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>

diff --git a/virt/kvm/ioapic.h b/virt/kvm/ioapic.h
index 2fc61a5..87cd94b 100644 (file)
--- a/virt/kvm/ioapic.h
+++ b/virt/kvm/ioapic.h
@@ -34,6 +34,17 @@ struct kvm_vcpu;
 #define        IOAPIC_INIT                     0x5
 #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 {
        u64 base_address;
        u32 ioregsel;
@@ -47,6 +58,7 @@ struct kvm_ioapic {
        void (*ack_notifier)(void *opaque, int irq);
        spinlock_t lock;
        DECLARE_BITMAP(handled_vectors, 256);
+       struct rtc_status rtc_status;
 };
 
 #ifdef DEBUG