On 25/08/2015 10:50, Feng Wu wrote:
> +int kvm_arch_update_pi_irte(struct kvm *kvm, unsigned int host_irq,
> + uint32_t guest_irq, bool set)
Please move all of this code to a vmx.c callback instead of adding
get_pi_desc_addr. Check if this makes the pi_set_sn and pi_clear_sn
callbacks superfluous.
Paolo
> + if (!irq_remapping_cap(IRQ_POSTING_CAP))
> + return 0;
> + idx = srcu_read_lock(&kvm->irq_srcu);
> + irq_rt = srcu_dereference(kvm->irq_routing, &kvm->irq_srcu);
> + BUG_ON(guest_irq >= irq_rt->nr_rt_entries);
> +
> + hlist_for_each_entry(e, &irq_rt->map[guest_irq], link) {
> + if (e->type != KVM_IRQ_ROUTING_MSI)
> + continue;
> + /*
> + * VT-d PI cannot support posting multicast/broadcast
> + * interrupts to a VCPU, we still use interrupt remapping
> + * for these kind of interrupts.
> + *
> + * For lowest-priority interrupts, we only support
> + * those with single CPU as the destination, e.g. user
> + * configures the interrupts via /proc/irq or uses
> + * irqbalance to make the interrupts single-CPU.
> + *
> + * We will support full lowest-priority interrupt later.
> + *
> + */
> +
> + kvm_set_msi_irq(e, &irq);
> + if (!kvm_intr_is_single_vcpu(kvm, &irq, &vcpu))
> + continue;
> +
> + vcpu_info.pi_desc_addr = kvm_x86_ops->get_pi_desc_addr(vcpu);
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