target-i386: Add PKU and and OSPKE support

Add PKU and OSPKE CPUID features, including xsave state and
migration support.

Signed-off-by: Huaitong Han <huaitong.han@intel.com>
Reviewed-by: Eduardo Habkost <ehabkost@redhat.com>
[ehabkost: squashed 3 patches together, edited patch description]
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>

1 files changed, 24 insertions, 0 deletions

diff --git a/target-i386/machine.c b/target-i386/machine.c
index 0d381ac0c0..6be73413cb 100644
--- a/target-i386/machine.c
+++ b/target-i386/machine.c
@@ -848,6 +848,27 @@ static const VMStateDescription vmstate_xss = {
     }
 };
 
+#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
+
 static bool tsc_khz_needed(void *opaque)
 {
     X86CPU *cpu = opaque;
@@ -991,6 +1012,9 @@ VMStateDescription vmstate_x86_cpu = {
         &vmstate_avx512,
         &vmstate_xss,
         &vmstate_tsc_khz,
+#ifdef TARGET_X86_64
+        &vmstate_pkru,
+#endif
         NULL
     }
 };