diff options
| author |   David Woodhouse <dwmw@amazon.co.uk> | 2021-11-15 16:50:24 +0000 |
|---|---|---|
| committer |   Paolo Bonzini <pbonzini@redhat.com> | 2021-11-18 02:03:42 -0500 |
| commit | 297d597a6da38fc1b40fa470044a767e33801438 (patch) | |
| tree | 2e2dc3f57800afdbab61ba690c3d6df7a684e0ad /arch/x86/kvm/vmx/vmx.h | |
| parent | KVM: x86/xen: Fix get_attr of KVM_XEN_ATTR_TYPE_SHARED_INFO (diff) | |
| download | linux-dev-297d597a6da38fc1b40fa470044a767e33801438.tar.xz linux-dev-297d597a6da38fc1b40fa470044a767e33801438.zip | |
KVM: nVMX: Use kvm_{read,write}_guest_cached() for shadow_vmcs12
Using kvm_vcpu_map() for reading from the guest is entirely gratuitous,
when all we do is a single memcpy and unmap it again. Fix it up to use
kvm_read_guest()... but in fact I couldn't bring myself to do that
without also making it use a gfn_to_hva_cache for both that *and* the
copy in the other direction.
Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Message-Id: <20211115165030.7422-5-dwmw2@infradead.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to '')
| -rw-r--r-- | arch/x86/kvm/vmx/vmx.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/x86/kvm/vmx/vmx.h b/arch/x86/kvm/vmx/vmx.h index a4ead6023133..cdadbd5dc0ca 100644 --- a/arch/x86/kvm/vmx/vmx.h +++ b/arch/x86/kvm/vmx/vmx.h @@ -142,6 +142,11 @@ struct nested_vmx { struct vmcs12 *cached_shadow_vmcs12; /* + * GPA to HVA cache for accessing vmcs12->vmcs_link_pointer + */ + struct gfn_to_hva_cache shadow_vmcs12_cache; + + /* * Indicates if the shadow vmcs or enlightened vmcs must be updated * with the data held by struct vmcs12. */ |