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2022-04-20tools/nolibc/sys: make open() take a vararg on the 3rd argumentWilly Tarreau
Let's pass a vararg to open() so that it remains compatible with existing code. The arg is only dereferenced when flags contain O_CREAT. The function is generally not inlined anymore, causing an extra call (total 16 extra bytes) but it's still optimized for constant propagation, limiting the excess to no more than 16 bytes in practice when open() is called without O_CREAT, and ~40 with O_CREAT, which remains reasonable. Signed-off-by: Willy Tarreau <w@1wt.eu> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
2022-04-20tools/nolibc/stdio: add perror() to report the errno valueWilly Tarreau
It doesn't contain the text for the error codes, but instead displays "errno=" followed by the errno value. Just like the regular errno, if a non-empty message is passed, it's placed followed with ": " on the output before the errno code. The message is emitted on stderr. Signed-off-by: Willy Tarreau <w@1wt.eu> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
2022-04-20tools/nolibc/types: define EXIT_SUCCESS and EXIT_FAILUREWilly Tarreau
These ones are found in some examples found in man pages and ease portability tests. Signed-off-by: Willy Tarreau <w@1wt.eu> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
2022-04-20tools/nolibc/stdio: add a minimal [vf]printf() implementationWilly Tarreau
This adds a minimal vfprintf() implementation as well as the commonly used fprintf() and printf() that rely on it. For now the function supports: - formats: %s, %c, %u, %d, %x - modifiers: %l and %ll - unknown chars are considered as modifiers and are ignored It is designed to remain minimalist, despite this printf() is 549 bytes on x86_64. It would be wise not to add too many formats. Signed-off-by: Willy Tarreau <w@1wt.eu> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
2022-04-20tools/nolibc/stdio: add fwrite() to stdioWilly Tarreau
We'll use it to write substrings. It relies on a simpler _fwrite() that only takes one size. fputs() was also modified to rely on it. Signed-off-by: Willy Tarreau <w@1wt.eu> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
2022-04-20tools/nolibc/stdio: add stdin/stdout/stderr and fget*/fput* functionsWilly Tarreau
The standard puts() function always emits the trailing LF which makes it unconvenient for small string concatenation. fputs() ought to be used instead but it requires a FILE*. This adds 3 dummy FILE* values (stdin, stdout, stderr) which are in fact pointers to struct FILE of one byte. We reserve 3 pointer values for them, -3, -2 and -1, so that they are ordered, easing the tests and mapping to integer. >From this, fgetc(), fputc(), fgets() and fputs() were implemented, and the previous putchar() and getchar() now remap to these. The standard getc() and putc() macros were also implemented as pointing to these ones. There is absolutely no buffering, fgetc() and fgets() read one byte at a time, fputc() writes one byte at a time, and only fputs() which knows the string's length writes all of it at once. Signed-off-by: Willy Tarreau <w@1wt.eu> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
2022-04-20tools/nolibc/stdio: add a minimal set of stdio functionsWilly Tarreau
This only provides getchar(), putchar(), and puts(). Signed-off-by: Willy Tarreau <w@1wt.eu> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
2022-04-20tools/nolibc/stdlib: add utoh() and u64toh()Willy Tarreau
This adds a pair of functions to emit hex values. Signed-off-by: Willy Tarreau <w@1wt.eu> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
2022-04-20tools/nolibc/stdlib: add i64toa() and u64toa()Willy Tarreau
These are 64-bit variants of the itoa() and utoa() functions. They also support reentrant ones, and use the same itoa_buffer. The functions are a bit larger than the previous ones in 32-bit mode (86 and 98 bytes on x86_64 and armv7 respectively), which is why we continue to provide them as separate functions. Signed-off-by: Willy Tarreau <w@1wt.eu> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
2022-04-20tools/nolibc/stdlib: replace the ltoa() function with more efficient onesWilly Tarreau
The original ltoa() function and the reentrant one ltoa_r() present a number of drawbacks. The divide by 10 generates calls to external code from libgcc_s, and the number does not necessarily start at the beginning of the buffer. Let's rewrite these functions so that they do not involve a divide and only use loops on powers of 10, and implement both signed and unsigned variants, always starting from the buffer's first character. Instead of using a static buffer for each function, we're now using a common one. In order to avoid confusion with the ltoa() name, the new functions are called itoa_r() and utoa_r() to distinguish the signed and unsigned versions, and for convenience for their callers, these functions now reutrn the number of characters emitted. The ltoa_r() function is just an inline mapping to the signed one and which returns the buffer. The functions are quite small (86 bytes on x86_64, 68 on armv7) and do not depend anymore on external code. Signed-off-by: Willy Tarreau <w@1wt.eu> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
2022-04-20tools/nolibc/stdlib: move ltoa() to stdlib.hWilly Tarreau
This function is not standard and performs the opposite of atol(). Let's move it with atol(). It's been split between a reentrant function and one using a static buffer. There's no more definition in nolibc.h anymore now. Signed-off-by: Willy Tarreau <w@1wt.eu> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
2022-04-20tools/nolibc/types: move makedev to types.h and make it a macroWilly Tarreau
The makedev() man page says it's supposed to be a macro and that some OSes have it with the other ones in sys/types.h so it now makes sense to move it to types.h as a macro. Let's also define major() and minor() that perform the reverse operation. Signed-off-by: Willy Tarreau <w@1wt.eu> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
2022-04-20tools/nolibc/types: make FD_SETSIZE configurableWilly Tarreau
The macro was hard-coded to 256 but it's common to see it redefined. Let's support this and make sure we always allocate enough entries for the cases where it wouldn't be multiple of 32. Signed-off-by: Willy Tarreau <w@1wt.eu> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
2022-04-20tools/nolibc/types: move the FD_* functions to macros in types.hWilly Tarreau
FD_SET, FD_CLR, FD_ISSET, FD_ZERO are often expected to be macros and not functions. In addition we already have a file dedicated to such macros and types used by syscalls, it's types.h, so let's move them there and turn them to macros. FD_CLR() and FD_ISSET() were missing, so they were added. FD_ZERO() now deals with its own loop so that it doesn't rely on memset() that sets one byte at a time. Cc: David Laight <David.Laight@aculab.com> Signed-off-by: Willy Tarreau <w@1wt.eu> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
2022-04-20tools/nolibc/ctype: add the missing is* functionsWilly Tarreau
There was only isdigit, this commit adds the other ones. Signed-off-by: Willy Tarreau <w@1wt.eu> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
2022-04-20tools/nolibc/ctype: split the is* functions to ctype.hWilly Tarreau
In fact there's only isdigit() for now. More should definitely be added. Signed-off-by: Willy Tarreau <w@1wt.eu> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
2022-04-20tools/nolibc/string: split the string functions into string.hWilly Tarreau
The string manipulation functions (mem*, str*) are now found in string.h. The file depends on almost nothing and will be usable from other includes if needed. Maybe more functions could be added. Signed-off-by: Willy Tarreau <w@1wt.eu> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
2022-04-20tools/nolibc/stdlib: extract the stdlib-specific functions to their own fileWilly Tarreau
The new file stdlib.h contains the definitions of functions that are usually found in stdlib.h. Many more could certainly be added. Signed-off-by: Willy Tarreau <w@1wt.eu> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
2022-04-20tools/nolibc/sys: split the syscall definitions into their own fileWilly Tarreau
The syscall definitions were moved to sys.h. They were arranged in a more easily maintainable order, whereby the sys_xxx() and xxx() functions were grouped together, which also enlights the occasional mappings such as wait relying on wait4(). Signed-off-by: Willy Tarreau <w@1wt.eu> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
2022-04-20tools/nolibc/arch: split arch-specific code into individual filesWilly Tarreau
In order to ease maintenance, this splits the arch-specific code into one file per architecture. A common file "arch.h" is used to include the right file among arch-* based on the detected architecture. Projects which are already split per architecture could simply rename these files to $arch/arch.h and get rid of the common arch.h. For this reason, include guards were placed into each arch-specific file. Signed-off-by: Willy Tarreau <w@1wt.eu> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
2022-04-20tools/nolibc/types: split syscall-specific definitions into their own filesWilly Tarreau
The macros and type definitions used by a number of syscalls were moved to types.h where they will be easier to maintain. A few of them are arch-specific and must not be moved there (e.g. O_*, sys_stat_struct). A warning about them was placed at the top of the file. Signed-off-by: Willy Tarreau <w@1wt.eu> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
2022-04-20tools/nolibc/std: move the standard type definitions to std.hWilly Tarreau
The ordering of includes and definitions for now is a bit of a mess, as for example asm/signal.h is included after int definitions, but plenty of structures are defined later as they rely on other includes. Let's move the standard type definitions to a dedicated file that is included first. We also move NULL there. This way all other includes are aware of it, and we can bring asm/signal.h back to the top of the file. Signed-off-by: Willy Tarreau <w@1wt.eu> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
2022-04-15Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netPaolo Abeni
2022-04-11tools/nolibc: guard the main file against multiple inclusionWilly Tarreau
Including nolibc.h multiple times results in build errors due to multiple definitions. Let's add a guard against multiple inclusions. Signed-off-by: Willy Tarreau <w@1wt.eu> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
2022-04-11tools/nolibc: use pselect6 on RISCVWilly Tarreau
This arch doesn't provide the old-style select() syscall, we have to use pselect6(). Signed-off-by: Willy Tarreau <w@1wt.eu> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
2022-04-10libbpf: Add ARC support to bpf_tracing.hVladimir Isaev
Add PT_REGS macros suitable for ARCompact and ARCv2. Signed-off-by: Vladimir Isaev <isaev@synopsys.com> Signed-off-by: Sergey Matyukevich <geomatsi@gmail.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Acked-by: Song Liu <songliubraving@fb.com> Link: https://lore.kernel.org/bpf/20220408224442.599566-1-geomatsi@gmail.com
2022-04-09tools include UAPI: Sync linux/vhost.h with the kernel sourcesArnaldo Carvalho de Melo
To get the changes in: b04d910af330b55e ("vdpa: support exposing the count of vqs to userspace") a61280ddddaa45f9 ("vdpa: support exposing the config size to userspace") Silencing this perf build warning: Warning: Kernel ABI header at 'tools/include/uapi/linux/vhost.h' differs from latest version at 'include/uapi/linux/vhost.h' diff -u tools/include/uapi/linux/vhost.h include/uapi/linux/vhost.h $ diff -u tools/include/uapi/linux/vhost.h include/uapi/linux/vhost.h --- tools/include/uapi/linux/vhost.h 2021-07-15 16:17:01.840818309 -0300 +++ include/uapi/linux/vhost.h 2022-04-02 18:55:05.702522387 -0300 @@ -150,4 +150,11 @@ /* Get the valid iova range */ #define VHOST_VDPA_GET_IOVA_RANGE _IOR(VHOST_VIRTIO, 0x78, \ struct vhost_vdpa_iova_range) + +/* Get the config size */ +#define VHOST_VDPA_GET_CONFIG_SIZE _IOR(VHOST_VIRTIO, 0x79, __u32) + +/* Get the count of all virtqueues */ +#define VHOST_VDPA_GET_VQS_COUNT _IOR(VHOST_VIRTIO, 0x80, __u32) + #endif $ tools/perf/trace/beauty/vhost_virtio_ioctl.sh > before $ cp include/uapi/linux/vhost.h tools/include/uapi/linux/vhost.h $ tools/perf/trace/beauty/vhost_virtio_ioctl.sh > after $ diff -u before after --- before 2022-04-04 14:52:25.036375145 -0300 +++ after 2022-04-04 14:52:31.906549976 -0300 @@ -38,4 +38,6 @@ [0x73] = "VDPA_GET_CONFIG", [0x76] = "VDPA_GET_VRING_NUM", [0x78] = "VDPA_GET_IOVA_RANGE", + [0x79] = "VDPA_GET_CONFIG_SIZE", + [0x80] = "VDPA_GET_VQS_COUNT", }; $ Cc: Longpeng <longpeng2@huawei.com> Cc: Michael S. Tsirkin <mst@redhat.com> Link: https://lore.kernel.org/lkml/YksxoFcOARk%2Fldev@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2022-04-08Merge https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-nextJakub Kicinski
Daniel Borkmann says: ==================== pull-request: bpf-next 2022-04-09 We've added 63 non-merge commits during the last 9 day(s) which contain a total of 68 files changed, 4852 insertions(+), 619 deletions(-). The main changes are: 1) Add libbpf support for USDT (User Statically-Defined Tracing) probes. USDTs are an abstraction built on top of uprobes, critical for tracing and BPF, and widely used in production applications, from Andrii Nakryiko. 2) While Andrii was adding support for x86{-64}-specific logic of parsing USDT argument specification, Ilya followed-up with USDT support for s390 architecture, from Ilya Leoshkevich. 3) Support name-based attaching for uprobe BPF programs in libbpf. The format supported is `u[ret]probe/binary_path:[raw_offset|function[+offset]]`, e.g. attaching to libc malloc can be done in BPF via SEC("uprobe/libc.so.6:malloc") now, from Alan Maguire. 4) Various load/store optimizations for the arm64 JIT to shrink the image size by using arm64 str/ldr immediate instructions. Also enable pointer authentication to verify return address for JITed code, from Xu Kuohai. 5) BPF verifier fixes for write access checks to helper functions, e.g. rd-only memory from bpf_*_cpu_ptr() must not be passed to helpers that write into passed buffers, from Kumar Kartikeya Dwivedi. 6) Fix overly excessive stack map allocation for its base map structure and buckets which slipped-in from cleanups during the rlimit accounting removal back then, from Yuntao Wang. 7) Extend the unstable CT lookup helpers for XDP and tc/BPF to report netfilter connection tracking tuple direction, from Lorenzo Bianconi. 8) Improve bpftool dump to show BPF program/link type names, Milan Landaverde. 9) Minor cleanups all over the place from various others. * https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next: (63 commits) bpf: Fix excessive memory allocation in stack_map_alloc() selftests/bpf: Fix return value checks in perf_event_stackmap test selftests/bpf: Add CO-RE relos into linked_funcs selftests libbpf: Use weak hidden modifier for USDT BPF-side API functions libbpf: Don't error out on CO-RE relos for overriden weak subprogs samples, bpf: Move routes monitor in xdp_router_ipv4 in a dedicated thread libbpf: Allow WEAK and GLOBAL bindings during BTF fixup libbpf: Use strlcpy() in path resolution fallback logic libbpf: Add s390-specific USDT arg spec parsing logic libbpf: Make BPF-side of USDT support work on big-endian machines libbpf: Minor style improvements in USDT code libbpf: Fix use #ifdef instead of #if to avoid compiler warning libbpf: Potential NULL dereference in usdt_manager_attach_usdt() selftests/bpf: Uprobe tests should verify param/return values libbpf: Improve string parsing for uprobe auto-attach libbpf: Improve library identification for uprobe binary path resolution selftests/bpf: Test for writes to map key from BPF helpers selftests/bpf: Test passing rdonly mem to global func bpf: Reject writes for PTR_TO_MAP_KEY in check_helper_mem_access bpf: Check PTR_TO_MEM | MEM_RDONLY in check_helper_mem_access ... ==================== Link: https://lore.kernel.org/r/20220408231741.19116-1-daniel@iogearbox.net Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2022-04-03bpf: Correct the comment for BTF kind bitfieldHaiyue Wang
The commit 8fd886911a6a ("bpf: Add BTF_KIND_FLOAT to uapi") has extended the BTF kind bitfield from 4 to 5 bits, correct the comment. Signed-off-by: Haiyue Wang <haiyue.wang@intel.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20220403115327.205964-1-haiyue.wang@intel.com
2022-04-01tools headers UAPI: Sync drm/i915_drm.h with the kernel sourcesArnaldo Carvalho de Melo
To pick up the changes in: caa574ffc4aaf4f2 ("drm/i915/uapi: document behaviour for DG2 64K support") That don't add any new ioctl, so no changes in tooling. This silences this perf build warning: Warning: Kernel ABI header at 'tools/include/uapi/drm/i915_drm.h' differs from latest version at 'include/uapi/drm/i915_drm.h' diff -u tools/include/uapi/drm/i915_drm.h include/uapi/drm/i915_drm.h Cc: Lucas De Marchi <lucas.demarchi@intel.com> Cc: Matthew Auld <matthew.auld@intel.com> Link: http://lore.kernel.org/lkml/YkSChHqaOApscFQ0@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2022-04-01tools headers UAPI: Sync linux/kvm.h with the kernel sourcesArnaldo Carvalho de Melo
To pick the changes in: 6d8491910fcd3324 ("KVM: x86: Introduce KVM_CAP_DISABLE_QUIRKS2") ef11c9463ae00630 ("KVM: s390: Add vm IOCTL for key checked guest absolute memory access") e9e9feebcbc14b17 ("KVM: s390: Add optional storage key checking to MEMOP IOCTL") That just rebuilds perf, as these patches don't add any new KVM ioctl to be harvested for the the 'perf trace' ioctl syscall argument beautifiers. This is also by now used by tools/testing/selftests/kvm/, a simple test build succeeded. This silences this perf build warning: Warning: Kernel ABI header at 'tools/include/uapi/linux/kvm.h' differs from latest version at 'include/uapi/linux/kvm.h' diff -u tools/include/uapi/linux/kvm.h include/uapi/linux/kvm.h Cc: Christian Borntraeger <borntraeger@linux.ibm.com> Cc: Janis Schoetterl-Glausch <scgl@linux.ibm.com> Cc: Oliver Upton <oupton@google.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Link: http://lore.kernel.org/lkml/YkSCOWHQdir1lhdJ@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2022-04-01tools headers UAPI: Sync asm-generic/mman-common.h with the kernelArnaldo Carvalho de Melo
To pick the changes from: 9457056ac426e5ed ("mm: madvise: MADV_DONTNEED_LOCKED") That result in these changes in the tools: $ diff -u tools/include/uapi/asm-generic/mman-common.h include/uapi/asm-generic/mman-common.h --- tools/include/uapi/asm-generic/mman-common.h 2022-03-29 16:17:50.461694991 -0300 +++ include/uapi/asm-generic/mman-common.h 2022-03-27 19:12:48.923250468 -0300 @@ -75,6 +75,8 @@ #define MADV_POPULATE_READ 22 /* populate (prefault) page tables readable */ #define MADV_POPULATE_WRITE 23 /* populate (prefault) page tables writable */ +#define MADV_DONTNEED_LOCKED 24 /* like DONTNEED, but drop locked pages too */ + /* compatibility flags */ #define MAP_FILE 0 $ tools/perf/trace/beauty/madvise_behavior.sh > before $ cp include/uapi/asm-generic/mman-common.h tools/include/uapi/asm-generic/mman-common.h $ tools/perf/trace/beauty/madvise_behavior.sh > after $ diff -u before after --- before 2022-03-29 16:18:04.091044244 -0300 +++ after 2022-03-29 16:18:11.692238906 -0300 @@ -20,6 +20,7 @@ [21] = "PAGEOUT", [22] = "POPULATE_READ", [23] = "POPULATE_WRITE", + [24] = "DONTNEED_LOCKED", [100] = "HWPOISON", [101] = "SOFT_OFFLINE", }; $ I.e. now when madvise gets those behaviours as args, 'perf trace' will be able to translate from the number to a human readable string and to use the strings in tracepoint filter expressions. This addresses the following perf build warning: Warning: Kernel ABI header at 'tools/include/uapi/asm-generic/mman-common.h' differs from latest version at 'include/uapi/asm-generic/mman-common.h' diff -u tools/include/uapi/asm-generic/mman-common.h include/uapi/asm-generic/mman-common.h Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Ian Rogers <irogers@google.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Namhyung Kim <namhyung@kernel.org> Link: http://lore.kernel.org/lkml/YkNcUfeh795yqGMV@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2022-03-28bpf: Sync comments for bpf_get_stackGeliang Tang
Commit ee2a098851bf missed updating the comments for helper bpf_get_stack in tools/include/uapi/linux/bpf.h. Sync it. Fixes: ee2a098851bf ("bpf: Adjust BPF stack helper functions to accommodate skip > 0") Signed-off-by: Geliang Tang <geliang.tang@suse.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Martin KaFai Lau <kafai@fb.com> Link: https://lore.kernel.org/bpf/ce54617746b7ed5e9ba3b844e55e74cb8a60e0b5.1648110794.git.geliang.tang@suse.com
2022-03-27Merge tag 'perf-tools-for-v5.18-2022-03-26' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux Pull perf tools updates from Arnaldo Carvalho de Melo: "New features: perf ftrace: - Add -n/--use-nsec option to the 'latency' subcommand. Default: usecs: $ sudo perf ftrace latency -T dput -a sleep 1 # DURATION | COUNT | GRAPH | 0 - 1 us | 2098375 | ############################# | 1 - 2 us | 61 | | 2 - 4 us | 33 | | 4 - 8 us | 13 | | 8 - 16 us | 124 | | 16 - 32 us | 123 | | 32 - 64 us | 1 | | 64 - 128 us | 0 | | 128 - 256 us | 1 | | 256 - 512 us | 0 | | Better granularity with nsec: $ sudo perf ftrace latency -T dput -a -n sleep 1 # DURATION | COUNT | GRAPH | 0 - 1 us | 0 | | 1 - 2 ns | 0 | | 2 - 4 ns | 0 | | 4 - 8 ns | 0 | | 8 - 16 ns | 0 | | 16 - 32 ns | 0 | | 32 - 64 ns | 0 | | 64 - 128 ns | 1163434 | ############## | 128 - 256 ns | 914102 | ############# | 256 - 512 ns | 884 | | 512 - 1024 ns | 613 | | 1 - 2 us | 31 | | 2 - 4 us | 17 | | 4 - 8 us | 7 | | 8 - 16 us | 123 | | 16 - 32 us | 83 | | perf lock: - Add -c/--combine-locks option to merge lock instances in the same class into a single entry. # perf lock report -c Name acquired contended avg wait(ns) total wait(ns) max wait(ns) min wait(ns) rcu_read_lock 251225 0 0 0 0 0 hrtimer_bases.lock 39450 0 0 0 0 0 &sb->s_type->i_l... 10301 1 662 662 662 662 ptlock_ptr(page) 10173 2 701 1402 760 642 &(ei->i_block_re... 8732 0 0 0 0 0 &xa->xa_lock 8088 0 0 0 0 0 &base->lock 6705 0 0 0 0 0 &p->pi_lock 5549 0 0 0 0 0 &dentry->d_lockr... 5010 4 1274 5097 1844 789 &ep->lock 3958 0 0 0 0 0 - Add -F/--field option to customize the list of fields to output: $ perf lock report -F contended,wait_max -k avg_wait Name contended max wait(ns) avg wait(ns) slock-AF_INET6 1 23543 23543 &lruvec->lru_lock 5 18317 11254 slock-AF_INET6 1 10379 10379 rcu_node_1 1 2104 2104 &dentry->d_lockr... 1 1844 1844 &dentry->d_lockr... 1 1672 1672 &newf->file_lock 15 2279 1025 &dentry->d_lockr... 1 792 792 - Add --synth=no option for record, as there is no need to symbolize, lock names comes from the tracepoints. perf record: - Threaded recording, opt-in, via the new --threads command line option. - Improve AMD IBS (Instruction-Based Sampling) error handling messages. perf script: - Add 'brstackinsnlen' field (use it with -F) for branch stacks. - Output branch sample type in 'perf script'. perf report: - Add "addr_from" and "addr_to" sort dimensions. - Print branch stack entry type in 'perf report --dump-raw-trace' - Fix symbolization for chrooted workloads. Hardware tracing: Intel PT: - Add CFE (Control Flow Event) and EVD (Event Data) packets support. - Add MODE.Exec IFLAG bit support. Explanation about these features from the "Intel® 64 and IA-32 architectures software developer’s manual combined volumes: 1, 2A, 2B, 2C, 2D, 3A, 3B, 3C, 3D, and 4" PDF at: https://cdrdv2.intel.com/v1/dl/getContent/671200 At page 3951: "32.2.4 Event Trace is a capability that exposes details about the asynchronous events, when they are generated, and when their corresponding software event handler completes execution. These include: o Interrupts, including NMI and SMI, including the interrupt vector when defined. o Faults, exceptions including the fault vector. - Page faults additionally include the page fault address, when in context. o Event handler returns, including IRET and RSM. o VM exits and VM entries.¹ - VM exits include the values written to the “exit reason” and “exit qualification” VMCS fields. INIT and SIPI events. o TSX aborts, including the abort status returned for the RTM instructions. o Shutdown. Additionally, it provides indication of the status of the Interrupt Flag (IF), to indicate when interrupts are masked" ARM CoreSight: - Use advertised caps/min_interval as default sample_period on ARM spe. - Update deduction of TRCCONFIGR register for branch broadcast on ARM's CoreSight ETM. Vendor Events (JSON): Intel: - Update events and metrics for: Alderlake, Broadwell, Broadwell DE, BroadwellX, CascadelakeX, Elkhartlake, Bonnell, Goldmont, GoldmontPlus, Westmere EP-DP, Haswell, HaswellX, Icelake, IcelakeX, Ivybridge, Ivytown, Jaketown, Knights Landing, Nehalem EP, Sandybridge, Silvermont, Skylake, Skylake Server, SkylakeX, Tigerlake, TremontX, Westmere EP-SP, and Westmere EX. ARM: - Add support for HiSilicon CPA PMU aliasing. perf stat: - Fix forked applications enablement of counters. - The 'slots' should only be printed on a different order than the one specified on the command line when 'topdown' events are present, fix it. Miscellaneous: - Sync msr-index, cpufeatures header files with the kernel sources. - Stop using some deprecated libbpf APIs in 'perf trace'. - Fix some spelling mistakes. - Refactor the maps pointers usage to pave the way for using refcount debugging. - Only offer the --tui option on perf top, report and annotate when perf was built with libslang. - Don't mention --to-ctf in 'perf data --help' when not linking with the required library, libbabeltrace. - Use ARRAY_SIZE() instead of ad hoc equivalent, spotted by array_size.cocci. - Enhance the matching of sub-commands abbreviations: 'perf c2c rec' -> 'perf c2c record' 'perf c2c recport -> error - Set build-id using build-id header on new mmap records. - Fix generation of 'perf --version' string. perf test: - Add test for the arm_spe event. - Add test to check unwinding using fame-pointer (fp) mode on arm64. - Make metric testing more robust in 'perf test'. - Add error message for unsupported branch stack cases. libperf: - Add API for allocating new thread map array. - Fix typo in perf_evlist__open() failure error messages in libperf tests. perf c2c: - Replace bitmap_weight() with bitmap_empty() where appropriate" * tag 'perf-tools-for-v5.18-2022-03-26' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux: (143 commits) perf evsel: Improve AMD IBS (Instruction-Based Sampling) error handling messages perf python: Add perf_env stubs that will be needed in evsel__open_strerror() perf tools: Enhance the matching of sub-commands abbreviations libperf tests: Fix typo in perf_evlist__open() failure error messages tools arm64: Import cputype.h perf lock: Add -F/--field option to control output perf lock: Extend struct lock_key to have print function perf lock: Add --synth=no option for record tools headers cpufeatures: Sync with the kernel sources tools headers cpufeatures: Sync with the kernel sources perf stat: Fix forked applications enablement of counters tools arch x86: Sync the msr-index.h copy with the kernel sources perf evsel: Make evsel__env() always return a valid env perf build-id: Fix spelling mistake "Cant" -> "Can't" perf header: Fix spelling mistake "could't" -> "couldn't" perf script: Add 'brstackinsnlen' for branch stacks perf parse-events: Move slots only with topdown perf ftrace latency: Update documentation perf ftrace latency: Add -n/--use-nsec option perf tools: Fix version kernel tag ...
2022-03-27Merge tag 'memblock-v5.18-rc1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/rppt/memblock Pull memblock updates from Mike Rapoport: "Test suite and a small cleanup: - A small cleanup of unused variable in __next_mem_pfn_range_in_zone - Initial test suite to simulate memblock behaviour in userspace" * tag 'memblock-v5.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rppt/memblock: (27 commits) memblock tests: Add TODO and README files memblock tests: Add memblock_alloc_try_nid tests for bottom up memblock tests: Add memblock_alloc_try_nid tests for top down memblock tests: Add memblock_alloc_from tests for bottom up memblock tests: Add memblock_alloc_from tests for top down memblock tests: Add memblock_alloc tests for bottom up memblock tests: Add memblock_alloc tests for top down memblock tests: Add simulation of physical memory memblock tests: Split up reset_memblock function memblock tests: Fix testing with 32-bit physical addresses memblock: __next_mem_pfn_range_in_zone: remove unneeded local variable nid memblock tests: Add memblock_free tests memblock tests: Add memblock_add_node test memblock tests: Add memblock_remove tests memblock tests: Add memblock_reserve tests memblock tests: Add memblock_add tests memblock tests: Add memblock reset function memblock tests: Add skeleton of the memblock simulator tools/include: Add debugfs.h stub tools/include: Add pfn.h stub ...
2022-03-27Merge tag 'x86_core_for_5.18_rc1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 CET-IBT (Control-Flow-Integrity) support from Peter Zijlstra: "Add support for Intel CET-IBT, available since Tigerlake (11th gen), which is a coarse grained, hardware based, forward edge Control-Flow-Integrity mechanism where any indirect CALL/JMP must target an ENDBR instruction or suffer #CP. Additionally, since Alderlake (12th gen)/Sapphire-Rapids, speculation is limited to 2 instructions (and typically fewer) on branch targets not starting with ENDBR. CET-IBT also limits speculation of the next sequential instruction after the indirect CALL/JMP [1]. CET-IBT is fundamentally incompatible with retpolines, but provides, as described above, speculation limits itself" [1] https://www.intel.com/content/www/us/en/developer/articles/technical/software-security-guidance/technical-documentation/branch-history-injection.html * tag 'x86_core_for_5.18_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (53 commits) kvm/emulate: Fix SETcc emulation for ENDBR x86/Kconfig: Only allow CONFIG_X86_KERNEL_IBT with ld.lld >= 14.0.0 x86/Kconfig: Only enable CONFIG_CC_HAS_IBT for clang >= 14.0.0 kbuild: Fixup the IBT kbuild changes x86/Kconfig: Do not allow CONFIG_X86_X32_ABI=y with llvm-objcopy x86: Remove toolchain check for X32 ABI capability x86/alternative: Use .ibt_endbr_seal to seal indirect calls objtool: Find unused ENDBR instructions objtool: Validate IBT assumptions objtool: Add IBT/ENDBR decoding objtool: Read the NOENDBR annotation x86: Annotate idtentry_df() x86,objtool: Move the ASM_REACHABLE annotation to objtool.h x86: Annotate call_on_stack() objtool: Rework ASM_REACHABLE x86: Mark __invalid_creds() __noreturn exit: Mark do_group_exit() __noreturn x86: Mark stop_this_cpu() __noreturn objtool: Ignore extra-symbol code objtool: Rename --duplicate to --lto ...
2022-03-24Merge branch 'akpm' (patches from Andrew)Linus Torvalds
Merge more updates from Andrew Morton: "Various misc subsystems, before getting into the post-linux-next material. 41 patches. Subsystems affected by this patch series: procfs, misc, core-kernel, lib, checkpatch, init, pipe, minix, fat, cgroups, kexec, kdump, taskstats, panic, kcov, resource, and ubsan" * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (41 commits) Revert "ubsan, kcsan: Don't combine sanitizer with kcov on clang" kernel/resource: fix kfree() of bootmem memory again kcov: properly handle subsequent mmap calls kcov: split ioctl handling into locked and unlocked parts panic: move panic_print before kmsg dumpers panic: add option to dump all CPUs backtraces in panic_print docs: sysctl/kernel: add missing bit to panic_print taskstats: remove unneeded dead assignment kasan: no need to unset panic_on_warn in end_report() ubsan: no need to unset panic_on_warn in ubsan_epilogue() panic: unset panic_on_warn inside panic() docs: kdump: add scp example to write out the dump file docs: kdump: update description about sysfs file system support arm64: mm: use IS_ENABLED(CONFIG_KEXEC_CORE) instead of #ifdef x86/setup: use IS_ENABLED(CONFIG_KEXEC_CORE) instead of #ifdef riscv: mm: init: use IS_ENABLED(CONFIG_KEXEC_CORE) instead of #ifdef kexec: make crashk_res, crashk_low_res and crash_notes symbols always visible cgroup: use irqsave in cgroup_rstat_flush_locked(). fat: use pointer to simple type in put_user() minix: fix bug when opening a file with O_DIRECT ...
2022-03-24Merge tag 'net-next-5.18' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next Pull networking updates from Jakub Kicinski: "The sprinkling of SPI drivers is because we added a new one and Mark sent us a SPI driver interface conversion pull request. Core ---- - Introduce XDP multi-buffer support, allowing the use of XDP with jumbo frame MTUs and combination with Rx coalescing offloads (LRO). - Speed up netns dismantling (5x) and lower the memory cost a little. Remove unnecessary per-netns sockets. Scope some lists to a netns. Cut down RCU syncing. Use batch methods. Allow netdev registration to complete out of order. - Support distinguishing timestamp types (ingress vs egress) and maintaining them across packet scrubbing points (e.g. redirect). - Continue the work of annotating packet drop reasons throughout the stack. - Switch netdev error counters from an atomic to dynamically allocated per-CPU counters. - Rework a few preempt_disable(), local_irq_save() and busy waiting sections problematic on PREEMPT_RT. - Extend the ref_tracker to allow catching use-after-free bugs. BPF --- - Introduce "packing allocator" for BPF JIT images. JITed code is marked read only, and used to be allocated at page granularity. Custom allocator allows for more efficient memory use, lower iTLB pressure and prevents identity mapping huge pages from getting split. - Make use of BTF type annotations (e.g. __user, __percpu) to enforce the correct probe read access method, add appropriate helpers. - Convert the BPF preload to use light skeleton and drop the user-mode-driver dependency. - Allow XDP BPF_PROG_RUN test infra to send real packets, enabling its use as a packet generator. - Allow local storage memory to be allocated with GFP_KERNEL if called from a hook allowed to sleep. - Introduce fprobe (multi kprobe) to speed up mass attachment (arch bits to come later). - Add unstable conntrack lookup helpers for BPF by using the BPF kfunc infra. - Allow cgroup BPF progs to return custom errors to user space. - Add support for AF_UNIX iterator batching. - Allow iterator programs to use sleepable helpers. - Support JIT of add, and, or, xor and xchg atomic ops on arm64. - Add BTFGen support to bpftool which allows to use CO-RE in kernels without BTF info. - Large number of libbpf API improvements, cleanups and deprecations. Protocols --------- - Micro-optimize UDPv6 Tx, gaining up to 5% in test on dummy netdev. - Adjust TSO packet sizes based on min_rtt, allowing very low latency links (data centers) to always send full-sized TSO super-frames. - Make IPv6 flow label changes (AKA hash rethink) more configurable, via sysctl and setsockopt. Distinguish between server and client behavior. - VxLAN support to "collect metadata" devices to terminate only configured VNIs. This is similar to VLAN filtering in the bridge. - Support inserting IPv6 IOAM information to a fraction of frames. - Add protocol attribute to IP addresses to allow identifying where given address comes from (kernel-generated, DHCP etc.) - Support setting socket and IPv6 options via cmsg on ping6 sockets. - Reject mis-use of ECN bits in IP headers as part of DSCP/TOS. Define dscp_t and stop taking ECN bits into account in fib-rules. - Add support for locked bridge ports (for 802.1X). - tun: support NAPI for packets received from batched XDP buffs, doubling the performance in some scenarios. - IPv6 extension header handling in Open vSwitch. - Support IPv6 control message load balancing in bonding, prevent neighbor solicitation and advertisement from using the wrong port. Support NS/NA monitor selection similar to existing ARP monitor. - SMC - improve performance with TCP_CORK and sendfile() - support auto-corking - support TCP_NODELAY - MCTP (Management Component Transport Protocol) - add user space tag control interface - I2C binding driver (as specified by DMTF DSP0237) - Multi-BSSID beacon handling in AP mode for WiFi. - Bluetooth: - handle MSFT Monitor Device Event - add MGMT Adv Monitor Device Found/Lost events - Multi-Path TCP: - add support for the SO_SNDTIMEO socket option - lots of selftest cleanups and improvements - Increase the max PDU size in CAN ISOTP to 64 kB. Driver API ---------- - Add HW counters for SW netdevs, a mechanism for devices which offload packet forwarding to report packet statistics back to software interfaces such as tunnels. - Select the default NIC queue count as a fraction of number of physical CPU cores, instead of hard-coding to 8. - Expose devlink instance locks to drivers. Allow device layer of drivers to use that lock directly instead of creating their own which always runs into ordering issues in devlink callbacks. - Add header/data split indication to guide user space enabling of TCP zero-copy Rx. - Allow configuring completion queue event size. - Refactor page_pool to enable fragmenting after allocation. - Add allocation and page reuse statistics to page_pool. - Improve Multiple Spanning Trees support in the bridge to allow reuse of topologies across VLANs, saving HW resources in switches. - DSA (Distributed Switch Architecture): - replay and offload of host VLAN entries - offload of static and local FDB entries on LAG interfaces - FDB isolation and unicast filtering New hardware / drivers ---------------------- - Ethernet: - LAN937x T1 PHYs - Davicom DM9051 SPI NIC driver - Realtek RTL8367S, RTL8367RB-VB switch and MDIO - Microchip ksz8563 switches - Netronome NFP3800 SmartNICs - Fungible SmartNICs - MediaTek MT8195 switches - WiFi: - mt76: MediaTek mt7916 - mt76: MediaTek mt7921u USB adapters - brcmfmac: Broadcom BCM43454/6 - Mobile: - iosm: Intel M.2 7360 WWAN card Drivers ------- - Convert many drivers to the new phylink API built for split PCS designs but also simplifying other cases. - Intel Ethernet NICs: - add TTY for GNSS module for E810T device - improve AF_XDP performance - GTP-C and GTP-U filter offload - QinQ VLAN support - Mellanox Ethernet NICs (mlx5): - support xdp->data_meta - multi-buffer XDP - offload tc push_eth and pop_eth actions - Netronome Ethernet NICs (nfp): - flow-independent tc action hardware offload (police / meter) - AF_XDP - Other Ethernet NICs: - at803x: fiber and SFP support - xgmac: mdio: preamble suppression and custom MDC frequencies - r8169: enable ASPM L1.2 if system vendor flags it as safe - macb/gem: ZynqMP SGMII - hns3: add TX push mode - dpaa2-eth: software TSO - lan743x: multi-queue, mdio, SGMII, PTP - axienet: NAPI and GRO support - Mellanox Ethernet switches (mlxsw): - source and dest IP address rewrites - RJ45 ports - Marvell Ethernet switches (prestera): - basic routing offload - multi-chain TC ACL offload - NXP embedded Ethernet switches (ocelot & felix): - PTP over UDP with the ocelot-8021q DSA tagging protocol - basic QoS classification on Felix DSA switch using dcbnl - port mirroring for ocelot switches - Microchip high-speed industrial Ethernet (sparx5): - offloading of bridge port flooding flags - PTP Hardware Clock - Other embedded switches: - lan966x: PTP Hardward Clock - qca8k: mdio read/write operations via crafted Ethernet packets - Qualcomm 802.11ax WiFi (ath11k): - add LDPC FEC type and 802.11ax High Efficiency data in radiotap - enable RX PPDU stats in monitor co-exist mode - Intel WiFi (iwlwifi): - UHB TAS enablement via BIOS - band disablement via BIOS - channel switch offload - 32 Rx AMPDU sessions in newer devices - MediaTek WiFi (mt76): - background radar detection - thermal management improvements on mt7915 - SAR support for more mt76 platforms - MBSSID and 6 GHz band on mt7915 - RealTek WiFi: - rtw89: AP mode - rtw89: 160 MHz channels and 6 GHz band - rtw89: hardware scan - Bluetooth: - mt7921s: wake on Bluetooth, SCO over I2S, wide-band-speed (WBS) - Microchip CAN (mcp251xfd): - multiple RX-FIFOs and runtime configurable RX/TX rings - internal PLL, runtime PM handling simplification - improve chip detection and error handling after wakeup" * tag 'net-next-5.18' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (2521 commits) llc: fix netdevice reference leaks in llc_ui_bind() drivers: ethernet: cpsw: fix panic when interrupt coaleceing is set via ethtool ice: don't allow to run ice_send_event_to_aux() in atomic ctx ice: fix 'scheduling while atomic' on aux critical err interrupt net/sched: fix incorrect vlan_push_eth dest field net: bridge: mst: Restrict info size queries to bridge ports net: marvell: prestera: add missing destroy_workqueue() in prestera_module_init() drivers: net: xgene: Fix regression in CRC stripping net: geneve: add missing netlink policy and size for IFLA_GENEVE_INNER_PROTO_INHERIT net: dsa: fix missing host-filtered multicast addresses net/mlx5e: Fix build warning, detected write beyond size of field iwlwifi: mvm: Don't fail if PPAG isn't supported selftests/bpf: Fix kprobe_multi test. Revert "rethook: x86: Add rethook x86 implementation" Revert "arm64: rethook: Add arm64 rethook implementation" Revert "powerpc: Add rethook support" Revert "ARM: rethook: Add rethook arm implementation" netdevice: add missing dm_private kdoc net: bridge: mst: prevent NULL deref in br_mst_info_size() selftests: forwarding: Use same VRF for port and VLAN upper ...
2022-03-24Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds
Pull kvm updates from Paolo Bonzini: "ARM: - Proper emulation of the OSLock feature of the debug architecture - Scalibility improvements for the MMU lock when dirty logging is on - New VMID allocator, which will eventually help with SVA in VMs - Better support for PMUs in heterogenous systems - PSCI 1.1 support, enabling support for SYSTEM_RESET2 - Implement CONFIG_DEBUG_LIST at EL2 - Make CONFIG_ARM64_ERRATUM_2077057 default y - Reduce the overhead of VM exit when no interrupt is pending - Remove traces of 32bit ARM host support from the documentation - Updated vgic selftests - Various cleanups, doc updates and spelling fixes RISC-V: - Prevent KVM_COMPAT from being selected - Optimize __kvm_riscv_switch_to() implementation - RISC-V SBI v0.3 support s390: - memop selftest - fix SCK locking - adapter interruptions virtualization for secure guests - add Claudio Imbrenda as maintainer - first step to do proper storage key checking x86: - Continue switching kvm_x86_ops to static_call(); introduce static_call_cond() and __static_call_ret0 when applicable. - Cleanup unused arguments in several functions - Synthesize AMD 0x80000021 leaf - Fixes and optimization for Hyper-V sparse-bank hypercalls - Implement Hyper-V's enlightened MSR bitmap for nested SVM - Remove MMU auditing - Eager splitting of page tables (new aka "TDP" MMU only) when dirty page tracking is enabled - Cleanup the implementation of the guest PGD cache - Preparation for the implementation of Intel IPI virtualization - Fix some segment descriptor checks in the emulator - Allow AMD AVIC support on systems with physical APIC ID above 255 - Better API to disable virtualization quirks - Fixes and optimizations for the zapping of page tables: - Zap roots in two passes, avoiding RCU read-side critical sections that last too long for very large guests backed by 4 KiB SPTEs. - Zap invalid and defunct roots asynchronously via concurrency-managed work queue. - Allowing yielding when zapping TDP MMU roots in response to the root's last reference being put. - Batch more TLB flushes with an RCU trick. Whoever frees the paging structure now holds RCU as a proxy for all vCPUs running in the guest, i.e. to prolongs the grace period on their behalf. It then kicks the the vCPUs out of guest mode before doing rcu_read_unlock(). Generic: - Introduce __vcalloc and use it for very large allocations that need memcg accounting" * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (246 commits) KVM: use kvcalloc for array allocations KVM: x86: Introduce KVM_CAP_DISABLE_QUIRKS2 kvm: x86: Require const tsc for RT KVM: x86: synthesize CPUID leaf 0x80000021h if useful KVM: x86: add support for CPUID leaf 0x80000021 KVM: x86: do not use KVM_X86_OP_OPTIONAL_RET0 for get_mt_mask Revert "KVM: x86/mmu: Zap only TDP MMU leafs in kvm_zap_gfn_range()" kvm: x86/mmu: Flush TLB before zap_gfn_range releases RCU KVM: arm64: fix typos in comments KVM: arm64: Generalise VM features into a set of flags KVM: s390: selftests: Add error memop tests KVM: s390: selftests: Add more copy memop tests KVM: s390: selftests: Add named stages for memop test KVM: s390: selftests: Add macro as abstraction for MEM_OP KVM: s390: selftests: Split memop tests KVM: s390x: fix SCK locking RISC-V: KVM: Implement SBI HSM suspend call RISC-V: KVM: Add common kvm_riscv_vcpu_wfi() function RISC-V: Add SBI HSM suspend related defines RISC-V: KVM: Implement SBI v0.3 SRST extension ...
2022-03-23linux/types.h: remove unnecessary __bitwise__Bjorn Helgaas
There are no users of "__bitwise__" except the definition of "__bitwise". Remove __bitwise__ and define __bitwise directly. This is a follow-up to 05de97003c77 ("linux/types.h: enable endian checks for all sparse builds"). [akpm@linux-foundation.org: change the tools/include/linux/types.h definition also] Link: https://lkml.kernel.org/r/20220310220927.245704-2-helgaas@kernel.org Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Cc: Michael S. Tsirkin <mst@redhat.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Nathan Chancellor <nathan@kernel.org> Cc: Nick Desaulniers <ndesaulniers@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2022-03-23Merge tag 'asm-generic-5.18' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic Pull asm-generic updates from Arnd Bergmann: "There are three sets of updates for 5.18 in the asm-generic tree: - The set_fs()/get_fs() infrastructure gets removed for good. This was already gone from all major architectures, but now we can finally remove it everywhere, which loses some particularly tricky and error-prone code. There is a small merge conflict against a parisc cleanup, the solution is to use their new version. - The nds32 architecture ends its tenure in the Linux kernel. The hardware is still used and the code is in reasonable shape, but the mainline port is not actively maintained any more, as all remaining users are thought to run vendor kernels that would never be updated to a future release. - A series from Masahiro Yamada cleans up some of the uapi header files to pass the compile-time checks" * tag 'asm-generic-5.18' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic: (27 commits) nds32: Remove the architecture uaccess: remove CONFIG_SET_FS ia64: remove CONFIG_SET_FS support sh: remove CONFIG_SET_FS support sparc64: remove CONFIG_SET_FS support lib/test_lockup: fix kernel pointer check for separate address spaces uaccess: generalize access_ok() uaccess: fix type mismatch warnings from access_ok() arm64: simplify access_ok() m68k: fix access_ok for coldfire MIPS: use simpler access_ok() MIPS: Handle address errors for accesses above CPU max virtual user address uaccess: add generic __{get,put}_kernel_nofault nios2: drop access_ok() check from __put_user() x86: use more conventional access_ok() definition x86: remove __range_not_ok() sparc64: add __{get,put}_kernel_nofault() nds32: fix access_ok() checks in get/put_user uaccess: fix nios2 and microblaze get_user_8() sparc64: fix building assembly files ...
2022-03-22Merge tag 'perf-core-2022-03-21' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 perf event updates from Ingo Molnar: - Fix address filtering for Intel/PT,ARM/CoreSight - Enable Intel/PEBS format 5 - Allow more fixed-function counters for x86 - Intel/PT: Enable not recording Taken-Not-Taken packets - Add a few branch-types * tag 'perf-core-2022-03-21' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: perf/x86/intel/uncore: Fix the build on !CONFIG_PHYS_ADDR_T_64BIT perf: Add irq and exception return branch types perf/x86/intel/uncore: Make uncore_discovery clean for 64 bit addresses perf/x86/intel/pt: Add a capability and config bit for disabling TNTs perf/x86/intel/pt: Add a capability and config bit for event tracing perf/x86/intel: Increase max number of the fixed counters KVM: x86: use the KVM side max supported fixed counter perf/x86/intel: Enable PEBS format 5 perf/core: Allow kernel address filter when not filtering the kernel perf/x86/intel/pt: Fix address filter config for 32-bit kernel perf/core: Fix address filter parser for multiple filters x86: Share definition of __is_canonical_address() perf/x86/intel/pt: Relax address filter validation
2022-03-17bpf: Add cookie support to programs attached with kprobe multi linkJiri Olsa
Adding support to call bpf_get_attach_cookie helper from kprobe programs attached with kprobe multi link. The cookie is provided by array of u64 values, where each value is paired with provided function address or symbol with the same array index. When cookie array is provided it's sorted together with addresses (check bpf_kprobe_multi_cookie_swap). This way we can find cookie based on the address in bpf_get_attach_cookie helper. Suggested-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Jiri Olsa <jolsa@kernel.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20220316122419.933957-7-jolsa@kernel.org
2022-03-17bpf: Add multi kprobe linkJiri Olsa
Adding new link type BPF_LINK_TYPE_KPROBE_MULTI that attaches kprobe program through fprobe API. The fprobe API allows to attach probe on multiple functions at once very fast, because it works on top of ftrace. On the other hand this limits the probe point to the function entry or return. The kprobe program gets the same pt_regs input ctx as when it's attached through the perf API. Adding new attach type BPF_TRACE_KPROBE_MULTI that allows attachment kprobe to multiple function with new link. User provides array of addresses or symbols with count to attach the kprobe program to. The new link_create uapi interface looks like: struct { __u32 flags; __u32 cnt; __aligned_u64 syms; __aligned_u64 addrs; } kprobe_multi; The flags field allows single BPF_TRACE_KPROBE_MULTI bit to create return multi kprobe. Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org> Signed-off-by: Jiri Olsa <jolsa@kernel.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20220316122419.933957-4-jolsa@kernel.org
2022-03-15x86,objtool: Move the ASM_REACHABLE annotation to objtool.hPeter Zijlstra
Because we need a variant for .S files too. Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lkml.kernel.org/r/Yi9gOW9f1GGwwUD6@hirez.programming.kicks-ass.net
2022-03-15x86/ibt: Add ANNOTATE_NOENDBRPeter Zijlstra
In order to have objtool warn about code references to !ENDBR instruction, we need an annotation to allow this for non-control-flow instances -- consider text range checks, text patching, or return trampolines etc. Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Reviewed-by: Kees Cook <keescook@chromium.org> Acked-by: Josh Poimboeuf <jpoimboe@redhat.com> Link: https://lore.kernel.org/r/20220308154317.578968224@infradead.org
2022-03-14Merge remote-tracking branch 'torvalds/master' into perf/coreArnaldo Carvalho de Melo
To pick up fixes that went thru perf/urgent. Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2022-03-12tools compiler.h: Remove duplicate #ifndef noinline blockRasmus Villemoes
The same three lines also appear a bit earlier in the same file. Reviewed-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk> Cc: Ard Biesheuvel <ardb@kernel.org> Link: https://lore.kernel.org/r/20211015083144.2767725-1-linux@rasmusvillemoes.dk Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2022-03-10bpf-lsm: Introduce new helper bpf_ima_file_hash()Roberto Sassu
ima_file_hash() has been modified to calculate the measurement of a file on demand, if it has not been already performed by IMA or the measurement is not fresh. For compatibility reasons, ima_inode_hash() remains unchanged. Keep the same approach in eBPF and introduce the new helper bpf_ima_file_hash() to take advantage of the modified behavior of ima_file_hash(). Signed-off-by: Roberto Sassu <roberto.sassu@huawei.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20220302111404.193900-4-roberto.sassu@huawei.com
2022-03-10bpf: Fix comment for helper bpf_current_task_under_cgroup()Hengqi Chen
Fix the descriptions of the return values of helper bpf_current_task_under_cgroup(). Fixes: c6b5fb8690fa ("bpf: add documentation for eBPF helpers (42-50)") Signed-off-by: Hengqi Chen <hengqi.chen@gmail.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Yonghong Song <yhs@fb.com> Link: https://lore.kernel.org/bpf/20220310155335.1278783-1-hengqi.chen@gmail.com
generated by cgit (git 2.34.1) at 2025-07-19 00:19:01 +0000