xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

KVM: Unify the delivery of IOAPIC and MSI interrupts

Browse Source 
Signed-off-by: Sheng Yang <sheng@linux.intel.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Sheng Yang
2009-02-11 16:03:37 +08:00
committed by Avi Kivity
parent cf9e4e15e8
commit 116191b69b
3 changed files with 95 additions and 94 deletions
Download Patch File Download Diff File Expand all files Collapse all files

91
virt/kvm/ioapic.c
View File

@@ -203,79 +203,56 @@ 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;
u32 deliver_bitmask;
union kvm_ioapic_redirect_entry entry = ioapic->redirtbl[irq];
unsigned long deliver_bitmask;
struct kvm_vcpu *vcpu;
int vcpu_id, r = -1;
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;
#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) {
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) {
if (r < 0)
r = 0;
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) {
ioapic_inj_nmi(vcpu);
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) {
r = 1;
}
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_inj_nmi(vcpu);
} else
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;
}