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| author | Andrew Murray <andrew.murray@arm.com> | 2019-04-29 22:13:05 +0300 |
|---|---|---|
| committer | Marc Zyngier <marc.zyngier@arm.com> | 2019-04-30 12:11:49 +0300 |
| commit | 21137301de5a5bd8be7b0de7896c3f139b7eb859 (patch) | |
| tree | 37667a28e37a410b6256834482b5ccda8b4ed365 /Documentation | |
| parent | a9bf3130ebfe0378df449a1b13997c47a58e661a (diff) | |
| download | linux-21137301de5a5bd8be7b0de7896c3f139b7eb859.tar.xz | |
arm64: KVM: Fix perf cycle counter support for VHE
The kvm_vcpu_pmu_{read,write}_evtype_direct functions do not handle
the cycle counter use-case, this leads to inaccurate counts and a
WARN message when using perf with the cycle counter (-e cycle).
Let's fix this by adding a use case for pmccfiltr_el0.
Fixes: 39e3406a090a ("arm64: KVM: Avoid isb's by using direct pmxevtyper sysreg")
Reported-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Andrew Murray <andrew.murray@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Diffstat (limited to 'Documentation')
0 files changed, 0 insertions, 0 deletions