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KVM: APIC: get rid of deliver_bitmask

Sfoglia il codice sorgente 
Deliver interrupt during destination matching loop.

Signed-off-by: Gleb Natapov <gleb@redhat.com>
Acked-by: Xiantao Zhang <xiantao.zhang@intel.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
This commit is contained in:
Gleb Natapov
2009-03-05 16:35:04 +02:00
committato da Avi Kivity
parent e1035715ef
commit 58c2dde17d
8 ha cambiato i file con 107 aggiunte e 134 eliminazioni
Scarica il file Patch Scarica il file Diff Expand all files Collapse all files

57
virt/kvm/ioapic.c
Vedi File

@@ -142,58 +142,33 @@ static void ioapic_write_indirect(struct kvm_ioapic *ioapic, u32 val)
}
}
int ioapic_deliver_entry(struct kvm *kvm, union kvm_ioapic_redirect_entry *e)
{
DECLARE_BITMAP(deliver_bitmask, KVM_MAX_VCPUS);
int i, r = -1;
kvm_get_intr_delivery_bitmask(kvm, NULL, e->fields.dest_id,
e->fields.dest_mode,
e->fields.delivery_mode == IOAPIC_LOWEST_PRIORITY,
0, deliver_bitmask);
if (find_first_bit(deliver_bitmask, KVM_MAX_VCPUS) >= KVM_MAX_VCPUS) {
ioapic_debug("no target on destination\n");
return r;
}
while ((i = find_first_bit(deliver_bitmask, KVM_MAX_VCPUS))
< KVM_MAX_VCPUS) {
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, 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",
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];
union kvm_ioapic_redirect_entry *entry = &ioapic->redirtbl[irq];
struct kvm_lapic_irq irqe;
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);
entry->fields.dest, entry->fields.dest_mode,
entry->fields.delivery_mode, entry->fields.vector,
entry->fields.trig_mode);
irqe.dest_id = entry->fields.dest_id;
irqe.vector = entry->fields.vector;
irqe.dest_mode = entry->fields.dest_mode;
irqe.trig_mode = entry->fields.trig_mode;
irqe.delivery_mode = entry->fields.delivery_mode << 8;
irqe.level = 1;
irqe.shorthand = 0;
#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;
irqe.dest_mode = 0; /* Physical mode. */
irqe.dest_id = ioapic->kvm->vcpus[0]->vcpu_id;
}
#endif
return ioapic_deliver_entry(ioapic->kvm, &entry);
return kvm_irq_delivery_to_apic(ioapic->kvm, NULL, &irqe);
}
int kvm_ioapic_set_irq(struct kvm_ioapic *ioapic, int irq, int level)

6
virt/kvm/ioapic.h
Vedi File

@@ -71,8 +71,6 @@ 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 *kvm, struct kvm_lapic *src,
int dest_id, int dest_mode, bool low_prio, int short_hand,
unsigned long *deliver_bitmask);
int ioapic_deliver_entry(struct kvm *kvm, union kvm_ioapic_redirect_entry *e);
int kvm_irq_delivery_to_apic(struct kvm *kvm, struct kvm_lapic *src,
struct kvm_lapic_irq *irq);
#endif

71
virt/kvm/irq_comm.c
Vedi File

@@ -22,6 +22,9 @@
#include <linux/kvm_host.h>
#include <asm/msidef.h>
#ifdef CONFIG_IA64
#include <asm/iosapic.h>
#endif
#include "irq.h"
@@ -43,61 +46,71 @@ 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 *kvm, struct kvm_lapic *src,
int dest_id, int dest_mode, bool low_prio, int short_hand,
unsigned long *deliver_bitmask)
inline static bool kvm_is_dm_lowest_prio(struct kvm_lapic_irq *irq)
{
int i, lowest = -1;
struct kvm_vcpu *vcpu;
#ifdef CONFIG_IA64
return irq->delivery_mode ==
(IOSAPIC_LOWEST_PRIORITY << IOSAPIC_DELIVERY_SHIFT);
#else
return irq->delivery_mode == APIC_DM_LOWEST;
#endif
}
if (dest_mode == 0 && dest_id == 0xff && low_prio)
int kvm_irq_delivery_to_apic(struct kvm *kvm, struct kvm_lapic *src,
struct kvm_lapic_irq *irq)
{
int i, r = -1;
struct kvm_vcpu *vcpu, *lowest = NULL;
if (irq->dest_mode == 0 && irq->dest_id == 0xff &&
kvm_is_dm_lowest_prio(irq))
printk(KERN_INFO "kvm: apic: phys broadcast and lowest prio\n");
bitmap_zero(deliver_bitmask, KVM_MAX_VCPUS);
for (i = 0; i < KVM_MAX_VCPUS; i++) {
vcpu = kvm->vcpus[i];
if (!vcpu || !kvm_apic_present(vcpu))
continue;
if (!kvm_apic_match_dest(vcpu, src, short_hand, dest_id,
dest_mode))
if (!kvm_apic_match_dest(vcpu, src, irq->shorthand,
irq->dest_id, irq->dest_mode))
continue;
if (!low_prio) {
__set_bit(i, deliver_bitmask);
if (!kvm_is_dm_lowest_prio(irq)) {
if (r < 0)
r = 0;
r += kvm_apic_set_irq(vcpu, irq);
} else {
if (lowest < 0)
lowest = i;
if (kvm_apic_compare_prio(vcpu, kvm->vcpus[lowest]) < 0)
lowest = i;
if (!lowest)
lowest = vcpu;
else if (kvm_apic_compare_prio(vcpu, lowest) < 0)
lowest = vcpu;
}
}
if (lowest != -1)
__set_bit(lowest, deliver_bitmask);
if (lowest)
r = kvm_apic_set_irq(lowest, irq);
return r;
}
static int kvm_set_msi(struct kvm_kernel_irq_routing_entry *e,
struct kvm *kvm, int level)
{
union kvm_ioapic_redirect_entry entry;
struct kvm_lapic_irq irq;
entry.bits = 0;
entry.fields.dest_id = (e->msi.address_lo &
irq.dest_id = (e->msi.address_lo &
MSI_ADDR_DEST_ID_MASK) >> MSI_ADDR_DEST_ID_SHIFT;
entry.fields.vector = (e->msi.data &
irq.vector = (e->msi.data &
MSI_DATA_VECTOR_MASK) >> MSI_DATA_VECTOR_SHIFT;
entry.fields.dest_mode = test_bit(MSI_ADDR_DEST_MODE_SHIFT,
(unsigned long *)&e->msi.address_lo);
entry.fields.trig_mode = test_bit(MSI_DATA_TRIGGER_SHIFT,
(unsigned long *)&e->msi.data);
entry.fields.delivery_mode = test_bit(
MSI_DATA_DELIVERY_MODE_SHIFT,
(unsigned long *)&e->msi.data);
irq.dest_mode = (1 << MSI_ADDR_DEST_MODE_SHIFT) & e->msi.address_lo;
irq.trig_mode = (1 << MSI_DATA_TRIGGER_SHIFT) & e->msi.data;
irq.delivery_mode = e->msi.data & 0x700;
irq.level = 1;
irq.shorthand = 0;
/* TODO Deal with RH bit of MSI message address */
return ioapic_deliver_entry(kvm, &entry);
return kvm_irq_delivery_to_apic(kvm, NULL, &irq);
}
/* This should be called with the kvm->lock mutex held