On Thu, Feb 27, 2025 at 11:33:31AM +1100, Alexey Kardashevskiy wrote: > > > On 27/2/25 00:12, Jason Gunthorpe wrote: > > On Wed, Feb 26, 2025 at 06:49:18PM +0800, Xu Yilun wrote: > > > > > E.g. I don't think VFIO driver would expect its MMIO access suddenly > > > failed without knowing what happened. > > > > What do people expect to happen here anyhow? Do you still intend to > > mmap any of the MMIO into the hypervisor? No, right? It is all locked > > down? > > This patchset expects it to be mmap'able as this is how MMIO gets mapped in > the NPT and SEV-SNP still works with that (and updates the RMPs on top), the > host os is not expected to access these though. TDX will handle this somehow > different. Thanks, I'm expecting you'll wrap that in a FD, since iommufd will not be accessing MMIO through mmaps. Jason
