long)regs->gprs[2] >= NR_syscalls) {
- regs->gprs[2] = -ENOSYS;
- ret = -ENOSYS;
- }
- return regs->gprs[2];
-skip:
- clear_pt_regs_flag(regs, PIF_SYSCALL);
- return ret;
-}
-
-asmlinkage void do_syscall_trace_exit(struct pt_regs *regs)
-{
- audit_syscall_exit(regs);
-
- if (unlikely(test_thread_flag(TIF_SYSCALL_TRACEPOINT)))
- trace_sys_exit(regs, regs->gprs[2]);
-
- if (test_thread_flag(TIF_SYSCALL_TRACE))
- tracehook_report_syscall_exit(regs, 0);
-}
-
/*
* user_regset definitions.
*/
diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c
index 1fbed91c73bc..60da976eee6f 100644
--- a/arch/s390/kernel/setup.c
+++ b/arch/s390/kernel/setup.c
@@ -338,7 +338,7 @@ int __init arch_early_irq_init(void)
return 0;
}
-static int __init async_stack_realloc(void)
+static int __init stack_realloc(void)
{
unsigned long old, new;
@@ -346,11 +346,18 @@ static int __init async_stack_realloc(void)
new = stack_alloc();
if (!new)
panic("Couldn't allocate async stack");
- S390_lowcore.async_stack = new + STACK_INIT_OFFSET;
+ WRITE_ONCE(S390_lowcore.async_stack, new + STACK_INIT_OFFSET);
free_pages(old, THREAD_SIZE_ORDER);
+
+ old = S390_lowcore.mcck_stack - STACK_INIT_OFFSET;
+ new = stack_alloc();
+ if (!new)
+ panic("Couldn't allocate machine check stack");
+ WRITE_ONCE(S390_lowcore.mcck_stack, new + STACK_INIT_OFFSET);
+ memblock_free(old, THREAD_SIZE);
return 0;
}
-early_initcall(async_stack_realloc);
+early_initcall(stack_realloc);
void __init arch_call_rest_init(void)
{
@@ -372,6 +379,7 @@ void __init arch_call_rest_init(void)
static void __init setup_lowcore_dat_off(void)
{
unsigned long int_psw_mask = PSW_KERNEL_BITS;
+ unsigned long mcck_stack;
struct lowcore *lc;
if (IS_ENABLED(CONFIG_KASAN))
@@ -411,8 +419,7 @@ static void __init setup_lowcore_dat_off(void)
memcpy(lc->alt_stfle_fac_list, S390_lowcore.alt_stfle_fac_list,
sizeof(lc->alt_stfle_fac_list));
nmi_alloc_boot_cpu(lc);
- lc->sync_enter_timer = S390_lowcore.sync_enter_timer;
- lc->async_enter_timer = S390_lowcore.async_enter_timer;
+ lc->sys_enter_timer = S390_lowcore.sys_enter_timer;
lc->exit_timer = S390_lowcore.exit_timer;
lc->user_timer = S390_lowcore.user_timer;
lc->system_timer = S390_lowcore.system_timer;
@@ -440,6 +447,12 @@ static void __init setup_lowcore_dat_off(void)
lc->restart_data = 0;
lc->restart_source = -1UL;
+ mcck_stack = (unsigned long)memblock_alloc(THREAD_SIZE, THREAD_SIZE);
+ if (!mcck_stack)
+ panic("%s: Failed to allocate %lu bytes align=0x%lx\n",
+ __func__, THREAD_SIZE, THREAD_SIZE);
+ lc->mcck_stack = mcck_stack + STACK_INIT_OFFSET;
+
/* Setup absolute zero lowcore */
mem_assign_absolute(S390_lowcore.restart_stack, lc->restart_stack);
mem_assign_absolute(S390_lowcore.restart_fn, lc->restart_fn);
diff --git a/arch/s390/kernel/signal.c b/arch/s390/kernel/signal.c
index b27b6c1f058d..90163e6184f5 100644
--- a/arch/s390/kernel/signal.c
+++ b/arch/s390/kernel/signal.c
@@ -16,6 +16,7 @@
#include <linux/smp.h>
#include <linux/kernel.h>
#include <linux/signal.h>
+#include <linux/entry-common.h>
#include <linux/errno.h>
#include <linux/wait.h>
#include <linux/ptrace.h>
@@ -170,6 +171,7 @@ static int restore_sigregs(struct pt_regs *regs, _sigregs __user *sregs)
fpregs_load(&user_sregs.fpregs, &current->thread.fpu);
clear_pt_regs_flag(regs, PIF_SYSCALL); /* No longer in a system call */
+ clear_pt_regs_flag(regs, PIF_SYSCALL_RESTART);
return 0;
}
@@ -459,7 +461,8 @@ static void handle_signal(struct ksignal *ksig, sigset_t *oldset,
* the kernel can handle, and then we build all the user-level signal handling
* stack-frames in one go after that.
*/
-void do_signal(struct pt_regs *regs)
+
+void arch_do_signal_or_restart(struct pt_regs *regs, bool has_signal)
{
struct ksignal ksig;
sigset_t *oldset = sigmask_to_save();
@@ -472,7 +475,7 @@ void do_signal(struct pt_regs *regs)
current->thread.system_call =
test_pt_regs_flag(regs, PIF_SYSCALL) ? regs->int_code : 0;
- if (test_thread_flag(TIF_SIGPENDING) && get_signal(&ksig)) {
+ if (has_signal && get_signal(&ksig)) {
/* Whee! Actually deliver the signal. */
if (current->thread.system_call) {
regs->int_code = current->thread.system_call;
@@ -498,6 +501,7 @@ void do_signal(struct pt_regs *regs)
}
/* No longer in a system call */
clear_pt_regs_flag(regs, PIF_SYSCALL);
+ clear_pt_regs_flag(regs, PIF_SYSCALL_RESTART);
rseq_signal_deliver(&ksig, regs);
if (is_compat_task())
handle_signal32(&ksig, oldset, regs);
@@ -508,6 +512,7 @@ void do_signal(struct pt_regs *regs)
/* No handlers present - check for system call restart */
clear_pt_regs_flag(regs, PIF_SYSCALL);
+ clear_pt_regs_flag(regs, PIF_SYSCALL_RESTART);
if (current->thread.system_call) {
regs->int_code = current->thread.system_call;
switch (regs->gprs[2]) {
@@ -520,9 +525,9 @@ void do_signal(struct pt_regs *regs)
case -ERESTARTNOINTR:
/* Restart system call with magic TIF bit. */
regs->gprs[2] = regs->orig_gpr2;
- set_pt_regs_flag(regs, PIF_SYSCALL);
+ set_pt_regs_flag(regs, PIF_SYSCALL_RESTART);
if (test_thread_flag(TIF_SINGLE_STEP))
- clear_pt_regs_flag(regs, PIF_PER_TRAP);
+ clear_thread_flag(TIF_PER_TRAP);
break;
}
}
diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c
index 27c763014114..e299892440b6 100644
--- a/arch/s390/kernel/smp.c
+++ b/arch/s390/kernel/smp.c
@@ -189,7 +189,7 @@ static void pcpu_ec_call(struct pcpu *pcpu, int ec_bit)
static int pcpu_alloc_lowcore(struct pcpu *pcpu, int cpu)
{
- unsigned long async_stack, nodat_stack;
+ unsigned long async_stack, nodat_stack, mcck_stack;
struct lowcore *lc;
if (pcpu != &pcpu_devices[0]) {
@@ -202,13 +202,15 @@ static int pcpu_alloc_lowcore(struct pcpu *pcpu, int cpu)
nodat_stack = pcpu->lowcore->nodat_stack - STACK_INIT_OFFSET;
}
async_stack = stack_alloc();
- if (!async_stack)
- goto out;
+ mcck_stack = stack_alloc();
+ if (!async_stack || !mcck_stack)
+ goto out_stack;
lc = pcpu->lowcore;
memcpy(lc, &S390_lowcore, 512);
memset((char *) lc + 512, 0, sizeof(*lc) - 512);
lc->async_stack = async_stack + STACK_INIT_OFFSET;
lc->nodat_stack = nodat_stack + STACK_INIT_OFFSET;
+ lc->mcck_stack = mcck_stack + STACK_INIT_OFFSET;
lc->cpu_nr = cpu;
lc->spinlock_lockval = arch_spin_lockval(cpu);
lc->spinlock_index = 0;
@@ -216,12 +218,13 @@ static int pcpu_alloc_lowcore(struct pcpu *pcpu, int cpu)
lc->return_lpswe = gen_lpswe(__LC_RETURN_PSW);
lc->return_mcck_lpswe = gen_lpswe(__LC_RETURN_MCCK_PSW);
if (nmi_alloc_per_cpu(lc))
- goto out_async;
+ goto out_stack;
lowcore_ptr[cpu] = lc;
pcpu_sigp_retry(pcpu, SIGP_SET_PREFIX, (u32)(unsigned long) lc);
return 0;
-out_async:
+out_stack:
+ stack_free(mcck_stack);
stack_free(async_stack);
out:
if (pcpu != &pcpu_devices[0]) {
@@ -233,16 +236,18 @@ out:
static void pcpu_free_lowcore(struct pcpu *pcpu)
{
- unsigned long async_stack, nodat_stack, lowcore;
+ unsigned long async_stack, nodat_stack, mcck_stack, lowcore;
nodat_stack = pcpu->lowcore->nodat_stack - STACK_INIT_OFFSET;
async_stack = pcpu->lowcore->async_stack - STACK_INIT_OFFSET;
+ mcck_stack = pcpu->lowcore->mcck_stack - STACK_INIT_OFFSET;
lowcore = (unsigned long) pcpu->lowcore;
pcpu_sigp_retry(pcpu, SIGP_SET_PREFIX, 0);
lowcore_ptr[pcpu - pcpu_devices] = NULL;
nmi_free_per_cpu(pcpu->lowcore);
stack_free(async_stack);
+ stack_free(mcck_stack);
if (pcpu == &pcpu_devices[0])
return;
free_pages(nodat_stack, THREAD_SIZE_ORDER);
@@ -499,7 +504,7 @@ static void smp_handle_ext_call(void)
if (test_bit(ec_call_function_single, &bits))
generic_smp_call_function_single_interrupt();
if (test_bit(ec_mcck_pending, &bits))
- s390_handle_mcck();
+ __s390_handle_mcck();
}
static void do_ext_call_interrupt(struct ext_code ext_code,
diff --git a/arch/s390/kernel/sys_s390.c b/arch/s390/kernel/syscall.c
index 202fa73ac167..bc8e650e377d 100644
--- a/arch/s390/kernel/sys_s390.c
+++ b/arch/s390/kernel/syscall.c
@@ -29,6 +29,13 @@
#include <linux/unistd.h>
#include <linux/ipc.h>
#include <linux/uaccess.h>
+#include <linux/string.h>
+#include <linux/thread_info.h>
+#include <linux/entry-common.h>
+
+#include <asm/ptrace.h>
+#include <asm/vtime.h>
+
#include "entry.h"
/*
@@ -100,3 +107,62 @@ SYSCALL_DEFINE0(ni_syscall)
{
return -ENOSYS;
}
+
+void do_syscall(struct pt_regs *regs)
+{
+ unsigned long nr;
+
+ nr = regs->int_code & 0xffff;
+ if (!nr) {
+ nr = regs->gprs[1] & 0xffff;
+ regs->int_code &= ~0xffffUL;
+ regs->int_code |= nr;
+ }
+
+ regs->gprs[2] = nr;
+
+ nr = syscall_enter_from_user_mode_work(regs, nr);
+
+ /*
+ * In the s390 ptrace ABI, both the syscall number and the return value
+ * use gpr2. However, userspace puts the syscall number either in the
+ * svc instruction itself, or uses gpr1. To make at least skipping syscalls
+ * work, the ptrace code sets PIF_SYSCALL_RET_SET, which is checked here
+ * and if set, the syscall will be skipped.
+ */
+ if (!test_pt_regs_flag(regs, PIF_SYSCALL_RET_SET)) {
+ regs->gprs[2] = -ENOSYS;
+ if (likely(nr < NR_syscalls))
+ regs->gprs[2] = current->thread.sys_call_table[nr](regs);
+ } else {
+ clear_pt_regs_flag(regs, PIF_SYSCALL_RET_SET);
+ }
+ syscall_exit_to_user_mode_work(regs);
+}
+
+void noinstr __do_syscall(struct pt_regs *regs, int per_trap)
+{
+ enter_from_user_mode(regs);
+
+ memcpy(&regs->gprs[8], S390_lowcore.save_area_sync, 8 * sizeof(unsigned long));
+ memcpy(&regs->int_code, &S390_lowcore.svc_ilc, sizeof(regs->int_code));
+ regs->psw = S390_lowcore.svc_old_psw;
+
+ update_timer_sys();
+
+ local_irq_enable();
+ regs->orig_gpr2 = regs->gprs[2];
+
+ if (per_trap)
+ set_thread_flag(TIF_PER_TRAP);
+
+ for (;;) {
+ regs->flags = 0;
+ set_pt_regs_flag(regs, PIF_SYSCALL);
+ do_syscall(regs);
+ if (!test_pt_regs_flag(regs, PIF_SYSCALL_RESTART))
+ break;
+ local_irq_enable();
+ }
+ exit_to_user_mode();
+}
diff --git a/arch/s390/kernel/time.c b/arch/s390/kernel/time.c
index c59cb44fbb7d..06bcfa636638 100644
--- a/arch/s390/kernel/time.c
+++ b/arch/s390/kernel/time.c
@@ -55,11 +55,7 @@
#include <asm/cio.h>
#include "entry.h"
-unsigned char tod_clock_base[16] __aligned(8) = {
- /* Force to data section. */
- 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
- 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
-};
+union tod_clock tod_clock_base __section(".data");
EXPORT_SYMBOL_GPL(tod_clock_base);
u64 clock_comparator_max = -1ULL;
@@ -86,7 +82,7 @@ void __init time_early_init(void)
struct ptff_qui qui;
/* Initialize TOD steering parameters */
- tod_steering_end = *(unsigned long long *) &tod_clock_base[1];
+ tod_steering_end = tod_clock_base.tod;
vdso_data->arch_data.tod_steering_end = tod_steering_end;
if (!test_facility(28))
@@ -113,18 +109,13 @@ unsigned long long notrace sched_clock(void)
}
NOKPROBE_SYMBOL(sched_clock);
-static void ext_to_timespec64(unsigned char *clk, struct timespec64 *xt)
+static void ext_to_timespec64(union tod_clock *clk, struct timespec64 *xt)
{
- unsigned long long high, low, rem, sec, nsec;
+ unsigned long rem, sec, nsec;
- /* Split extendnd TOD clock to micro-seconds and sub-micro-seconds */
- high = (*(unsigned long long *) clk) >> 4;
- low = (*(unsigned long long *)&clk[7]) << 4;
- /* Calculate seconds and nano-seconds */
- sec = high;
+ sec = clk->us;
rem = do_div(sec, 1000000);
- nsec = (((low >> 32) + (rem << 32)) * 1000) >> 32;
-
+ nsec = ((clk->sus + (rem << 12)) * 125) >> 9;
xt->tv_sec = sec;
xt->tv_nsec = nsec;
}
@@ -204,30 +195,26 @@ static void stp_reset(void);
void read_persistent_clock64(struct timespec64 *ts)
{
- unsigned char clk[STORE_CLOCK_EXT_SIZE];
- __u64 delta;
+ union tod_clock clk;
+ u64 delta;
delta = initial_leap_seconds + TOD_UNIX_EPOCH;
- get_tod_clock_ext(clk);
- *(__u64 *) &clk[1] -= delta;
- if (*(__u64 *) &clk[1] > delta)
- clk[0]--;
- ext_to_timespec64(clk, ts);
+ store_tod_clock_ext(&clk);
+ clk.eitod -= delta;
+ ext_to_timespec64(&clk, ts);
}
void __init read_persistent_wall_and_boot_offset(struct timespec64 *wall_time,
struct timespec64 *boot_offset)
{
- unsigned char clk[STORE_CLOCK_EXT_SIZE];
struct timespec64 boot_time;
- __u64 delta;
+ union tod_clock clk;
+ u64 delta;
delta = initial_leap_seconds + TOD_UNIX_EPOCH;
- memcpy(clk, tod_clock_base, STORE_CLOCK_EXT_SIZE);
- *(__u64 *)&clk[1] -= delta;
- if (*(__u64 *)&clk[1] > delta)
- clk[0]--;
- ext_to_timespec64(clk, &boot_time);
+ clk = tod_clock_base;
+ clk.eitod -= delta;
+ ext_to_timespec64(&clk, &boot_time);
read_persistent_clock64(wall_time);
*boot_offset = timespec64_sub(*wall_time, boot_time);
@@ -381,10 +368,7 @@ static void clock_sync_global(unsigned long long delta)
struct ptff_qto qto;
/* Fixup the monotonic sched clock. */
- *(unsigned long long *) &tod_clock_base[1] += delta;
- if (*(unsigned long long *) &tod_clock_base[1] < delta)
- /* Epoch overflow */
- tod_clock_base[0]++;
+ tod_clock_base.eitod += delta;
/* Adjust TOD steering parameters. */
now = get_tod_clock();
adj = tod_steering_end - now;
diff --git a/arch/s390/kernel/traps.c b/arch/s390/kernel/traps.c
index 8d1e8a1a97df..db7dd59b570c 100644
--- a/arch/s390/kernel/traps.c
+++ b/arch/s390/kernel/traps.c
@@ -13,6 +13,8 @@
* 'Traps.c' handles hardware traps and faults after we have saved some
* state in 'asm.s'.
*/
+#include "asm/irqflags.h"
+#include "asm/ptrace.h"
#include <linux/kprobes.h>
#include <linux/kdebug.h>
#include <linux/extable.h>
@@ -23,7 +25,9 @@
#include <linux/slab.h>
#include <linux/uaccess.h>
#include <linux/cpu.h>
+#include <linux/entry-common.h>
#include <asm/fpu/api.h>
+#include <asm/vtime.h>
#include "entry.h"
static inline void __user *get_trap_ip(struct pt_regs *regs)
@@ -288,3 +292,64 @@ void __init trap_init(void)
local_mcck_enable();
test_monitor_call();
}
+
+void noinstr __do_pgm_check(struct pt_regs *regs)
+{
+ unsigned long last_break = S390_lowcore.breaking_event_addr;
+ unsigned int trapnr, syscall_redirect = 0;
+ irqentry_state_t state;
+
+ regs->int_code = *(u32 *)&S390_lowcore.pgm_ilc;
+ regs->int_parm_long = S390_lowcore.trans_exc_code;
+
+ state = irqentry_enter(regs);
+
+ if (user_mode(regs)) {
+ update_timer_sys();
+ if (last_break < 4096)
+ last_break = 1;
+ current->thread.last_break = last_break;
+ regs->args[0] = last_break;
+ }
+
+ if (S390_lowcore.pgm_code & 0x0200) {
+ /* transaction abort */
+ memcpy(&current->thread.trap_tdb, &S390_lowcore.pgm_tdb, 256);
+ }
+
+ if (S390_lowcore.pgm_code & PGM_INT_CODE_PER) {
+ if (user_mode(regs)) {
+ struct per_event *ev = &current->thread.per_event;
+
+ set_thread_flag(TIF_PER_TRAP);
+ ev->address = S390_lowcore.per_address;
+ ev->cause = *(u16 *)&S390_lowcore.per_code;
+ ev->paid = S390_lowcore.per_access_id;
+ } else {
+ /* PER event in kernel is kprobes */
+ __arch_local_irq_ssm(regs->psw.mask & ~PSW_MASK_PER);
+ do_per_trap(regs);
+ goto out;
+ }
+ }
+
+ if (!irqs_disabled_flags(regs->psw.mask))
+ trace_hardirqs_on();
+ __arch_local_irq_ssm(regs->psw.mask & ~PSW_MASK_PER);
+
+ trapnr = regs->int_code & PGM_INT_CODE_MASK;
+ if (trapnr)
+ pgm_check_table[trapnr](regs);
+ syscall_redirect = user_mode(regs) && test_pt_regs_flag(regs, PIF_SYSCALL);
+out:
+ local_irq_disable();
+ irqentry_exit(regs, state);
+
+ if (syscall_redirect) {
+ enter_from_user_mode(regs);
+ local_irq_enable();
+ regs->orig_gpr2 = regs->gprs[2];
+ do_syscall(regs);
+ exit_to_user_mode();
+ }
+}
diff --git a/arch/s390/kernel/uprobes.c b/arch/s390/kernel/uprobes.c
index 5007fac01bb5..bbf8622bbf5d 100644
--- a/arch/s390/kernel/uprobes.c
+++ b/arch/s390/kernel/uprobes.c
@@ -32,7 +32,7 @@ int arch_uprobe_pre_xol(struct arch_uprobe *auprobe, struct pt_regs *regs)
return -EINVAL;
if (!is_compat_task() && psw_bits(regs->psw).eaba == PSW_BITS_AMODE_31BIT)
return -EINVAL;
- clear_pt_regs_flag(regs, PIF_PER_TRAP);
+ clear_thread_flag(TIF_PER_TRAP);
auprobe->saved_per = psw_bits(regs->psw).per;
auprobe->saved_int_code = regs->int_code;
regs->int_code = UPROBE_TRAP_NR;
@@ -103,7 +103,7 @@ int arch_uprobe_post_xol(struct arch_uprobe *auprobe, struct pt_regs *regs)
/* fix per address */
current->thread.per_event.address = utask->vaddr;
/* trigger per event */
- set_pt_regs_flag(regs, PIF_PER_TRAP);
+ set_thread_flag(TIF_PER_TRAP);
}
return 0;
}
@@ -259,7 +259,7 @@ static void sim_stor_event(struct pt_regs *regs, void *addr, int len)
return;
current->thread.per_event.address = regs->psw.addr;
current->thread.per_event.cause = PER_EVENT_STORE >> 16;
- set_pt_regs_flag(regs, PIF_PER_TRAP);
+ set_thread_flag(TIF_PER_TRAP);
}
/*
diff --git a/arch/s390/kernel/vdso.c b/arch/s390/kernel/vdso.c
index 8bc269c55fd3..8c4e07d533c8 100644
--- a/arch/s390/kernel/vdso.c
+++ b/arch/s390/kernel/vdso.c
@@ -6,186 +6,226 @@
* Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com)
*/
-#include <linux/init.h>
+#include <linux/binfmts.h>
+#include <linux/compat.h>
+#include <linux/elf.h>
#include <linux/errno.h>
-#include <linux/sched.h>
+#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/mm.h>
-#include <linux/smp.h>
-#include <linux/stddef.h>
-#include <linux/unistd.h>
#include <linux/slab.h>
-#include <linux/user.h>
-#include <linux/elf.h>
-#include <linux/security.h>
-#include <linux/memblock.h>
-#include <linux/compat.h>
-#include <linux/binfmts.h>
+#include <linux/smp.h>
+#include <linux/time_namespace.h>
#include <vdso/datapage.h>
-#include <asm/asm-offsets.h>
-#include <asm/processor.h>
-#include <asm/mmu.h>
-#include <asm/mmu_context.h>
-#include <asm/sections.h>
#include <asm/vdso.h>
-#include <asm/facility.h>
-#include <asm/timex.h>
-extern char vdso64_start, vdso64_end;
-static void *vdso64_kbase = &vdso64_start;
-static unsigned int vdso64_pages;
-static struct page **vdso64_pagelist;
+extern char vdso64_start[], vdso64_end[];
+static unsigned int vdso_pages;
+
+static struct vm_special_mapping vvar_mapping;
+
+static union {
+ struct vdso_data data[CS_BASES];
+ u8 page[PAGE_SIZE];
+} vdso_data_store __page_aligned_data;
+
+struct vdso_data *vdso_data = vdso_data_store.data;
+
+enum vvar_pages {
+ VVAR_DATA_PAGE_OFFSET,
+ VVAR_TIMENS_PAGE_OFFSET,
+ VVAR_NR_PAGES,
+};
-/*
- * Should the kernel map a VDSO page into processes and pass its
- * address down to glibc upon exec()?
- */
unsigned int __read_mostly vdso_enabled = 1;
-static vm_fault_t vdso_fault(const struct vm_special_mapping *sm,
- struct vm_area_struct *vma, struct vm_fault *vmf)
+static int __init vdso_setup(char *str)
+{
+ bool enabled;
+
+ if (!kstrtobool(str, &enabled))
+ vdso_enabled = enabled;
+ return 1;
+}
+__setup("vdso=", vdso_setup);
+
+#ifdef CONFIG_TIME_NS
+struct vdso_data *arch_get_vdso_data(void *vvar_page)
+{
+ return (struct vdso_data *)(vvar_page);
+}
+
+static struct page *find_timens_vvar_page(struct vm_area_struct *vma)
{
- struct page **vdso_pagelist;
- unsigned long vdso_pages;
+ if (likely(vma->vm_mm == current->mm))
+ return current->nsproxy->time_ns->vvar_page;
+ /*
+ * VM_PFNMAP | VM_IO protect .fault() handler from being called
+ * through interfaces like /proc/$pid/mem or
+ * process_vm_{readv,writev}() as long as there's no .access()
+ * in special_mapping_vmops().
+ * For more details check_vma_flags() and __access_remote_vm()
+ */
+ WARN(1, "vvar_page accessed remotely");
+ return NULL;
+}
- vdso_pagelist = vdso64_pagelist;
- vdso_pages = vdso64_pages;
+/*
+ * The VVAR page layout depends on whether a task belongs to the root or
+ * non-root time namespace. Whenever a task changes its namespace, the VVAR
+ * page tables are cleared and then they will be re-faulted with a
+ * corresponding layout.
+ * See also the comment near timens_setup_vdso_data() for details.
+ */
+int vdso_join_timens(struct task_struct *task, struct time_namespace *ns)
+{
+ struct mm_struct *mm = task->mm;
+ struct vm_area_struct *vma;
- if (vmf->pgoff >= vdso_pages)
- return VM_FAULT_SIGBUS;
+ mmap_read_lock(mm);
+ for (vma = mm->mmap; vma; vma = vma->vm_next) {
+ unsigned long size = vma->vm_end - vma->vm_start;
- vmf->page = vdso_pagelist[vmf->pgoff];
- get_page(vmf->page);
+ if (!vma_is_special_mapping(vma, &vvar_mapping))
+ continue;
+ zap_page_range(vma, vma->vm_start, size);
+ break;
+ }
+ mmap_read_unlock(mm);
return 0;
}
+#else
+static inline struct page *find_timens_vvar_page(struct vm_area_struct *vma)
+{
+ return NULL;
+}
+#endif
+
+static vm_fault_t vvar_fault(const struct vm_special_mapping *sm,
+ struct vm_area_struct *vma, struct vm_fault *vmf)
+{
+ struct page *timens_page = find_timens_vvar_page(vma);
+ unsigned long addr, pfn;
+ vm_fault_t err;
+
+ switch (vmf->pgoff) {
+ case VVAR_DATA_PAGE_OFFSET:
+ pfn = virt_to_pfn(vdso_data);
+ if (timens_page) {
+ /*
+ * Fault in VVAR page too, since it will be accessed
+ * to get clock data anyway.
+ */
+ addr = vmf->address + VVAR_TIMENS_PAGE_OFFSET * PAGE_SIZE;
+ err = vmf_insert_pfn(vma, addr, pfn);
+ if (unlikely(err & VM_FAULT_ERROR))
+ return err;
+ pfn = page_to_pfn(timens_page);
+ }
+ break;
+#ifdef CONFIG_TIME_NS
+ case VVAR_TIMENS_PAGE_OFFSET:
+ /*
+ * If a task belongs to a time namespace then a namespace
+ * specific VVAR is mapped with the VVAR_DATA_PAGE_OFFSET and
+ * the real VVAR page is mapped with the VVAR_TIMENS_PAGE_OFFSET
+ * offset.
+ * See also the comment near timens_setup_vdso_data().
+ */
+ if (!timens_page)
+ return VM_FAULT_SIGBUS;
+ pfn = virt_to_pfn(vdso_data);
+ break;
+#endif /* CONFIG_TIME_NS */
+ default:
+ return VM_FAULT_SIGBUS;
+ }
+ return vmf_insert_pfn(vma, vmf->address, pfn);
+}
static int vdso_mremap(const struct vm_special_mapping *sm,
struct vm_area_struct *vma)
{
current->mm->context.vdso_base = vma->vm_start;
-
return 0;
}
-static const struct vm_special_mapping vdso_mapping = {
+static struct vm_special_mapping vvar_mapping = {
+ .name = "[vvar]",
+ .fault = vvar_fault,
+};
+
+static struct vm_special_mapping vdso_mapping = {
.name = "[vdso]",
- .fault = vdso_fault,
.mremap = vdso_mremap,
};
-static int __init vdso_setup(char *str)
-{
- bool enabled;
-
- if (!kstrtobool(str, &enabled))
- vdso_enabled = enabled;
- return 1;
-}
-__setup("vdso=", vdso_setup);
-
-/*
- * The vdso data page
- */
-static union {
- struct vdso_data data;
- u8 page[PAGE_SIZE];
-} vdso_data_store __page_aligned_data;
-struct vdso_data *vdso_data = (struct vdso_data *)&vdso_data_store.data;
-
-void vdso_getcpu_init(void)
+int vdso_getcpu_init(void)
{
set_tod_programmable_field(smp_processor_id());
+ return 0;
}
+early_initcall(vdso_getcpu_init); /* Must be called before SMP init */
-/*
- * This is called from binfmt_elf, we create the special vma for the
- * vDSO and insert it into the mm struct tree
- */
int arch_setup_additional_pages(struct linux_binprm *bprm, int uses_interp)
{
+ unsigned long vdso_text_len, vdso_mapping_len;
+ unsigned long vvar_start, vdso_text_start;
struct mm_struct *mm = current->mm;
struct vm_area_struct *vma;
- unsigned long vdso_pages;
- unsigned long vdso_base;
int rc;
- if (!vdso_enabled)
- return 0;
-
- if (is_compat_task())
- return 0;
-
- vdso_pages = vdso64_pages;
- /*
- * vDSO has a problem and was disabled, just don't "enable" it for
- * the process
- */
- if (vdso_pages == 0)
+ BUILD_BUG_ON(VVAR_NR_PAGES != __VVAR_PAGES);
+ if (!vdso_enabled || is_compat_task())
return 0;
-
- /*
- * pick a base address for the vDSO in process space. We try to put
- * it at vdso_base which is the "natural" base for it, but we might
- * fail and end up putting it elsewhere.
- */
if (mmap_write_lock_killable(mm))
return -EINTR;
- vdso_base = get_unmapped_area(NULL, 0, vdso_pages << PAGE_SHIFT, 0, 0);
- if (IS_ERR_VALUE(vdso_base)) {
- rc = vdso_base;
- goto out_up;
- }
-
- /*
- * our vma flags don't have VM_WRITE so by default, the process
- * isn't allowed to write those pages.
- * gdb can break that with ptrace interface, and thus trigger COW
- * on those pages but it's then your responsibility to never do that
- * on the "data" page of the vDSO or you'll stop getting kernel
- * updates and your nice userland gettimeofday will be totally dead.
- * It's fine to use that for setting breakpoints in the vDSO code
- * pages though.
- */
- vma = _install_special_mapping(mm, vdso_base, vdso_pages << PAGE_SHIFT,
+ vdso_text_len = vdso_pages << PAGE_SHIFT;
+ vdso_mapping_len = vdso_text_len + VVAR_NR_PAGES * PAGE_SIZE;
+ vvar_start = get_unmapped_area(NULL, 0, vdso_mapping_len, 0, 0);
+ rc = vvar_start;
+ if (IS_ERR_VALUE(vvar_start))
+ goto out;
+ vma = _install_special_mapping(mm, vvar_start, VVAR_NR_PAGES*PAGE_SIZE,
+ VM_READ|VM_MAYREAD|VM_IO|VM_DONTDUMP|
+ VM_PFNMAP,
+ &vvar_mapping);
+ rc = PTR_ERR(vma);
+ if (IS_ERR(vma))
+ goto out;
+ vdso_text_start = vvar_start + VVAR_NR_PAGES * PAGE_SIZE;
+ /* VM_MAYWRITE for COW so gdb can set breakpoints */
+ vma = _install_special_mapping(mm, vdso_text_start, vdso_text_len,
VM_READ|VM_EXEC|
VM_MAYREAD|VM_MAYWRITE|VM_MAYEXEC,
&vdso_mapping);
if (IS_ERR(vma)) {
+ do_munmap(mm, vvar_start, PAGE_SIZE, NULL);
rc = PTR_ERR(vma);
- goto out_up;
+ } else {
+ current->mm->context.vdso_base = vdso_text_start;
+ rc = 0;
}
-
- current->mm->context.vdso_base = vdso_base;
- rc = 0;
-
-out_up:
+out:
mmap_write_unlock(mm);
return rc;
}
static int __init vdso_init(void)
{
+ struct page **pages;
int i;
- vdso_getcpu_init();
- /* Calculate the size of the 64 bit vDSO */
- vdso64_pages = ((&vdso64_end - &vdso64_start
- + PAGE_SIZE - 1) >> PAGE_SHIFT) + 1;
-
- /* Make sure pages are in the correct state */
- vdso64_pagelist = kcalloc(vdso64_pages + 1, sizeof(struct page *),
- GFP_KERNEL);
- BUG_ON(vdso64_pagelist == NULL);
- for (i = 0; i < vdso64_pages - 1; i++) {
- struct page *pg = virt_to_page(vdso64_kbase + i*PAGE_SIZE);
- get_page(pg);
- vdso64_pagelist[i] = pg;
+ vdso_pages = (vdso64_end - vdso64_start) >> PAGE_SHIFT;
+ pages = kcalloc(vdso_pages + 1, sizeof(struct page *), GFP_KERNEL);
+ if (!pages) {
+ vdso_enabled = 0;
+ return -ENOMEM;
}
- vdso64_pagelist[vdso64_pages - 1] = virt_to_page(vdso_data);
- vdso64_pagelist[vdso64_pages] = NULL;
-
- get_page(virt_to_page(vdso_data));
-
+ for (i = 0; i < vdso_pages; i++)
+ pages[i] = virt_to_page(vdso64_start + i * PAGE_SIZE);
+ pages[vdso_pages] = NULL;
+ vdso_mapping.pages = pages;
return 0;
}
-early_initcall(vdso_init);
+arch_initcall(vdso_init);
diff --git a/arch/s390/kernel/vdso64/getcpu.c b/arch/s390/kernel/vdso64/getcpu.c
index 5b2bc7494d5b..5c5d4a848b76 100644
--- a/arch/s390/kernel/vdso64/getcpu.c
+++ b/arch/s390/kernel/vdso64/getcpu.c
@@ -8,12 +8,12 @@
int __s390_vdso_getcpu(unsigned *cpu, unsigned *node, struct getcpu_cache *unused)
{
- __u16 todval[8];
+ union tod_clock clk;
/* CPU number is stored in the programmable field of the TOD clock */
- get_tod_clock_ext((char *)todval);
+ store_tod_clock_ext(&clk);
if (cpu)
- *cpu = todval[7];
+ *cpu = clk.pf;
/* NUMA node is always zero */
if (node)
*node = 0;
diff --git a/arch/s390/kernel/vdso64/vdso64.lds.S b/arch/s390/kernel/vdso64/vdso64.lds.S
index 7bde3909290f..518f1ea405f4 100644
--- a/arch/s390/kernel/vdso64/vdso64.lds.S
+++ b/arch/s390/kernel/vdso64/vdso64.lds.S
@@ -13,6 +13,10 @@ ENTRY(_start)
SECTIONS
{
+ PROVIDE(_vdso_data = . - __VVAR_PAGES * PAGE_SIZE);
+#ifdef CONFIG_TIME_NS
+ PROVIDE(_timens_data = _vdso_data + PAGE_SIZE);
+#endif
. = VDSO64_LBASE + SIZEOF_HEADERS;
.hash : { *(.hash) } :text
@@ -94,9 +98,6 @@ SECTIONS
.debug_ranges 0 : { *(.debug_ranges) }
.gnu.attributes 0 : { KEEP (*(.gnu.attributes)) }
- . = ALIGN(PAGE_SIZE);
- PROVIDE(_vdso_data = .);
-
/DISCARD/ : {
*(.note.GNU-stack)
*(.branch_lt)
diff --git a/arch/s390/kernel/vtime.c b/arch/s390/kernel/vtime.c
index 5aaa2ca6a928..73c7afcc0527 100644
--- a/arch/s390/kernel/vtime.c
+++ b/arch/s390/kernel/vtime.c
@@ -13,7 +13,7 @@
#include <linux/timex.h>
#include <linux/types.h>
#include <linux/time.h>
-
+#include <asm/alternative.h>
#include <asm/vtimer.h>
#include <asm/vtime.h>
#include <asm/cpu_mf.h>
@@ -128,15 +128,13 @@ static int do_account_vtime(struct task_struct *tsk)
timer = S390_lowcore.last_update_timer;
clock = S390_lowcore.last_update_clock;
- asm volatile(
- " stpt %0\n" /* Store current cpu timer value */
-#ifdef CONFIG_HAVE_MARCH_Z9_109_FEATURES
- " stckf %1" /* Store current tod clock value */
-#else
- " stck %1" /* Store current tod clock value */
-#endif
- : "=Q" (S390_lowcore.last_update_timer),
- "=Q" (S390_lowcore.last_update_clock));
+ /* Use STORE CLOCK by default, STORE CLOCK FAST if available. */
+ alternative_io("stpt %0\n .insn s,0xb2050000,%1\n",
+ "stpt %0\n .insn s,0xb27c0000,%1\n",
+ 25,
+ ASM_OUTPUT2("=Q" (S390_lowcore.last_update_timer),
+ "=Q" (S390_lowcore.last_update_clock)),
+ ASM_NO_INPUT_CLOBBER("cc"));
clock = S390_lowcore.last_update_clock - clock;
timer -= S390_lowcore.last_update_timer;
diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index dbafd057ca6a..2f09e9d7dc95 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -45,6 +45,7 @@
#include <asm/timex.h>
#include <asm/ap.h>
#include <asm/uv.h>
+#include <asm/fpu/api.h>
#include "kvm-s390.h"
#include "gaccess.h"
@@ -164,12 +165,6 @@ struct kvm_stats_debugfs_item debugfs_entries[] = {
{ NULL }
};
-struct kvm_s390_tod_clock_ext {
- __u8 epoch_idx;
- __u64 tod;
- __u8 reserved[7];
-} __packed;
-
/* allow nested virtualization in KVM (if enabled by user space) */
static int nested;
module_param(nested, int, S_IRUGO);
@@ -1165,17 +1160,17 @@ static int kvm_s390_set_tod(struct kvm *kvm, struct kvm_device_attr *attr)
static void kvm_s390_get_tod_clock(struct kvm *kvm,
struct kvm_s390_vm_tod_clock *gtod)
{
- struct kvm_s390_tod_clock_ext htod;
+ union tod_clock clk;
preempt_disable();
- get_tod_clock_ext((char *)&htod);
+ store_tod_clock_ext(&clk);
- gtod->tod = htod.tod + kvm->arch.epoch;
+ gtod->tod = clk.tod + kvm->arch.epoch;
gtod->epoch_idx = 0;
if (test_kvm_facility(kvm, 139)) {
- gtod->epoch_idx = htod.epoch_idx + kvm->arch.epdx;
- if (gtod->tod < htod.tod)
+ gtod->epoch_idx = clk.ei + kvm->arch.epdx;
+ if (gtod->tod < clk.tod)
gtod->epoch_idx += 1;
}
@@ -3866,18 +3861,18 @@ void kvm_s390_set_tod_clock(struct kvm *kvm,
const struct kvm_s390_vm_tod_clock *gtod)
{
struct kvm_vcpu *vcpu;
- struct kvm_s390_tod_clock_ext htod;
+ union tod_clock clk;
int i;
mutex_lock(&kvm->lock);
preempt_disable();
- get_tod_clock_ext((char *)&htod);
+ store_tod_clock_ext(&clk);
- kvm->arch.epoch = gtod->tod - htod.tod;
+ kvm->arch.epoch = gtod->tod - clk.tod;
kvm->arch.epdx = 0;
if (test_kvm_facility(kvm, 139)) {
- kvm->arch.epdx = gtod->epoch_idx - htod.epoch_idx;
+ kvm->arch.epdx = gtod->epoch_idx - clk.ei;
if (kvm->arch.epoch > gtod->tod)
kvm->arch.epdx -= 1;
}
@@ -4147,6 +4142,8 @@ static int __vcpu_run(struct kvm_vcpu *vcpu)
vcpu->run->s.regs.gprs,
sizeof(sie_page->pv_grregs));
}
+ if (test_cpu_flag(CIF_FPU))
+ load_fpu_regs();
exit_reason = sie64a(vcpu->arch.sie_block,
vcpu->run->s.regs.gprs);
if (kvm_s390_pv_cpu_is_protected(vcpu)) {
diff --git a/arch/s390/kvm/vsie.c b/arch/s390/kvm/vsie.c
index c5d0a58b2c29..bd803e091918 100644
--- a/arch/s390/kvm/vsie.c
+++ b/arch/s390/kvm/vsie.c
@@ -18,6 +18,7 @@
#include <asm/sclp.h>
#include <asm/nmi.h>
#include <asm/dis.h>
+#include <asm/fpu/api.h>
#include "kvm-s390.h"
#include "gaccess.h"
@@ -1028,6 +1029,8 @@ static int do_vsie_run(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page)
*/
vcpu->arch.sie_block->prog0c |= PROG_IN_SIE;
barrier();
+ if (test_cpu_flag(CIF_FPU))
+ load_fpu_regs();
if (!kvm_s390_vcpu_sie_inhibited(vcpu))
rc = sie64a(scb_s, vcpu->run->s.regs.gprs);
barrier();
diff --git a/arch/s390/lib/uaccess.c b/arch/s390/lib/uaccess.c
index e8f642446fed..2fece1fd210a 100644
--- a/arch/s390/lib/uaccess.c
+++ b/arch/s390/lib/uaccess.c
@@ -16,8 +16,8 @@
#include <asm/mmu_context.h>
#include <asm/facility.h>
-#ifdef CONFIG_DEBUG_USER_ASCE
-void debug_user_asce(void)
+#ifdef CONFIG_DEBUG_ENTRY
+void debug_user_asce(int exit)
{
unsigned long cr1, cr7;
@@ -25,12 +25,14 @@ void debug_user_asce(void)
__ctl_store(cr7, 7, 7);
if (cr1 == S390_lowcore.kernel_asce && cr7 == S390_lowcore.user_asce)
return;
- panic("incorrect ASCE on kernel exit\n"
+ panic("incorrect ASCE on kernel %s\n"
"cr1: %016lx cr7: %016lx\n"
"kernel: %016llx user: %016llx\n",
- cr1, cr7, S390_lowcore.kernel_asce, S390_lowcore.user_asce);
+ exit ? "exit" : "entry", cr1, cr7,
+ S390_lowcore.kernel_asce, S390_lowcore.user_asce);
+
}
-#endif /*CONFIG_DEBUG_USER_ASCE */
+#endif /*CONFIG_DEBUG_ENTRY */
#ifndef CONFIG_HAVE_MARCH_Z10_FEATURES
static DEFINE_STATIC_KEY_FALSE(have_mvcos);
diff --git a/arch/s390/mm/fault.c b/arch/s390/mm/fault.c
index b8210103de14..e30c7c781172 100644
--- a/arch/s390/mm/fault.c
+++ b/arch/s390/mm/fault.c
@@ -385,7 +385,7 @@ static inline vm_fault_t do_exception(struct pt_regs *regs, int access)
* The instruction that caused the program check has
* been nullified. Don't signal single step via SIGTRAP.
*/
- clear_pt_regs_flag(regs, PIF_PER_TRAP);
+ clear_thread_flag(TIF_PER_TRAP);
if (kprobe_page_fault(regs, 14))
return 0;
diff --git a/arch/s390/pci/pci.c b/arch/s390/pci/pci.c
index 41df8fcfddde..600881d894dd 100644
--- a/arch/s390/pci/pci.c
+++ b/arch/s390/pci/pci.c
@@ -695,43 +695,68 @@ void zpci_remove_device(struct zpci_dev *zdev)
}
}
-int zpci_create_device(struct zpci_dev *zdev)
+/**
+ * zpci_create_device() - Create a new zpci_dev and add it to the zbus
+ * @fid: Function ID of the device to be created
+ * @fh: Current Function Handle of the device to be created
+ * @state: Initial state after creation either Standby or Configured
+ *
+ * Creates a new zpci device and adds it to its, possibly newly created, zbus
+ * as well as zpci_list.
+ *
+ * Returns: 0 on success, an error value otherwise
+ */
+int zpci_create_device(u32 fid, u32 fh, enum zpci_state state)
{
+ struct zpci_dev *zdev;
int rc;
- kref_init(&zdev->kref);
+ zpci_dbg(3, "add fid:%x, fh:%x, c:%d\n", fid, fh, state);
+ zdev = kzalloc(sizeof(*zdev), GFP_KERNEL);
+ if (!zdev)
+ return -ENOMEM;
- spin_lock(&zpci_list_lock);
- list_add_tail(&zdev->entry, &zpci_list);
- spin_unlock(&zpci_list_lock);
+ /* FID and Function Handle are the static/dynamic identifiers */
+ zdev->fid = fid;
+ zdev->fh = fh;
- rc = zpci_init_iommu(zdev);
+ /* Query function properties and update zdev */
+ rc = clp_query_pci_fn(zdev);
if (rc)
- goto out;
+ goto error;
+ zdev->state = state;
+ kref_init(&zdev->kref);
mutex_init(&zdev->lock);
+
+ rc = zpci_init_iommu(zdev);
+ if (rc)
+ goto error;
+
if (zdev->state == ZPCI_FN_STATE_CONFIGURED) {
rc = zpci_enable_device(zdev);
if (rc)
- goto out_destroy_iommu;
+ goto error_destroy_iommu;
}
rc = zpci_bus_device_register(zdev, &pci_root_ops);
if (rc)
- goto out_disable;
+ goto error_disable;
+
+ spin_lock(&zpci_list_lock);
+ list_add_tail(&zdev->entry, &zpci_list);
+ spin_unlock(&zpci_list_lock);
return 0;
-out_disable:
+error_disable:
if (zdev->state == ZPCI_FN_STATE_ONLINE)
zpci_disable_device(zdev);
-
-out_destroy_iommu:
+error_destroy_iommu:
zpci_destroy_iommu(zdev);
-out:
- spin_lock(&zpci_list_lock);
- list_del(&zdev->entry);
- spin_unlock(&zpci_list_lock);
+error:
+ zpci_dbg(0, "add fid:%x, rc:%d\n", fid, rc);
+ kfree(zdev);
return rc;
}
diff --git a/arch/s390/pci/pci_clp.c b/arch/s390/pci/pci_clp.c
index 153720d21ae7..d3331596ddbe 100644
--- a/arch/s390/pci/pci_clp.c
+++ b/arch/s390/pci/pci_clp.c
@@ -181,7 +181,7 @@ static int clp_store_query_pci_fn(struct zpci_dev *zdev,
return 0;
}
-static int clp_query_pci_fn(struct zpci_dev *zdev, u32 fh)
+int clp_query_pci_fn(struct zpci_dev *zdev)
{
struct clp_req_rsp_query_pci *rrb;
int rc;
@@ -194,7 +194,7 @@ static int clp_query_pci_fn(struct zpci_dev *zdev, u32 fh)
rrb->request.hdr.len = sizeof(rrb->request);
rrb->request.hdr.cmd = CLP_QUERY_PCI_FN;
rrb->response.hdr.len = sizeof(rrb->response);
- rrb->request.fh = fh;
+ rrb->request.fh = zdev->fh;
rc = clp_req(rrb, CLP_LPS_PCI);
if (!rc && rrb->response.hdr.rsp == CLP_RC_OK) {
@@ -212,40 +212,6 @@ out:
return rc;
}
-int clp_add_pci_device(u32 fid, u32 fh, int configured)
-{
- struct zpci_dev *zdev;
- int rc = -ENOMEM;
-
- zpci_dbg(3, "add fid:%x, fh:%x, c:%d\n", fid, fh, configured);
- zdev = kzalloc(sizeof(*zdev), GFP_KERNEL);
- if (!zdev)
- goto error;
-
- zdev->fh = fh;
- zdev->fid = fid;
-
- /* Query function properties and update zdev */
- rc = clp_query_pci_fn(zdev, fh);
- if (rc)
- goto error;
-
- if (configured)
- zdev->state = ZPCI_FN_STATE_CONFIGURED;
- else
- zdev->state = ZPCI_FN_STATE_STANDBY;
-
- rc = zpci_create_device(zdev);
- if (rc)
- goto error;
- return 0;
-
-error:
- zpci_dbg(0, "add fid:%x, rc:%d\n", fid, rc);
- kfree(zdev);
- return rc;
-}
-
static int clp_refresh_fh(u32 fid);
/*
* Enable/Disable a given PCI function and update its function handle if
@@ -408,7 +374,7 @@ static void __clp_add(struct clp_fh_list_entry *entry, void *data)
zdev = get_zdev_by_fid(entry->fid);
if (!zdev)
- clp_add_pci_device(entry->fid, entry->fh, entry->config_state);
+ zpci_create_device(entry->fid, entry->fh, entry->config_state);
}
int clp_scan_pci_devices(void)
diff --git a/arch/s390/pci/pci_event.c b/arch/s390/pci/pci_event.c
index 9a6bae503fe6..b4162da4e8a2 100644
--- a/arch/s390/pci/pci_event.c
+++ b/arch/s390/pci/pci_event.c
@@ -80,7 +80,7 @@ static void __zpci_event_availability(struct zpci_ccdf_avail *ccdf)
enum zpci_state state;
int ret;
- if (zdev && zdev->zbus && zdev->zbus->bus)
+ if (zdev && zdev->zbus->bus)
pdev = pci_get_slot(zdev->zbus->bus, zdev->devfn);
zpci_err("avail CCDF:\n");
@@ -89,7 +89,7 @@ static void __zpci_event_availability(struct zpci_ccdf_avail *ccdf)
switch (ccdf->pec) {
case 0x0301: /* Reserved|Standby -> Configured */
if (!zdev) {
- ret = clp_add_pci_device(ccdf->fid, ccdf->fh, 1);
+ zpci_create_device(ccdf->fid, ccdf->fh, ZPCI_FN_STATE_CONFIGURED);
break;
}
/* the configuration request may be stale */
@@ -116,7 +116,7 @@ static void __zpci_event_availability(struct zpci_ccdf_avail *ccdf)
break;
case 0x0302: /* Reserved -> Standby */
if (!zdev) {
- clp_add_pci_device(ccdf->fid, ccdf->fh, 0);
+ zpci_create_device(ccdf->fid, ccdf->fh, ZPCI_FN_STATE_STANDBY);
break;
}
zdev->fh = ccdf->fh;