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| author |   Peter Zijlstra <peterz@infradead.org> | 2022-09-29 12:20:50 +0200 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2022-09-29 12:20:50 +0200 |
| commit | a1ebcd59430236b336428bbf8e1da16fb87d56e4 (patch) | |
| tree | 126b999f1eae9b7ecf1045eec425a6dbcdcb4351 /arch/x86/events/intel/lbr.c | |
| parent | bpf: Check flags for branch stack in bpf_read_branch_records helper (diff) | |
| parent | Linux 6.0-rc7 (diff) | |
| download | linux-dev-a1ebcd59430236b336428bbf8e1da16fb87d56e4.tar.xz linux-dev-a1ebcd59430236b336428bbf8e1da16fb87d56e4.zip | |
Merge branch 'v6.0-rc7'
Merge upstream to get RAPTORLAKE_S
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Diffstat (limited to 'arch/x86/events/intel/lbr.c')
| -rw-r--r-- | arch/x86/events/intel/lbr.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/x86/events/intel/lbr.c b/arch/x86/events/intel/lbr.c index 7dffc0c731a6..4fce1a4226e3 100644 --- a/arch/x86/events/intel/lbr.c +++ b/arch/x86/events/intel/lbr.c @@ -1037,6 +1037,14 @@ static int intel_pmu_setup_hw_lbr_filter(struct perf_event *event) if (static_cpu_has(X86_FEATURE_ARCH_LBR)) { reg->config = mask; + + /* + * The Arch LBR HW can retrieve the common branch types + * from the LBR_INFO. It doesn't require the high overhead + * SW disassemble. + * Enable the branch type by default for the Arch LBR. + */ + reg->reg |= X86_BR_TYPE_SAVE; return 0; } |