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| author | Alexandru Elisei <alexandru.elisei@arm.com> | 2020-12-01 15:01:57 +0000 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2020-12-27 14:38:25 +0000 |
| commit | 282ff80135717cc43f1e33ddd4b0cd9e760d060b (patch) | |
| tree | 16ae455915ddc8c2b9f2200f1a3c15b26fba2f2a /arch/arm64/kvm/pmu-emul.c | |
| parent | 9e5c23b9bd71d00b07720b2a8037b019d356e9df (diff) | |
| download | linux-282ff80135717cc43f1e33ddd4b0cd9e760d060b.tar.bz2 | |
KVM: arm64: Remove redundant call to kvm_pmu_vcpu_reset()
KVM_ARM_VCPU_INIT ioctl calls kvm_reset_vcpu(), which in turn resets the
PMU with a call to kvm_pmu_vcpu_reset(). The function zeroes the PMU
chained counters bitmap and stops all the counters with a perf event
attached. Because it is called before the VCPU has had the chance to run,
no perf events are in use and none are released.
kvm_arm_pmu_v3_enable(), called by kvm_vcpu_first_run_init() only if the
VCPU has been initialized, also resets the PMU. kvm_pmu_vcpu_reset() in
this case does the exact same thing as the previous call, so remove it.
Signed-off-by: Alexandru Elisei <alexandru.elisei@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20201201150157.223625-6-alexandru.elisei@arm.com
Diffstat (limited to 'arch/arm64/kvm/pmu-emul.c')
| -rw-r--r-- | arch/arm64/kvm/pmu-emul.c | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/arch/arm64/kvm/pmu-emul.c b/arch/arm64/kvm/pmu-emul.c index 398f6df1bbe4..4ad66a532e38 100644 --- a/arch/arm64/kvm/pmu-emul.c +++ b/arch/arm64/kvm/pmu-emul.c @@ -850,8 +850,6 @@ int kvm_arm_pmu_v3_enable(struct kvm_vcpu *vcpu) return -EINVAL; } - kvm_pmu_vcpu_reset(vcpu); - return 0; } |