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-rw-r--r--arch/loongarch/configs/loongson3_defconfig2
-rw-r--r--arch/loongarch/include/asm/asm-prototypes.h8
-rw-r--r--arch/loongarch/include/asm/kvm_host.h2
-rw-r--r--arch/loongarch/include/asm/kvm_vcpu.h2
-rw-r--r--arch/loongarch/kernel/entry.S22
-rw-r--r--arch/loongarch/kernel/perf_event.c3
-rw-r--r--arch/loongarch/kernel/process.c33
-rw-r--r--arch/loongarch/kvm/exit.c37
-rw-r--r--arch/loongarch/kvm/mmu.c15
-rw-r--r--arch/loongarch/lib/crc32-loongarch.c4
10 files changed, 82 insertions, 46 deletions
diff --git a/arch/loongarch/configs/loongson3_defconfig b/arch/loongarch/configs/loongson3_defconfig
index 90f21dfe22b1..0d59af6007b7 100644
--- a/arch/loongarch/configs/loongson3_defconfig
+++ b/arch/loongarch/configs/loongson3_defconfig
@@ -1026,7 +1026,7 @@ CONFIG_SECURITY_APPARMOR=y
CONFIG_SECURITY_YAMA=y
CONFIG_DEFAULT_SECURITY_DAC=y
CONFIG_CRYPTO_USER=m
-# CONFIG_CRYPTO_MANAGER_DISABLE_TESTS is not set
+CONFIG_CRYPTO_SELFTESTS=y
CONFIG_CRYPTO_PCRYPT=m
CONFIG_CRYPTO_CRYPTD=m
CONFIG_CRYPTO_ANUBIS=m
diff --git a/arch/loongarch/include/asm/asm-prototypes.h b/arch/loongarch/include/asm/asm-prototypes.h
index 51f224bcfc65..704066b4f736 100644
--- a/arch/loongarch/include/asm/asm-prototypes.h
+++ b/arch/loongarch/include/asm/asm-prototypes.h
@@ -12,3 +12,11 @@ __int128_t __ashlti3(__int128_t a, int b);
__int128_t __ashrti3(__int128_t a, int b);
__int128_t __lshrti3(__int128_t a, int b);
#endif
+
+asmlinkage void noinstr __no_stack_protector ret_from_fork(struct task_struct *prev,
+ struct pt_regs *regs);
+
+asmlinkage void noinstr __no_stack_protector ret_from_kernel_thread(struct task_struct *prev,
+ struct pt_regs *regs,
+ int (*fn)(void *),
+ void *fn_arg);
diff --git a/arch/loongarch/include/asm/kvm_host.h b/arch/loongarch/include/asm/kvm_host.h
index f457c2662e2f..a3c4cc46c892 100644
--- a/arch/loongarch/include/asm/kvm_host.h
+++ b/arch/loongarch/include/asm/kvm_host.h
@@ -301,7 +301,7 @@ int kvm_arch_vcpu_dump_regs(struct kvm_vcpu *vcpu);
/* MMU handling */
void kvm_flush_tlb_all(void);
void kvm_flush_tlb_gpa(struct kvm_vcpu *vcpu, unsigned long gpa);
-int kvm_handle_mm_fault(struct kvm_vcpu *vcpu, unsigned long badv, bool write);
+int kvm_handle_mm_fault(struct kvm_vcpu *vcpu, unsigned long badv, bool write, int ecode);
int kvm_unmap_hva_range(struct kvm *kvm, unsigned long start, unsigned long end, bool blockable);
int kvm_age_hva(struct kvm *kvm, unsigned long start, unsigned long end);
diff --git a/arch/loongarch/include/asm/kvm_vcpu.h b/arch/loongarch/include/asm/kvm_vcpu.h
index 2c349f961bfb..f1efd7cfbc20 100644
--- a/arch/loongarch/include/asm/kvm_vcpu.h
+++ b/arch/loongarch/include/asm/kvm_vcpu.h
@@ -37,7 +37,7 @@
#define KVM_LOONGSON_IRQ_NUM_MASK 0xffff
typedef union loongarch_instruction larch_inst;
-typedef int (*exit_handle_fn)(struct kvm_vcpu *);
+typedef int (*exit_handle_fn)(struct kvm_vcpu *, int);
int kvm_emu_mmio_read(struct kvm_vcpu *vcpu, larch_inst inst);
int kvm_emu_mmio_write(struct kvm_vcpu *vcpu, larch_inst inst);
diff --git a/arch/loongarch/kernel/entry.S b/arch/loongarch/kernel/entry.S
index 48e7e34e355e..2abc29e57381 100644
--- a/arch/loongarch/kernel/entry.S
+++ b/arch/loongarch/kernel/entry.S
@@ -77,24 +77,22 @@ SYM_CODE_START(handle_syscall)
SYM_CODE_END(handle_syscall)
_ASM_NOKPROBE(handle_syscall)
-SYM_CODE_START(ret_from_fork)
+SYM_CODE_START(ret_from_fork_asm)
UNWIND_HINT_REGS
- bl schedule_tail # a0 = struct task_struct *prev
- move a0, sp
- bl syscall_exit_to_user_mode
+ move a1, sp
+ bl ret_from_fork
RESTORE_STATIC
RESTORE_SOME
RESTORE_SP_AND_RET
-SYM_CODE_END(ret_from_fork)
+SYM_CODE_END(ret_from_fork_asm)
-SYM_CODE_START(ret_from_kernel_thread)
+SYM_CODE_START(ret_from_kernel_thread_asm)
UNWIND_HINT_REGS
- bl schedule_tail # a0 = struct task_struct *prev
- move a0, s1
- jirl ra, s0, 0
- move a0, sp
- bl syscall_exit_to_user_mode
+ move a1, sp
+ move a2, s0
+ move a3, s1
+ bl ret_from_kernel_thread
RESTORE_STATIC
RESTORE_SOME
RESTORE_SP_AND_RET
-SYM_CODE_END(ret_from_kernel_thread)
+SYM_CODE_END(ret_from_kernel_thread_asm)
diff --git a/arch/loongarch/kernel/perf_event.c b/arch/loongarch/kernel/perf_event.c
index f86a4b838dd7..8ad098703488 100644
--- a/arch/loongarch/kernel/perf_event.c
+++ b/arch/loongarch/kernel/perf_event.c
@@ -479,8 +479,7 @@ static void handle_associated_event(struct cpu_hw_events *cpuc, int idx,
if (!loongarch_pmu_event_set_period(event, hwc, idx))
return;
- if (perf_event_overflow(event, data, regs))
- loongarch_pmu_disable_event(idx);
+ perf_event_overflow(event, data, regs);
}
static irqreturn_t pmu_handle_irq(int irq, void *dev)
diff --git a/arch/loongarch/kernel/process.c b/arch/loongarch/kernel/process.c
index 6e58f65455c7..3582f591bab2 100644
--- a/arch/loongarch/kernel/process.c
+++ b/arch/loongarch/kernel/process.c
@@ -13,6 +13,7 @@
#include <linux/cpu.h>
#include <linux/init.h>
#include <linux/kernel.h>
+#include <linux/entry-common.h>
#include <linux/errno.h>
#include <linux/sched.h>
#include <linux/sched/debug.h>
@@ -34,6 +35,7 @@
#include <linux/nmi.h>
#include <asm/asm.h>
+#include <asm/asm-prototypes.h>
#include <asm/bootinfo.h>
#include <asm/cpu.h>
#include <asm/elf.h>
@@ -47,6 +49,7 @@
#include <asm/pgtable.h>
#include <asm/processor.h>
#include <asm/reg.h>
+#include <asm/switch_to.h>
#include <asm/unwind.h>
#include <asm/vdso.h>
@@ -63,8 +66,9 @@ EXPORT_SYMBOL(__stack_chk_guard);
unsigned long boot_option_idle_override = IDLE_NO_OVERRIDE;
EXPORT_SYMBOL(boot_option_idle_override);
-asmlinkage void ret_from_fork(void);
-asmlinkage void ret_from_kernel_thread(void);
+asmlinkage void restore_and_ret(void);
+asmlinkage void ret_from_fork_asm(void);
+asmlinkage void ret_from_kernel_thread_asm(void);
void start_thread(struct pt_regs *regs, unsigned long pc, unsigned long sp)
{
@@ -138,6 +142,23 @@ int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src)
return 0;
}
+asmlinkage void noinstr __no_stack_protector ret_from_fork(struct task_struct *prev,
+ struct pt_regs *regs)
+{
+ schedule_tail(prev);
+ syscall_exit_to_user_mode(regs);
+}
+
+asmlinkage void noinstr __no_stack_protector ret_from_kernel_thread(struct task_struct *prev,
+ struct pt_regs *regs,
+ int (*fn)(void *),
+ void *fn_arg)
+{
+ schedule_tail(prev);
+ fn(fn_arg);
+ syscall_exit_to_user_mode(regs);
+}
+
/*
* Copy architecture-specific thread state
*/
@@ -165,8 +186,8 @@ int copy_thread(struct task_struct *p, const struct kernel_clone_args *args)
p->thread.reg03 = childksp;
p->thread.reg23 = (unsigned long)args->fn;
p->thread.reg24 = (unsigned long)args->fn_arg;
- p->thread.reg01 = (unsigned long)ret_from_kernel_thread;
- p->thread.sched_ra = (unsigned long)ret_from_kernel_thread;
+ p->thread.reg01 = (unsigned long)ret_from_kernel_thread_asm;
+ p->thread.sched_ra = (unsigned long)ret_from_kernel_thread_asm;
memset(childregs, 0, sizeof(struct pt_regs));
childregs->csr_euen = p->thread.csr_euen;
childregs->csr_crmd = p->thread.csr_crmd;
@@ -182,8 +203,8 @@ int copy_thread(struct task_struct *p, const struct kernel_clone_args *args)
childregs->regs[3] = usp;
p->thread.reg03 = (unsigned long) childregs;
- p->thread.reg01 = (unsigned long) ret_from_fork;
- p->thread.sched_ra = (unsigned long) ret_from_fork;
+ p->thread.reg01 = (unsigned long) ret_from_fork_asm;
+ p->thread.sched_ra = (unsigned long) ret_from_fork_asm;
/*
* New tasks lose permission to use the fpu. This accelerates context
diff --git a/arch/loongarch/kvm/exit.c b/arch/loongarch/kvm/exit.c
index ea321403644a..fa52251b3bf1 100644
--- a/arch/loongarch/kvm/exit.c
+++ b/arch/loongarch/kvm/exit.c
@@ -341,7 +341,7 @@ static int kvm_trap_handle_gspr(struct kvm_vcpu *vcpu)
* 2) Execute CACOP/IDLE instructions;
* 3) Access to unimplemented CSRs/IOCSRs.
*/
-static int kvm_handle_gspr(struct kvm_vcpu *vcpu)
+static int kvm_handle_gspr(struct kvm_vcpu *vcpu, int ecode)
{
int ret = RESUME_GUEST;
enum emulation_result er = EMULATE_DONE;
@@ -661,7 +661,7 @@ int kvm_emu_mmio_write(struct kvm_vcpu *vcpu, larch_inst inst)
return ret;
}
-static int kvm_handle_rdwr_fault(struct kvm_vcpu *vcpu, bool write)
+static int kvm_handle_rdwr_fault(struct kvm_vcpu *vcpu, bool write, int ecode)
{
int ret;
larch_inst inst;
@@ -675,7 +675,7 @@ static int kvm_handle_rdwr_fault(struct kvm_vcpu *vcpu, bool write)
return RESUME_GUEST;
}
- ret = kvm_handle_mm_fault(vcpu, badv, write);
+ ret = kvm_handle_mm_fault(vcpu, badv, write, ecode);
if (ret) {
/* Treat as MMIO */
inst.word = vcpu->arch.badi;
@@ -705,14 +705,14 @@ static int kvm_handle_rdwr_fault(struct kvm_vcpu *vcpu, bool write)
return ret;
}
-static int kvm_handle_read_fault(struct kvm_vcpu *vcpu)
+static int kvm_handle_read_fault(struct kvm_vcpu *vcpu, int ecode)
{
- return kvm_handle_rdwr_fault(vcpu, false);
+ return kvm_handle_rdwr_fault(vcpu, false, ecode);
}
-static int kvm_handle_write_fault(struct kvm_vcpu *vcpu)
+static int kvm_handle_write_fault(struct kvm_vcpu *vcpu, int ecode)
{
- return kvm_handle_rdwr_fault(vcpu, true);
+ return kvm_handle_rdwr_fault(vcpu, true, ecode);
}
int kvm_complete_user_service(struct kvm_vcpu *vcpu, struct kvm_run *run)
@@ -726,11 +726,12 @@ int kvm_complete_user_service(struct kvm_vcpu *vcpu, struct kvm_run *run)
/**
* kvm_handle_fpu_disabled() - Guest used fpu however it is disabled at host
* @vcpu: Virtual CPU context.
+ * @ecode: Exception code.
*
* Handle when the guest attempts to use fpu which hasn't been allowed
* by the root context.
*/
-static int kvm_handle_fpu_disabled(struct kvm_vcpu *vcpu)
+static int kvm_handle_fpu_disabled(struct kvm_vcpu *vcpu, int ecode)
{
struct kvm_run *run = vcpu->run;
@@ -783,11 +784,12 @@ static long kvm_save_notify(struct kvm_vcpu *vcpu)
/*
* kvm_handle_lsx_disabled() - Guest used LSX while disabled in root.
* @vcpu: Virtual CPU context.
+ * @ecode: Exception code.
*
* Handle when the guest attempts to use LSX when it is disabled in the root
* context.
*/
-static int kvm_handle_lsx_disabled(struct kvm_vcpu *vcpu)
+static int kvm_handle_lsx_disabled(struct kvm_vcpu *vcpu, int ecode)
{
if (kvm_own_lsx(vcpu))
kvm_queue_exception(vcpu, EXCCODE_INE, 0);
@@ -798,11 +800,12 @@ static int kvm_handle_lsx_disabled(struct kvm_vcpu *vcpu)
/*
* kvm_handle_lasx_disabled() - Guest used LASX while disabled in root.
* @vcpu: Virtual CPU context.
+ * @ecode: Exception code.
*
* Handle when the guest attempts to use LASX when it is disabled in the root
* context.
*/
-static int kvm_handle_lasx_disabled(struct kvm_vcpu *vcpu)
+static int kvm_handle_lasx_disabled(struct kvm_vcpu *vcpu, int ecode)
{
if (kvm_own_lasx(vcpu))
kvm_queue_exception(vcpu, EXCCODE_INE, 0);
@@ -810,7 +813,7 @@ static int kvm_handle_lasx_disabled(struct kvm_vcpu *vcpu)
return RESUME_GUEST;
}
-static int kvm_handle_lbt_disabled(struct kvm_vcpu *vcpu)
+static int kvm_handle_lbt_disabled(struct kvm_vcpu *vcpu, int ecode)
{
if (kvm_own_lbt(vcpu))
kvm_queue_exception(vcpu, EXCCODE_INE, 0);
@@ -872,7 +875,7 @@ static void kvm_handle_service(struct kvm_vcpu *vcpu)
kvm_write_reg(vcpu, LOONGARCH_GPR_A0, ret);
}
-static int kvm_handle_hypercall(struct kvm_vcpu *vcpu)
+static int kvm_handle_hypercall(struct kvm_vcpu *vcpu, int ecode)
{
int ret;
larch_inst inst;
@@ -932,16 +935,14 @@ static int kvm_handle_hypercall(struct kvm_vcpu *vcpu)
/*
* LoongArch KVM callback handling for unimplemented guest exiting
*/
-static int kvm_fault_ni(struct kvm_vcpu *vcpu)
+static int kvm_fault_ni(struct kvm_vcpu *vcpu, int ecode)
{
- unsigned int ecode, inst;
- unsigned long estat, badv;
+ unsigned int inst;
+ unsigned long badv;
/* Fetch the instruction */
inst = vcpu->arch.badi;
badv = vcpu->arch.badv;
- estat = vcpu->arch.host_estat;
- ecode = (estat & CSR_ESTAT_EXC) >> CSR_ESTAT_EXC_SHIFT;
kvm_err("ECode: %d PC=%#lx Inst=0x%08x BadVaddr=%#lx ESTAT=%#lx\n",
ecode, vcpu->arch.pc, inst, badv, read_gcsr_estat());
kvm_arch_vcpu_dump_regs(vcpu);
@@ -966,5 +967,5 @@ static exit_handle_fn kvm_fault_tables[EXCCODE_INT_START] = {
int kvm_handle_fault(struct kvm_vcpu *vcpu, int fault)
{
- return kvm_fault_tables[fault](vcpu);
+ return kvm_fault_tables[fault](vcpu, fault);
}
diff --git a/arch/loongarch/kvm/mmu.c b/arch/loongarch/kvm/mmu.c
index 4d203294767c..ed956c5cf2cc 100644
--- a/arch/loongarch/kvm/mmu.c
+++ b/arch/loongarch/kvm/mmu.c
@@ -912,7 +912,7 @@ out:
return err;
}
-int kvm_handle_mm_fault(struct kvm_vcpu *vcpu, unsigned long gpa, bool write)
+int kvm_handle_mm_fault(struct kvm_vcpu *vcpu, unsigned long gpa, bool write, int ecode)
{
int ret;
@@ -921,8 +921,17 @@ int kvm_handle_mm_fault(struct kvm_vcpu *vcpu, unsigned long gpa, bool write)
return ret;
/* Invalidate this entry in the TLB */
- vcpu->arch.flush_gpa = gpa;
- kvm_make_request(KVM_REQ_TLB_FLUSH_GPA, vcpu);
+ if (!cpu_has_ptw || (ecode == EXCCODE_TLBM)) {
+ /*
+ * With HW PTW, invalid TLB is not added when page fault. But
+ * for EXCCODE_TLBM exception, stale TLB may exist because of
+ * the last read access.
+ *
+ * With SW PTW, invalid TLB is added in TLB refill exception.
+ */
+ vcpu->arch.flush_gpa = gpa;
+ kvm_make_request(KVM_REQ_TLB_FLUSH_GPA, vcpu);
+ }
return 0;
}
diff --git a/arch/loongarch/lib/crc32-loongarch.c b/arch/loongarch/lib/crc32-loongarch.c
index c44ee4f32557..b37cd8537b45 100644
--- a/arch/loongarch/lib/crc32-loongarch.c
+++ b/arch/loongarch/lib/crc32-loongarch.c
@@ -26,7 +26,7 @@ do { \
#define CRC32(crc, value, size) _CRC32(crc, value, size, crc)
#define CRC32C(crc, value, size) _CRC32(crc, value, size, crcc)
-static DEFINE_STATIC_KEY_FALSE(have_crc32);
+static __ro_after_init DEFINE_STATIC_KEY_FALSE(have_crc32);
u32 crc32_le_arch(u32 crc, const u8 *p, size_t len)
{
@@ -114,7 +114,7 @@ static int __init crc32_loongarch_init(void)
static_branch_enable(&have_crc32);
return 0;
}
-arch_initcall(crc32_loongarch_init);
+subsys_initcall(crc32_loongarch_init);
static void __exit crc32_loongarch_exit(void)
{
generated by cgit (git 2.34.1) at 2025-05-30 17:36:41 +0000