linux/arch/x86
Kan Liang cb2252522a perf/x86/intel/uncore: Remove ev_sel_ext bit support for PCU
The ev_sel_ext in PCU_MSR_PMON_CTL is locked on some CPU models, so despite
it being documented in the SDM, if we write 1 to that bit then we can get a #GP
fault.

Which #GP the perf fuzzer happily triggered in Peter Zijlstra's testing.

Also, there are no public events which use that bit, so remove ev_sel_ext
bit support for PCU.

Reported-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Kan Liang <kan.liang@intel.com>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Link: http://lkml.kernel.org/r/1458500301-3594-1-git-send-email-kan.liang@intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-03-21 11:16:19 +01:00
..
boot Merge branch 'x86-boot-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2016-03-15 10:02:25 -07:00
configs x86/defconfigs/32: Set CONFIG_FRAME_WARN to the Kconfig default 2016-03-09 14:53:41 +01:00
crypto Merge branch 'x86/urgent' into x86/asm, to pick up fixes 2016-02-18 09:28:03 +01:00
entry Merge branch 'x86/cleanups' into x86/urgent 2016-03-17 09:44:57 +01:00
events perf/x86/intel/uncore: Remove ev_sel_ext bit support for PCU 2016-03-21 11:16:19 +01:00
ia32 Merge branch 'x86-headers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2015-11-03 21:05:40 -08:00
include x86/cpufeature, perf/x86: Add AMD Accumulated Power Mechanism feature flag 2016-03-21 09:35:29 +01:00
kernel x86/cpufeature, perf/x86: Add AMD Accumulated Power Mechanism feature flag 2016-03-21 09:35:29 +01:00
kvm Merge branch 'x86/cleanups' into x86/urgent 2016-03-17 09:44:57 +01:00
lguest Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2016-03-14 17:58:53 -07:00
lib Merge branch 'x86/cleanups' into x86/urgent 2016-03-17 09:44:57 +01:00
math-emu Merge branch 'x86-headers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2015-11-03 21:05:40 -08:00
mm Merge branch 'x86/cleanups' into x86/urgent 2016-03-17 09:44:57 +01:00
net bpf, x86: detect/optimize loading 0 immediates 2015-12-18 16:04:51 -05:00
oprofile x86/oprofile/nmi: Add missing hotplug FROZEN handling 2016-03-19 13:40:08 +01:00
pci PCI updates for v4.5: 2016-02-27 12:33:42 -08:00
platform Merge branch 'x86/cleanups' into x86/urgent 2016-03-17 09:44:57 +01:00
power x86/pm: Introduce quirk framework to save/restore extra MSR registers around suspend/resume 2015-11-26 10:04:53 +01:00
purgatory x86: Fix misspellings in comments 2016-02-24 08:44:58 +01:00
ras x86/ras/mce_amd_inj: Inject bank 4 errors on the NBC 2015-10-12 16:15:48 +02:00
realmode UBSAN: run-time undefined behavior sanity checker 2016-01-20 17:09:18 -08:00
tools
um Linux 4.5-rc7 2016-03-07 09:27:30 +01:00
video x86/video: Don't assume all FB devices are PCI devices 2016-03-15 11:08:26 +01:00
xen x86/iopl/64: Properly context-switch IOPL on Xen PV 2016-03-17 09:49:26 +01:00
.gitignore
Kbuild perf/x86: Move perf_event.c ............... => x86/events/core.c 2016-02-09 10:23:49 +01:00
Kconfig perf/x86/amd/power: Add AMD accumulated power reporting mechanism 2016-03-21 09:37:15 +01:00
Kconfig.cpu x86/Kconfig/cpus: Fix/complete CPU type help texts 2015-10-21 11:12:56 +02:00
Kconfig.debug Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2016-03-15 09:32:27 -07:00
Makefile Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2015-11-04 09:11:12 -08:00
Makefile_32.cpu
Makefile.um