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| author | Tom Lendacky <thomas.lendacky@amd.com> | 2016-12-14 14:59:23 -0500 |
|---|---|---|
| committer | Radim Krčmář <rkrcmar@redhat.com> | 2017-01-09 14:47:58 +0100 |
| commit | 0f89b207b04a1a399e19d35293658e3a571da3d7 (patch) | |
| tree | c2552c3c7a7a33564c36b4e469c9da7191fe5836 /arch/x86/include/asm/kvm_host.h | |
| parent | 5bd5db385b3e13c702365574c0b7350c6ea45e84 (diff) | |
| download | linux-next-0f89b207b04a1a399e19d35293658e3a571da3d7.tar.gz | |
kvm: svm: Use the hardware provided GPA instead of page walk
When a guest causes a NPF which requires emulation, KVM sometimes walks
the guest page tables to translate the GVA to a GPA. This is unnecessary
most of the time on AMD hardware since the hardware provides the GPA in
EXITINFO2.
The only exception cases involve string operations involving rep or
operations that use two memory locations. With rep, the GPA will only be
the value of the initial NPF and with dual memory locations we won't know
which memory address was translated into EXITINFO2.
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Reviewed-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/include/asm/kvm_host.h')
| -rw-r--r-- | arch/x86/include/asm/kvm_host.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h index 99a71d90b6ae..0419e114f27b 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -675,6 +675,9 @@ struct kvm_vcpu_arch { int pending_ioapic_eoi; int pending_external_vector; + + /* GPA available (AMD only) */ + bool gpa_available; }; struct kvm_lpage_info { |