[RFC PATCH 11/13] kvm/apic: Disable in-kernel APIC support for mirror vcpu's.

[Ashish Kalra]

From: Ashish Kalra <ashish.kalra@amd.com>

Mirror VM does not support any interrupt controller and this
requires disabling the in-kernel APIC support on mirror vcpu's.

Signed-off-by: Ashish Kalra <ashish.kalra@amd.com>
---
 hw/i386/kvm/apic.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/hw/i386/kvm/apic.c b/hw/i386/kvm/apic.c
index 1e89ca0899..902fe49fc7 100644
--- a/hw/i386/kvm/apic.c
+++ b/hw/i386/kvm/apic.c
@@ -125,6 +125,11 @@ static void kvm_apic_vapic_base_update(APICCommonState *s)
         .vapic_addr = s->vapic_paddr,
     };
     int ret;
+    CPUState *cpu = CPU(s->cpu);
+
+    if (cpu->mirror_vcpu) {
+        return;
+    }
 
     ret = kvm_vcpu_ioctl(CPU(s->cpu), KVM_SET_VAPIC_ADDR, &vapid_addr);
     if (ret < 0) {
@@ -139,6 +144,11 @@ static void kvm_apic_put(CPUState *cs, run_on_cpu_data 
data)
     APICCommonState *s = data.host_ptr;
     struct kvm_lapic_state kapic;
     int ret;
+    CPUState *cpu = CPU(s->cpu);
+
+    if (cpu->mirror_vcpu) {
+        return;
+    }
 
     kvm_put_apicbase(s->cpu, s->apicbase);
     kvm_put_apic_state(s, &kapic);
@@ -227,6 +237,11 @@ static void kvm_apic_reset(APICCommonState *s)
 static void kvm_apic_realize(DeviceState *dev, Error **errp)
 {
     APICCommonState *s = APIC_COMMON(dev);
+    CPUState *cpu = CPU(s->cpu);
+
+    if (cpu->mirror_vcpu) {
+        return;
+    }
 
     memory_region_init_io(&s->io_memory, OBJECT(s), &kvm_apic_io_ops, s,
                           "kvm-apic-msi", APIC_SPACE_SIZE);
-- 
2.17.1