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KVM: Merge kvm_ioapic_get_delivery_bitmask into kvm_get_intr_delivery_bitmask 

Gleb fixed bitmap ops usage in kvm_ioapic_get_delivery_bitmask.

Sheng merged two functions, as well as fixed several issues in
kvm_get_intr_delivery_bitmask
1. deliver_bitmask is a bitmap rather than a unsigned long intereger.
2. Lowest priority target bitmap wrong calculated by mistake.
3. Prevent potential NULL reference.
4. Declaration in include/kvm_host.h caused powerpc compilation warning.
5. Add warning for guest broadcast interrupt with lowest priority delivery mode.
6. Removed duplicate bitmap clean up in caller of kvm_get_intr_delivery_bitmask.

Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Sheng Yang <sheng@linux.intel.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
This commit is contained in:
Sheng Yang 2009-03-04 13:33:02 +08:00 committed by Avi Kivity
parent 3f5e06f879
commit 74a3a8f152
3 changed files with 49 additions and 51 deletions
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46
virt/kvm/ioapic.c
View File

@ -161,45 +161,6 @@ static void ioapic_inj_nmi(struct kvm_vcpu *vcpu)
kvm_vcpu_kick(vcpu);
}
void kvm_ioapic_get_delivery_bitmask(struct kvm_ioapic *ioapic, u8 dest,
u8 dest_mode, unsigned long *mask)
{
int i;
struct kvm *kvm = ioapic->kvm;
struct kvm_vcpu *vcpu;
ioapic_debug("dest %d dest_mode %d\n", dest, dest_mode);
*mask = 0;
if (dest_mode == 0) { /* Physical mode. */
if (dest == 0xFF) { /* Broadcast. */
for (i = 0; i < KVM_MAX_VCPUS; ++i)
if (kvm->vcpus[i] && kvm->vcpus[i]->arch.apic)
*mask |= 1 << i;
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, dest)) {
if (vcpu->arch.apic)
*mask = 1 << i;
break;
}
}
} else if (dest != 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, dest))
*mask |= 1 << vcpu->vcpu_id;
}
ioapic_debug("mask %x\n", *mask);
}
static int ioapic_deliver(struct kvm_ioapic *ioapic, int irq)
{
union kvm_ioapic_redirect_entry entry = ioapic->redirtbl[irq];
@ -213,13 +174,12 @@ static int ioapic_deliver(struct kvm_ioapic *ioapic, int irq)
entry.fields.delivery_mode, entry.fields.vector,
entry.fields.trig_mode);
bitmap_zero(deliver_bitmask, KVM_MAX_VCPUS);
/* Always delivery PIT interrupt to vcpu 0 */
#ifdef CONFIG_X86
if (irq == 0)
if (irq == 0) {
bitmap_zero(deliver_bitmask, KVM_MAX_VCPUS);
__set_bit(0, deliver_bitmask);
else
} else
#endif
kvm_get_intr_delivery_bitmask(ioapic, &entry, deliver_bitmask);

5
virt/kvm/ioapic.h
View File

@ -70,7 +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_ioapic_get_delivery_bitmask(struct kvm_ioapic *ioapic, u8 dest,
u8 dest_mode, unsigned long *mask);
void kvm_get_intr_delivery_bitmask(struct kvm_ioapic *ioapic,
union kvm_ioapic_redirect_entry *entry,
unsigned long *deliver_bitmask);
#endif

49
virt/kvm/irq_comm.c
View File

@ -47,15 +47,54 @@ void kvm_get_intr_delivery_bitmask(struct kvm_ioapic *ioapic,
union kvm_ioapic_redirect_entry *entry,
unsigned long *deliver_bitmask)
{
int i;
struct kvm *kvm = ioapic->kvm;
struct kvm_vcpu *vcpu;
kvm_ioapic_get_delivery_bitmask(ioapic, entry->fields.dest_id,
entry->fields.dest_mode,
deliver_bitmask);
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:
@ -65,7 +104,7 @@ void kvm_get_intr_delivery_bitmask(struct kvm_ioapic *ioapic,
if (printk_ratelimit())
printk(KERN_INFO "kvm: unsupported delivery mode %d\n",
entry->fields.delivery_mode);
*deliver_bitmask = 0;
bitmap_zero(deliver_bitmask, KVM_MAX_VCPUS);
}
}
@ -80,8 +119,6 @@ static int kvm_set_msi(struct kvm_kernel_irq_routing_entry *e,
BUG_ON(!ioapic);
bitmap_zero(deliver_bitmask, KVM_MAX_VCPUS);
entry.bits = 0;
entry.fields.dest_id = (e->msi.address_lo &
MSI_ADDR_DEST_ID_MASK) >> MSI_ADDR_DEST_ID_SHIFT;