On some servers the upstream bridge does not have enough address window for the ROM bar, currently this will result in the vdev not having a ROM bar and this causes issues if ROM content is needed by the guest driver. On x86 the device's ROM may be passed via setup data to pdev->rom, so it can be used as a fallback. However, it can't be exposed transparently as a PCI resource like the shadow ROM, because it is not aligned to power of two boundaries. So special handling need to be added in vfio to make use of this data just like in the GPU drivers. Yunxiang Li (2): vfio/pci: Remove shadow ROM specific code paths vfio/pci: Expose setup ROM at ROM bar when needed drivers/vfio/pci/vfio_pci_config.c | 8 +++--- drivers/vfio/pci/vfio_pci_core.c | 40 ++++++++++++++---------------- drivers/vfio/pci/vfio_pci_rdwr.c | 25 ++++++++++++------- 3 files changed, 38 insertions(+), 35 deletions(-) -- 2.47.0
