On 03/06/2015 01:51, Steve Rutherford wrote:
> +static inline void kvm_arch_irq_routing_update(struct kvm *kvm)
> +{
> +}
Please add the static inline to all arches instead of putting it in
#ifndef __KVM_HAVE_IOAPIC. It's not related to the existence of an ioapic.
>
> +void kvm_arch_irq_routing_update(struct kvm *kvm)
> +{
> + struct kvm_ioapic *ioapic = kvm->arch.vioapic;
> +
> + if (ioapic)
> + return;
> + if (!lapic_in_kernel(kvm))
> + return;
> + kvm_make_scan_ioapic_request(kvm);
> +}
> +
It's weird to have a function in ioapic.c that only does something if
you _do not_ have an ioapic. :)
> +
> +void kvm_scan_ioapic_routes(struct kvm_vcpu *vcpu, u64 *eoi_exit_bitmap)
This must stay in arch/x86/kvm/. I'd put both of these in irq_comm.c.
Then you do not need kvm_arch_nr_userspace_ioapic_pins anymore.
Paolo
> +{
> + struct kvm *kvm = vcpu->kvm;
> + struct kvm_kernel_irq_routing_entry *entry;
> + struct kvm_irq_routing_table *table;
> + u32 i, nr_ioapic_pins;
> + int idx;
> +
> + /* kvm->irq_routing must be read after clearing
> + * KVM_SCAN_IOAPIC. */
> + smp_mb();
> + idx = srcu_read_lock(&kvm->irq_srcu);
> + table = kvm->irq_routing;
> + nr_ioapic_pins = min_t(u32, table->nr_rt_entries,
> + kvm_arch_nr_userspace_ioapic_pins(kvm));
> + for (i = 0; i < nr_ioapic_pins; ++i) {
> + hlist_for_each_entry(entry, &table->map[i], link) {
> + u32 dest_id, dest_mode;
> +
> + if (entry->type != KVM_IRQ_ROUTING_MSI)
> + continue;
> + dest_id = (entry->msi.address_lo >> 12) & 0xff;
> + dest_mode = (entry->msi.address_lo >> 2) & 0x1;
> + if (kvm_apic_match_dest(vcpu, NULL, 0, dest_id,
> + dest_mode)) {
> + u32 vector = entry->msi.data & 0xff;
> +
> + __set_bit(vector,
> + (unsigned long *) eoi_exit_bitmap);
> + }
> + }
> + }
> + srcu_read_unlock(&kvm->irq_srcu, idx);
> +}
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