kvm: get/set PV EOI MSR

Support get/set of new PV EOI MSR, for migration.
Add an optional section for MSR value - send it
out in case MSR was changed from the default value (0).

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

1 files changed, 21 insertions, 0 deletions

diff --git a/target-i386/machine.c b/target-i386/machine.c
index a8be058d2d..477150887b 100644
--- a/target-i386/machine.c
+++ b/target-i386/machine.c
@@ -279,6 +279,13 @@ static bool async_pf_msr_needed(void *opaque)
     return cpu->async_pf_en_msr != 0;
 }
 
+static bool pv_eoi_msr_needed(void *opaque)
+{
+    CPUX86State *cpu = opaque;
+
+    return cpu->pv_eoi_en_msr != 0;
+}
+
 static const VMStateDescription vmstate_async_pf_msr = {
     .name = "cpu/async_pf_msr",
     .version_id = 1,
@@ -290,6 +297,17 @@ static const VMStateDescription vmstate_async_pf_msr = {
     }
 };
 
+static const VMStateDescription vmstate_pv_eoi_msr = {
+    .name = "cpu/async_pv_eoi_msr",
+    .version_id = 1,
+    .minimum_version_id = 1,
+    .minimum_version_id_old = 1,
+    .fields      = (VMStateField []) {
+        VMSTATE_UINT64(pv_eoi_en_msr, CPUX86State),
+        VMSTATE_END_OF_LIST()
+    }
+};
+
 static bool fpop_ip_dp_needed(void *opaque)
 {
     CPUX86State *env = opaque;
@@ -454,6 +472,9 @@ static const VMStateDescription vmstate_cpu = {
             .vmsd = &vmstate_async_pf_msr,
             .needed = async_pf_msr_needed,
         } , {
+            .vmsd = &vmstate_pv_eoi_msr,
+            .needed = pv_eoi_msr_needed,
+        } , {
             .vmsd = &vmstate_fpop_ip_dp,
             .needed = fpop_ip_dp_needed,
         }, {