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authorGleb Natapov <gleb@redhat.com>2009-03-05 16:34:49 +0200
committerAvi Kivity <avi@redhat.com>2009-06-10 11:48:27 +0300
commita53c17d21c46a752f5ac6695376481bc27865b04 (patch)
treef7ece20fcb0adbf4cabc580fb5a16cf5eec0a897 /virt
parent6da7e3f643cf7099965d75fda8606b9d3a8650b9 (diff)
downloadlinux-linaro-stable-a53c17d21c46a752f5ac6695376481bc27865b04.tar.gz
KVM: ioapic/msi interrupt delivery consolidation
ioapic_deliver() and kvm_set_msi() have code duplication. Move the code into ioapic_deliver_entry() function and call it from both places. Signed-off-by: Gleb Natapov <gleb@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Diffstat (limited to 'virt')
-rw-r--r--virt/kvm/ioapic.c61
-rw-r--r--virt/kvm/ioapic.h4
-rw-r--r--virt/kvm/irq_comm.c32
3 files changed, 37 insertions, 60 deletions
diff --git a/virt/kvm/ioapic.c b/virt/kvm/ioapic.c
index d4a7948b010c..b71c0442cecf 100644
--- a/virt/kvm/ioapic.c
+++ b/virt/kvm/ioapic.c
@@ -142,54 +142,57 @@ static void ioapic_write_indirect(struct kvm_ioapic *ioapic, u32 val)
}
}
-static int ioapic_deliver(struct kvm_ioapic *ioapic, int irq)
+int ioapic_deliver_entry(struct kvm *kvm, union kvm_ioapic_redirect_entry *e)
{
- union kvm_ioapic_redirect_entry entry = ioapic->redirtbl[irq];
DECLARE_BITMAP(deliver_bitmask, KVM_MAX_VCPUS);
- struct kvm_vcpu *vcpu;
- int vcpu_id, r = -1;
+ int i, r = -1;
- ioapic_debug("dest=%x dest_mode=%x delivery_mode=%x "
- "vector=%x trig_mode=%x\n",
- entry.fields.dest, entry.fields.dest_mode,
- entry.fields.delivery_mode, entry.fields.vector,
- entry.fields.trig_mode);
-
- /* Always delivery PIT interrupt to vcpu 0 */
-#ifdef CONFIG_X86
- if (irq == 0) {
- bitmap_zero(deliver_bitmask, KVM_MAX_VCPUS);
- __set_bit(0, deliver_bitmask);
- } else
-#endif
- kvm_get_intr_delivery_bitmask(ioapic, &entry, deliver_bitmask);
+ kvm_get_intr_delivery_bitmask(kvm, e, deliver_bitmask);
if (find_first_bit(deliver_bitmask, KVM_MAX_VCPUS) >= KVM_MAX_VCPUS) {
ioapic_debug("no target on destination\n");
- return 0;
+ return r;
}
- while ((vcpu_id = find_first_bit(deliver_bitmask, KVM_MAX_VCPUS))
+ while ((i = find_first_bit(deliver_bitmask, KVM_MAX_VCPUS))
< KVM_MAX_VCPUS) {
- __clear_bit(vcpu_id, deliver_bitmask);
- vcpu = ioapic->kvm->vcpus[vcpu_id];
+ struct kvm_vcpu *vcpu = kvm->vcpus[i];
+ __clear_bit(i, deliver_bitmask);
if (vcpu) {
if (r < 0)
r = 0;
- r += kvm_apic_set_irq(vcpu,
- entry.fields.vector,
- entry.fields.trig_mode,
- entry.fields.delivery_mode);
+ r += kvm_apic_set_irq(vcpu, e->fields.vector,
+ e->fields.delivery_mode,
+ e->fields.trig_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);
+ e->fields.deliver_bitmask,
+ e->fields.vector, e->fields.delivery_mode);
}
return r;
}
+static int ioapic_deliver(struct kvm_ioapic *ioapic, int irq)
+{
+ union kvm_ioapic_redirect_entry entry = ioapic->redirtbl[irq];
+
+ ioapic_debug("dest=%x dest_mode=%x delivery_mode=%x "
+ "vector=%x trig_mode=%x\n",
+ entry.fields.dest, entry.fields.dest_mode,
+ entry.fields.delivery_mode, entry.fields.vector,
+ entry.fields.trig_mode);
+
+#ifdef CONFIG_X86
+ /* Always delivery PIT interrupt to vcpu 0 */
+ if (irq == 0) {
+ entry.fields.dest_mode = 0; /* Physical mode. */
+ entry.fields.dest_id = ioapic->kvm->vcpus[0]->vcpu_id;
+ }
+#endif
+ return ioapic_deliver_entry(ioapic->kvm, &entry);
+}
+
int kvm_ioapic_set_irq(struct kvm_ioapic *ioapic, int irq, int level)
{
u32 old_irr = ioapic->irr;
diff --git a/virt/kvm/ioapic.h b/virt/kvm/ioapic.h
index c8032ab2a4e2..bedeea59cc1c 100644
--- a/virt/kvm/ioapic.h
+++ b/virt/kvm/ioapic.h
@@ -70,8 +70,8 @@ void kvm_ioapic_update_eoi(struct kvm *kvm, int vector, int trigger_mode);
int kvm_ioapic_init(struct kvm *kvm);
int kvm_ioapic_set_irq(struct kvm_ioapic *ioapic, int irq, int level);
void kvm_ioapic_reset(struct kvm_ioapic *ioapic);
-void kvm_get_intr_delivery_bitmask(struct kvm_ioapic *ioapic,
+void kvm_get_intr_delivery_bitmask(struct kvm *kvm,
union kvm_ioapic_redirect_entry *entry,
unsigned long *deliver_bitmask);
-
+int ioapic_deliver_entry(struct kvm *kvm, union kvm_ioapic_redirect_entry *e);
#endif
diff --git a/virt/kvm/irq_comm.c b/virt/kvm/irq_comm.c
index 325c6685f206..35397a569b24 100644
--- a/virt/kvm/irq_comm.c
+++ b/virt/kvm/irq_comm.c
@@ -43,12 +43,11 @@ static int kvm_set_ioapic_irq(struct kvm_kernel_irq_routing_entry *e,
return kvm_ioapic_set_irq(kvm->arch.vioapic, e->irqchip.pin, level);
}
-void kvm_get_intr_delivery_bitmask(struct kvm_ioapic *ioapic,
+void kvm_get_intr_delivery_bitmask(struct kvm *kvm,
union kvm_ioapic_redirect_entry *entry,
unsigned long *deliver_bitmask)
{
int i;
- struct kvm *kvm = ioapic->kvm;
struct kvm_vcpu *vcpu;
bitmap_zero(deliver_bitmask, KVM_MAX_VCPUS);
@@ -90,7 +89,7 @@ void kvm_get_intr_delivery_bitmask(struct kvm_ioapic *ioapic,
switch (entry->fields.delivery_mode) {
case IOAPIC_LOWEST_PRIORITY:
/* Select one in deliver_bitmask */
- vcpu = kvm_get_lowest_prio_vcpu(ioapic->kvm,
+ vcpu = kvm_get_lowest_prio_vcpu(kvm,
entry->fields.vector, deliver_bitmask);
bitmap_zero(deliver_bitmask, KVM_MAX_VCPUS);
if (!vcpu)
@@ -111,13 +110,7 @@ void kvm_get_intr_delivery_bitmask(struct kvm_ioapic *ioapic,
static int kvm_set_msi(struct kvm_kernel_irq_routing_entry *e,
struct kvm *kvm, int level)
{
- 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);
-
- BUG_ON(!ioapic);
entry.bits = 0;
entry.fields.dest_id = (e->msi.address_lo &
@@ -133,26 +126,7 @@ static int kvm_set_msi(struct kvm_kernel_irq_routing_entry *e,
(unsigned long *)&e->msi.data);
/* TODO Deal with RH bit of MSI message address */
-
- kvm_get_intr_delivery_bitmask(ioapic, &entry, deliver_bitmask);
-
- 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 (r < 0)
- r = 0;
- r += kvm_apic_set_irq(vcpu, entry.fields.vector,
- entry.fields.dest_mode,
- entry.fields.trig_mode);
- }
- }
- return r;
+ return ioapic_deliver_entry(kvm, &entry);
}
/* This should be called with the kvm->lock mutex held