On Fri, Oct 24, 2025 at 02:56:28PM +0800, Zhao Liu wrote:
> Date: Fri, 24 Oct 2025 14:56:28 +0800
> From: Zhao Liu <zhao1.liu@intel.com>
> Subject: [PATCH v3 16/20] i386/cpu: Mark cet-u & cet-s xstates as migratable
> X-Mailer: git-send-email 2.34.1
>
> 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 <farrah.chen@intel.com>
> Signed-off-by: Zhao Liu <zhao1.liu@intel.com>
> ---
> 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 |
CET-U & CET-S should be added to FEAT_XSAVE_XSS_LO.
> + XSTATE_ARCH_LBR_MASK | XSTATE_XTILE_CFG_MASK |
> XSTATE_XTILE_DATA_MASK,
> },
> [FEAT_XSAVE_XCR0_HI] = {
> --
> 2.34.1
>