Commit 722625c6 authored by Fuad Tabba's avatar Fuad Tabba Committed by Marc Zyngier
Browse files

KVM: arm64: Reenable pmu in Protected Mode 



Now that the pmu code does not access hyp data, reenable it in
protected mode.

Once fully supported, protected VMs will not have pmu support,
since that could leak information. However, non-protected VMs in
protected mode should have pmu support if available.

Signed-off-by: default avatarFuad Tabba <tabba@google.com>
Reviewed-by: default avatarOliver Upton <oupton@google.com>
Signed-off-by: default avatarMarc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20220510095710.148178-5-tabba@google.com
parent 84d751a0

arch/arm64/kvm/pmu-emul.c

+1 −2
Original line number Diff line number Diff line
@@ -756,8 +756,7 @@ void kvm_host_pmu_init(struct arm_pmu *pmu) 
{

	struct arm_pmu_entry *entry;



	if (pmu->pmuver == 0 || pmu->pmuver == ID_AA64DFR0_PMUVER_IMP_DEF ||

	    is_protected_kvm_enabled())

	if (pmu->pmuver == 0 || pmu->pmuver == ID_AA64DFR0_PMUVER_IMP_DEF)

		return;



	mutex_lock(&arm_pmus_lock);