On 25.04.23 15:10, Gerd Hoffmann wrote:
On Tue, Apr 25, 2023 at 03:26:50AM -0400, Michael S. Tsirkin wrote:
On Mon, Apr 24, 2023 at 11:36:47PM +0300, Vladimir Sementsov-Ogievskiy wrote:
On migration, on target we load local ROM file. But actual ROM content
migrates through migration channel. Original ROM content from local
file doesn't matter. But when size mismatch - we have an error like
Size mismatch: 0000:00:03.0/virtio-net-pci.rom: 0x40000 != 0x80000: Invalid
argument
Oh, a 512k rom. Where does that come from?
The ones shipped by qemu are all between 128k and 256k in size,
which gets rounded up to 256k (0x40000). Has not changed since
we added efi boot rom support ...
If you supply your own versions for some reason you must make sure
they have identical size on all host machines.
on my ubuntu 22.04:
dpkg -L ipxe-qemu | grep efi-virtio
/usr/lib/ipxe/qemu/efi-virtio.rom
ls -lthr /usr/lib/ipxe/qemu/efi-virtio.rom
-rw-r--r-- 1 root root 512K Jan 13 2022 /usr/lib/ipxe/qemu/efi-virtio.rom
If look inside the file, it's filled with ffff starting from 0x32400
--
Best regards,
Vladimir
