Commit 5add0dbb authored by Bibo Mao's avatar Bibo Mao Committed by Huacai Chen
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LoongArch: KVM: Fix PMU pass-through issue if VM exits to host finally 



In function kvm_pre_enter_guest(), it prepares to enter guest and check
whether there are pending signals or events. And it will not enter guest
if there are, PMU pass-through preparation for guest should be cancelled
and host should own PMU hardware.

Cc: stable@vger.kernel.org
Fixes: f4e40ea9 ("LoongArch: KVM: Add PMU support for guest")
Signed-off-by: default avatarBibo Mao <maobibo@loongson.cn>
Signed-off-by: default avatarHuacai Chen <chenhuacai@loongson.cn>
parent 9ea86232

arch/loongarch/kvm/vcpu.c

+1 −0
Original line number Diff line number Diff line
@@ -294,6 +294,7 @@ static int kvm_pre_enter_guest(struct kvm_vcpu *vcpu) 
		vcpu->arch.aux_inuse &= ~KVM_LARCH_SWCSR_LATEST;



		if (kvm_request_pending(vcpu) || xfer_to_guest_mode_work_pending()) {

			kvm_lose_pmu(vcpu);

			/* make sure the vcpu mode has been written */

			smp_store_mb(vcpu->mode, OUTSIDE_GUEST_MODE);

			local_irq_enable();