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Diffstat (limited to 'virt/kvm/ioapic.c')
-rw-r--r--virt/kvm/ioapic.c54
1 files changed, 23 insertions, 31 deletions
diff --git a/virt/kvm/ioapic.c b/virt/kvm/ioapic.c
index 4232fd75dd20..44589088941f 100644
--- a/virt/kvm/ioapic.c
+++ b/virt/kvm/ioapic.c
@@ -45,7 +45,7 @@
#else
#define ioapic_debug(fmt, arg...)
#endif
-static void ioapic_deliver(struct kvm_ioapic *vioapic, int irq);
+static int ioapic_deliver(struct kvm_ioapic *vioapic, int irq);
static unsigned long ioapic_read_indirect(struct kvm_ioapic *ioapic,
unsigned long addr,
@@ -89,8 +89,8 @@ static void ioapic_service(struct kvm_ioapic *ioapic, unsigned int idx)
pent = &ioapic->redirtbl[idx];
if (!pent->fields.mask) {
- ioapic_deliver(ioapic, idx);
- if (pent->fields.trig_mode == IOAPIC_LEVEL_TRIG)
+ int injected = ioapic_deliver(ioapic, idx);
+ if (injected && pent->fields.trig_mode == IOAPIC_LEVEL_TRIG)
pent->fields.remote_irr = 1;
}
if (!pent->fields.trig_mode)
@@ -133,7 +133,7 @@ static void ioapic_write_indirect(struct kvm_ioapic *ioapic, u32 val)
}
}
-static void ioapic_inj_irq(struct kvm_ioapic *ioapic,
+static int ioapic_inj_irq(struct kvm_ioapic *ioapic,
struct kvm_vcpu *vcpu,
u8 vector, u8 trig_mode, u8 delivery_mode)
{
@@ -143,7 +143,7 @@ static void ioapic_inj_irq(struct kvm_ioapic *ioapic,
ASSERT((delivery_mode == IOAPIC_FIXED) ||
(delivery_mode == IOAPIC_LOWEST_PRIORITY));
- kvm_apic_set_irq(vcpu, vector, trig_mode);
+ return kvm_apic_set_irq(vcpu, vector, trig_mode);
}
static u32 ioapic_get_delivery_bitmask(struct kvm_ioapic *ioapic, u8 dest,
@@ -186,7 +186,7 @@ static u32 ioapic_get_delivery_bitmask(struct kvm_ioapic *ioapic, u8 dest,
return mask;
}
-static void ioapic_deliver(struct kvm_ioapic *ioapic, int irq)
+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;
@@ -195,7 +195,7 @@ static void ioapic_deliver(struct kvm_ioapic *ioapic, int irq)
u8 trig_mode = ioapic->redirtbl[irq].fields.trig_mode;
u32 deliver_bitmask;
struct kvm_vcpu *vcpu;
- int vcpu_id;
+ int vcpu_id, r = 0;
ioapic_debug("dest=%x dest_mode=%x delivery_mode=%x "
"vector=%x trig_mode=%x\n",
@@ -204,7 +204,7 @@ static void ioapic_deliver(struct kvm_ioapic *ioapic, int irq)
deliver_bitmask = ioapic_get_delivery_bitmask(ioapic, dest, dest_mode);
if (!deliver_bitmask) {
ioapic_debug("no target on destination\n");
- return;
+ return 0;
}
switch (delivery_mode) {
@@ -216,7 +216,7 @@ static void ioapic_deliver(struct kvm_ioapic *ioapic, int irq)
vcpu = ioapic->kvm->vcpus[0];
#endif
if (vcpu != NULL)
- ioapic_inj_irq(ioapic, vcpu, vector,
+ r = ioapic_inj_irq(ioapic, vcpu, vector,
trig_mode, delivery_mode);
else
ioapic_debug("null lowest prio vcpu: "
@@ -234,7 +234,7 @@ static void ioapic_deliver(struct kvm_ioapic *ioapic, int irq)
deliver_bitmask &= ~(1 << vcpu_id);
vcpu = ioapic->kvm->vcpus[vcpu_id];
if (vcpu) {
- ioapic_inj_irq(ioapic, vcpu, vector,
+ r = ioapic_inj_irq(ioapic, vcpu, vector,
trig_mode, delivery_mode);
}
}
@@ -246,6 +246,7 @@ static void ioapic_deliver(struct kvm_ioapic *ioapic, int irq)
delivery_mode);
break;
}
+ return r;
}
void kvm_ioapic_set_irq(struct kvm_ioapic *ioapic, int irq, int level)
@@ -268,35 +269,26 @@ void kvm_ioapic_set_irq(struct kvm_ioapic *ioapic, int irq, int level)
}
}
-static int get_eoi_gsi(struct kvm_ioapic *ioapic, int vector)
+static void __kvm_ioapic_update_eoi(struct kvm_ioapic *ioapic, int gsi)
{
- int i;
-
- for (i = 0; i < IOAPIC_NUM_PINS; i++)
- if (ioapic->redirtbl[i].fields.vector == vector)
- return i;
- return -1;
-}
-
-void kvm_ioapic_update_eoi(struct kvm *kvm, int vector)
-{
- struct kvm_ioapic *ioapic = kvm->arch.vioapic;
union ioapic_redir_entry *ent;
- int gsi;
-
- gsi = get_eoi_gsi(ioapic, vector);
- if (gsi == -1) {
- printk(KERN_WARNING "Can't find redir item for %d EOI\n",
- vector);
- return;
- }
ent = &ioapic->redirtbl[gsi];
ASSERT(ent->fields.trig_mode == IOAPIC_LEVEL_TRIG);
ent->fields.remote_irr = 0;
if (!ent->fields.mask && (ioapic->irr & (1 << gsi)))
- ioapic_deliver(ioapic, gsi);
+ ioapic_service(ioapic, gsi);
+}
+
+void kvm_ioapic_update_eoi(struct kvm *kvm, int vector)
+{
+ struct kvm_ioapic *ioapic = kvm->arch.vioapic;
+ int i;
+
+ for (i = 0; i < IOAPIC_NUM_PINS; i++)
+ if (ioapic->redirtbl[i].fields.vector == vector)
+ __kvm_ioapic_update_eoi(ioapic, i);
}
static int ioapic_in_range(struct kvm_io_device *this, gpa_t addr)