A similar issue with a fix submitted below, ccing related people.
https://lists.gnu.org/archive/html/qemu-devel/2023-11/msg02937.html
It looks the fix will not work for hotplug.
Or below qemu cmdline may help:
"-cpu host,host-phys-bits-limit=39"
don't you have the same issue with legacy VFIO code, you should?
I tend to be lazy and use seabios for guests on the command line.
I do see the error with legacy VFIO and uefi.
However, with the address space size work-around and iommufd, the
error is different, an EFAULT now. Some page pinning issue it seems.
Yes, this reminds me of iommufd not supporting p2p mapping yet.
OK. Should we transform this error in a warning ? The code needs
at least a comment.
So EFAULT is expected. Maybe I should add a comment in
docs/devel/vfio-iommufd.rst
Yes. It would be good to have a list of gaps and effects in the
documentation. See Jason's presentation at LPC.
https://lpc.events/event/17/contributions/1418/attachments/1297/2607/LPC2023_iommufd.pdf
Thanks,
C.
