On Thu, Aug 17, 2017 at 03:51:31PM +0200, Radim Krčmář wrote:
> 2017-08-17 01:31+0300, Michael S. Tsirkin:
> > On Wed, Aug 16, 2017 at 11:25:35PM +0200, Paolo Bonzini wrote:
> > > On 16/08/2017 21:59, Michael S. Tsirkin wrote:
> > > > On Wed, Aug 16, 2017 at 09:03:17PM +0200, Radim Krčmář wrote:
>
On Thu, Aug 17, 2017 at 11:00:01AM +0200, Paolo Bonzini wrote:
> >> and also not a page table walk---just in case.
> >
> > I still don't get it, sorry. Let's assume for the sake of argument
> > that it's a PT walk causing the MMIO access. Just why do you think
> > that it makes sense to skip the i
2017-08-17 01:31+0300, Michael S. Tsirkin:
> On Wed, Aug 16, 2017 at 11:25:35PM +0200, Paolo Bonzini wrote:
> > On 16/08/2017 21:59, Michael S. Tsirkin wrote:
> > > On Wed, Aug 16, 2017 at 09:03:17PM +0200, Radim Krčmář wrote:
> > how about we blacklist nested virt for this optimization?
> > >
2017-08-17 14:14+0200, Paolo Bonzini:
> On 17/08/2017 11:00, Paolo Bonzini wrote:
> > On 17/08/2017 00:31, Michael S. Tsirkin wrote:
> >> On Wed, Aug 16, 2017 at 11:25:35PM +0200, Paolo Bonzini wrote:
> >>> Yes, I agree. EMULTYPE_SKIP is fine because failed decoding still
> >>> causes an exception
On 17/08/2017 11:00, Paolo Bonzini wrote:
> On 17/08/2017 00:31, Michael S. Tsirkin wrote:
>> On Wed, Aug 16, 2017 at 11:25:35PM +0200, Paolo Bonzini wrote:
>>> Yes, I agree. EMULTYPE_SKIP is fine because failed decoding still
>>> causes an exception to be injected. Maybe it's better to gate the
On 17/08/2017 00:31, Michael S. Tsirkin wrote:
> On Wed, Aug 16, 2017 at 11:25:35PM +0200, Paolo Bonzini wrote:
>> Yes, I agree. EMULTYPE_SKIP is fine because failed decoding still
>> causes an exception to be injected. Maybe it's better to gate the
>> EMULTYPE_SKIP emulation on the exit qualific
On 16.08.2017 14:07, Radim Krčmář wrote:
> 2017-08-16 13:22+0200, Paolo Bonzini:
>> Microsoft pointed out privately to me that KVM's handling of
>> KVM_FAST_MMIO_BUS is invalid. Using skip_emulation_instruction is invalid
>> in EPT misconfiguration vmexit handlers, because neither EPT violations
>
On Wed, Aug 16, 2017 at 11:25:35PM +0200, Paolo Bonzini wrote:
> On 16/08/2017 21:59, Michael S. Tsirkin wrote:
> > On Wed, Aug 16, 2017 at 09:03:17PM +0200, Radim Krčmář wrote:
> >> 2017-08-16 19:19+0200, Paolo Bonzini:
> >>> On 16/08/2017 18:50, Michael S. Tsirkin wrote:
> On Wed, Aug 16, 20
On 16/08/2017 21:59, Michael S. Tsirkin wrote:
> On Wed, Aug 16, 2017 at 09:03:17PM +0200, Radim Krčmář wrote:
>> 2017-08-16 19:19+0200, Paolo Bonzini:
>>> On 16/08/2017 18:50, Michael S. Tsirkin wrote:
On Wed, Aug 16, 2017 at 03:30:31PM +0200, Paolo Bonzini wrote:
> While you can filter o
On Wed, Aug 16, 2017 at 09:03:17PM +0200, Radim Krčmář wrote:
> 2017-08-16 19:19+0200, Paolo Bonzini:
> > On 16/08/2017 18:50, Michael S. Tsirkin wrote:
> >> On Wed, Aug 16, 2017 at 03:30:31PM +0200, Paolo Bonzini wrote:
> >>> While you can filter out instruction fetches, that's not enough. A data
On Wed, Aug 16, 2017 at 07:19:28PM +0200, Paolo Bonzini wrote:
> On 16/08/2017 18:50, Michael S. Tsirkin wrote:
> > On Wed, Aug 16, 2017 at 03:30:31PM +0200, Paolo Bonzini wrote:
> >> While you can filter out instruction fetches, that's not enough. A data
> >> read could happen because someone poi
2017-08-16 19:19+0200, Paolo Bonzini:
> On 16/08/2017 18:50, Michael S. Tsirkin wrote:
>> On Wed, Aug 16, 2017 at 03:30:31PM +0200, Paolo Bonzini wrote:
>>> While you can filter out instruction fetches, that's not enough. A data
>>> read could happen because someone pointed the IDT to MMIO area, a
On 16/08/2017 18:50, Michael S. Tsirkin wrote:
> On Wed, Aug 16, 2017 at 03:30:31PM +0200, Paolo Bonzini wrote:
>> While you can filter out instruction fetches, that's not enough. A data
>> read could happen because someone pointed the IDT to MMIO area, and who
>> knows what the VM-exit instructio
On Wed, Aug 16, 2017 at 03:30:31PM +0200, Paolo Bonzini wrote:
> On 16/08/2017 15:16, Michael S. Tsirkin wrote:
> > On Wed, Aug 16, 2017 at 03:05:51PM +0200, Paolo Bonzini wrote:
> >> On 16/08/2017 14:58, Michael S. Tsirkin wrote:
> >>> On Wed, Aug 16, 2017 at 01:22:49PM +0200, Paolo Bonzini wrote:
> We actually know what to expect (a write) so we could maybe
> optimize this some more with a dedicated function just for this.
We don't know the addressing mode, the size or the source (immediate
vs. register), so no.
KVM is already doing a single translation and read no matter how long
the in
On Wed, Aug 16, 2017 at 03:37:47PM +0200, Paolo Bonzini wrote:
> On 16/08/2017 14:07, Radim Krčmář wrote:
> > 2017-08-16 13:22+0200, Paolo Bonzini:
> >> Microsoft pointed out privately to me that KVM's handling of
> >> KVM_FAST_MMIO_BUS is invalid. Using skip_emulation_instruction is invalid
> >>
On Wed, Aug 16, 2017 at 03:30:31PM +0200, Paolo Bonzini wrote:
> On 16/08/2017 15:16, Michael S. Tsirkin wrote:
> > On Wed, Aug 16, 2017 at 03:05:51PM +0200, Paolo Bonzini wrote:
> >> On 16/08/2017 14:58, Michael S. Tsirkin wrote:
> >>> On Wed, Aug 16, 2017 at 01:22:49PM +0200, Paolo Bonzini wrote:
On 16/08/2017 14:07, Radim Krčmář wrote:
> 2017-08-16 13:22+0200, Paolo Bonzini:
>> Microsoft pointed out privately to me that KVM's handling of
>> KVM_FAST_MMIO_BUS is invalid. Using skip_emulation_instruction is invalid
>> in EPT misconfiguration vmexit handlers, because neither EPT violations
>
On 16/08/2017 15:16, Michael S. Tsirkin wrote:
> On Wed, Aug 16, 2017 at 03:05:51PM +0200, Paolo Bonzini wrote:
>> On 16/08/2017 14:58, Michael S. Tsirkin wrote:
>>> On Wed, Aug 16, 2017 at 01:22:49PM +0200, Paolo Bonzini wrote:
Microsoft pointed out privately to me that KVM's handling of
On Wed, Aug 16, 2017 at 03:05:51PM +0200, Paolo Bonzini wrote:
> On 16/08/2017 14:58, Michael S. Tsirkin wrote:
> > On Wed, Aug 16, 2017 at 01:22:49PM +0200, Paolo Bonzini wrote:
> >> Microsoft pointed out privately to me that KVM's handling of
> >> KVM_FAST_MMIO_BUS is invalid. Using skip_emulati
On 16/08/2017 14:58, Michael S. Tsirkin wrote:
> On Wed, Aug 16, 2017 at 01:22:49PM +0200, Paolo Bonzini wrote:
>> Microsoft pointed out privately to me that KVM's handling of
>> KVM_FAST_MMIO_BUS is invalid. Using skip_emulation_instruction is invalid
>> in EPT misconfiguration vmexit handlers, b
On Wed, Aug 16, 2017 at 01:22:49PM +0200, Paolo Bonzini wrote:
> Microsoft pointed out privately to me that KVM's handling of
> KVM_FAST_MMIO_BUS is invalid. Using skip_emulation_instruction is invalid
> in EPT misconfiguration vmexit handlers, because neither EPT violations
> nor misconfiguration
2017-08-16 13:22+0200, Paolo Bonzini:
> Microsoft pointed out privately to me that KVM's handling of
> KVM_FAST_MMIO_BUS is invalid. Using skip_emulation_instruction is invalid
> in EPT misconfiguration vmexit handlers, because neither EPT violations
> nor misconfigurations are listed in the manua
23 matches
Mail list logo
