On Fri, Oct 24, 2025 at 02:56:28PM +0800, Zhao Liu wrote:
>Cet-u and cet-s are supervisor xstates. Their states are saved/loaded by
>saving/loading related CET MSRs. And there's a vmsd "vmstate_cet" to
>migrate these MSRs.
>
>Thus, it's safe to mark them as migratable.
>
>Tested-by: Farrah Chen <[email protected]>
>Signed-off-by: Zhao Liu <[email protected]>
>---
> 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 0bb65e8c5321..c08066a338a3 100644
>--- a/target/i386/cpu.c
>+++ b/target/i386/cpu.c
>@@ -1522,7 +1522,8 @@ FeatureWordInfo feature_word_info[FEATURE_WORDS] = {
> .migratable_flags = XSTATE_FP_MASK | XSTATE_SSE_MASK |
> XSTATE_YMM_MASK | XSTATE_BNDREGS_MASK | XSTATE_BNDCSR_MASK |
> XSTATE_OPMASK_MASK | XSTATE_ZMM_Hi256_MASK | XSTATE_Hi16_ZMM_MASK
> |
>- XSTATE_PKRU_MASK | XSTATE_ARCH_LBR_MASK | XSTATE_XTILE_CFG_MASK |
>+ XSTATE_PKRU_MASK | XSTATE_CET_U_MASK | XSTATE_CET_S_MASK |
>+ XSTATE_ARCH_LBR_MASK | XSTATE_XTILE_CFG_MASK |
> XSTATE_XTILE_DATA_MASK,
Supervisor states are enumerated via CPUID[EAX=0xd,ECX=1].ECX/EDX while user
states are enumerated via CPUID[EAX=0xd,ECX=0].EAX/EDX. So, maybe we need to
two new feature words?
> },
> [FEAT_XSAVE_XCR0_HI] = {
>--
>2.34.1
>
