leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity
c9b08884c9
linux/arch
History
Peter Zijlstra c9b08884c9 perf/x86: Correctly use FEATURE_PDCM 
The current code simply assumes Intel Arch PerfMon v2+ to have
the IA32_PERF_CAPABILITIES MSR; the SDM specifies that we should check
CPUID[1].ECX[15] (aka, FEATURE_PDCM) instead.

This was found by KVM which implements v2+ but didn't provide the
capabilities MSR. Change the code to DTRT; KVM will also implement the
MSR and return 0.

Cc: pbonzini@redhat.com
Reported-by: "Michael S. Tsirkin" <mst@redhat.com>
Suggested-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20140203132903.GI8874@twins.programming.kicks-ass.net
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2014-02-21 22:09:01 +01:00
..
alpha arch: Clean up asm/barrier.h implementations using asm-generic/barrier.h 2014-01-12 10:37:15 +01:00
arc arch: Re-sort some Kbuild files to hopefully help avoid some conflicts 2014-01-13 21:56:54 -08:00
arm Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-01-20 11:34:26 -08:00
arm64 Merge branch 'core-locking-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-01-20 10:23:08 -08:00
avr32 arch: Clean up asm/barrier.h implementations using asm-generic/barrier.h 2014-01-12 10:37:15 +01:00
blackfin arch: Clean up asm/barrier.h implementations using asm-generic/barrier.h 2014-01-12 10:37:15 +01:00
c6x Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2013-11-19 10:40:00 -08:00
cris arch: Re-sort some Kbuild files to hopefully help avoid some conflicts 2014-01-13 21:56:54 -08:00
frv arch: Clean up asm/barrier.h implementations using asm-generic/barrier.h 2014-01-12 10:37:15 +01:00
hexagon arch: Re-sort some Kbuild files to hopefully help avoid some conflicts 2014-01-13 21:56:54 -08:00
ia64 Merge branch 'core-locking-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-01-20 10:23:08 -08:00
m32r arch: Clean up asm/barrier.h implementations using asm-generic/barrier.h 2014-01-12 10:37:15 +01:00
m68k Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-01-20 10:42:08 -08:00
metag Merge branch 'core-locking-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-01-20 10:23:08 -08:00
microblaze arch: Re-sort some Kbuild files to hopefully help avoid some conflicts 2014-01-13 21:56:54 -08:00
mips Merge branch 'core-stackprotector-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-01-20 10:26:31 -08:00
mn10300 arch: Re-sort some Kbuild files to hopefully help avoid some conflicts 2014-01-13 21:56:54 -08:00
openrisc OpenRISC updates for 3.13 2013-11-15 14:26:38 -08:00
parisc Merge branch 'core-locking-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-01-20 10:23:08 -08:00
powerpc Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-01-20 10:28:30 -08:00
s390 Merge branch 'core-locking-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-01-20 10:23:08 -08:00
score arch: Re-sort some Kbuild files to hopefully help avoid some conflicts 2014-01-13 21:56:54 -08:00
sh Merge branch 'core-stackprotector-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-01-20 10:26:31 -08:00
sparc Merge branch 'core-locking-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-01-20 10:23:08 -08:00
tile arch: Clean up asm/barrier.h implementations using asm-generic/barrier.h 2014-01-12 10:37:15 +01:00
um um: Build always with -mcmodel=large on 64bit 2013-12-01 13:06:51 +01:00
unicore32 arch: Clean up asm/barrier.h implementations using asm-generic/barrier.h 2014-01-12 10:37:15 +01:00
x86 perf/x86: Correctly use FEATURE_PDCM 2014-02-21 22:09:01 +01:00
xtensa arch: Clean up asm/barrier.h implementations using asm-generic/barrier.h 2014-01-12 10:37:15 +01:00
.gitignore
Kconfig stackprotector: Introduce CONFIG_CC_STACKPROTECTOR_STRONG 2013-12-20 09:38:40 +01:00