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bh=SNPluIGqzQFzA2wtuOabw//XnigjK8NroKcshcX3968=; b=ELuPXcs4c7hj4eQQgd6IMHt16DsUSd8LOyfgYw0DbMFHGaZN883jvjNj5bhOhHMHV9kaSN WjqQofXCPpU/daY8sq8vHs+DjvLFvtmd86nXkpL7K6aDw+72EkODnFndmkeYwmqZL965it YXBEvsZrveEvk0UIA+2JRaIO0N0h1eA= X-MC-Unique: 4BMeOV7JPk6aF2eN_iSE-w-1 From: Paolo Bonzini To: qemu-devel@nongnu.org Subject: [PULL 28/92] i386/cpu: Clear FEAT_XSAVE_COMP_{LO, HI} when XSAVE is not available Date: Thu, 24 Sep 2020 05:22:10 -0400 Message-Id: <20200924092314.1722645-29-pbonzini@redhat.com> In-Reply-To: <20200924092314.1722645-1-pbonzini@redhat.com> References: <20200924092314.1722645-1-pbonzini@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=pbonzini@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com 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; 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charset="utf-8" From: Xiaoyao Li Per Intel SDM vol 1, 13.2, if CPUID.1:ECX.XSAVE[bit 26] is 0, the processor provides no further enumeration through CPUID function 0DH. QEMU does not do this for "-cpu host,-xsave". Signed-off-by: Xiaoyao Li Message-Id: <20200716082019.215316-2-xiaoyao.li@intel.com> Signed-off-by: Paolo Bonzini --- target/i386/cpu.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/target/i386/cpu.c b/target/i386/cpu.c index 23e9a17a04..7eb708bedb 100644 --- a/target/i386/cpu.c +++ b/target/i386/cpu.c @@ -6268,6 +6268,8 @@ static void x86_cpu_enable_xsave_components(X86CPU *c= pu) uint64_t mask; =20 if (!(env->features[FEAT_1_ECX] & CPUID_EXT_XSAVE)) { + env->features[FEAT_XSAVE_COMP_LO] =3D 0; + env->features[FEAT_XSAVE_COMP_HI] =3D 0; return; } =20 --=20 2.26.2