Re: [Qemu-devel] [PATCH] virtio-pci: Add subsystem-vendor-id property

["Michael S. Tsirkin" <mst@redhat.com>]

On Wed, Dec 13, 2017 at 12:26:44AM -0800, ben@skyportsystems.com wrote:
> From: Ben Warren <ben@skyportsystems.com>
> 
> Now that virtio-win guest drivers provided by non-Redhat vendors need to
> use a different Subsystem Vendor ID value, a way is needed to set this
> parameter on the host.  This works with all of the PCI-based devices,
> such as NetKVM, viostor, vioscsi, vioserial and balloon.
> 
> Signed-off-by: Ben Warren <ben@skyportsystems.com>

I applied a related patch by Ladi, pls take a look.

> ---
>  hw/virtio/virtio-pci.c | 5 +++++
>  hw/virtio/virtio-pci.h | 1 +
>  2 files changed, 6 insertions(+)
> 
> diff --git a/hw/virtio/virtio-pci.c b/hw/virtio/virtio-pci.c
> index e92837c..b5c86e3 100644
> --- a/hw/virtio/virtio-pci.c
> +++ b/hw/virtio/virtio-pci.c
> @@ -1757,6 +1757,9 @@ static void virtio_pci_realize(PCIDevice *pci_dev, Error **errp)
>      if (proxy->disable_legacy == ON_OFF_AUTO_AUTO) {
>          proxy->disable_legacy = pcie_port ? ON_OFF_AUTO_ON : ON_OFF_AUTO_OFF;
>      }
> +    /* Set the PCI Subsystem Vendor ID */
> +    k->parent_class.subsystem_vendor_id = proxy->subsystem_vendor_id;
> +    pci_set_word(pci_dev->config + PCI_SUBSYSTEM_VENDOR_ID, proxy->subsystem_vendor_id);
>  
>      if (!virtio_pci_modern(proxy) && !virtio_pci_legacy(proxy)) {
>          error_setg(errp, "device cannot work as neither modern nor legacy mode"
> @@ -1876,6 +1879,8 @@ static Property virtio_pci_properties[] = {
>                      VIRTIO_PCI_FLAG_INIT_LNKCTL_BIT, true),
>      DEFINE_PROP_BIT("x-pcie-pm-init", VirtIOPCIProxy, flags,
>                      VIRTIO_PCI_FLAG_INIT_PM_BIT, true),
> +    DEFINE_PROP_UINT16("subsystem-vendor-id", VirtIOPCIProxy,
> +                       subsystem_vendor_id, PCI_VENDOR_ID_REDHAT_QUMRANET),
>      DEFINE_PROP_END_OF_LIST(),
>  };
>  
> diff --git a/hw/virtio/virtio-pci.h b/hw/virtio/virtio-pci.h
> index 12d3a90..8a897ea 100644
> --- a/hw/virtio/virtio-pci.h
> +++ b/hw/virtio/virtio-pci.h
> @@ -186,6 +186,7 @@ struct VirtIOPCIProxy {
>      VirtIOIRQFD *vector_irqfd;
>      int nvqs_with_notifiers;
>      VirtioBusState bus;
> +    uint16_t subsystem_vendor_id;
>  };
>  
>  static inline bool virtio_pci_modern(VirtIOPCIProxy *proxy)
> -- 
> 2.7.4