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| author | Tom Lendacky <thomas.lendacky@amd.com> | 2020-12-10 11:10:01 -0600 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2020-12-15 05:20:56 -0500 |
| commit | ed02b213098a90c2a415a0da18f05841f8cf0a81 (patch) | |
| tree | 0983564841eec20f81b6484f1a488cce58e37db5 /arch/x86/include | |
| parent | 5719455fbd952a69ebc860d47bb0287e9198fe12 (diff) | |
| download | linux-ed02b213098a90c2a415a0da18f05841f8cf0a81.tar.gz linux-ed02b213098a90c2a415a0da18f05841f8cf0a81.tar.bz2 linux-ed02b213098a90c2a415a0da18f05841f8cf0a81.zip | |
KVM: SVM: Guest FPU state save/restore not needed for SEV-ES guest
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>
Diffstat (limited to 'arch/x86/include')
| -rw-r--r-- | arch/x86/include/asm/kvm_host.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h index 2b6f168436c8..39707e72b062 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -1477,6 +1477,8 @@ void kvm_vcpu_deliver_sipi_vector(struct kvm_vcpu *vcpu, u8 vector); int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int idt_index, int reason, bool has_error_code, u32 error_code); +void kvm_free_guest_fpu(struct kvm_vcpu *vcpu); + void kvm_post_set_cr0(struct kvm_vcpu *vcpu, unsigned long old_cr0, unsigned long cr0); void kvm_post_set_cr4(struct kvm_vcpu *vcpu, unsigned long old_cr4, unsigned long cr4); int kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0); |