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KVM: Introduce struct rtc_status 

rtc_status is used to track RTC interrupt delivery status. The pending_eoi
will be increased by vcpu who received RTC interrupt and will be decreased
when EOI to this interrupt.
Also, we use dest_map to record the destination vcpu to avoid the case that
vcpu who didn't get the RTC interupt, but issued EOI with same vector of RTC
and descreased pending_eoi by mistake.

Signed-off-by: Yang Zhang <yang.z.zhang@Intel.com>
Reviewed-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
This commit is contained in:
Yang Zhang 2013-04-11 19:21:36 +08:00 committed by Marcelo Tosatti
parent 1fcc7890db
commit 8dc6aade5b
1 changed files with 12 additions and 0 deletions
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12
virt/kvm/ioapic.h
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@ -34,6 +34,17 @@ struct kvm_vcpu;
#define IOAPIC_INIT 0x5 #define IOAPIC_INIT 0x5
#define IOAPIC_EXTINT 0x7 #define IOAPIC_EXTINT 0x7
#ifdef CONFIG_X86
#define RTC_GSI 8
#else
#define RTC_GSI -1U
#endif
struct rtc_status {
int pending_eoi;
DECLARE_BITMAP(dest_map, KVM_MAX_VCPUS);
};
struct kvm_ioapic { struct kvm_ioapic {
u64 base_address; u64 base_address;
u32 ioregsel; u32 ioregsel;
@ -47,6 +58,7 @@ struct kvm_ioapic {
void (*ack_notifier)(void *opaque, int irq); void (*ack_notifier)(void *opaque, int irq);
spinlock_t lock; spinlock_t lock;
DECLARE_BITMAP(handled_vectors, 256); DECLARE_BITMAP(handled_vectors, 256);
struct rtc_status rtc_status;
}; };
#ifdef DEBUG #ifdef DEBUG