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| author | Tom Lendacky <thomas.lendacky@amd.com> | 2016-11-23 20:01:50 +0300 |
|---|---|---|
| committer | Radim Krčmář <rkrcmar@redhat.com> | 2016-11-24 20:32:45 +0300 |
| commit | 8370c3d08bd98576d97514eca29970e03767a5d1 (patch) | |
| tree | ca70044682b56035b3e0a133d49f79202a5f95cb /arch/x86/kvm/svm.c | |
| parent | 147277540bbc54119172481c8ef6d930cc9fbfc2 (diff) | |
| download | linux-8370c3d08bd98576d97514eca29970e03767a5d1.tar.xz | |
kvm: svm: Add kvm_fast_pio_in support
Update the I/O interception support to add the kvm_fast_pio_in function
to speed up the in instruction similar to the out instruction.
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: Radim Krčmář <rkrcmar@redhat.com>
Diffstat (limited to 'arch/x86/kvm/svm.c')
| -rw-r--r-- | arch/x86/kvm/svm.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c index 4e462bb85723..5e64e656103c 100644 --- a/arch/x86/kvm/svm.c +++ b/arch/x86/kvm/svm.c @@ -2270,7 +2270,7 @@ static int io_interception(struct vcpu_svm *svm) ++svm->vcpu.stat.io_exits; string = (io_info & SVM_IOIO_STR_MASK) != 0; in = (io_info & SVM_IOIO_TYPE_MASK) != 0; - if (string || in) + if (string) return emulate_instruction(vcpu, 0) == EMULATE_DONE; port = io_info >> 16; @@ -2278,7 +2278,8 @@ static int io_interception(struct vcpu_svm *svm) svm->next_rip = svm->vmcb->control.exit_info_2; skip_emulated_instruction(&svm->vcpu); - return kvm_fast_pio_out(vcpu, size, port); + return in ? kvm_fast_pio_in(vcpu, size, port) + : kvm_fast_pio_out(vcpu, size, port); } static int nmi_interception(struct vcpu_svm *svm) |