linux-toradex.git/tools/include/uapi/linux/prctl.h, branch v5.17-rc1 Linux kernel for Apalis and Colibri modules tools headers UAPI: Sync linux/prctl.h with the kernel sources 2021-11-13T21:11:51+00:00 Arnaldo Carvalho de Melo acme@redhat.com 2021-02-11T15:50:52+00:00 49024204322cbfff892a28a67ad813cd41b6be81 To pick the changes in: 61bc346ce64a3864 ("uapi/linux/prctl: provide macro definitions for the PR_SCHED_CORE type argument") That don't result in any changes in tooling: $ tools/perf/trace/beauty/prctl_option.sh > before $ cp include/uapi/linux/prctl.h tools/include/uapi/linux/prctl.h $ tools/perf/trace/beauty/prctl_option.sh > after $ diff -u before after $ Just silences this perf tools build warning: Warning: Kernel ABI header at 'tools/include/uapi/linux/prctl.h' differs from latest version at 'include/uapi/linux/prctl.h' diff -u tools/include/uapi/linux/prctl.h include/uapi/linux/prctl.h Cc: Christian Brauner <christian.brauner@ubuntu.com> Cc: Eugene Syromiatnikov <esyr@redhat.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> 
To pick the changes in:

  61bc346ce64a3864 ("uapi/linux/prctl: provide macro definitions for the PR_SCHED_CORE type argument")

That don't result in any changes in tooling:

  $ tools/perf/trace/beauty/prctl_option.sh > before
  $ cp include/uapi/linux/prctl.h tools/include/uapi/linux/prctl.h
  $ tools/perf/trace/beauty/prctl_option.sh > after
  $ diff -u before after
  $

Just silences this perf tools build warning:

  Warning: Kernel ABI header at 'tools/include/uapi/linux/prctl.h' differs from latest version at 'include/uapi/linux/prctl.h'
  diff -u tools/include/uapi/linux/prctl.h include/uapi/linux/prctl.h

Cc: Christian Brauner <christian.brauner@ubuntu.com>
Cc: Eugene Syromiatnikov <esyr@redhat.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
arm64: mte: change PR_MTE_TCF_NONE back into an unsigned long 2021-11-08T10:04:33+00:00 Peter Collingbourne pcc@google.com 2021-11-05T23:08:29+00:00 aedad3e1c6ddec234b63cfb57ac231da0f680e50 This constant was previously an unsigned long, but was changed into an int in commit 433c38f40f6a ("arm64: mte: change ASYNC and SYNC TCF settings into bitfields"). This ended up causing spurious unsigned-signed comparison warnings in expressions such as: (x & PR_MTE_TCF_MASK) != PR_MTE_TCF_NONE Therefore, change it back into an unsigned long to silence these warnings. Link: https://linux-review.googlesource.com/id/I07a72310db30227a5b7d789d0b817d78b657c639 Signed-off-by: Peter Collingbourne <pcc@google.com> Link: https://lore.kernel.org/r/20211105230829.2254790-1-pcc@google.com Signed-off-by: Will Deacon <will@kernel.org> 
This constant was previously an unsigned long, but was changed
into an int in commit 433c38f40f6a ("arm64: mte: change ASYNC and
SYNC TCF settings into bitfields"). This ended up causing spurious
unsigned-signed comparison warnings in expressions such as:

(x & PR_MTE_TCF_MASK) != PR_MTE_TCF_NONE

Therefore, change it back into an unsigned long to silence these
warnings.

Link: https://linux-review.googlesource.com/id/I07a72310db30227a5b7d789d0b817d78b657c639
Signed-off-by: Peter Collingbourne <pcc@google.com>
Link: https://lore.kernel.org/r/20211105230829.2254790-1-pcc@google.com
Signed-off-by: Will Deacon <will@kernel.org>
tools headers UAPI: Sync linux/prctl.h with the kernel sources 2021-09-10T21:15:22+00:00 Arnaldo Carvalho de Melo acme@redhat.com 2021-02-11T15:50:52+00:00 2c3ef25c4a60cc18cf3f05a74c78220748f25684 To pick the changes in: 433c38f40f6a81cf ("arm64: mte: change ASYNC and SYNC TCF settings into bitfields") e893bb1bb4d2eb63 ("x86, prctl: Hook L1D flushing in via prctl") That don't result in any changes in tooling: $ tools/perf/trace/beauty/prctl_option.sh > before $ cp include/uapi/linux/prctl.h tools/include/uapi/linux/prctl.h $ tools/perf/trace/beauty/prctl_option.sh > after $ diff -u before after $ Just silences this perf tools build warning: Warning: Kernel ABI header at 'tools/include/uapi/linux/prctl.h' differs from latest version at 'include/uapi/linux/prctl.h' diff -u tools/include/uapi/linux/prctl.h include/uapi/linux/prctl.h Cc: Balbir Singh <sblbir@amazon.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Peter Collingbourne <pcc@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> 
To pick the changes in:

  433c38f40f6a81cf ("arm64: mte: change ASYNC and SYNC TCF settings into bitfields")
  e893bb1bb4d2eb63 ("x86, prctl: Hook L1D flushing in via prctl")

That don't result in any changes in tooling:

  $ tools/perf/trace/beauty/prctl_option.sh > before
  $ cp include/uapi/linux/prctl.h tools/include/uapi/linux/prctl.h
  $ tools/perf/trace/beauty/prctl_option.sh > after
  $ diff -u before after
  $

Just silences this perf tools build warning:

  Warning: Kernel ABI header at 'tools/include/uapi/linux/prctl.h' differs from latest version at 'include/uapi/linux/prctl.h'
  diff -u tools/include/uapi/linux/prctl.h include/uapi/linux/prctl.h

Cc: Balbir Singh <sblbir@amazon.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Peter Collingbourne <pcc@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
sched: prctl() core-scheduling interface 2021-05-12T09:43:31+00:00 Chris Hyser chris.hyser@oracle.com 2021-03-24T21:40:15+00:00 7ac592aa35a684ff1858fb9ec282886b9e3575ac This patch provides support for setting and copying core scheduling 'task cookies' between threads (PID), processes (TGID), and process groups (PGID). The value of core scheduling isn't that tasks don't share a core, 'nosmt' can do that. The value lies in exploiting all the sharing opportunities that exist to recover possible lost performance and that requires a degree of flexibility in the API. From a security perspective (and there are others), the thread, process and process group distinction is an existent hierarchal categorization of tasks that reflects many of the security concerns about 'data sharing'. For example, protecting against cache-snooping by a thread that can just read the memory directly isn't all that useful. With this in mind, subcommands to CREATE/SHARE (TO/FROM) provide a mechanism to create and share cookies. CREATE/SHARE_TO specify a target pid with enum pidtype used to specify the scope of the targeted tasks. For example, PIDTYPE_TGID will share the cookie with the process and all of it's threads as typically desired in a security scenario. API: prctl(PR_SCHED_CORE, PR_SCHED_CORE_GET, tgtpid, pidtype, &cookie) prctl(PR_SCHED_CORE, PR_SCHED_CORE_CREATE, tgtpid, pidtype, NULL) prctl(PR_SCHED_CORE, PR_SCHED_CORE_SHARE_TO, tgtpid, pidtype, NULL) prctl(PR_SCHED_CORE, PR_SCHED_CORE_SHARE_FROM, srcpid, pidtype, NULL) where 'tgtpid/srcpid == 0' implies the current process and pidtype is kernel enum pid_type {PIDTYPE_PID, PIDTYPE_TGID, PIDTYPE_PGID, ...}. For return values, EINVAL, ENOMEM are what they say. ESRCH means the tgtpid/srcpid was not found. EPERM indicates lack of PTRACE permission access to tgtpid/srcpid. ENODEV indicates your machines lacks SMT. [peterz: complete rewrite] Signed-off-by: Chris Hyser <chris.hyser@oracle.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Tested-by: Don Hiatt <dhiatt@digitalocean.com> Tested-by: Hongyu Ning <hongyu.ning@linux.intel.com> Tested-by: Vincent Guittot <vincent.guittot@linaro.org> Link: https://lkml.kernel.org/r/20210422123309.039845339@infradead.org 
This patch provides support for setting and copying core scheduling
'task cookies' between threads (PID), processes (TGID), and process
groups (PGID).

The value of core scheduling isn't that tasks don't share a core,
'nosmt' can do that. The value lies in exploiting all the sharing
opportunities that exist to recover possible lost performance and that
requires a degree of flexibility in the API.

From a security perspective (and there are others), the thread,
process and process group distinction is an existent hierarchal
categorization of tasks that reflects many of the security concerns
about 'data sharing'. For example, protecting against cache-snooping
by a thread that can just read the memory directly isn't all that
useful.

With this in mind, subcommands to CREATE/SHARE (TO/FROM) provide a
mechanism to create and share cookies. CREATE/SHARE_TO specify a
target pid with enum pidtype used to specify the scope of the targeted
tasks. For example, PIDTYPE_TGID will share the cookie with the
process and all of it's threads as typically desired in a security
scenario.

API:

  prctl(PR_SCHED_CORE, PR_SCHED_CORE_GET, tgtpid, pidtype, &cookie)
  prctl(PR_SCHED_CORE, PR_SCHED_CORE_CREATE, tgtpid, pidtype, NULL)
  prctl(PR_SCHED_CORE, PR_SCHED_CORE_SHARE_TO, tgtpid, pidtype, NULL)
  prctl(PR_SCHED_CORE, PR_SCHED_CORE_SHARE_FROM, srcpid, pidtype, NULL)

where 'tgtpid/srcpid == 0' implies the current process and pidtype is
kernel enum pid_type {PIDTYPE_PID, PIDTYPE_TGID, PIDTYPE_PGID, ...}.

For return values, EINVAL, ENOMEM are what they say. ESRCH means the
tgtpid/srcpid was not found. EPERM indicates lack of PTRACE permission
access to tgtpid/srcpid. ENODEV indicates your machines lacks SMT.

[peterz: complete rewrite]
Signed-off-by: Chris Hyser <chris.hyser@oracle.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Tested-by: Don Hiatt <dhiatt@digitalocean.com>
Tested-by: Hongyu Ning <hongyu.ning@linux.intel.com>
Tested-by: Vincent Guittot <vincent.guittot@linaro.org>
Link: https://lkml.kernel.org/r/20210422123309.039845339@infradead.org
tools headers UAPI: Sync linux/prctl.h with the kernel sources 2021-05-10T12:01:00+00:00 Arnaldo Carvalho de Melo acme@redhat.com 2021-05-09T13:06:40+00:00 5a80ee4219a52194f0e815bbceec40eb32c523ec To pick a new prctl introduced in: 201698626fbca1cf ("arm64: Introduce prctl(PR_PAC_{SET,GET}_ENABLED_KEYS)") That results in $ grep prctl tools/perf/trace/beauty/*.sh tools/perf/trace/beauty/prctl_option.sh:printf "static const char *prctl_options[] = {\n" tools/perf/trace/beauty/prctl_option.sh:egrep $regex ${header_dir}/prctl.h | grep -v PR_SET_PTRACER | \ tools/perf/trace/beauty/prctl_option.sh:printf "static const char *prctl_set_mm_options[] = {\n" tools/perf/trace/beauty/prctl_option.sh:egrep $regex ${header_dir}/prctl.h | \ tools/perf/trace/beauty/x86_arch_prctl.sh:prctl_arch_header=${x86_header_dir}/prctl.h tools/perf/trace/beauty/x86_arch_prctl.sh: printf "#define x86_arch_prctl_codes_%d_offset %s\n" $idx $first_entry tools/perf/trace/beauty/x86_arch_prctl.sh: printf "static const char *x86_arch_prctl_codes_%d[] = {\n" $idx tools/perf/trace/beauty/x86_arch_prctl.sh: egrep -q $regex ${prctl_arch_header} && \ tools/perf/trace/beauty/x86_arch_prctl.sh: (egrep $regex ${prctl_arch_header} | \ $ tools/perf/trace/beauty/prctl_option.sh > before $ cp include/uapi/linux/prctl.h tools/include/uapi/linux/prctl.h $ tools/perf/trace/beauty/prctl_option.sh > after $ diff -u before after --- before 2021-05-09 10:06:10.064559675 -0300 +++ after 2021-05-09 10:06:21.319791396 -0300 @@ -54,6 +54,8 @@ [57] = "SET_IO_FLUSHER", [58] = "GET_IO_FLUSHER", [59] = "SET_SYSCALL_USER_DISPATCH", + [60] = "PAC_SET_ENABLED_KEYS", + [61] = "PAC_GET_ENABLED_KEYS", }; static const char *prctl_set_mm_options[] = { [1] = "START_CODE", $ Now users can do: # perf trace -e syscalls:sys_enter_prctl --filter "option==PAC_GET_ENABLED_KEYS" ^C# # trace -v -e syscalls:sys_enter_prctl --filter "option==PAC_GET_ENABLED_KEYS" New filter for syscalls:sys_enter_prctl: (option==0x3d) && (common_pid != 5519 && common_pid != 3404) ^C# And also when prctl appears in a session, its options will be translated to the string. Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Peter Collingbourne <pcc@google.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> 
To pick a new prctl introduced in:

  201698626fbca1cf ("arm64: Introduce prctl(PR_PAC_{SET,GET}_ENABLED_KEYS)")

That results in

  $ grep prctl tools/perf/trace/beauty/*.sh
  tools/perf/trace/beauty/prctl_option.sh:printf "static const char *prctl_options[] = {\n"
  tools/perf/trace/beauty/prctl_option.sh:egrep $regex ${header_dir}/prctl.h | grep -v PR_SET_PTRACER | \
  tools/perf/trace/beauty/prctl_option.sh:printf "static const char *prctl_set_mm_options[] = {\n"
  tools/perf/trace/beauty/prctl_option.sh:egrep $regex ${header_dir}/prctl.h | \
  tools/perf/trace/beauty/x86_arch_prctl.sh:prctl_arch_header=${x86_header_dir}/prctl.h
  tools/perf/trace/beauty/x86_arch_prctl.sh:	printf "#define x86_arch_prctl_codes_%d_offset %s\n" $idx $first_entry
  tools/perf/trace/beauty/x86_arch_prctl.sh:	printf "static const char *x86_arch_prctl_codes_%d[] = {\n" $idx
  tools/perf/trace/beauty/x86_arch_prctl.sh:	egrep -q $regex ${prctl_arch_header} && \
  tools/perf/trace/beauty/x86_arch_prctl.sh:	(egrep $regex ${prctl_arch_header} | \
  $ tools/perf/trace/beauty/prctl_option.sh > before
  $ cp include/uapi/linux/prctl.h tools/include/uapi/linux/prctl.h
  $ tools/perf/trace/beauty/prctl_option.sh > after
  $ diff -u before after
  --- before	2021-05-09 10:06:10.064559675 -0300
  +++ after	2021-05-09 10:06:21.319791396 -0300
  @@ -54,6 +54,8 @@
   	[57] = "SET_IO_FLUSHER",
   	[58] = "GET_IO_FLUSHER",
   	[59] = "SET_SYSCALL_USER_DISPATCH",
  +	[60] = "PAC_SET_ENABLED_KEYS",
  +	[61] = "PAC_GET_ENABLED_KEYS",
   };
   static const char *prctl_set_mm_options[] = {
   	[1] = "START_CODE",
  $

Now users can do:

  # perf trace -e syscalls:sys_enter_prctl --filter "option==PAC_GET_ENABLED_KEYS"
^C#
  # trace -v -e syscalls:sys_enter_prctl --filter "option==PAC_GET_ENABLED_KEYS"
  New filter for syscalls:sys_enter_prctl: (option==0x3d) && (common_pid != 5519 && common_pid != 3404)
^C#

And also when prctl appears in a session, its options will be
translated to the string.

Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Peter Collingbourne <pcc@google.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
tools headers UAPI: Sync linux/prctl.h with the kernel sources 2021-02-11T15:50:52+00:00 Arnaldo Carvalho de Melo acme@redhat.com 2021-02-11T15:50:52+00:00 fc52336288e4ea129c5041573c7ba9cb8e0b202f To pick a new prctl introduced in: 36a6c843fd0d8e02 ("entry: Use different define for selector variable in SUD") That don't result in any changes in tooling: $ tools/perf/trace/beauty/prctl_option.sh > before $ cp include/uapi/linux/prctl.h tools/include/uapi/linux/prctl.h $ tools/perf/trace/beauty/prctl_option.sh > after $ diff -u before after Just silences this perf tools build warning: Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Gabriel Krisman Bertazi <krisman@collabora.com> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> 
To pick a new prctl introduced in:

  36a6c843fd0d8e02 ("entry: Use different define for selector variable in SUD")

That don't result in any changes in tooling:

  $ tools/perf/trace/beauty/prctl_option.sh > before
  $ cp include/uapi/linux/prctl.h tools/include/uapi/linux/prctl.h
  $ tools/perf/trace/beauty/prctl_option.sh > after
  $ diff -u before after

Just silences this perf tools build warning:

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Gabriel Krisman Bertazi <krisman@collabora.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
tools headers UAPI: Sync linux/prctl.h with the kernel sources 2020-12-18T20:32:28+00:00 Arnaldo Carvalho de Melo acme@redhat.com 2020-12-17T18:01:08+00:00 d6dbfceec5dd41becbe8c47c402240925d31036a To pick a new prctl introduced in: 1446e1df9eb183fd ("kernel: Implement selective syscall userspace redirection") That results in: $ tools/perf/trace/beauty/prctl_option.sh > before $ cp include/uapi/linux/prctl.h tools/include/uapi/linux/prctl.h $ tools/perf/trace/beauty/prctl_option.sh > after $ diff -u before after --- before 2020-12-17 15:00:42.012537367 -0300 +++ after 2020-12-17 15:00:49.832699463 -0300 @@ -53,6 +53,7 @@ [56] = "GET_TAGGED_ADDR_CTRL", [57] = "SET_IO_FLUSHER", [58] = "GET_IO_FLUSHER", + [59] = "SET_SYSCALL_USER_DISPATCH", }; static const char *prctl_set_mm_options[] = { [1] = "START_CODE", $ Now users can do: # perf trace -e syscalls:sys_enter_prctl --filter "option==SET_SYSCALL_USER_DISPATCH" ^C# # trace -v -e syscalls:sys_enter_prctl --filter "option==SET_SYSCALL_USER_DISPATCH" New filter for syscalls:sys_enter_prctl: (option==0x3b) && (common_pid != 5519 && common_pid != 3404) ^C# And also when prctl appears in a session, its options will be translated to the string. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Gabriel Krisman Bertazi <krisman@collabora.com> Cc: Ian Rogers <irogers@google.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> 
To pick a new prctl introduced in:

  1446e1df9eb183fd ("kernel: Implement selective syscall userspace redirection")

That results in:

  $ tools/perf/trace/beauty/prctl_option.sh > before
  $ cp include/uapi/linux/prctl.h tools/include/uapi/linux/prctl.h
  $ tools/perf/trace/beauty/prctl_option.sh > after
  $ diff -u before after
  --- before	2020-12-17 15:00:42.012537367 -0300
  +++ after	2020-12-17 15:00:49.832699463 -0300
  @@ -53,6 +53,7 @@
   	[56] = "GET_TAGGED_ADDR_CTRL",
   	[57] = "SET_IO_FLUSHER",
   	[58] = "GET_IO_FLUSHER",
  +	[59] = "SET_SYSCALL_USER_DISPATCH",
   };
   static const char *prctl_set_mm_options[] = {
   	[1] = "START_CODE",
  $

Now users can do:

  # perf trace -e syscalls:sys_enter_prctl --filter "option==SET_SYSCALL_USER_DISPATCH"
^C#
  # trace -v -e syscalls:sys_enter_prctl --filter "option==SET_SYSCALL_USER_DISPATCH"
  New filter for syscalls:sys_enter_prctl: (option==0x3b) && (common_pid != 5519 && common_pid != 3404)
^C#

And also when prctl appears in a session, its options will be
translated to the string.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Gabriel Krisman Bertazi <krisman@collabora.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
tools headers UAPI: Sync prctl.h with the kernel sources 2020-11-03T11:34:58+00:00 Arnaldo Carvalho de Melo acme@redhat.com 2020-10-19T15:38:16+00:00 ad6330ac2c5a38e5573cb6ae8ff75288bfd96325 To get the changes in: 1c101da8b971a366 ("arm64: mte: Allow user control of the tag check mode via prctl()") af5ce95282dc99d0 ("arm64: mte: Allow user control of the generated random tags via prctl()") Which don't cause any change in tooling, only addresses this perf build warning: Warning: Kernel ABI header at 'tools/include/uapi/linux/prctl.h' differs from latest version at 'include/uapi/linux/prctl.h' diff -u tools/include/uapi/linux/prctl.h include/uapi/linux/prctl.h Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Ian Rogers <irogers@google.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> 
To get the changes in:

  1c101da8b971a366 ("arm64: mte: Allow user control of the tag check mode via prctl()")
  af5ce95282dc99d0 ("arm64: mte: Allow user control of the generated random tags via prctl()")

Which don't cause any change in tooling, only addresses this perf build
warning:

  Warning: Kernel ABI header at 'tools/include/uapi/linux/prctl.h' differs from latest version at 'include/uapi/linux/prctl.h'
  diff -u tools/include/uapi/linux/prctl.h include/uapi/linux/prctl.h

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
tools headers UAPI: Sync prctl.h with the kernel sources 2020-02-11T19:41:50+00:00 Arnaldo Carvalho de Melo acme@redhat.com 2020-02-11T18:25:21+00:00 fc9199d46e644e6a978f69195cb849b21d2f485c To get the changes in: 8d19f1c8e193 ("prctl: PR_{G,S}ET_IO_FLUSHER to support controlling memory reclaim") Which ends up having this effect in tooling, i.e. the addition of the support to those prctl's options: $ tools/perf/trace/beauty/prctl_option.sh > before $ cp include/uapi/linux/prctl.h tools/include/uapi/linux/prctl.h $ git diff diff --git a/tools/include/uapi/linux/prctl.h b/tools/include/uapi/linux/prctl.h index 7da1b37b27aa..07b4f8131e36 100644 --- a/tools/include/uapi/linux/prctl.h +++ b/tools/include/uapi/linux/prctl.h @@ -234,4 +234,8 @@ struct prctl_mm_map { #define PR_GET_TAGGED_ADDR_CTRL 56 # define PR_TAGGED_ADDR_ENABLE (1UL << 0) +/* Control reclaim behavior when allocating memory */ +#define PR_SET_IO_FLUSHER 57 +#define PR_GET_IO_FLUSHER 58 + #endif /* _LINUX_PRCTL_H */ $ tools/perf/trace/beauty/prctl_option.sh > after $ diff -u before after --- before 2020-02-11 15:24:35.339289912 -0300 +++ after 2020-02-11 15:24:56.319711315 -0300 @@ -51,6 +51,8 @@ [54] = "PAC_RESET_KEYS", [55] = "SET_TAGGED_ADDR_CTRL", [56] = "GET_TAGGED_ADDR_CTRL", + [57] = "SET_IO_FLUSHER", + [58] = "GET_IO_FLUSHER", }; static const char *prctl_set_mm_options[] = { [1] = "START_CODE", $ Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Christian Brauner <christian.brauner@ubuntu.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Mike Christie <mchristi@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> 
To get the changes in:

  8d19f1c8e193 ("prctl: PR_{G,S}ET_IO_FLUSHER to support controlling memory reclaim")

Which ends up having this effect in tooling, i.e. the addition of the
support to those prctl's options:

  $ tools/perf/trace/beauty/prctl_option.sh > before
  $ cp include/uapi/linux/prctl.h tools/include/uapi/linux/prctl.h
  $ git diff
  diff --git a/tools/include/uapi/linux/prctl.h b/tools/include/uapi/linux/prctl.h
  index 7da1b37b27aa..07b4f8131e36 100644
  --- a/tools/include/uapi/linux/prctl.h
  +++ b/tools/include/uapi/linux/prctl.h
  @@ -234,4 +234,8 @@ struct prctl_mm_map {
   #define PR_GET_TAGGED_ADDR_CTRL                56
   # define PR_TAGGED_ADDR_ENABLE         (1UL << 0)

  +/* Control reclaim behavior when allocating memory */
  +#define PR_SET_IO_FLUSHER              57
  +#define PR_GET_IO_FLUSHER              58
  +
   #endif /* _LINUX_PRCTL_H */
  $ tools/perf/trace/beauty/prctl_option.sh > after
  $ diff -u before after
  --- before	2020-02-11 15:24:35.339289912 -0300
  +++ after	2020-02-11 15:24:56.319711315 -0300
  @@ -51,6 +51,8 @@
   	[54] = "PAC_RESET_KEYS",
   	[55] = "SET_TAGGED_ADDR_CTRL",
   	[56] = "GET_TAGGED_ADDR_CTRL",
  +	[57] = "SET_IO_FLUSHER",
  +	[58] = "GET_IO_FLUSHER",
   };
   static const char *prctl_set_mm_options[] = {
   	[1] = "START_CODE",
  $

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Christian Brauner <christian.brauner@ubuntu.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Mike Christie <mchristi@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
tools headers uapi: Sync prctl.h with the kernel sources 2019-09-20T17:59:05+00:00 Arnaldo Carvalho de Melo acme@redhat.com 2019-09-20T17:40:30+00:00 7b678ccdf5f608c408e1368e525ed191ca456bcf To get the changes in: 63f0c6037965 ("arm64: Introduce prctl() options to control the tagged user addresses ABI") that introduces prctl options that then automagically gets catched by the prctl cmd table generator, and thus supported in the 'perf trace' prctl beautifier for the 'option' argument: $ tools/perf/trace/beauty/prctl_option.sh > after $ diff -u before after --- before 2019-09-20 14:38:41.386720870 -0300 +++ after 2019-09-20 14:40:02.583990802 -0300 @@ -49,6 +49,8 @@ [52] = "GET_SPECULATION_CTRL", [53] = "SET_SPECULATION_CTRL", [54] = "PAC_RESET_KEYS", + [55] = "SET_TAGGED_ADDR_CTRL", + [56] = "GET_TAGGED_ADDR_CTRL", }; static const char *prctl_set_mm_options[] = { [1] = "START_CODE", $ For now just the translation of 55 and 56 to the respecting strings are done, more work needed to allow for filters to be used using strings. This, for instance, already works: # perf record -e syscalls:sys_enter_close --filter="fd==4" # perf script | head -5 gpm 1018 [006] 21327.171436: syscalls:sys_enter_close: fd: 0x00000004 gpm 1018 [006] 21329.171583: syscalls:sys_enter_close: fd: 0x00000004 bash 4882 [002] 21330.785496: syscalls:sys_enter_close: fd: 0x00000004 bash 20672 [001] 21330.785719: syscalls:sys_enter_close: fd: 0x00000004 find 20672 [001] 21330.789082: syscalls:sys_enter_close: fd: 0x00000004 # perf record -e syscalls:sys_enter_close --filter="fd>=4" ^C[ perf record: Woken up 1 times to write data ] # perf script | head -5 gpm 1018 [005] 21401.178501: syscalls:sys_enter_close: fd: 0x00000004 gsd-housekeepin 2287 [006] 21402.225365: syscalls:sys_enter_close: fd: 0x0000000b gsd-housekeepin 2287 [006] 21402.226234: syscalls:sys_enter_close: fd: 0x0000000b gsd-housekeepin 2287 [006] 21402.227255: syscalls:sys_enter_close: fd: 0x0000000b gsd-housekeepin 2287 [006] 21402.228088: syscalls:sys_enter_close: fd: 0x0000000b # Being able to pass something like: # perf record -e syscalls:sys_enter_prctl --filter="option=*TAGGED_ADDR*" Should be easy enough, first using tracepoint filters, then via the augmented_raw_syscalls.c BPF method. This addresses this perf build warning: Warning: Kernel ABI header at 'tools/include/uapi/linux/prctl.h' differs from latest version at 'include/uapi/linux/prctl.h' diff -u tools/include/uapi/linux/prctl.h include/uapi/linux/prctl.h Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Brendan Gregg <brendan.d.gregg@gmail.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Luis Cláudio Gonçalves <lclaudio@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Will Deacon <will@kernel.org> Link: https://lkml.kernel.org/n/tip-y8u8kvflooyo9x0if1g3jska@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> 
To get the changes in:

  63f0c6037965 ("arm64: Introduce prctl() options to control the tagged user addresses ABI")

that introduces prctl options that then automagically gets catched by
the prctl cmd table generator, and thus supported in the 'perf trace'
prctl beautifier for the 'option' argument:

  $ tools/perf/trace/beauty/prctl_option.sh  > after
  $ diff -u before after
  --- before	2019-09-20 14:38:41.386720870 -0300
  +++ after	2019-09-20 14:40:02.583990802 -0300
  @@ -49,6 +49,8 @@
   	[52] = "GET_SPECULATION_CTRL",
   	[53] = "SET_SPECULATION_CTRL",
   	[54] = "PAC_RESET_KEYS",
  +	[55] = "SET_TAGGED_ADDR_CTRL",
  +	[56] = "GET_TAGGED_ADDR_CTRL",
   };
   static const char *prctl_set_mm_options[] = {
   	[1] = "START_CODE",
  $

For now just the translation of 55 and 56 to the respecting strings are
done, more work needed to allow for filters to be used using strings.

This, for instance, already works:

  # perf record -e syscalls:sys_enter_close --filter="fd==4"
  # perf script | head -5
               gpm  1018 [006] 21327.171436: syscalls:sys_enter_close: fd: 0x00000004
               gpm  1018 [006] 21329.171583: syscalls:sys_enter_close: fd: 0x00000004
              bash  4882 [002] 21330.785496: syscalls:sys_enter_close: fd: 0x00000004
              bash 20672 [001] 21330.785719: syscalls:sys_enter_close: fd: 0x00000004
              find 20672 [001] 21330.789082: syscalls:sys_enter_close: fd: 0x00000004
  # perf record -e syscalls:sys_enter_close --filter="fd>=4"
  ^C[ perf record: Woken up 1 times to write data ]
  # perf script | head -5
               gpm  1018 [005] 21401.178501: syscalls:sys_enter_close: fd: 0x00000004
   gsd-housekeepin  2287 [006] 21402.225365: syscalls:sys_enter_close: fd: 0x0000000b
   gsd-housekeepin  2287 [006] 21402.226234: syscalls:sys_enter_close: fd: 0x0000000b
   gsd-housekeepin  2287 [006] 21402.227255: syscalls:sys_enter_close: fd: 0x0000000b
   gsd-housekeepin  2287 [006] 21402.228088: syscalls:sys_enter_close: fd: 0x0000000b
  #

Being able to pass something like:

  # perf record -e syscalls:sys_enter_prctl --filter="option=*TAGGED_ADDR*"

Should be easy enough, first using tracepoint filters, then via the
augmented_raw_syscalls.c BPF method.

This addresses this perf build warning:

  Warning: Kernel ABI header at 'tools/include/uapi/linux/prctl.h' differs from latest version at 'include/uapi/linux/prctl.h'
  diff -u tools/include/uapi/linux/prctl.h include/uapi/linux/prctl.h

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Brendan Gregg <brendan.d.gregg@gmail.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Luis Cláudio Gonçalves <lclaudio@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Will Deacon <will@kernel.org>
Link: https://lkml.kernel.org/n/tip-y8u8kvflooyo9x0if1g3jska@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>