diff options
| author | Bibo Mao <maobibo@loongson.cn> | 2025-04-24 20:15:52 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-05-02 07:59:08 +0200 |
| commit | 74d9e2018789f95ea4e659b57ade15227daad36a (patch) | |
| tree | 54485b868d6282a8f837903879f67d3c7140e9a4 | |
| parent | be83fd71ac6e423d9c2d36ca67e0f5279314d2ea (diff) | |
LoongArch: KVM: Fix PMU pass-through issue if VM exits to host finally
commit 5add0dbbebd60628b55e5eb8426612dedab7311a upstream.
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: f4e40ea9f78f ("LoongArch: KVM: Add PMU support for guest")
Signed-off-by: Bibo Mao <maobibo@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | arch/loongarch/kvm/vcpu.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/loongarch/kvm/vcpu.c b/arch/loongarch/kvm/vcpu.c index 79e8d3584da7..4b0ae29b8aca 100644 --- a/arch/loongarch/kvm/vcpu.c +++ b/arch/loongarch/kvm/vcpu.c @@ -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(); |