Re: [PATCH v6 14/15] vfio: Avoid inspecting option QDict for rombar

[Markus Armbruster <armbru@redhat.com>]

Akihiko Odaki <akihiko.odaki@daynix.com> writes:

> Use pci_rom_bar_explicitly_enabled() to determine if rombar is explicitly
> enabled.
>
> Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
> ---
>  hw/vfio/pci.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
>
> diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c
> index 4fa387f0430d..647f15b2a060 100644
> --- a/hw/vfio/pci.c
> +++ b/hw/vfio/pci.c
> @@ -1012,7 +1012,6 @@ static void vfio_pci_size_rom(VFIOPCIDevice *vdev)
>  {
>      uint32_t orig, size = cpu_to_le32((uint32_t)PCI_ROM_ADDRESS_MASK);
>      off_t offset = vdev->config_offset + PCI_ROM_ADDRESS;
> -    DeviceState *dev = DEVICE(vdev);
>      char *name;
>      int fd = vdev->vbasedev.fd;
>  
> @@ -1046,7 +1045,7 @@ static void vfio_pci_size_rom(VFIOPCIDevice *vdev)
>      }
>  
>      if (vfio_opt_rom_in_denylist(vdev)) {
> -        if (dev->opts && qdict_haskey(dev->opts, "rombar")) {
> +        if (pci_rom_bar_explicitly_enabled(&vdev->pdev)) {
>              warn_report("Device at %s is known to cause system instability"
>                          " issues during option rom execution",
>                          vdev->vbasedev.name);

Consider -device ...,rombar=0xffffffff.

Before the patch, the condition is true.

Afterwards, it's false.

Do we care?