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| author |   Olof Johansson <olof@lixom.net> | 2012-09-11 23:22:25 -0700 |
|---|---|---|
| committer | Olof Johansson <olof@lixom.net> | 2012-09-11 23:22:25 -0700 |
| commit | f46e374c1ea7fafce70a838f09fbd67de3e4d49f (patch) | |
| tree | e191e5316bdb8558bd3e2b0981c715bedd225ca7 /arch/x86/kernel/cpu/perf_event_intel.c | |
| parent | Merge branch 'ks8695/boards' into next/boards (diff) | |
| parent | ARM: shmobile: marzen: enable thermal sensor (diff) | |
| download | linux-dev-f46e374c1ea7fafce70a838f09fbd67de3e4d49f.tar.xz linux-dev-f46e374c1ea7fafce70a838f09fbd67de3e4d49f.zip | |
Merge branch 'boards' of git://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas into next/boards
* 'boards' of git://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas:
ARM: shmobile: marzen: enable thermal sensor
ARM: shmobile: marzen: fixup regulator id for smsc911x
ARM: shmobile: marzen: add SDHI0 support
+ sync to 3.6-rc4
Diffstat (limited to 'arch/x86/kernel/cpu/perf_event_intel.c')
| -rw-r--r-- | arch/x86/kernel/cpu/perf_event_intel.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/arch/x86/kernel/cpu/perf_event_intel.c b/arch/x86/kernel/cpu/perf_event_intel.c index 382366977d4c..7f2739e03e79 100644 --- a/arch/x86/kernel/cpu/perf_event_intel.c +++ b/arch/x86/kernel/cpu/perf_event_intel.c @@ -1522,8 +1522,16 @@ static struct perf_guest_switch_msr *intel_guest_get_msrs(int *nr) arr[0].msr = MSR_CORE_PERF_GLOBAL_CTRL; arr[0].host = x86_pmu.intel_ctrl & ~cpuc->intel_ctrl_guest_mask; arr[0].guest = x86_pmu.intel_ctrl & ~cpuc->intel_ctrl_host_mask; + /* + * If PMU counter has PEBS enabled it is not enough to disable counter + * on a guest entry since PEBS memory write can overshoot guest entry + * and corrupt guest memory. Disabling PEBS solves the problem. + */ + arr[1].msr = MSR_IA32_PEBS_ENABLE; + arr[1].host = cpuc->pebs_enabled; + arr[1].guest = 0; - *nr = 1; + *nr = 2; return arr; } |