KVM: SVM: Guest FPU state save/restore not needed for SEV-ES guest

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The guest FPU state is automatically restored on VMRUN and saved on VMEXIT
by the hardware, so there is no reason to do this in KVM. Eliminate the
allocation of the guest_fpu save area and key off that to skip operations
related to the guest FPU state.

Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Message-Id: <173e429b4d0d962c6a443c4553ffdaf31b7665a4.1607620209.git.thomas.lendacky@amd.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

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Tom Lendacky 2020-12-10 11:10:01 -06:00 • committed by Paolo Bonzini

parent 5719455fbd

commit ed02b21309

3 changed files with 56 additions and 10 deletions

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2

arch/x86/include/asm/kvm_host.h

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8

arch/x86/kvm/svm/svm.c

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56

arch/x86/kvm/x86.c

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