KVM: arm64: Remove redundant call to kvm_pmu_vcpu_reset()
authorAlexandru Elisei <alexandru.elisei@arm.com>
Tue, 1 Dec 2020 15:01:57 +0000 (15:01 +0000)
committerMarc Zyngier <maz@kernel.org>
Sun, 27 Dec 2020 14:38:25 +0000 (14:38 +0000)
commit282ff80135717cc43f1e33ddd4b0cd9e760d060b
tree16ae455915ddc8c2b9f2200f1a3c15b26fba2f2a
parent9e5c23b9bd71d00b07720b2a8037b019d356e9df
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
arch/arm64/kvm/pmu-emul.c