Re: [PATCH 2/2] ppc/pnv: Fix PCI_EXPRESS dependency

[Thomas Huth <thuth@redhat.com>]

On 06/02/2020 00.17, Laurent Vivier wrote:
> On 05/02/2020 22:20, Greg Kurz wrote:
>> On Wed,  5 Feb 2020 21:41:15 +0100
>> Laurent Vivier <lvivier@redhat.com> wrote:
>>
>>> When PHB4 bridge has been added, the dependencies to PCIE_PORT has been
>>> added to XIVE_SPAPR and indirectly to PSERIES.
>>> The build of the PowerNV machine is fine while we also build the PSERIES
>>> machine.
>>> If we disable the PSERIES machine, the PowerNV build fails because the
>>> PCI Express files are not built:
>>>
>>> /usr/bin/ld: hw/ppc/pnv.o: in function `pnv_chip_power8_pic_print_info':
>>> .../hw/ppc/pnv.c:623: undefined reference to `pnv_phb3_msi_pic_print_info'
>>> /usr/bin/ld: hw/ppc/pnv.o: in function `pnv_chip_power9_pic_print_info':
>>> .../hw/ppc/pnv.c:639: undefined reference to `pnv_phb4_pic_print_info'
>>> /usr/bin/ld: ../hw/usb/hcd-ehci-pci.o: in function `usb_ehci_pci_write_config':
>>> .../hw/usb/hcd-ehci-pci.c:129: undefined reference to `pci_default_write_config'
>>> /usr/bin/ld: ../hw/usb/hcd-ehci-pci.o: in function `usb_ehci_pci_realize':
>>> .../hw/usb/hcd-ehci-pci.c:68: undefined reference to `pci_allocate_irq'
>>> /usr/bin/ld: .../hw/usb/hcd-ehci-pci.c:72: undefined reference to `pci_register_bar'
>>> /usr/bin/ld: ../hw/usb/hcd-ehci-pci.o:(.data.rel+0x50): undefined reference to `vmstate_pci_device'
>>>
>>> This patch fixes the problem by adding needed dependencies to POWERNV.
>>>
>>> Fixes: 4f9924c4d4cf ("ppc/pnv: Add models for POWER9 PHB4 PCIe Host bridge")
>>> Signed-off-by: Laurent Vivier <lvivier@redhat.com>
>>> ---
>>>  hw/ppc/Kconfig | 6 ++++--
>>>  1 file changed, 4 insertions(+), 2 deletions(-)
>>>
>>> diff --git a/hw/ppc/Kconfig b/hw/ppc/Kconfig
>>> index 354828bf132f..3e11d0b53e11 100644
>>> --- a/hw/ppc/Kconfig
>>> +++ b/hw/ppc/Kconfig
>>> @@ -29,6 +29,10 @@ config POWERNV
>>>      select XICS
>>>      select XIVE
>>>      select FDT_PPC
>>> +    select PCI
>>
>> Is it needed since PCI_EXPRESS already selects PCI in hw/pci/Kconfig ?
>>
> 
> You are right, and PCIE_PORT is not needed too, because
> PCIE_PORT is default to 'y' if PCI_DEVICES.

If it's a hard requirement for linking, then it is needed here. Try to
compile after running "configure --without-default-devices" to see
whether you've got all dependencies really right.

 Thomas