Re: [PATCH 4/5] vfio/type1: Flush CPU caches on DMA pages in non-coherent domains

Jason Gunthorpe
2024-05-22T16:52:27Z

On Wed, May 22, 2024 at 08:43:18AM -0600, Alex Williamson wrote:

> But I think this also means that regardless of virtualizing
> PCI_EXP_DEVCTL_NOSNOOP_EN, there will be momentary gaps around device
> resets where a device could legitimately perform no-snoop
> transactions.

Isn't memory enable turned off after FLR? If not do we have to make it
off before doing FLR?

I'm not sure how a no-snoop could leak out around FLR?

Jason