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| author |   Sean Christopherson <seanjc@google.com> | 2024-03-06 17:13:43 -0800 |
|---|---|---|
| committer | Sean Christopherson <seanjc@google.com> | 2024-04-11 12:58:47 -0700 |
| commit | 0d0b60865071115f6da76090f0dbc1f0e8b9c647 (patch) | |
| tree | de2bb1f05c9d7ee602117c754c119ee72cec8077 /tools/perf/scripts/python/call-graph-from-postgresql.py | |
| parent | KVM: VMX: Snapshot LBR capabilities during module initialization (diff) | |
| download | wireguard-linux-0d0b60865071115f6da76090f0dbc1f0e8b9c647.tar.xz wireguard-linux-0d0b60865071115f6da76090f0dbc1f0e8b9c647.zip | |
perf/x86/intel: Expose existence of callback support to KVM
Add a "has_callstack" field to the x86_pmu_lbr structure used to pass
information to KVM, and set it accordingly in x86_perf_get_lbr(). KVM
will use has_callstack to avoid trying to create perf LBR events with
PERF_SAMPLE_BRANCH_CALL_STACK on CPUs that don't support callstacks.
Reviewed-by: Mingwei Zhang <mizhang@google.com>
Link: https://lore.kernel.org/r/20240307011344.835640-3-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
Diffstat (limited to 'tools/perf/scripts/python/call-graph-from-postgresql.py')
0 files changed, 0 insertions, 0 deletions