kvm/fpu: Enable eager restore kvm FPU for MPX

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The MPX feature requires eager KVM FPU restore support. We have verified
that MPX cannot work correctly with the current lazy KVM FPU restore
mechanism. Eager KVM FPU restore should be enabled if the MPX feature is
exposed to VM.

Signed-off-by: Yang Zhang <yang.z.zhang@intel.com>
Signed-off-by: Liang Li <liang.z.li@intel.com>
[Also activate the FPU on AMD processors. - Paolo]
Cc: stable@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

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This commit is contained in:

Liang Li 2015-05-21 04:41:25 +08:00 • committed by Paolo Bonzini

parent 0fdd74f778

commit c447e76b4c

4 changed files with 27 additions and 2 deletions

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1

arch/x86/include/asm/kvm_host.h

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4

arch/x86/kvm/cpuid.c

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8

arch/x86/kvm/cpuid.h

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16

arch/x86/kvm/x86.c

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