https://github.com/torvalds/linux
Revision c9b08884c9c98929ec2d8abafd78e89062d01ee7 authored by Peter Zijlstra on 03 February 2014, 13:29:03 UTC, committed by Thomas Gleixner on 21 February 2014, 21:09:01 UTC
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>
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Tip revision: c9b08884c9c98929ec2d8abafd78e89062d01ee7 authored by Peter Zijlstra on 03 February 2014, 13:29:03 UTC
perf/x86: Correctly use FEATURE_PDCM
perf/x86: Correctly use FEATURE_PDCM
Tip revision: c9b0888
File | Mode | Size |
---|---|---|
partitions | ||
Kconfig | -rw-r--r-- | 3.6 KB |
Kconfig.iosched | -rw-r--r-- | 1.6 KB |
Makefile | -rw-r--r-- | 844 bytes |
blk-cgroup.c | -rw-r--r-- | 28.8 KB |
blk-cgroup.h | -rw-r--r-- | 16.7 KB |
blk-core.c | -rw-r--r-- | 87.2 KB |
blk-exec.c | -rw-r--r-- | 3.2 KB |
blk-flush.c | -rw-r--r-- | 15.7 KB |
blk-integrity.c | -rw-r--r-- | 11.6 KB |
blk-ioc.c | -rw-r--r-- | 10.2 KB |
blk-iopoll.c | -rw-r--r-- | 5.9 KB |
blk-lib.c | -rw-r--r-- | 7.0 KB |
blk-map.c | -rw-r--r-- | 8.2 KB |
blk-merge.c | -rw-r--r-- | 13.1 KB |
blk-mq-cpu.c | -rw-r--r-- | 2.2 KB |
blk-mq-cpumap.c | -rw-r--r-- | 2.3 KB |
blk-mq-sysfs.c | -rw-r--r-- | 9.5 KB |
blk-mq-tag.c | -rw-r--r-- | 4.6 KB |
blk-mq-tag.h | -rw-r--r-- | 894 bytes |
blk-mq.c | -rw-r--r-- | 33.8 KB |
blk-mq.h | -rw-r--r-- | 1.4 KB |
blk-settings.c | -rw-r--r-- | 26.3 KB |
blk-softirq.c | -rw-r--r-- | 4.4 KB |
blk-sysfs.c | -rw-r--r-- | 16.0 KB |
blk-tag.c | -rw-r--r-- | 9.8 KB |
blk-throttle.c | -rw-r--r-- | 46.0 KB |
blk-timeout.c | -rw-r--r-- | 5.2 KB |
blk.h | -rw-r--r-- | 7.8 KB |
bsg-lib.c | -rw-r--r-- | 6.0 KB |
bsg.c | -rw-r--r-- | 23.6 KB |
cfq-iosched.c | -rw-r--r-- | 120.5 KB |
cmdline-parser.c | -rw-r--r-- | 4.8 KB |
compat_ioctl.c | -rw-r--r-- | 20.8 KB |
deadline-iosched.c | -rw-r--r-- | 11.3 KB |
elevator.c | -rw-r--r-- | 24.1 KB |
genhd.c | -rw-r--r-- | 44.1 KB |
ioctl.c | -rw-r--r-- | 10.7 KB |
noop-iosched.c | -rw-r--r-- | 2.7 KB |
partition-generic.c | -rw-r--r-- | 14.0 KB |
scsi_ioctl.c | -rw-r--r-- | 19.2 KB |
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