On Thu, May 07, 2026 at 05:16:56PM +1000, Alexey Kardashevskiy wrote:

true but either way dmabuf slicing will be directed by QEMU's msix-table emulation MR and this slicing needs to match the TDISP report so I'll have to teach QEMU these reports, right? I am worried if I miss something obvious, again. Thanks,

I don't think so.. It just needs to slice it into the MSI page blindly. When the VM goes to validate the TDISP report against the mappings it will fail to accept the device if there is a mismatch.

The only thing qemu could do is fail sooner, but I don't know that is worth the complexity as we do expect all devices to have their MSI range unprotected.

Jason