diff options
| author | Kan Liang <kan.liang@linux.intel.com> | 2020-07-03 05:49:10 -0700 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2020-07-08 11:38:52 +0200 |
| commit | 799571bf38fc2b4b744fa448184b5915739b10fd (patch) | |
| tree | 9d9a11c263b6d232cc5f1f4d2b40be6718ae349b /arch/x86/events/intel/core.c | |
| parent | c301b1d80ed5b806834fe0f739f028f65fb4fb16 (diff) | |
perf/x86/intel/lbr: Add the function pointers for LBR save and restore
The MSRs of Architectural LBR are different from previous model-specific
LBR. Perf has to implement different functions to save and restore them.
The function pointers for LBR save and restore are introduced. Perf
should initialize the corresponding functions at boot time.
The generic optimizations, e.g. avoiding restore LBR if no one else
touched them, still apply for Architectural LBRs. The related codes are
not moved to model-specific functions.
Current model-specific LBR functions are set as default.
Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/1593780569-62993-5-git-send-email-kan.liang@linux.intel.com
Diffstat (limited to 'arch/x86/events/intel/core.c')
| -rw-r--r-- | arch/x86/events/intel/core.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/x86/events/intel/core.c b/arch/x86/events/intel/core.c index 6414b4799ce7..50cb3c69d6a4 100644 --- a/arch/x86/events/intel/core.c +++ b/arch/x86/events/intel/core.c @@ -3981,6 +3981,8 @@ static __initconst const struct x86_pmu core_pmu = { .lbr_reset = intel_pmu_lbr_reset_64, .lbr_read = intel_pmu_lbr_read_64, + .lbr_save = intel_pmu_lbr_save, + .lbr_restore = intel_pmu_lbr_restore, }; static __initconst const struct x86_pmu intel_pmu = { @@ -4029,6 +4031,8 @@ static __initconst const struct x86_pmu intel_pmu = { .lbr_reset = intel_pmu_lbr_reset_64, .lbr_read = intel_pmu_lbr_read_64, + .lbr_save = intel_pmu_lbr_save, + .lbr_restore = intel_pmu_lbr_restore, }; static __init void intel_clovertown_quirk(void) |