diff options
| author | Like Xu <[email protected]> | 2022-04-11 18:19:38 +0800 |
|---|---|---|
| committer | Paolo Bonzini <[email protected]> | 2022-06-08 04:48:00 -0400 |
| commit | 6ebe44366bdeaf3059f2b644bbd99824ae824228 (patch) | |
| tree | 52f44a3c6b9d6892b9dc56c12a5ea233f1820771 /tools/perf/scripts/python/export-to-sqlite.py | |
| parent | 79f3e3b58386a2fc05054367b905619f741beeb4 (diff) | |
KVM: x86/pmu: Adjust precise_ip to emulate Ice Lake guest PDIR counter
The PEBS-PDIR facility on Ice Lake server is supported on IA31_FIXED0 only.
If the guest configures counter 32 and PEBS is enabled, the PEBS-PDIR
facility is supposed to be used, in which case KVM adjusts attr.precise_ip
to 3 and request host perf to assign the exactly requested counter or fail.
The CPU model check is also required since some platforms may place the
PEBS-PDIR facility in another counter index.
Signed-off-by: Like Xu <[email protected]>
Acked-by: Peter Zijlstra (Intel) <[email protected]>
Message-Id: <[email protected]>
Signed-off-by: Paolo Bonzini <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/export-to-sqlite.py')
0 files changed, 0 insertions, 0 deletions