2016-01-20 09:42+0800, Feng Wu:
> When the interrupt is not single destination any more, we need
> to change back IRTE to remapped mode explicitly.
>
> Signed-off-by: Feng Wu <feng.wu@xxxxxxxxx>
> ---
> diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
> @@ -10764,8 +10764,17 @@ static int vmx_update_pi_irte(struct kvm *kvm, unsigned int host_irq,
> - if (!kvm_intr_is_single_vcpu(kvm, &irq, &vcpu))
> + if (!kvm_intr_is_single_vcpu(kvm, &irq, &vcpu)) {
> + /*
> + * Make sure the IRTE is in remapped mode if
> + * we don't handle it in posted mode.
> + */
> + pi_set_sn(vcpu_to_pi_desc(vcpu));
What could go wrong if we didn't suppress notifications here?
Thanks.
> + ret = irq_set_vcpu_affinity(host_irq, NULL);
> + pi_clear_sn(vcpu_to_pi_desc(vcpu));
> +
> continue;
> + }
--
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