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:
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:
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 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:
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:
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>
With the default SPEC_STORE_BYPASS_SECCOMP/SPEC_STORE_BYPASS_PRCTL mode, the TIF_SSBD bit will be inherited when a new task is fork'ed or cloned. It will also remain when a new program is execve'ed. Only certain class of applications (like Java) that can run on behalf of multiple users on a single thread will require disabling speculative store bypass for security purposes. Those applications will call prctl(2) at startup time to disable SSB. They won't rely on the fact the SSB might have been disabled. Other applications that don't need SSBD will just move on without checking if SSBD has been turned on or not. The fact that the TIF_SSBD is inherited across execve(2) boundary will cause performance of applications that don't need SSBD but their predecessors have SSBD on to be unwittingly impacted especially if they write to memory a lot. To remedy this problem, a new PR_SPEC_DISABLE_NOEXEC argument for the PR_SET_SPECULATION_CTRL option of prctl(2) is added to allow applications to specify that the SSBD feature bit on the task structure should be cleared whenever a new program is being execve'ed. Suggested-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Waiman Long <longman@redhat.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Borislav Petkov <bp@alien8.de> Cc: Jonathan Corbet <corbet@lwn.net> Cc: linux-doc@vger.kernel.org Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: David Woodhouse <dwmw@amazon.co.uk> Cc: Jiri Kosina <jikos@kernel.org> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Tim Chen <tim.c.chen@linux.intel.com> Cc: KarimAllah Ahmed <karahmed@amazon.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Link: https://lkml.kernel.org/r/1547676096-3281-1-git-send-email-longman@redhat.com
To get the changes in ba8308856564 ("arm64: add prctl control for
resetting ptrauth keys"), that introduce a prctl with a name that needs
to be catch by the prctl cmd table generator, which will be done in the
next cset.
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kristina Martsenko <kristina.martsenko@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Will Deacon <will.deacon@arm.com>
Link: https://lkml.kernel.org/n/tip-a1pahzc8lci0ey1fjvv1chdm@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Add the PR_SPEC_INDIRECT_BRANCH option for the PR_GET_SPECULATION_CTRL and PR_SET_SPECULATION_CTRL prctls to allow fine grained per task control of indirect branch speculation via STIBP and IBPB. Invocations: Check indirect branch speculation status with - prctl(PR_GET_SPECULATION_CTRL, PR_SPEC_INDIRECT_BRANCH, 0, 0, 0); Enable indirect branch speculation with - prctl(PR_SET_SPECULATION_CTRL, PR_SPEC_INDIRECT_BRANCH, PR_SPEC_ENABLE, 0, 0); Disable indirect branch speculation with - prctl(PR_SET_SPECULATION_CTRL, PR_SPEC_INDIRECT_BRANCH, PR_SPEC_DISABLE, 0, 0); Force disable indirect branch speculation with - prctl(PR_SET_SPECULATION_CTRL, PR_SPEC_INDIRECT_BRANCH, PR_SPEC_FORCE_DISABLE, 0, 0); See Documentation/userspace-api/spec_ctrl.rst. Signed-off-by: Tim Chen <tim.c.chen@linux.intel.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Ingo Molnar <mingo@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Andy Lutomirski <luto@kernel.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Jiri Kosina <jkosina@suse.cz> Cc: Tom Lendacky <thomas.lendacky@amd.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: David Woodhouse <dwmw@amazon.co.uk> Cc: Andi Kleen <ak@linux.intel.com> Cc: Dave Hansen <dave.hansen@intel.com> Cc: Casey Schaufler <casey.schaufler@intel.com> Cc: Asit Mallick <asit.k.mallick@intel.com> Cc: Arjan van de Ven <arjan@linux.intel.com> Cc: Jon Masters <jcm@redhat.com> Cc: Waiman Long <longman9394@gmail.com> Cc: Greg KH <gregkh@linuxfoundation.org> Cc: Dave Stewart <david.c.stewart@intel.com> Cc: Kees Cook <keescook@chromium.org> Cc: stable@vger.kernel.org Link: https://lkml.kernel.org/r/20181125185005.866780996@linutronix.de
As we move stuff around, some doc references are broken. Fix some of them via this script: ./scripts/documentation-file-ref-check --fix Manually checked if the produced result is valid, removing a few false-positives. Acked-by: Takashi Iwai <tiwai@suse.de> Acked-by: Masami Hiramatsu <mhiramat@kernel.org> Acked-by: Stephen Boyd <sboyd@kernel.org> Acked-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com> Acked-by: Mathieu Poirier <mathieu.poirier@linaro.org> Reviewed-by: Coly Li <colyli@suse.de> Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org> Acked-by: Jonathan Corbet <corbet@lwn.net>