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UPSTREAM: KVM: arm64: Gate kvm_pmu_update_state() on the PMU feature

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We currently gate the update of the PMU state on the PMU being "ready".
The "ready" state is only set to true when the first vcpu run is
successful, and if it isn't, we never reach the update code.

So the "ready" state is never the right thing to check for, and it
should instead be the presence of the PMU feature, which makes
a bit more sense.

Reviewed-by: Alexandru Elisei <alexandru.elisei@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
(cherry picked from commit 46acf89de4)
Signed-off-by: Will Deacon <willdeacon@google.com>
Change-Id: If51c248249d72b1256339c864a3eff0b1681e9f2
Bug: 178098380
Test: atest VirtualizationHostTestCases on an EL2-enabled device
This commit is contained in:
Marc Zyngier 2020-11-13 16:41:40 +00:00 committed by Will Deacon
parent dc736eef6d
commit 67bd9502ae
1 changed files with 1 additions and 1 deletions
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2
arch/arm64/kvm/pmu-emul.c
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@ -384,7 +384,7 @@ static void kvm_pmu_update_state(struct kvm_vcpu *vcpu)
struct kvm_pmu *pmu = &vcpu->arch.pmu;
bool overflow;
if (!kvm_arm_pmu_v3_ready(vcpu))
if (!kvm_vcpu_has_pmu(vcpu))
return;
overflow = !!kvm_pmu_overflow_status(vcpu);