2015-12-16 09:37+0800, Feng Wu:
> Use vector-hashing to deliver lowest-priority interrupts for
> VT-d posted-interrupts.
>
> Signed-off-by: Feng Wu <feng.wu@xxxxxxxxx>
> ---
> diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
> @@ -10702,8 +10702,16 @@ static int vmx_update_pi_irte(struct kvm *kvm, unsigned int host_irq,
> */
>
> kvm_set_msi_irq(e, &irq);
> - if (!kvm_intr_is_single_vcpu(kvm, &irq, &vcpu))
> - continue;
> +
> + if (!kvm_intr_is_single_vcpu(kvm, &irq, &vcpu)) {
> + if (!kvm_vector_hashing_enabled() ||
> + irq.delivery_mode != APIC_DM_LOWEST)
Hm, wouldn't it actually be easier to extend kvm_intr_is_single_vcpu()
with vector hashing? :)
> + continue;
> +
> + vcpu = kvm_intr_vector_hashing_dest(kvm, &irq);
> + if (!vcpu)
> + continue;
> + }
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