On Mon, Feb 14, 2022 at 3:05 PM Peter Xu wrote:
>
> On Mon, Feb 14, 2022 at 02:40:20PM +0800, Jason Wang wrote:
> > Or we can do tricks like checking IOMMU_NOTIFIER_DEVIOTLB_UNMAP and
> > assume it's vhost.
> >
> > But I'm not sure it's worth it.
>
> If not any use, then probably not at all. :-)
On Mon, Feb 14, 2022 at 02:40:20PM +0800, Jason Wang wrote:
> Or we can do tricks like checking IOMMU_NOTIFIER_DEVIOTLB_UNMAP and
> assume it's vhost.
>
> But I'm not sure it's worth it.
If not any use, then probably not at all. :-)
--
Peter Xu
On Mon, Feb 14, 2022 at 2:35 PM Jason Wang wrote:
>
> On Mon, Feb 14, 2022 at 2:31 PM Peter Xu wrote:
> >
> > On Mon, Feb 14, 2022 at 02:03:46PM +0800, Jason Wang wrote:
> > > SC is required for some kernel features like vhost-vDPA. So this patch
> > > implements basic SC feature. The idea is
On Mon, Feb 14, 2022 at 02:35:18PM +0800, Jason Wang wrote:
> On Mon, Feb 14, 2022 at 2:31 PM Peter Xu wrote:
> >
> > On Mon, Feb 14, 2022 at 02:03:46PM +0800, Jason Wang wrote:
> > > SC is required for some kernel features like vhost-vDPA. So this patch
> > > implements basic SC feature. The
On Mon, Feb 14, 2022 at 2:31 PM Peter Xu wrote:
>
> On Mon, Feb 14, 2022 at 02:03:46PM +0800, Jason Wang wrote:
> > SC is required for some kernel features like vhost-vDPA. So this patch
> > implements basic SC feature. The idea is pretty simple, for software
> > emulated DMA it would be always
On Mon, Feb 14, 2022 at 02:03:46PM +0800, Jason Wang wrote:
> SC is required for some kernel features like vhost-vDPA. So this patch
> implements basic SC feature. The idea is pretty simple, for software
> emulated DMA it would be always coherent. In this case we can simple
> advertise ECAP_SC
SC is required for some kernel features like vhost-vDPA. So this patch
implements basic SC feature. The idea is pretty simple, for software
emulated DMA it would be always coherent. In this case we can simple
advertise ECAP_SC bit. For VFIO and vhost, thing will be more much
complicated, so this
