#include <linux/kvm_host.h>
#include <asm/msidef.h>
+#ifdef CONFIG_IA64
+#include <asm/iosapic.h>
+#endif
#include "irq.h"
return kvm_ioapic_set_irq(kvm->arch.vioapic, e->irqchip.pin, level);
}
-void kvm_get_intr_delivery_bitmask(struct kvm_ioapic *ioapic,
- union kvm_ioapic_redirect_entry *entry,
- unsigned long *deliver_bitmask)
+inline static bool kvm_is_dm_lowest_prio(struct kvm_lapic_irq *irq)
{
- int i;
- struct kvm *kvm = ioapic->kvm;
- struct kvm_vcpu *vcpu;
-
- bitmap_zero(deliver_bitmask, KVM_MAX_VCPUS);
-
- if (entry->fields.dest_mode == 0) { /* Physical mode. */
- if (entry->fields.dest_id == 0xFF) { /* Broadcast. */
- for (i = 0; i < KVM_MAX_VCPUS; ++i)
- if (kvm->vcpus[i] && kvm->vcpus[i]->arch.apic)
- __set_bit(i, deliver_bitmask);
- /* Lowest priority shouldn't combine with broadcast */
- if (entry->fields.delivery_mode ==
- IOAPIC_LOWEST_PRIORITY && printk_ratelimit())
- printk(KERN_INFO "kvm: apic: phys broadcast "
- "and lowest prio\n");
- return;
- }
- for (i = 0; i < KVM_MAX_VCPUS; ++i) {
- vcpu = kvm->vcpus[i];
- if (!vcpu)
- continue;
- if (kvm_apic_match_physical_addr(vcpu->arch.apic,
- entry->fields.dest_id)) {
- if (vcpu->arch.apic)
- __set_bit(i, deliver_bitmask);
- break;
- }
- }
- } else if (entry->fields.dest_id != 0) /* Logical mode, MDA non-zero. */
- for (i = 0; i < KVM_MAX_VCPUS; ++i) {
- vcpu = kvm->vcpus[i];
- if (!vcpu)
- continue;
- if (vcpu->arch.apic &&
- kvm_apic_match_logical_addr(vcpu->arch.apic,
- entry->fields.dest_id))
- __set_bit(i, deliver_bitmask);
- }
-
- switch (entry->fields.delivery_mode) {
- case IOAPIC_LOWEST_PRIORITY:
- /* Select one in deliver_bitmask */
- vcpu = kvm_get_lowest_prio_vcpu(ioapic->kvm,
- entry->fields.vector, deliver_bitmask);
- bitmap_zero(deliver_bitmask, KVM_MAX_VCPUS);
- if (!vcpu)
- return;
- __set_bit(vcpu->vcpu_id, deliver_bitmask);
- break;
- case IOAPIC_FIXED:
- case IOAPIC_NMI:
- break;
- default:
- if (printk_ratelimit())
- printk(KERN_INFO "kvm: unsupported delivery mode %d\n",
- entry->fields.delivery_mode);
- bitmap_zero(deliver_bitmask, KVM_MAX_VCPUS);
- }
+#ifdef CONFIG_IA64
+ return irq->delivery_mode ==
+ (IOSAPIC_LOWEST_PRIORITY << IOSAPIC_DELIVERY_SHIFT);
+#else
+ return irq->delivery_mode == APIC_DM_LOWEST;
+#endif
}
-static int kvm_set_msi(struct kvm_kernel_irq_routing_entry *e,
- struct kvm *kvm, int level)
+int kvm_irq_delivery_to_apic(struct kvm *kvm, struct kvm_lapic *src,
+ struct kvm_lapic_irq *irq)
{
- int vcpu_id, r = -1;
- struct kvm_vcpu *vcpu;
- struct kvm_ioapic *ioapic = ioapic_irqchip(kvm);
- union kvm_ioapic_redirect_entry entry;
- DECLARE_BITMAP(deliver_bitmask, KVM_MAX_VCPUS);
+ int i, r = -1;
+ struct kvm_vcpu *vcpu, *lowest = NULL;
- BUG_ON(!ioapic);
+ if (irq->dest_mode == 0 && irq->dest_id == 0xff &&
+ kvm_is_dm_lowest_prio(irq))
+ printk(KERN_INFO "kvm: apic: phys broadcast and lowest prio\n");
- entry.bits = 0;
- entry.fields.dest_id = (e->msi.address_lo &
- MSI_ADDR_DEST_ID_MASK) >> MSI_ADDR_DEST_ID_SHIFT;
- entry.fields.vector = (e->msi.data &
- MSI_DATA_VECTOR_MASK) >> MSI_DATA_VECTOR_SHIFT;
- entry.fields.dest_mode = test_bit(MSI_ADDR_DEST_MODE_SHIFT,
- (unsigned long *)&e->msi.address_lo);
- entry.fields.trig_mode = test_bit(MSI_DATA_TRIGGER_SHIFT,
- (unsigned long *)&e->msi.data);
- entry.fields.delivery_mode = test_bit(
- MSI_DATA_DELIVERY_MODE_SHIFT,
- (unsigned long *)&e->msi.data);
+ for (i = 0; i < KVM_MAX_VCPUS; i++) {
+ vcpu = kvm->vcpus[i];
- /* TODO Deal with RH bit of MSI message address */
+ if (!vcpu || !kvm_apic_present(vcpu))
+ continue;
- kvm_get_intr_delivery_bitmask(ioapic, &entry, deliver_bitmask);
+ if (!kvm_apic_match_dest(vcpu, src, irq->shorthand,
+ irq->dest_id, irq->dest_mode))
+ continue;
- if (find_first_bit(deliver_bitmask, KVM_MAX_VCPUS) >= KVM_MAX_VCPUS) {
- printk(KERN_WARNING "kvm: no destination for MSI delivery!");
- return -1;
- }
- while ((vcpu_id = find_first_bit(deliver_bitmask,
- KVM_MAX_VCPUS)) < KVM_MAX_VCPUS) {
- __clear_bit(vcpu_id, deliver_bitmask);
- vcpu = ioapic->kvm->vcpus[vcpu_id];
- if (vcpu) {
+ if (!kvm_is_dm_lowest_prio(irq)) {
if (r < 0)
r = 0;
- r += kvm_apic_set_irq(vcpu, entry.fields.vector,
- entry.fields.trig_mode);
+ r += kvm_apic_set_irq(vcpu, irq);
+ } else {
+ if (!lowest)
+ lowest = vcpu;
+ else if (kvm_apic_compare_prio(vcpu, lowest) < 0)
+ lowest = vcpu;
}
}
+
+ if (lowest)
+ r = kvm_apic_set_irq(lowest, irq);
+
return r;
}
+static int kvm_set_msi(struct kvm_kernel_irq_routing_entry *e,
+ struct kvm *kvm, int level)
+{
+ struct kvm_lapic_irq irq;
+
+ irq.dest_id = (e->msi.address_lo &
+ MSI_ADDR_DEST_ID_MASK) >> MSI_ADDR_DEST_ID_SHIFT;
+ irq.vector = (e->msi.data &
+ MSI_DATA_VECTOR_MASK) >> MSI_DATA_VECTOR_SHIFT;
+ irq.dest_mode = (1 << MSI_ADDR_DEST_MODE_SHIFT) & e->msi.address_lo;
+ irq.trig_mode = (1 << MSI_DATA_TRIGGER_SHIFT) & e->msi.data;
+ irq.delivery_mode = e->msi.data & 0x700;
+ irq.level = 1;
+ irq.shorthand = 0;
+
+ /* TODO Deal with RH bit of MSI message address */
+ return kvm_irq_delivery_to_apic(kvm, NULL, &irq);
+}
+
/* This should be called with the kvm->lock mutex held
* Return value:
* < 0 Interrupt was ignored (masked or not delivered for other reasons)
delta = 8;
break;
case KVM_IRQCHIP_IOAPIC:
- e->set = kvm_set_ioapic_irq;
+ e->set = kvm_set_ioapic_irq;
break;
default:
goto out;
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff