On Wed, 17 Oct 2018 17:45:52 +0200 Laszlo Ersek <ler...@redhat.com> wrote:
> On 10/16/18 05:31, Acewind wrote: > > In hostdev passthrough, rombar=off also works. Is seabios running without > > any vga rom? How can it access the vga hardware? If the device was initialized by the host into a VGA text mode and the vfio-pci device has VGA support enabled, then VGA access have a good chance of hitting the device regardless of the option ROM. > rombar=off makes QEMU load the PCI expansion ROM into a "genroms" style > fw_cfg file, rather than the PCI device's ROM BAR. SeaBIOS dispatches > the ROM from fw_cfg then. That's how I remember it anyway. > > If you truly wish to prevent oprom loading for a "-device", use the > "romfile=''" property. In general yes, but for vfio-pci they behave the same. There is no default romfile specified in the PCIDeviceClass for a vfio-pci device, so either way gets us to pci_add_option_rom() with either a NULL romfile or a strlen zero romfile. Thanks, Alex _______________________________________________ vfio-users mailing list vfio-users@redhat.com https://www.redhat.com/mailman/listinfo/vfio-users
