On 16/09/2015 10:50, Feng Wu wrote:
> Currently, we don't support urgent interrupt, all interrupts
> are recognized as non-urgent interrupt, so we cannot post
> interrupts when 'SN' is set.
>
> If the vcpu is in guest mode, it cannot have been scheduled out,
> and that's the only case when SN is set currently, warning if
> SN is set.
>
> Signed-off-by: Feng Wu <feng.wu@xxxxxxxxx>
> Reviewed-by: Paolo Bonzini <pbonzini@xxxxxxxxxx>
Please fold this into patch 10.
Paolo
> ---
> arch/x86/kvm/vmx.c | 16 ++++++++++++++++
> 1 file changed, 16 insertions(+)
>
> diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
> index 9888c43..58fbbc6 100644
> --- a/arch/x86/kvm/vmx.c
> +++ b/arch/x86/kvm/vmx.c
> @@ -4498,6 +4498,22 @@ static inline bool kvm_vcpu_trigger_posted_interrupt(struct kvm_vcpu *vcpu)
> {
> #ifdef CONFIG_SMP
> if (vcpu->mode == IN_GUEST_MODE) {
> + struct vcpu_vmx *vmx = to_vmx(vcpu);
> +
> + /*
> + * Currently, we don't support urgent interrupt,
> + * all interrupts are recognized as non-urgent
> + * interrupt, so we cannot post interrupts when
> + * 'SN' is set.
> + *
> + * If the vcpu is in guest mode, it means it is
> + * running instead of being scheduled out and
> + * waiting in the run queue, and that's the only
> + * case when 'SN' is set currently, warning if
> + * 'SN' is set.
> + */
> + WARN_ON_ONCE(pi_test_sn(&vmx->pi_desc));
> +
> apic->send_IPI_mask(get_cpu_mask(vcpu->cpu),
> POSTED_INTR_VECTOR);
> return true;
>
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