Signed-off-by: Sheng Yang <sh...@linux.intel.com>
---
include/linux/kvm_host.h | 3 ++
virt/kvm/ioapic.c | 84 +++++++++++++++++-----------------------------
virt/kvm/irq_comm.c | 75 ++++++++++++++++++++++++----------------
3 files changed, 79 insertions(+), 83 deletions(-)
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index 5b671b6..4f92317 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -330,6 +330,9 @@ struct kvm_gsi_msg {
struct hlist_node link;
};
+void kvm_get_intr_delivery_bitmask(struct kvm_ioapic *ioapic,
+ union kvm_ioapic_redirect_entry *entry,
+ u32 *deliver_bitmask);
void kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 gsi, int level);
void kvm_notify_acked_irq(struct kvm *kvm, unsigned gsi);
void kvm_register_irq_ack_notifier(struct kvm *kvm,
diff --git a/virt/kvm/ioapic.c b/virt/kvm/ioapic.c
index ebb2ab5..af9f5de 100644
--- a/virt/kvm/ioapic.c
+++ b/virt/kvm/ioapic.c
@@ -195,75 +195,53 @@ u32 kvm_ioapic_get_delivery_bitmask(struct kvm_ioapic
*ioapic, u8 dest,
static int ioapic_deliver(struct kvm_ioapic *ioapic, int irq)
{
- u8 dest = ioapic->redirtbl[irq].fields.dest_id;
- u8 dest_mode = ioapic->redirtbl[irq].fields.dest_mode;
- u8 delivery_mode = ioapic->redirtbl[irq].fields.delivery_mode;
- u8 vector = ioapic->redirtbl[irq].fields.vector;
- u8 trig_mode = ioapic->redirtbl[irq].fields.trig_mode;
+ union kvm_ioapic_redirect_entry entry = ioapic->redirtbl[irq];
u32 deliver_bitmask;
struct kvm_vcpu *vcpu;
int vcpu_id, r = 0;
ioapic_debug("dest=%x dest_mode=%x delivery_mode=%x "
"vector=%x trig_mode=%x\n",
- dest, dest_mode, delivery_mode, vector, trig_mode);
+ entry.fields.dest, entry.fields.dest_mode,
+ entry.fields.delivery_mode, entry.fields.vector,
+ entry.fields.trig_mode);
- deliver_bitmask = kvm_ioapic_get_delivery_bitmask(ioapic, dest,
- dest_mode);
+ kvm_get_intr_delivery_bitmask(ioapic, &entry, &deliver_bitmask);
if (!deliver_bitmask) {
ioapic_debug("no target on destination\n");
return 0;
}
- switch (delivery_mode) {
- case IOAPIC_LOWEST_PRIORITY:
- vcpu = kvm_get_lowest_prio_vcpu(ioapic->kvm, vector,
- deliver_bitmask);
+ /* Always delivery PIT interrupt to vcpu 0 */
#ifdef CONFIG_X86
- if (irq == 0)
- vcpu = ioapic->kvm->vcpus[0];
+ if (irq == 0)
+ deliver_bitmask = 1 << 0;
#endif
- if (vcpu != NULL)
- r = ioapic_inj_irq(ioapic, vcpu, vector,
- trig_mode, delivery_mode);
- else
- ioapic_debug("null lowest prio vcpu: "
- "mask=%x vector=%x delivery_mode=%x\n",
- deliver_bitmask, vector,
IOAPIC_LOWEST_PRIORITY);
- break;
- case IOAPIC_FIXED:
-#ifdef CONFIG_X86
- if (irq == 0)
- deliver_bitmask = 1;
-#endif
- for (vcpu_id = 0; deliver_bitmask != 0; vcpu_id++) {
- if (!(deliver_bitmask & (1 << vcpu_id)))
- continue;
- deliver_bitmask &= ~(1 << vcpu_id);
- vcpu = ioapic->kvm->vcpus[vcpu_id];
- if (vcpu) {
- r = ioapic_inj_irq(ioapic, vcpu, vector,
- trig_mode, delivery_mode);
- }
- }
- break;
- case IOAPIC_NMI:
- for (vcpu_id = 0; deliver_bitmask != 0; vcpu_id++) {
- if (!(deliver_bitmask & (1 << vcpu_id)))
- continue;
- deliver_bitmask &= ~(1 << vcpu_id);
- vcpu = ioapic->kvm->vcpus[vcpu_id];
- if (vcpu)
+
+ for (vcpu_id = 0; deliver_bitmask != 0; vcpu_id++) {
+ if (!(deliver_bitmask & (1 << vcpu_id)))
+ continue;
+ deliver_bitmask &= ~(1 << vcpu_id);
+ vcpu = ioapic->kvm->vcpus[vcpu_id];
+ if (vcpu) {
+ if (entry.fields.delivery_mode ==
+ IOAPIC_LOWEST_PRIORITY ||
+ entry.fields.delivery_mode == IOAPIC_FIXED)
+ r = ioapic_inj_irq(ioapic, vcpu,
+ entry.fields.vector,
+ entry.fields.trig_mode,
+ entry.fields.delivery_mode);
+ else if (entry.fields.delivery_mode == IOAPIC_NMI)
ioapic_inj_nmi(vcpu);
else
- ioapic_debug("NMI to vcpu %d failed\n",
- vcpu->vcpu_id);
- }
- break;
- default:
- printk(KERN_WARNING "Unsupported delivery mode %d\n",
- delivery_mode);
- break;
+ ioapic_debug("unsupported delivery mode %x!\n",
+ entry.fields.delivery_mode);
+ } else
+ ioapic_debug("null destination vcpu: "
+ "mask=%x vector=%x delivery_mode=%x\n",
+ entry.fields.deliver_bitmask,
+ entry.fields.vector,
+ entry.fields.delivery_mode);
}
return r;
}
diff --git a/virt/kvm/irq_comm.c b/virt/kvm/irq_comm.c
index 63cdf01..d89d8b2 100644
--- a/virt/kvm/irq_comm.c
+++ b/virt/kvm/irq_comm.c
@@ -29,6 +29,29 @@
#include "ioapic.h"
+void kvm_get_intr_delivery_bitmask(struct kvm_ioapic *ioapic,
+ union kvm_ioapic_redirect_entry *entry,
+ u32 *deliver_bitmask)
+{
+ struct kvm_vcpu *vcpu;
+
+ *deliver_bitmask = kvm_ioapic_get_delivery_bitmask(ioapic,
+ entry->fields.dest_id, entry->fields.dest_mode);
+ switch (entry->fields.delivery_mode) {
+ case IOAPIC_LOWEST_PRIORITY:
+ vcpu = kvm_get_lowest_prio_vcpu(ioapic->kvm,
+ entry->fields.vector, *deliver_bitmask);
+ *deliver_bitmask = 1 << vcpu->vcpu_id;
+ break;
+ case IOAPIC_FIXED:
+ case IOAPIC_NMI:
+ break;
+ default:
+ printk(KERN_INFO "kvm: unsupported delivery mode\n");
+ *deliver_bitmask = 0;
+ }
+}
+
/* This should be called with the kvm->lock mutex held */
void kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 gsi, int level)
{
@@ -38,7 +61,7 @@ void kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 gsi,
int level)
struct kvm_vcpu *vcpu;
struct kvm_ioapic *ioapic = ioapic_irqchip(kvm);
struct kvm_gsi_msg *gsi_msg;
- int dest_id, vector, dest_mode, trig_mode, delivery_mode;
+ union kvm_ioapic_redirect_entry entry;
u32 deliver_bitmask;
BUG_ON(!ioapic);
@@ -75,40 +98,32 @@ void kvm_set_irq(struct kvm *kvm, int irq_source_id, u32
gsi, int level)
return;
}
- dest_id = (gsi_msg->msg.address_lo & MSI_ADDR_DEST_ID_MASK)
+ entry.bits = 0;
+ entry.fields.dest_id = (gsi_msg->msg.address_lo & MSI_ADDR_DEST_ID_MASK)
>> MSI_ADDR_DEST_ID_SHIFT;
- vector = (gsi_msg->msg.data & MSI_DATA_VECTOR_MASK)
+ entry.fields.vector = (gsi_msg->msg.data & MSI_DATA_VECTOR_MASK)
>> MSI_DATA_VECTOR_SHIFT;
- dest_mode = test_bit(MSI_ADDR_DEST_MODE_SHIFT,
+ entry.fields.dest_mode = test_bit(MSI_ADDR_DEST_MODE_SHIFT,
(unsigned long *)&gsi_msg->msg.address_lo);
- trig_mode = test_bit(MSI_DATA_TRIGGER_SHIFT,
+ entry.fields.trig_mode = test_bit(MSI_DATA_TRIGGER_SHIFT,
(unsigned long *)&gsi_msg->msg.data);
- delivery_mode = test_bit(MSI_DATA_DELIVERY_MODE_SHIFT,
+ entry.fields.delivery_mode = test_bit(MSI_DATA_DELIVERY_MODE_SHIFT,
(unsigned long *)&gsi_msg->msg.data);
- deliver_bitmask = kvm_ioapic_get_delivery_bitmask(ioapic,
- dest_id, dest_mode);
- /* IOAPIC delivery mode value is the same as MSI here */
- switch (delivery_mode) {
- case IOAPIC_LOWEST_PRIORITY:
- vcpu = kvm_get_lowest_prio_vcpu(ioapic->kvm, vector,
- deliver_bitmask);
- if (vcpu != NULL)
- kvm_apic_set_irq(vcpu, vector, trig_mode);
- else
- printk(KERN_INFO "kvm: null lowest priority vcpu!\n");
- break;
- case IOAPIC_FIXED:
- for (vcpu_id = 0; deliver_bitmask != 0; vcpu_id++) {
- if (!(deliver_bitmask & (1 << vcpu_id)))
- continue;
- deliver_bitmask &= ~(1 << vcpu_id);
- vcpu = ioapic->kvm->vcpus[vcpu_id];
- if (vcpu)
- kvm_apic_set_irq(vcpu, vector, trig_mode);
- }
- break;
- default:
- printk(KERN_INFO "kvm: unsupported MSI delivery mode\n");
+
+ kvm_get_intr_delivery_bitmask(ioapic, &entry, &deliver_bitmask);
+
+ if (!deliver_bitmask) {
+ printk(KERN_WARNING "kvm: no destination for MSI delivery!");
+ return;
+ }
+ for (vcpu_id = 0; deliver_bitmask != 0; vcpu_id++) {
+ if (!(deliver_bitmask & (1 << vcpu_id)))
+ continue;
+ deliver_bitmask &= ~(1 << vcpu_id);
+ vcpu = ioapic->kvm->vcpus[vcpu_id];
+ if (vcpu)
+ kvm_apic_set_irq(vcpu, entry.fields.vector,
+ entry.fields.trig_mode);
}
#endif
}
--
1.5.4.5
--
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