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a="74137891" X-IronPort-AV: E=Sophos;i="6.19,251,1754982000"; d="scan'208";a="74137891" X-CSE-ConnectionGUID: zdda8MoeRuaoDINh3c/nxA== X-CSE-MsgGUID: mKBG2dchQsOb/9ZT/rM9Xg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.19,251,1754982000"; d="scan'208";a="184276073" From: Zhao Liu To: Paolo Bonzini , Marcelo Tosatti Cc: qemu-devel@nongnu.org, kvm@vger.kernel.org, Chao Gao , John Allen , Babu Moger , Mathias Krause , Dapeng Mi , Zide Chen , Chenyi Qiang , Xiaoyao Li , Farrah Chen , Zhao Liu Subject: [PATCH v3 10/20] i386/cpu: Add missing migratable xsave features Date: Fri, 24 Oct 2025 14:56:22 +0800 Message-Id: <20251024065632.1448606-11-zhao1.liu@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20251024065632.1448606-1-zhao1.liu@intel.com> References: <20251024065632.1448606-1-zhao1.liu@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=192.198.163.9; envelope-from=zhao1.liu@intel.com; helo=mgamail.intel.com X-Spam_score_int: -43 X-Spam_score: -4.4 X-Spam_bar: ---- X-Spam_report: (-4.4 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_MED=-2.3, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @intel.com) X-ZM-MESSAGEID: 1761287780678158500 Content-Type: text/plain; charset="utf-8" Xtile-cfg & xtile-data are both user xstates. Their xstates are cached in X86CPUState, and there's a related vmsd "vmstate_amx_xtile", so that it's safe to mark them as migratable. Arch lbr xstate is a supervisor xstate, and it is save & load by saving & loading related arch lbr MSRs, which are cached in X86CPUState, and there's a related vmsd "vmstate_arch_lbr". So it's also safe to mark it as migratable (even though KVM hasn't supported it - its migration support is completed in QEMU). PT is still unmigratable since KVM disabled it and there's no vmsd and no other emulation/simulation support. Tested-by: Farrah Chen Signed-off-by: Zhao Liu --- 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 1917376dbea9..b01729ad36d2 100644 --- a/target/i386/cpu.c +++ b/target/i386/cpu.c @@ -1522,7 +1522,8 @@ FeatureWordInfo feature_word_info[FEATURE_WORDS] =3D { .migratable_flags =3D 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_M= ASK | - XSTATE_PKRU_MASK, + XSTATE_PKRU_MASK | XSTATE_ARCH_LBR_MASK | XSTATE_XTILE_CFG_MAS= K | + XSTATE_XTILE_DATA_MASK, }, [FEAT_XSAVE_XCR0_HI] =3D { .type =3D CPUID_FEATURE_WORD, --=20 2.34.1