Re: [RFC] /dev/ioasid uAPI proposal

[Christoph Hellwig]

On Mon, Jun 07, 2021 at 04:08:02PM -0300, Jason Gunthorpe wrote:
> Compatibility is important, but when I look in the kernel code I see
> very few places that call wbinvd(). Basically all DRM for something
> relavent to qemu.
> 
> That tells me that the vast majority of PCI devices do not generate
> no-snoop traffic.

Part of it is that we have no general API for it, because the DRM folks
as usual just tarted piling up local hacks instead of introducing
a proper API..