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author | Paolo Bonzini <pbonzini@redhat.com> | 2022-01-25 11:11:30 -0500 |
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committer | Paolo Bonzini <pbonzini@redhat.com> | 2022-02-10 13:47:12 -0500 |
commit | 068f7ea61895ffc909a387c92a6a8aa8b70dd9dd (patch) | |
tree | 734f0769aa6c4eb1a8f6cce0c64b4804c0b9ff4d /arch/x86/kvm/svm/sev.c | |
parent | 98242dcafe5ec185014f59feb44c70189319841f (diff) | |
download | linux-068f7ea61895ffc909a387c92a6a8aa8b70dd9dd.tar.bz2 |
KVM: SVM: improve split between svm_prepare_guest_switch and sev_es_prepare_guest_switch
KVM performs the VMSAVE to the host save area for both regular and SEV-ES
guests, so hoist it up to svm_prepare_guest_switch. And because
sev_es_prepare_guest_switch does not really need to know the details
of struct svm_cpu_data *, just pass it the pointer to the host save area
inside the HSAVE page.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/svm/sev.c')
-rw-r--r-- | arch/x86/kvm/svm/sev.c | 12 |
1 files changed, 4 insertions, 8 deletions
diff --git a/arch/x86/kvm/svm/sev.c b/arch/x86/kvm/svm/sev.c index 17b53457d866..b82eeef89a3e 100644 --- a/arch/x86/kvm/svm/sev.c +++ b/arch/x86/kvm/svm/sev.c @@ -2907,20 +2907,16 @@ void sev_es_vcpu_reset(struct vcpu_svm *svm) sev_enc_bit)); } -void sev_es_prepare_guest_switch(struct vcpu_svm *svm, unsigned int cpu) +void sev_es_prepare_guest_switch(struct vmcb_save_area *hostsa) { - struct svm_cpu_data *sd = per_cpu(svm_data, cpu); - struct vmcb_save_area *hostsa; - /* * As an SEV-ES guest, hardware will restore the host state on VMEXIT, - * of which one step is to perform a VMLOAD. Since hardware does not - * perform a VMSAVE on VMRUN, the host savearea must be updated. + * of which one step is to perform a VMLOAD. KVM performs the + * corresponding VMSAVE in svm_prepare_guest_switch for both + * traditional and SEV-ES guests. */ - vmsave(__sme_page_pa(sd->save_area)); /* XCR0 is restored on VMEXIT, save the current host value */ - hostsa = (struct vmcb_save_area *)(page_address(sd->save_area) + 0x400); hostsa->xcr0 = xgetbv(XCR_XFEATURE_ENABLED_MASK); /* PKRU is restored on VMEXIT, save the current host value */ |