Commit 359a6c3d authored by Paolo Bonzini's avatar Paolo Bonzini

KVM: nVMX: do not start the preemption timer hrtimer unnecessarily

The preemption timer can be started even if there is a vmentry
failure during or after loading guest state.  That is pointless,
move the call after all conditions have been checked.
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent d9293597
...@@ -2278,10 +2278,6 @@ static int prepare_vmcs02(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12, ...@@ -2278,10 +2278,6 @@ static int prepare_vmcs02(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12,
} }
vmx_set_rflags(vcpu, vmcs12->guest_rflags); vmx_set_rflags(vcpu, vmcs12->guest_rflags);
vmx->nested.preemption_timer_expired = false;
if (nested_cpu_has_preemption_timer(vmcs12))
vmx_start_preemption_timer(vcpu);
/* EXCEPTION_BITMAP and CR0_GUEST_HOST_MASK should basically be the /* EXCEPTION_BITMAP and CR0_GUEST_HOST_MASK should basically be the
* bitwise-or of what L1 wants to trap for L2, and what we want to * bitwise-or of what L1 wants to trap for L2, and what we want to
* trap. Note that CR0.TS also needs updating - we do this later. * trap. Note that CR0.TS also needs updating - we do this later.
...@@ -3018,6 +3014,15 @@ int nested_vmx_enter_non_root_mode(struct kvm_vcpu *vcpu, bool from_vmentry) ...@@ -3018,6 +3014,15 @@ int nested_vmx_enter_non_root_mode(struct kvm_vcpu *vcpu, bool from_vmentry)
if (unlikely(evaluate_pending_interrupts)) if (unlikely(evaluate_pending_interrupts))
kvm_make_request(KVM_REQ_EVENT, vcpu); kvm_make_request(KVM_REQ_EVENT, vcpu);
/*
* Do not start the preemption timer hrtimer until after we know
* we are successful, so that only nested_vmx_vmexit needs to cancel
* the timer.
*/
vmx->nested.preemption_timer_expired = false;
if (nested_cpu_has_preemption_timer(vmcs12))
vmx_start_preemption_timer(vcpu);
/* /*
* Note no nested_vmx_succeed or nested_vmx_fail here. At this point * Note no nested_vmx_succeed or nested_vmx_fail here. At this point
* we are no longer running L1, and VMLAUNCH/VMRESUME has not yet * we are no longer running L1, and VMLAUNCH/VMRESUME has not yet
......
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