Re: [Qemu-devel] [RFC PATCH v4 41/44] virtio: make virtio dependencies with Kconfig

[Yang Zhong <yang.zhong@intel.com>]

On Thu, Jan 24, 2019 at 01:51:58PM +0100, Thomas Huth wrote:
> On 2019-01-23 07:56, Yang Zhong wrote:
> > Signed-off-by: Yang Zhong <yang.zhong@intel.com>
> > Reviewed-by: Thomas Huth <thuth@redhat.com>
> > ---
> >  default-configs/i386-softmmu.mak  |  1 -
> >  default-configs/s390x-softmmu.mak |  1 -
> >  default-configs/virtio.mak        | 15 ---------------
> >  hw/9pfs/Kconfig                   |  2 ++
> >  hw/block/Kconfig                  |  2 ++
> >  hw/char/Kconfig                   |  2 ++
> >  hw/display/Kconfig                |  5 +++++
> >  hw/input/Kconfig                  |  2 ++
> >  hw/net/Kconfig                    |  2 ++
> >  hw/pci-host/Kconfig               |  2 ++
> >  hw/scsi/Kconfig                   |  1 +
> >  hw/virtio/Kconfig                 |  9 ++++++++-
> >  12 files changed, 26 insertions(+), 18 deletions(-)
> >  delete mode 100644 default-configs/virtio.mak
> 
> This breaks compilation of aarch64 / arm as long as these targets are
> not fully converted yet:
> 
> Exception: contradiction between clauses when setting VIRTIO_MMIO
> make: *** No rule to make target `aarch64-softmmu/config-devices.mak',
> needed by `config-all-devices.mak'.  Stop.
> 
> I think you temporarily have not to set CONFIG_VIRTIO=y in
> default-configs/arm-softmmu.mak (and likely also in the riscv and s390x
> configs), until they are finally converted completely?
>
   Hello Thomas,
   
   We did not defaultly enable VIRTIO for all ARCHs, and oonly enable this 
   from host bridge. CONFIG_VIRTIO=y is defined in pci.mak, which is not enabled
   for all ARCHs.

   ./hw/pci-host/Kconfig
   config PCI_PIIX
    bool
    select PCI
    select VIRTIO

   config PCI_EXPRESS_Q35
    bool
    select PCI_EXPRESS
    select PCI
    select XIO3130
    select IOH3420
    select I82801B11
    select VIRTIO 
  
    Yang
   
>  Thomas