| Message ID | 20150228000422.11892.98236.stgit@joelvmguard2.amd.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
2015-02-27 18:04-0600, Joel Schopp: > From: David Kaplan <David.Kaplan@amd.com> > > We can make the in instruction go faster the same way the out instruction is > already. > > Signed-off-by: David Kaplan <David.Kaplan@amd.com> > [extracted from larger unlrelated patch, forward ported, tested] > Signed-off-by: Joel Schopp <joel.schopp@amd.com> > --- > arch/x86/kvm/svm.c | 4 +++- > 1 file changed, 3 insertions(+), 1 deletion(-) > > diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c > @@ -1907,6 +1907,8 @@ static int io_interception(struct vcpu_svm *svm) > svm->next_rip = svm->vmcb->control.exit_info_2; > skip_emulated_instruction(&svm->vcpu); > > + if (in) > + return kvm_fast_pio_in(vcpu, size, port); Have I missed a patch that defined kvm_fast_pio_in()? Thanks. -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
>> + if (in) >> + return kvm_fast_pio_in(vcpu, size, port); > Have I missed a patch that defined kvm_fast_pio_in()? Not sure how I managed to leave out the bulk of the patch. Resending v2 momentarily. -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c index d319e0c..f8c906b 100644 --- a/arch/x86/kvm/svm.c +++ b/arch/x86/kvm/svm.c @@ -1899,7 +1899,7 @@ 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; @@ -1907,6 +1907,8 @@ static int io_interception(struct vcpu_svm *svm) svm->next_rip = svm->vmcb->control.exit_info_2; skip_emulated_instruction(&svm->vcpu); + if (in) + return kvm_fast_pio_in(vcpu, size, port); return kvm_fast_pio_out(vcpu, size, port); }