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linux/tools/include/uapi/linux/prctl.h

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tools headers: Synchronize kernel ABI headers wrt SPDX tags Two more, that were just in perf/core and thus weren't covered by Ingo's latest headers synch, kcmp.h and prctl.h, silencing this: Warning: Kernel ABI header at 'tools/include/uapi/linux/kcmp.h' differs from latest version at 'include/uapi/linux/kcmp.h' Warning: Kernel ABI header at 'tools/include/uapi/linux/prctl.h' differs from latest version at 'include/uapi/linux/prctl.h' Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-2a0r7iybyqpkftllyy5t9hfk@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-11-07 13:41:35 -03:00
tools include uapi: Grab a copy of linux/prctl.h We will use it to generate tables for beautifying prctl's 'option' arg and some of the others eventually. Cc: Andy Lutomirski <luto@kernel.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-cg8mpmz4hk9nfih685emnbk9@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-10-26 14:41:01 -03:00
docs: Fix some broken references 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>
2018-05-08 15:14:57 -03:00
tools include uapi: Grab a copy of linux/prctl.h We will use it to generate tables for beautifying prctl's 'option' arg and some of the others eventually. Cc: Andy Lutomirski <luto@kernel.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-cg8mpmz4hk9nfih685emnbk9@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-10-26 14:41:01 -03:00
tools headers: Synchronize prctl.h ABI header To pick up changes from: 2d2123bc7c7f ("arm64/sve: Add prctl controls for userspace vector length management") 7582e22038a2 ("arm64/sve: Backend logic for setting the vector length") That showed a limitation of the regexp used in tools/perf/trace/beauty/prctl_option.sh, that matches only PR_{SET,GET}_, but should match a few more, like PR_MPX_*, PR_CAP_* and the one added by the above commit, PR_SVE_SET_*. This silences this warning when building tools/perf: Warning: Kernel ABI header at 'tools/include/uapi/linux/prctl.h' differs from latest version at 'include/uapi/linux/prctl.h' Support for those extra prctl options should be left for the next merge window tho. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Dave Martin <Dave.Martin@arm.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Cc: Will Deacon <will.deacon@arm.com> Link: https://lkml.kernel.org/n/tip-r52dsyuzy04qzqyfcifjs35t@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-11-27 12:11:02 -03:00
tools headers: Synchronize prctl.h ABI header To pick up changes from: $ git log --oneline -2 -i include/uapi/linux/prctl.h 356e4bfff2c5 prctl: Add force disable speculation b617cfc85816 prctl: Add speculation control prctls $ tools/perf/trace/beauty/prctl_option.sh > before.c $ cp include/uapi/linux/prctl.h tools/include/uapi/linux/prctl.h $ tools/perf/trace/beauty/prctl_option.sh > after.c $ diff -u before.c after.c --- before.c 2018-06-01 10:39:53.834073962 -0300 +++ after.c 2018-06-01 10:42:11.307985394 -0300 @@ -35,6 +35,8 @@ [42] = "GET_THP_DISABLE", [45] = "SET_FP_MODE", [46] = "GET_FP_MODE", + [52] = "GET_SPECULATION_CTRL", + [53] = "SET_SPECULATION_CTRL", }; static const char *prctl_set_mm_options[] = { [1] = "START_CODE", $ This will be used by 'perf trace' to show these strings when beautifying the prctl syscall args. At some point we'll be able to say something like: 'perf trace --all-cpus -e prctl(option=*SPEC*)' To filter by arg by name. This silences this warning when building tools/perf: Warning: Kernel ABI header at 'tools/include/uapi/linux/prctl.h' differs from latest version at 'include/uapi/linux/prctl.h' Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wang Nan <wangnan0@huawei.com> Link: https://lkml.kernel.org/n/tip-zztsptwhc264r8wg44tqh5gp@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2018-06-01 10:42:31 -03:00
x86/speculation: Add prctl() control for indirect branch speculation 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
2018-11-25 19:33:53 +01:00
tools headers: Synchronize prctl.h ABI header To pick up changes from: $ git log --oneline -2 -i include/uapi/linux/prctl.h 356e4bfff2c5 prctl: Add force disable speculation b617cfc85816 prctl: Add speculation control prctls $ tools/perf/trace/beauty/prctl_option.sh > before.c $ cp include/uapi/linux/prctl.h tools/include/uapi/linux/prctl.h $ tools/perf/trace/beauty/prctl_option.sh > after.c $ diff -u before.c after.c --- before.c 2018-06-01 10:39:53.834073962 -0300 +++ after.c 2018-06-01 10:42:11.307985394 -0300 @@ -35,6 +35,8 @@ [42] = "GET_THP_DISABLE", [45] = "SET_FP_MODE", [46] = "GET_FP_MODE", + [52] = "GET_SPECULATION_CTRL", + [53] = "SET_SPECULATION_CTRL", }; static const char *prctl_set_mm_options[] = { [1] = "START_CODE", $ This will be used by 'perf trace' to show these strings when beautifying the prctl syscall args. At some point we'll be able to say something like: 'perf trace --all-cpus -e prctl(option=*SPEC*)' To filter by arg by name. This silences this warning when building tools/perf: Warning: Kernel ABI header at 'tools/include/uapi/linux/prctl.h' differs from latest version at 'include/uapi/linux/prctl.h' Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wang Nan <wangnan0@huawei.com> Link: https://lkml.kernel.org/n/tip-zztsptwhc264r8wg44tqh5gp@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2018-06-01 10:42:31 -03:00
x86/speculation: Add PR_SPEC_DISABLE_NOEXEC 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
2019-01-16 17:01:36 -05:00
tools headers: Synchronize prctl.h ABI header To pick up changes from: $ git log --oneline -2 -i include/uapi/linux/prctl.h 356e4bfff2c5 prctl: Add force disable speculation b617cfc85816 prctl: Add speculation control prctls $ tools/perf/trace/beauty/prctl_option.sh > before.c $ cp include/uapi/linux/prctl.h tools/include/uapi/linux/prctl.h $ tools/perf/trace/beauty/prctl_option.sh > after.c $ diff -u before.c after.c --- before.c 2018-06-01 10:39:53.834073962 -0300 +++ after.c 2018-06-01 10:42:11.307985394 -0300 @@ -35,6 +35,8 @@ [42] = "GET_THP_DISABLE", [45] = "SET_FP_MODE", [46] = "GET_FP_MODE", + [52] = "GET_SPECULATION_CTRL", + [53] = "SET_SPECULATION_CTRL", }; static const char *prctl_set_mm_options[] = { [1] = "START_CODE", $ This will be used by 'perf trace' to show these strings when beautifying the prctl syscall args. At some point we'll be able to say something like: 'perf trace --all-cpus -e prctl(option=*SPEC*)' To filter by arg by name. This silences this warning when building tools/perf: Warning: Kernel ABI header at 'tools/include/uapi/linux/prctl.h' differs from latest version at 'include/uapi/linux/prctl.h' Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wang Nan <wangnan0@huawei.com> Link: https://lkml.kernel.org/n/tip-zztsptwhc264r8wg44tqh5gp@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2018-06-01 10:42:31 -03:00
tools headers uapi: Sync prctl.h with the kernel sources 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>
2019-01-03 14:56:20 -03:00
tools include uapi: Grab a copy of linux/prctl.h We will use it to generate tables for beautifying prctl's 'option' arg and some of the others eventually. Cc: Andy Lutomirski <luto@kernel.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-cg8mpmz4hk9nfih685emnbk9@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-10-26 14:41:01 -03:00