[v1] Misc patches for 2020-09-24

[PULL 28/92] i386/cpu: Clear FEAT_XSAVE_COMP_{LO, HI} when XSAVE is not available

Paolo Bonzini posted 92 patches 5 years, 4 months ago

Diff against v2 v3 v4 v5 v6 v7
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Maintainers: Fam Zheng <fam@euphon.net>, "Dr. David Alan Gilbert" <dgilbert@redhat.com>, Stefan Hajnoczi <stefanha@redhat.com>, "Alex Bennée" <alex.bennee@linaro.org>, Thomas Huth <thuth@redhat.com>, Gerd Hoffmann <kraxel@redhat.com>, Christian Borntraeger <borntraeger@de.ibm.com>, Markus Armbruster <armbru@redhat.com>, Bandan Das <bsd@redhat.com>, Marcelo Tosatti <mtosatti@redhat.com>, Michael Roth <mdroth@linux.vnet.ibm.com>, Peter Maydell <peter.maydell@linaro.org>, Jason Wang <jasowang@redhat.com>, Paolo Bonzini <pbonzini@redhat.com>, Sergio Lopez <slp@redhat.com>, Igor Mammedov <imammedo@redhat.com>, Laurent Vivier <lvivier@redhat.com>, Hannes Reinecke <hare@suse.com>, Stefan Weil <sw@weilnetz.de>, Cleber Rosa <crosa@redhat.com>, Aleksandar Markovic <aleksandar.qemu.devel@gmail.com>, David Hildenbrand <david@redhat.com>, Aurelien Jarno <aurelien@aurel32.net>, Marcel Apfelbaum <marcel.apfelbaum@gmail.com>, Eric Blake <eblake@redhat.com>, "Daniel P. Berrangé" <berrange@redhat.com>, Alexander Bulekov <alxndr@bu.edu>, "Michael S. Tsirkin" <mst@redhat.com>, David Gibson <david@gibson.dropbear.id.au>, Max Reitz <mreitz@redhat.com>, Eduardo Habkost <ehabkost@redhat.com>, Sunil Muthuswamy <sunilmut@microsoft.com>, Richard Henderson <rth@twiddle.net>, Jiaxun Yang <jiaxun.yang@flygoat.com>, Kevin Wolf <kwolf@redhat.com>, Cornelia Huck <cohuck@redhat.com>, Aleksandar Rikalo <aleksandar.rikalo@syrmia.com>, Halil Pasic <pasic@linux.ibm.com>

There is a newer version of this series

From: Xiaoyao Li <xiaoyao.li@intel.com> 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 <xiaoyao.li@intel.com> Message-Id: <20200716082019.215316-2-xiaoyao.li@intel.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> --- 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 *cpu) uint64_t mask; if (!(env->features[FEAT_1_ECX] & CPUID_EXT_XSAVE)) { + env->features[FEAT_XSAVE_COMP_LO] = 0; + env->features[FEAT_XSAVE_COMP_HI] = 0; return; } -- 2.26.2