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| author | David S. Miller <davem@davemloft.net> | 2013-03-20 12:46:26 -0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-03-20 12:46:26 -0400 |
| commit | 61816596d1c9026d0ecb20c44f90452c41596ffe (patch) | |
| tree | 3027ed6dc62f71e14b9d525405747fa0eb8f074d /arch/x86/kernel/cpu/perf_event_intel_ds.c | |
| parent | 23a9072e3af0d9538e25837fb2b56bb94e4a8e67 (diff) | |
| parent | da2191e31409d1058dcbed44e8f53e39a40e86b3 (diff) | |
| download | linux-61816596d1c9026d0ecb20c44f90452c41596ffe.tar.bz2 | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Pull in the 'net' tree to get Daniel Borkmann's flow dissector
infrastructure change.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/x86/kernel/cpu/perf_event_intel_ds.c')
| -rw-r--r-- | arch/x86/kernel/cpu/perf_event_intel_ds.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/x86/kernel/cpu/perf_event_intel_ds.c b/arch/x86/kernel/cpu/perf_event_intel_ds.c index 826054a4f2ee..b05a575d56f4 100644 --- a/arch/x86/kernel/cpu/perf_event_intel_ds.c +++ b/arch/x86/kernel/cpu/perf_event_intel_ds.c @@ -729,3 +729,13 @@ void intel_ds_init(void) } } } + +void perf_restore_debug_store(void) +{ + struct debug_store *ds = __this_cpu_read(cpu_hw_events.ds); + + if (!x86_pmu.bts && !x86_pmu.pebs) + return; + + wrmsrl(MSR_IA32_DS_AREA, (unsigned long)ds); +} |