On Tue, Mar 25, 2025 at 02:11:40AM +0000, Suravee Suthikulpanit wrote: > Currently, the QEMU-emulated AMD IOMMU device use PCI vendor id 0x1022 > (AMD) with device id zero (undefined). Eventhough this does not cause any > functional issue for AMD IOMMU driver since it normally uses information > in the ACPI IVRS table to probe and initialize the device per > recommendation in the AMD IOMMU specification, the device id zero causes > the Windows Device Manager utility to show the device as an unknown device. > > Since Windows only recognizes AMD IOMMU device with device id 0x1419 as > listed in the machine.inf file, modify the QEMU AMD IOMMU model to use > the id 0x1419 to avoid the issue. This advertise the IOMMU as the AMD > IOMMU device for Family 15h (Models 10h-1fh). > > Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpa...@amd.com> > --- > Changes from v1 > (https://lore.kernel.org/all/20250304183747.639382-1-suravee.suthikulpa...@amd.com/) > * Use the existing device id 0x1419 instead of the proposed new id. > > hw/i386/amd_iommu.c | 1 + > 1 file changed, 1 insertion(+)
Reviewed-by: Daniel P. Berrangé <berra...@redhat.com> NB, this must be merged before we enable migration support for the device, in order to avoid the need to add versioned machine type compat. With regards, Daniel -- |: https://berrange.com -o- https://www.flickr.com/photos/dberrange :| |: https://libvirt.org -o- https://fstop138.berrange.com :| |: https://entangle-photo.org -o- https://www.instagram.com/dberrange :|
