> From: Chia-I Wu
> Sent: Saturday, February 22, 2020 2:21 AM
>
> On Fri, Feb 21, 2020 at 7:59 AM Sean Christopherson
> wrote:
> >
> > On Thu, Feb 20, 2020 at 09:39:05PM -0800, Tian, Kevin wrote:
> > > > From: Chia-I Wu
> > > > Sent: Friday, February 21, 2020 12:51 PM
> > > > If you think it
Hi,
> > The plan is for virtio-gpu device to reserve a huge memory region in
> > the guest. Memslots may be added dynamically or statically to back
> > the region.
>
> so the region is marked as E820_RESERVED to prevent guest kernel
> from using it for other purpose and then virtio-gpu
On Fri, Feb 21, 2020 at 7:59 AM Sean Christopherson
wrote:
>
> On Thu, Feb 20, 2020 at 09:39:05PM -0800, Tian, Kevin wrote:
> > > From: Chia-I Wu
> > > Sent: Friday, February 21, 2020 12:51 PM
> > > If you think it is the best for KVM to inspect hva to determine the memory
> > > type with page
On Thu, Feb 20, 2020 at 09:39:05PM -0800, Tian, Kevin wrote:
> > From: Chia-I Wu
> > Sent: Friday, February 21, 2020 12:51 PM
> > If you think it is the best for KVM to inspect hva to determine the memory
> > type with page granularity, that is reasonable and should work for us too.
> > The
> From: Chia-I Wu
> Sent: Friday, February 21, 2020 12:51 PM
>
> (resend because gmail did not format to plain text...)
>
> On Thu, Feb 20, 2020 at 8:45 PM Chia-I Wu wrote:
> >
> >
> >
> > On Thu, Feb 20, 2020 at 4:23 PM Tian, Kevin wrote:
> >>
> >> > From: Chia-I Wu
> >> > Sent: Friday,
(resend because gmail did not format to plain text...)
On Thu, Feb 20, 2020 at 8:45 PM Chia-I Wu wrote:
>
>
>
> On Thu, Feb 20, 2020 at 4:23 PM Tian, Kevin wrote:
>>
>> > From: Chia-I Wu
>> > Sent: Friday, February 21, 2020 6:24 AM
>> >
>> > On Wed, Feb 19, 2020 at 6:38 PM Tian, Kevin wrote:
On Thu, Feb 20, 2020 at 4:23 PM Tian, Kevin wrote:
> > From: Chia-I Wu
> > Sent: Friday, February 21, 2020 6:24 AM
> >
> > On Wed, Feb 19, 2020 at 6:38 PM Tian, Kevin
> wrote:
> > >
> > > > From: Tian, Kevin
> > > > Sent: Thursday, February 20, 2020 10:05 AM
> > > >
> > > > > From: Chia-I Wu
> From: Chia-I Wu
> Sent: Friday, February 21, 2020 6:24 AM
>
> On Wed, Feb 19, 2020 at 6:38 PM Tian, Kevin wrote:
> >
> > > From: Tian, Kevin
> > > Sent: Thursday, February 20, 2020 10:05 AM
> > >
> > > > From: Chia-I Wu
> > > > Sent: Thursday, February 20, 2020 3:37 AM
> > > >
> > > > On
On Wed, Feb 19, 2020 at 6:13 PM Tian, Kevin wrote:
> > > Curious... How is such slot exposed to the guest? A reserved memory
> > > region? Is it static or might be dynamically added?
> > The plan is for virtio-gpu device to reserve a huge memory region in
> > the guest. Memslots may be added
On Wed, Feb 19, 2020 at 6:38 PM Tian, Kevin wrote:
>
> > From: Tian, Kevin
> > Sent: Thursday, February 20, 2020 10:05 AM
> >
> > > From: Chia-I Wu
> > > Sent: Thursday, February 20, 2020 3:37 AM
> > >
> > > On Wed, Feb 19, 2020 at 1:52 AM Tian, Kevin wrote:
> > > >
> > > > > From: Paolo
> From: Tian, Kevin
> Sent: Thursday, February 20, 2020 10:05 AM
>
> > From: Chia-I Wu
> > Sent: Thursday, February 20, 2020 3:37 AM
> >
> > On Wed, Feb 19, 2020 at 1:52 AM Tian, Kevin wrote:
> > >
> > > > From: Paolo Bonzini
> > > > Sent: Wednesday, February 19, 2020 12:29 AM
> > > >
> > > >
> From: Chia-I Wu
> Sent: Thursday, February 20, 2020 3:18 AM
>
> On Wed, Feb 19, 2020 at 2:00 AM Tian, Kevin wrote:
> >
> > > From: Chia-I Wu
> > > Sent: Saturday, February 15, 2020 5:15 AM
> > >
> > > On Fri, Feb 14, 2020 at 2:26 AM Paolo Bonzini
> wrote:
> > > >
> > > > On 13/02/20 23:18,
> From: Chia-I Wu
> Sent: Thursday, February 20, 2020 3:37 AM
>
> On Wed, Feb 19, 2020 at 1:52 AM Tian, Kevin wrote:
> >
> > > From: Paolo Bonzini
> > > Sent: Wednesday, February 19, 2020 12:29 AM
> > >
> > > On 14/02/20 23:03, Sean Christopherson wrote:
> > > >> On Fri, Feb 14, 2020 at 1:47 PM
On Wed, Feb 19, 2020 at 1:52 AM Tian, Kevin wrote:
>
> > From: Paolo Bonzini
> > Sent: Wednesday, February 19, 2020 12:29 AM
> >
> > On 14/02/20 23:03, Sean Christopherson wrote:
> > >> On Fri, Feb 14, 2020 at 1:47 PM Chia-I Wu wrote:
> > >>> AFAICT, it is currently allowed on ARM (verified) and
On Wed, Feb 19, 2020 at 2:00 AM Tian, Kevin wrote:
>
> > From: Chia-I Wu
> > Sent: Saturday, February 15, 2020 5:15 AM
> >
> > On Fri, Feb 14, 2020 at 2:26 AM Paolo Bonzini wrote:
> > >
> > > On 13/02/20 23:18, Chia-I Wu wrote:
> > > >
> > > > The bug you mentioned was probably this one
> > > >
> From: Chia-I Wu
> Sent: Saturday, February 15, 2020 5:15 AM
>
> On Fri, Feb 14, 2020 at 2:26 AM Paolo Bonzini wrote:
> >
> > On 13/02/20 23:18, Chia-I Wu wrote:
> > >
> > > The bug you mentioned was probably this one
> > >
> > > https://bugzilla.kernel.org/show_bug.cgi?id=104091
> >
> > Yes,
> From: Paolo Bonzini
> Sent: Wednesday, February 19, 2020 12:29 AM
>
> On 14/02/20 23:03, Sean Christopherson wrote:
> >> On Fri, Feb 14, 2020 at 1:47 PM Chia-I Wu wrote:
> >>> AFAICT, it is currently allowed on ARM (verified) and AMD (not
> >>> verified, but svm_get_mt_mask returns 0 which
On Tue, Feb 18, 2020 at 05:28:51PM +0100, Paolo Bonzini wrote:
> On 14/02/20 23:03, Sean Christopherson wrote:
> >> On Fri, Feb 14, 2020 at 1:47 PM Chia-I Wu wrote:
> >>> AFAICT, it is currently allowed on ARM (verified) and AMD (not
> >>> verified, but svm_get_mt_mask returns 0 which supposedly
On 14/02/20 23:03, Sean Christopherson wrote:
>> On Fri, Feb 14, 2020 at 1:47 PM Chia-I Wu wrote:
>>> AFAICT, it is currently allowed on ARM (verified) and AMD (not
>>> verified, but svm_get_mt_mask returns 0 which supposedly means the NPT
>>> does not restrict what the guest PAT can do). This
On Fri, Feb 14, 2020 at 01:56:48PM -0800, Jim Mattson wrote:
> On Fri, Feb 14, 2020 at 1:47 PM Chia-I Wu wrote:
> > AFAICT, it is currently allowed on ARM (verified) and AMD (not
> > verified, but svm_get_mt_mask returns 0 which supposedly means the NPT
> > does not restrict what the guest PAT
On Fri, Feb 14, 2020 at 11:52 AM Sean Christopherson
wrote:
>
> On Fri, Feb 14, 2020 at 11:26:06AM +0100, Paolo Bonzini wrote:
> > On 13/02/20 23:18, Chia-I Wu wrote:
> > >
> > > The bug you mentioned was probably this one
> > >
> > > https://bugzilla.kernel.org/show_bug.cgi?id=104091
> >
> >
On Fri, Feb 14, 2020 at 2:26 AM Paolo Bonzini wrote:
>
> On 13/02/20 23:18, Chia-I Wu wrote:
> >
> > The bug you mentioned was probably this one
> >
> > https://bugzilla.kernel.org/show_bug.cgi?id=104091
>
> Yes, indeed.
>
> > From what I can tell, the commit allowed the guests to create cached
On Fri, Feb 14, 2020 at 11:26:06AM +0100, Paolo Bonzini wrote:
> On 13/02/20 23:18, Chia-I Wu wrote:
> >
> > The bug you mentioned was probably this one
> >
> > https://bugzilla.kernel.org/show_bug.cgi?id=104091
>
> Yes, indeed.
>
> > From what I can tell, the commit allowed the guests to
On 13/02/20 23:18, Chia-I Wu wrote:
>
> The bug you mentioned was probably this one
>
> https://bugzilla.kernel.org/show_bug.cgi?id=104091
Yes, indeed.
> From what I can tell, the commit allowed the guests to create cached
> mappings to MMIO regions and caused MCEs. That is different than
On Thu, Feb 13, 2020 at 1:41 PM Paolo Bonzini wrote:
>
> On 13/02/20 22:30, Chia-I Wu wrote:
> > Hi,
> >
> > Host GPU drivers like to give userspace WC mapping. When the userspace
> > makes
> > the mapping available to a guest, it also tells the guest to create a WC
> > mapping. However, even
On 13/02/20 22:30, Chia-I Wu wrote:
> Hi,
>
> Host GPU drivers like to give userspace WC mapping. When the userspace makes
> the mapping available to a guest, it also tells the guest to create a WC
> mapping. However, even when the guest kernel picks the correct memory type,
> it gets ignored
Hi,
Host GPU drivers like to give userspace WC mapping. When the userspace makes
the mapping available to a guest, it also tells the guest to create a WC
mapping. However, even when the guest kernel picks the correct memory type,
it gets ignored because of VMX_EPT_IPAT_BIT on Intel.
This
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