2018-05-16 5:56 GMT+08:00 Jim Mattson <jmattson@xxxxxxxxxx>: > I'd prefer to let the kvm module have the final say as to whether or > not to allow userspace to do this. I have an IRC discussion with Paolo, it seems that he didn't like the original idea of the patchset. Regards, Wanpeng Li > > On Fri, May 11, 2018 at 8:43 AM, Konrad Rzeszutek Wilk > <konrad.wilk@xxxxxxxxxx> wrote: >> On Fri, May 11, 2018 at 11:42:46AM -0400, Konrad Rzeszutek Wilk wrote: >>> On Mon, Apr 16, 2018 at 10:46:01PM -0700, Wanpeng Li wrote: >>> > From: Wanpeng Li <wanpengli@xxxxxxxxxxx> >>> > >>> > Allow to disable ioport intercept by userspace. >>> > >>> > Cc: Paolo Bonzini <pbonzini@xxxxxxxxxx> >>> > Cc: Radim Krčmář <rkrcmar@xxxxxxxxxx> >>> > Cc: Tim Shearer <tshearer@xxxxxxxxxxxxxxx> >>> > Cc: Liran Alon <liran.alon@xxxxxxxxxx> >>> > Signed-off-by: Wanpeng Li <wanpengli@xxxxxxxxxxx> >>> > --- >>> > Documentation/virtual/kvm/api.txt | 11 +++++++++++ >>> > arch/x86/include/asm/kvm_host.h | 2 ++ >>> > arch/x86/kvm/x86.c | 5 +++++ >>> > include/uapi/linux/kvm.h | 1 + >>> > 4 files changed, 19 insertions(+) >>> > >>> > diff --git a/Documentation/virtual/kvm/api.txt b/Documentation/virtual/kvm/api.txt >>> > index 1c7958b..3d0488e 100644 >>> > --- a/Documentation/virtual/kvm/api.txt >>> > +++ b/Documentation/virtual/kvm/api.txt >>> > @@ -4378,6 +4378,17 @@ all such vmexits. >>> > >>> > Do not enable KVM_FEATURE_PV_UNHALT if you disable HLT exits. >>> > >>> > +7.14 KVM_CAP_IOPORT_DISABLE_INTERCEPT >>> > + >>> > +Architectures: x86 >> >> And to be exact: Intel only..
