RE: [PATCH 3/3] vfio/migration: Make VFIO migration non-experimental

[Shameerali Kolothum Thodi]

> -----Original Message-----
> From: Jason Gunthorpe [mailto:jgg@nvidia.com]
> Sent: 27 June 2023 13:30
> To: Cédric Le Goater <clg@redhat.com>
> Cc: Avihai Horon <avihaih@nvidia.com>; Alex Williamson
> <alex.williamson@redhat.com>; Joao Martins <joao.m.martins@oracle.com>;
> Juan Quintela <quintela@redhat.com>; Peter Xu <peterx@redhat.com>;
> Leonardo Bras <leobras@redhat.com>; Zhenzhong Duan
> <zhenzhong.duan@intel.com>; Yishai Hadas <yishaih@nvidia.com>; Maor
> Gottlieb <maorg@nvidia.com>; Kirti Wankhede <kwankhede@nvidia.com>;
> Tarun Gupta <targupta@nvidia.com>; qemu-devel@nongnu.org; Shameerali
> Kolothum Thodi <shameerali.kolothum.thodi@huawei.com>
> Subject: Re: [PATCH 3/3] vfio/migration: Make VFIO migration
> non-experimental
> 
> On Tue, Jun 27, 2023 at 02:21:55PM +0200, Cédric Le Goater wrote:
> 
> > We have a way to run and migrate a machine with a device not supporting
> > dirty tracking. Only Hisilicon is in that case today. May be there are
> > plans to add dirty tracking support ?
> 
> Hisilicon will eventually use Joao's work for IOMMU based tracking,
> this is what their HW was designed to do.

Yes. The plan is to make use of SMMUv3 HTTU feature for dirty tracking based
on Joao's work here,
https://lore.kernel.org/kvm/20230518204650.14541-1-joao.m.martins@oracle.com/

Thanks,
Shameer