apic: save apic_delivered flag

This patch implements saving/restoring of static apic_delivered variable.

v8: saving static variable only for one of the APICs

Signed-off-by: Pavel Dovgalyuk <pavel.dovgaluk@ispras.ru>
Message-Id: <20170126123429.5412.94368.stgit@PASHA-ISP>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

hw/intc/apic_common.c

@@ -385,6 +385,25 @@ static bool apic_common_sipi_needed(void *opaque)
     return s->wait_for_sipi != 0;
 }
 
+static bool apic_irq_delivered_needed(void *opaque)
+{
+    APICCommonState *s = APIC_COMMON(opaque);
+    return s->cpu == X86_CPU(first_cpu) && apic_irq_delivered != 0;
+}
+
+static void apic_irq_delivered_pre_save(void *opaque)
+{
+    APICCommonState *s = APIC_COMMON(opaque);
+    s->apic_irq_delivered = apic_irq_delivered;
+}
+
+static int apic_irq_delivered_post_load(void *opaque, int version_id)
+{
+    APICCommonState *s = APIC_COMMON(opaque);
+    apic_irq_delivered = s->apic_irq_delivered;
+    return 0;
+}
+
 static const VMStateDescription vmstate_apic_common_sipi = {
     .name = "apic_sipi",
     .version_id = 1,
@@ -397,6 +416,19 @@ static const VMStateDescription vmstate_apic_common_sipi = {
     }
 };
 
+static const VMStateDescription vmstate_apic_irq_delivered = {
+    .name = "apic_irq_delivered",
+    .version_id = 1,
+    .minimum_version_id = 1,
+    .needed = apic_irq_delivered_needed,
+    .pre_save = apic_irq_delivered_pre_save,
+    .post_load = apic_irq_delivered_post_load,
+    .fields = (VMStateField[]) {
+        VMSTATE_INT32(apic_irq_delivered, APICCommonState),
+        VMSTATE_END_OF_LIST()
+    }
+};
+
 static const VMStateDescription vmstate_apic_common = {
     .name = "apic",
     .version_id = 3,
@@ -431,6 +463,7 @@ static const VMStateDescription vmstate_apic_common = {
     },
     .subsections = (const VMStateDescription*[]) {
         &vmstate_apic_common_sipi,
+        &vmstate_apic_irq_delivered,
         NULL
     }
 };

include/hw/i386/apic_internal.h

@@ -189,6 +189,8 @@ struct APICCommonState {
     DeviceState *vapic;
     hwaddr vapic_paddr; /* note: persistence via kvmvapic */
     bool legacy_instance_id;
+
+    int apic_irq_delivered; /* for saving static variable */
 };
 
 typedef struct VAPICState {