linux.git/tools/include/uapi/asm-generic, branch v6.12.80

tools/include: Sync uapi/asm-generic/unistd.h with the kernel sources

2024-08-07T17:58:51+00:00

And arch syscall tables to pick up changes from:

  b1e31c134a8a powerpc: restore some missing spu syscalls
  d3882564a77c syscalls: fix compat_sys_io_pgetevents_time64 usage
  54233a425403 uretprobe: change syscall number, again
  63ded110979b uprobe: Change uretprobe syscall scope and number
  9142be9e6443 x86/syscall: Mark exit[_group] syscall handlers __noreturn
  9aae1baa1c5d x86, arm: Add missing license tag to syscall tables files
  5c28424e9a34 syscalls: Fix to add sys_uretprobe to syscall.tbl
  190fec72df4a uprobe: Wire up uretprobe system call

This should be used to beautify syscall arguments and it addresses
these tools/perf build warnings:

  Warning: Kernel ABI header differences:
  diff -u tools/include/uapi/asm-generic/unistd.h include/uapi/asm-generic/unistd.h
  diff -u tools/perf/arch/x86/entry/syscalls/syscall_64.tbl arch/x86/entry/syscalls/syscall_64.tbl
  diff -u tools/perf/arch/powerpc/entry/syscalls/syscall.tbl arch/powerpc/kernel/syscalls/syscall.tbl
  diff -u tools/perf/arch/s390/entry/syscalls/syscall.tbl arch/s390/kernel/syscalls/syscall.tbl

Please see tools/include/uapi/README for details (it's in the first patch
of this series).

Cc: Arnd Bergmann 
Cc: linux-arch@vger.kernel.org
Signed-off-by: Namhyung Kim

clone3: drop __ARCH_WANT_SYS_CLONE3 macro

2024-07-10T12:23:38+00:00

When clone3() was introduced, it was not obvious how each architecture
deals with setting up the stack and keeping the register contents in
a fork()-like system call, so this was left for the architecture
maintainers to implement, with __ARCH_WANT_SYS_CLONE3 defined by those
that already implement it.

Five years later, we still have a few architectures left that are missing
clone3(), and the macro keeps getting in the way as it's fundamentally
different from all the other __ARCH_WANT_SYS_* macros that are meant
to provide backwards-compatibility with applications using older
syscalls that are no longer provided by default.

Address this by reversing the polarity of the macro, adding an
__ARCH_BROKEN_SYS_CLONE3 macro to all architectures that don't
already provide the syscall, and remove __ARCH_WANT_SYS_CLONE3
from all the other ones.

Acked-by: Geert Uytterhoeven 
Signed-off-by: Arnd Bergmann

tools headers: Update the syscall tables and unistd.h, mostly to support the new 'mseal' syscall

2024-05-28T14:10:00+00:00

But also to wire up shadow stacks on 32-bit x86, picking up those
changes from these csets:

  ff388fe5c481d39c ("mseal: wire up mseal syscall")
  2883f01ec37dd866 ("x86/shstk: Enable shadow stacks for x32")

This makes 'perf trace' support it, now its possible, for instance to
do:

  # perf trace -e mseal --max-stack=16

Here is an example with the 'sendmmsg' syscall:

  root@x1:~# perf trace -e sendmmsg --max-stack 16 --max-events=1
       0.000 ( 0.062 ms): dbus-broker/1012 sendmmsg(fd: 150, mmsg: 0x7ffef57cca50, vlen: 1, flags: DONTWAIT|NOSIGNAL) = 1
                                         syscall_exit_to_user_mode_prepare ([kernel.kallsyms])
                                         syscall_exit_to_user_mode_prepare ([kernel.kallsyms])
                                         syscall_exit_to_user_mode ([kernel.kallsyms])
                                         do_syscall_64 ([kernel.kallsyms])
                                         entry_SYSCALL_64 ([kernel.kallsyms])
                                         [0x117ce7] (/usr/lib64/libc.so.6 (deleted))
  root@x1:~#

To do a system wide tracing of the new 'mseal' syscall with a backtrace
of at most 16 entries.

This addresses these perf tools build warnings:

  Warning: Kernel ABI header differences:
    diff -u tools/include/uapi/asm-generic/unistd.h include/uapi/asm-generic/unistd.h
    diff -u tools/perf/arch/x86/entry/syscalls/syscall_64.tbl arch/x86/entry/syscalls/syscall_64.tbl
    diff -u tools/perf/arch/powerpc/entry/syscalls/syscall.tbl arch/powerpc/kernel/syscalls/syscall.tbl
    diff -u tools/perf/arch/s390/entry/syscalls/syscall.tbl arch/s390/kernel/syscalls/syscall.tbl
    diff -u tools/perf/arch/mips/entry/syscalls/syscall_n64.tbl arch/mips/kernel/syscalls/syscall_n64.tbl

Cc: Adrian Hunter 
Cc: Andrew Morton 
Cc: H J Lu 
Cc: Ian Rogers 
Cc: Ingo Molnar 
Cc: Jeff Xu 
Cc: Jiri Olsa 
Cc: Namhyung Kim 
Link: https://lore.kernel.org/lkml/ZlXlo4TNcba4wnVZ@x1
Signed-off-by: Arnaldo Carvalho de Melo

tools headers: Synchronize linux/bits.h with the kernel sources

2024-04-27T01:13:10+00:00

To pick up the changes in this cset:

   3c7a8e190bc58081 ("uapi: introduce uapi-friendly macros for GENMASK")

That just causes perf to rebuild. Its just some macros going to an uapi
header that we now have to grab a copy into tools/ as well.

This addresses this perf build warning:

  Warning: Kernel ABI header differences:
    diff -u tools/include/linux/bits.h include/linux/bits.h

Cc: Adrian Hunter 
Cc: Ian Rogers 
Cc: Jiri Olsa 
Cc: Kan Liang 
Cc: Namhyung Kim 
Cc: Paolo Bonzini 
Link: https://lore.kernel.org/lkml/ZiwJsFOBez0MS4r9@x1
Signed-off-by: Arnaldo Carvalho de Melo

tools headers: Remove now unused copies of uapi/{fcntl,openat2}.h and asm/fcntl.h

2024-03-21T13:41:27+00:00

These were used to build perf to provide defines not available in older
distros, but this was back in 2017, nowadays all the distros that are
supported and I have build containers for work using just the system
headers, so ditch them.

Some of these older distros may not have things that are used in 'perf
trace', but then they also don't have libtraceevent packages, so don't
build 'perf trace'.

Cc: Adrian Hunter 
Cc: Ian Rogers 
Cc: Jiri Olsa 
Cc: Namhyung Kim 
Link: https://lore.kernel.org/lkml/20240315204835.748716-5-acme@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo

tools headers UAPI: Sync unistd.h to pick {list,stat}mount, lsm_{[gs]et_self_attr,list_modules} syscall numbers

2024-01-29T16:05:44+00:00

To pick the changes in these csets:

  d8b0f5465012538c ("wire up syscalls for statmount/listmount")
  5f42375904b08890 ("LSM: wireup Linux Security Module syscalls")

Used in some architectures to create syscall tables.

This addresses this perf build warning:

  Warning: Kernel ABI header differences:
    diff -u tools/include/uapi/asm-generic/unistd.h include/uapi/asm-generic/unistd.h

Cc: Casey Schaufler 
Cc: Christian Brauner 
Cc: Miklos Szeredi 
Cc: Paul Moore 
Cc: Adrian Hunter 
Cc: Ian Rogers 
Cc: Jiri Olsa 
Cc: Namhyung Kim 
Link: https://lore.kernel.org/lkml/ZbfMuAlUMRO9Hqa6@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo

tools headers UAPI: Update tools's copy of unistd.h header

2023-11-22T18:57:46+00:00

tldr; Just FYI, I'm carrying this on the perf tools tree.

Full explanation:

There used to be no copies, with tools/ code using kernel headers
directly. From time to time tools/perf/ broke due to legitimate kernel
hacking. At some point Linus complained about such direct usage. Then we
adopted the current model.

The way these headers are used in perf are not restricted to just
including them to compile something.

There are sometimes used in scripts that convert defines into string
tables, etc, so some change may break one of these scripts, or new MSRs
may use some different #define pattern, etc.

E.g.:

  $ ls -1 tools/perf/trace/beauty/*.sh | head -5
  tools/perf/trace/beauty/arch_errno_names.sh
  tools/perf/trace/beauty/drm_ioctl.sh
  tools/perf/trace/beauty/fadvise.sh
  tools/perf/trace/beauty/fsconfig.sh
  tools/perf/trace/beauty/fsmount.sh
  $
  $ tools/perf/trace/beauty/fadvise.sh
  static const char *fadvise_advices[] = {
        [0] = "NORMAL",
        [1] = "RANDOM",
        [2] = "SEQUENTIAL",
        [3] = "WILLNEED",
        [4] = "DONTNEED",
        [5] = "NOREUSE",
  };
  $

The tools/perf/check-headers.sh script, part of the tools/ build
process, points out changes in the original files.

So its important not to touch the copies in tools/ when doing changes in
the original kernel headers, that will be done later, when
check-headers.sh inform about the change to the perf tools hackers.

Cc: Arnd Bergmann 
Cc: linux-arch@vger.kernel.org
Signed-off-by: Namhyung Kim 
Link: https://lore.kernel.org/r/20231121225650.390246-6-namhyung@kernel.org

Merge tag 'asm-generic-6.7' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic

2023-11-02T01:28:33+00:00

Pull ia64 removal and asm-generic updates from Arnd Bergmann:

 - The ia64 architecture gets its well-earned retirement as planned,
   now that there is one last (mostly) working release that will be
   maintained as an LTS kernel.

 - The architecture specific system call tables are updated for the
   added map_shadow_stack() syscall and to remove references to the
   long-gone sys_lookup_dcookie() syscall.

* tag 'asm-generic-6.7' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic:
  hexagon: Remove unusable symbols from the ptrace.h uapi
  asm-generic: Fix spelling of architecture
  arch: Reserve map_shadow_stack() syscall number for all architectures
  syscalls: Cleanup references to sys_lookup_dcookie()
  Documentation: Drop or replace remaining mentions of IA64
  lib/raid6: Drop IA64 support
  Documentation: Drop IA64 from feature descriptions
  kernel: Drop IA64 support from sig_fault handlers
  arch: Remove Itanium (IA-64) architecture

syscalls: Cleanup references to sys_lookup_dcookie()

2023-10-03T17:51:37+00:00

commit 'be65de6b03aa ("fs: Remove dcookies support")' removed the
syscall definition for lookup_dcookie.  However, syscall tables still
point to the old sys_lookup_dcookie() definition. Update syscall tables
of all architectures to directly point to sys_ni_syscall() instead.

Signed-off-by: Sohil Mehta 
Reviewed-by: Randy Dunlap 
Acked-by: Namhyung Kim  # for perf
Acked-by: Russell King (Oracle) 
Acked-by: Geert Uytterhoeven 
Signed-off-by: Arnd Bergmann

tools headers UAPI: Sync files changed by new fchmodat2 and map_shadow_stack syscalls with the kernel sources

2023-09-13T11:24:51+00:00

To pick the changes in these csets:

  c35559f94ebc3e3b ("x86/shstk: Introduce map_shadow_stack syscall")
  78252deb023cf087 ("arch: Register fchmodat2, usually as syscall 452")

That add support for this new syscall in tools such as 'perf trace'.

For instance, this is now possible:

  # perf trace -v -e fchmodat*,map_shadow_stack --max-events=4
  Using CPUID AuthenticAMD-25-21-0
  Reusing "openat" BPF sys_enter augmenter for "fchmodat"
  event qualifier tracepoint filter: (common_pid != 3499340 && common_pid != 11259) && (id == 268 || id == 452 || id == 453)
  ^C#

  And it'll work as with other syscalls, for instance openat:

  # perf trace -e openat* --max-events=4
     0.000 ( 0.015 ms): systemd-oomd/1150 openat(dfd: CWD, filename: "/proc/meminfo", flags: RDONLY|CLOEXEC)    = 11
     0.068 ( 0.019 ms): systemd-oomd/1150 openat(dfd: CWD, filename: "/sys/fs/cgroup/user.slice/user-1001.slice/user@1001.service/memory.pressure", flags: RDONLY|CLOEXEC) = 11
     0.119 ( 0.008 ms): systemd-oomd/1150 openat(dfd: CWD, filename: "/sys/fs/cgroup/user.slice/user-1001.slice/user@1001.service/memory.current", flags: RDONLY|CLOEXEC) = 11
     0.138 ( 0.006 ms): systemd-oomd/1150 openat(dfd: CWD, filename: "/sys/fs/cgroup/user.slice/user-1001.slice/user@1001.service/memory.min", flags: RDONLY|CLOEXEC) = 11
  #

That is the filter expression attached to the raw_syscalls:sys_{enter,exit}
tracepoints.

  $ find tools/perf/arch/ -name "syscall*tbl" | xargs grep -E fchmodat\|sys_map_shadow_stack
  tools/perf/arch/mips/entry/syscalls/syscall_n64.tbl:258	n64	fchmodat			sys_fchmodat
  tools/perf/arch/mips/entry/syscalls/syscall_n64.tbl:452	n64	fchmodat2			sys_fchmodat2
  tools/perf/arch/powerpc/entry/syscalls/syscall.tbl:297	common	fchmodat			sys_fchmodat
  tools/perf/arch/powerpc/entry/syscalls/syscall.tbl:452	common	fchmodat2			sys_fchmodat2
  tools/perf/arch/s390/entry/syscalls/syscall.tbl:299  common	fchmodat		sys_fchmodat			sys_fchmodat
  tools/perf/arch/s390/entry/syscalls/syscall.tbl:452  common	fchmodat2		sys_fchmodat2			sys_fchmodat2
  tools/perf/arch/x86/entry/syscalls/syscall_64.tbl:268	common	fchmodat		sys_fchmodat
  tools/perf/arch/x86/entry/syscalls/syscall_64.tbl:452	common	fchmodat2		sys_fchmodat2
  tools/perf/arch/x86/entry/syscalls/syscall_64.tbl:453	64	map_shadow_stack	sys_map_shadow_stack
  $

  $ grep -Ew map_shadow_stack\|fchmodat2 /tmp/build/perf-tools/arch/x86/include/generated/asm/syscalls_64.c
	[452] = "fchmodat2",
	[453] = "map_shadow_stack",
  $

This addresses these perf build warnings:

  Warning: Kernel ABI header differences:
    diff -u tools/include/uapi/asm-generic/unistd.h include/uapi/asm-generic/unistd.h
    diff -u tools/perf/arch/x86/entry/syscalls/syscall_64.tbl arch/x86/entry/syscalls/syscall_64.tbl
    diff -u tools/perf/arch/powerpc/entry/syscalls/syscall.tbl arch/powerpc/kernel/syscalls/syscall.tbl
    diff -u tools/perf/arch/s390/entry/syscalls/syscall.tbl arch/s390/kernel/syscalls/syscall.tbl
    diff -u tools/perf/arch/mips/entry/syscalls/syscall_n64.tbl arch/mips/kernel/syscalls/syscall_n64.tbl

Cc: Adrian Hunter 
Cc: Christian Brauner 
Cc: Dave Hansen 
Cc: Ian Rogers 
Cc: Jiri Olsa 
Cc: Namhyung Kim 
Cc: Palmer Dabbelt 
Cc: Rick Edgecombe 
Link: https://lore.kernel.org/lkml/ZP8bE7aXDBu%2Fdrak@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo