lkml.org 
[lkml]   [2018]   [May]   [15]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Date
SubjectRe: [PATCH 2/3] KVM: X86: Allow userspace to disable ioport intercept
2018-05-16 5:56 GMT+08:00 Jim Mattson <jmattson@google.com>:
> 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@oracle.com> 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@tencent.com>
>>> >
>>> > Allow to disable ioport intercept by userspace.
>>> >
>>> > Cc: Paolo Bonzini <pbonzini@redhat.com>
>>> > Cc: Radim Krčmář <rkrcmar@redhat.com>
>>> > Cc: Tim Shearer <tshearer@advaoptical.com>
>>> > Cc: Liran Alon <liran.alon@oracle.com>
>>> > Signed-off-by: Wanpeng Li <wanpengli@tencent.com>
>>> > ---
>>> > 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..

\
 
 \ /
  Last update: 2018-05-16 03:13    [W:0.092 / U:5.212 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site