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bh=KR0lGvXEtHKULPAHS7WqwZOVqTYA998f3d3hmks2HYk=; b=aN5siH44DUQ3UIxZbpoGRkIDx/iT8X/+p61Bl/MudWoswt6vt0u1XjXFyO4Wlbctt0mVNs iNgKRwrgrhxev4wnV58XslZ9p2NFopZONsJFml9IDRi5U9kDm/FwNNVMaw3M5EFUZafnRV mPwZfted7f9Aw8wg7LY60MxvAYeKy3I= X-MC-Unique: sTiUHwebMMyJ5iC2q-0s7A-1 From: Paolo Bonzini To: qemu-devel@nongnu.org Subject: [PULL 30/57] i386/cpu: Clear FEAT_XSAVE_COMP_{LO, HI} when XSAVE is not available Date: Sat, 19 Sep 2020 11:58:49 -0400 Message-Id: <20200919155916.1046398-31-pbonzini@redhat.com> In-Reply-To: <20200919155916.1046398-1-pbonzini@redhat.com> References: <20200919155916.1046398-1-pbonzini@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 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 7603784351..053385c2b4 100644 --- a/target/i386/cpu.c +++ b/target/i386/cpu.c @@ -6372,6 +6372,8 @@ 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