[PATCH v4 19/23] i386/cpu: Mark cet-u & cet-s xstates as migratable

[Zhao Liu <zhao1.liu@intel.com>]

Cet-u and cet-s are supervisor xstates. Their states are saved/loaded by
saving/loading related CET MSRs. And there're the "vmstate_cet" and
"vmstate_pl0_ssp" to migrate these MSRs.

Thus, it's safe to mark them as migratable.

Tested-by: Farrah Chen <farrah.chen@intel.com>
Signed-off-by: Zhao Liu <zhao1.liu@intel.com>
---
Changes Since v3:
 - Add the flags in FEAT_XSAVE_XSS_LO.
---
 target/i386/cpu.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/target/i386/cpu.c b/target/i386/cpu.c
index 4d29e784061c..848e3ccbb8e3 100644
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -1484,7 +1484,8 @@ FeatureWordInfo feature_word_info[FEATURE_WORDS] = {
             .ecx = 1,
             .reg = R_ECX,
         },
-        .migratable_flags = XSTATE_ARCH_LBR_MASK,
+        .migratable_flags = XSTATE_CET_U_MASK | XSTATE_CET_S_MASK |
+            XSTATE_ARCH_LBR_MASK,
     },
     [FEAT_XSAVE_XSS_HI] = {
         .type = CPUID_FEATURE_WORD,
-- 
2.34.1