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Re: [libvirt] [PATCH v3 05/12] qemu: Auto add pci-root for s390/s390x guests

On Tue, 2018-08-07 at 17:10 +0800, Yi Min Zhao wrote:
> The pci-root depends on zpci capability. So autogenerate pci-root if
> zpci exists.
> Signed-off-by: Yi Min Zhao <zyimin linux ibm com>
> Reviewed-by: Boris Fiuczynski <fiuczy linux vnet ibm com>
> Reviewed-by: Stefan Zimmermann <stzi linux ibm com>
> Reviewed-by: Bjoern Walk <bwalk linux vnet ibm com>
> Reviewed-by: Ján Tomko <jtomko redhat com>
> ---
>  src/qemu/qemu_domain.c | 1 +
>  1 file changed, 1 insertion(+)
> diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c
> index de056272e8..a84e5f06b2 100644
> --- a/src/qemu/qemu_domain.c
> +++ b/src/qemu/qemu_domain.c
> @@ -3227,6 +3227,7 @@ qemuDomainDefAddDefaultDevices(virDomainDefPtr def,
>      case VIR_ARCH_S390X:
>          addDefaultUSB = false;
>          addPanicDevice = true;
> +        addPCIRoot = virQEMUCapsGet(qemuCaps, QEMU_CAPS_DEVICE_ZPCI);
>          break;

I wonder if you might want to do this, and other stuff, only if
qemuDomainIsS390CCW()... It seems like that function is not used
a lot, which might mean that someone is going to have to perform
some serious cleaning up if there is ever another machine type
on s390, or perhaps that it just doesn't quite apply here.

If the latter,

  Reviewed-by: Andrea Bolognani <abologna redhat com>

Andrea Bolognani / Red Hat / Virtualization

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