On Wed, Feb 01, 2023 at 11:42:46AM -0700, Alex Williamson wrote:
> > 'p2p off' is a valuable option in its own right because this stuff
> > doesn't work reliably and is actively dangerous. Did you know you can
> > hard crash the bare metal from a guest on some platforms with P2P
> > operations? Yi
On Wed, 1 Feb 2023 13:28:40 -0400
Jason Gunthorpe wrote:
> On Tue, Jan 31, 2023 at 09:15:03PM -0700, Alex Williamson wrote:
>
> > > IMHO this is generally the way forward to do multi-device as well,
> > > remove the MMIO from all the address maps: VFIO, SW access, all of
> > > them. Nothing can
On Tue, Jan 31, 2023 at 09:15:03PM -0700, Alex Williamson wrote:
> > IMHO this is generally the way forward to do multi-device as well,
> > remove the MMIO from all the address maps: VFIO, SW access, all of
> > them. Nothing can touch MMIO except for the vCPU.
>
> Are you suggesting this relative
On Tue, 31 Jan 2023 19:29:48 -0400
Jason Gunthorpe wrote:
> On Tue, Jan 31, 2023 at 03:43:01PM -0700, Alex Williamson wrote:
>
> > How does this affect our path towards supported migration? I'm
> > thinking about a user experience where QEMU supports migration if
> > device A OR device B are at
On Tue, Jan 31, 2023 at 03:43:01PM -0700, Alex Williamson wrote:
> How does this affect our path towards supported migration? I'm
> thinking about a user experience where QEMU supports migration if
> device A OR device B are attached, but not devices A and B attached to
> the same VM. We might h
On Tue, 31 Jan 2023 14:44:54 +0200
Avihai Horon wrote:
> On 27/01/2023 1:52, Alex Williamson wrote:
> > External email: Use caution opening links or attachments
> >
> >
> > On Thu, 26 Jan 2023 20:49:31 +0200
> > Avihai Horon wrote:
> >
> >> Pre-copy support allows the VFIO device data to be tr
On 27/01/2023 1:52, Alex Williamson wrote:
External email: Use caution opening links or attachments
On Thu, 26 Jan 2023 20:49:31 +0200
Avihai Horon wrote:
Pre-copy support allows the VFIO device data to be transferred while the
VM is running. This helps to accommodate VFIO devices that hav
On Thu, 26 Jan 2023 20:49:31 +0200
Avihai Horon wrote:
> Pre-copy support allows the VFIO device data to be transferred while the
> VM is running. This helps to accommodate VFIO devices that have a large
> amount of data that needs to be transferred, and it can reduce migration
> downtime.
>
> P
Pre-copy support allows the VFIO device data to be transferred while the
VM is running. This helps to accommodate VFIO devices that have a large
amount of data that needs to be transferred, and it can reduce migration
downtime.
Pre-copy support is optional in VFIO migration protocol v2.
Implement
