kvmhv_run_single_vcpu() disables PMIs as well as Linux irqs,
however the tick time accounting code enables and disables irqs and
not PMIs within this region. By chance this might not actually cause
a bug, but it is clearly an incorrect use of the APIs.
Fixes: 2251fbe76395e ("KVM: PPC: Book3S HV P9: Improve mtmsrd scheduling by
delaying MSR[EE] disable")
Signed-off-by: Nicholas Piggin <npig...@gmail.com>
---
arch/powerpc/kvm/book3s_hv.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c
index 014575b31651..f62dfaaf6c39 100644
--- a/arch/powerpc/kvm/book3s_hv.c
+++ b/arch/powerpc/kvm/book3s_hv.c
@@ -4620,7 +4620,7 @@ int kvmhv_run_single_vcpu(struct kvm_vcpu *vcpu, u64
time_limit,
context_tracking_guest_exit();
if (!vtime_accounting_enabled_this_cpu()) {
- local_irq_enable();
+ powerpc_local_irq_pmu_restore(flags);
/*
* Service IRQs here before vtime_account_guest_exit() so any
* ticks that occurred while running the guest are accounted to
@@ -4629,7 +4629,7 @@ int kvmhv_run_single_vcpu(struct kvm_vcpu *vcpu, u64
time_limit,
* interrupts here, which has the problem that it accounts
* interrupt processing overhead to the host.
*/
- local_irq_disable();
+ powerpc_local_irq_pmu_save(flags);
}
vtime_account_guest_exit();
--
2.37.2
