[PATCH v3 3/3] target-i386: add pkeys support for vm migration

[Huaitong Han]

This patch adds pkeys support for vm migration.

Signed-off-by: Huaitong Han <huaitong....@intel.com>

diff --git a/target-i386/machine.c b/target-i386/machine.c
index a0df64b..1b190c7 100644
--- a/target-i386/machine.c
+++ b/target-i386/machine.c
@@ -725,6 +725,26 @@ static const VMStateDescription vmstate_xss = {
         VMSTATE_END_OF_LIST()
     }
 };
+#ifdef TARGET_X86_64
+static bool pkru_needed(void *opaque)
+{
+    X86CPU *cpu = opaque;
+    CPUX86State *env = &cpu->env;
+
+    return env->pkru != 0;
+}
+
+static const VMStateDescription vmstate_pkru = {
+    .name = "cpu/pkru",
+    .version_id = 1,
+    .minimum_version_id = 1,
+    .needed = pkru_needed,
+    .fields = (VMStateField[]){
+        VMSTATE_UINT32(env.pkru, X86CPU),
+        VMSTATE_END_OF_LIST()
+    }
+};
+#endif
 
 VMStateDescription vmstate_x86_cpu = {
     .name = "cpu",
@@ -844,6 +864,9 @@ VMStateDescription vmstate_x86_cpu = {
         &vmstate_msr_hyperv_time,
         &vmstate_avx512,
         &vmstate_xss,
+#ifdef TARGET_X86_64
+        &vmstate_pkru,
+#endif
         NULL
     }
 };
-- 
2.4.3

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