Re: [PATCH] vfio: fix virtio-pci dependency

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On Tue,  9 Jan 2024 08:57:19 +0100
Arnd Bergmann <arnd@xxxxxxxxxx> wrote:

> From: Arnd Bergmann <arnd@xxxxxxxx>
> 
> The new vfio-virtio driver already has a dependency on VIRTIO_PCI_ADMIN_LEGACY,
> but that is a bool symbol and allows vfio-virtio to be built-in even if
> virtio-pci itself is a loadable module. This leads to a link failure:
> 
> aarch64-linux-ld: drivers/vfio/pci/virtio/main.o: in function `virtiovf_pci_probe':
> main.c:(.text+0xec): undefined reference to `virtio_pci_admin_has_legacy_io'
> aarch64-linux-ld: drivers/vfio/pci/virtio/main.o: in function `virtiovf_pci_init_device':
> main.c:(.text+0x260): undefined reference to `virtio_pci_admin_legacy_io_notify_info'
> aarch64-linux-ld: drivers/vfio/pci/virtio/main.o: in function `virtiovf_pci_bar0_rw':
> main.c:(.text+0x6ec): undefined reference to `virtio_pci_admin_legacy_common_io_read'
> aarch64-linux-ld: main.c:(.text+0x6f4): undefined reference to `virtio_pci_admin_legacy_device_io_read'
> aarch64-linux-ld: main.c:(.text+0x7f0): undefined reference to `virtio_pci_admin_legacy_common_io_write'
> aarch64-linux-ld: main.c:(.text+0x7f8): undefined reference to `virtio_pci_admin_legacy_device_io_write'
> 
> Add another explicit dependency on the tristate symbol.
> 
> Fixes: eb61eca0e8c3 ("vfio/virtio: Introduce a vfio driver over virtio devices")
> Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
> ---
>  drivers/vfio/pci/virtio/Kconfig | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/vfio/pci/virtio/Kconfig b/drivers/vfio/pci/virtio/Kconfig
> index fc3a0be9d8d4..bd80eca4a196 100644
> --- a/drivers/vfio/pci/virtio/Kconfig
> +++ b/drivers/vfio/pci/virtio/Kconfig
> @@ -1,7 +1,7 @@
>  # SPDX-License-Identifier: GPL-2.0-only
>  config VIRTIO_VFIO_PCI
>          tristate "VFIO support for VIRTIO NET PCI devices"
> -        depends on VIRTIO_PCI_ADMIN_LEGACY
> +        depends on VIRTIO_PCI && VIRTIO_PCI_ADMIN_LEGACY
>          select VFIO_PCI_CORE
>          help
>            This provides support for exposing VIRTIO NET VF devices which support

Applied to vfio next branch for v6.8.  Thanks!

Alex





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