On Mon, 02/16 17:33, Gerd Hoffmann wrote:
> Add VIRTIO_PCI_FLAG_DISABLE_LEGACY and VIRTIO_PCI_FLAG_DISABLE_MODERN
> for VirtIOPCIProxy->flags. Also add properties for them. They can be
> used to disable modern (virtio 1.0) or legacy (virtio 0.9) modes. By
> default both are advertized and the guest driver can choose.
>
> Signed-off-by: Gerd Hoffmann <kra...@redhat.com>
> ---
> hw/virtio/virtio-pci.c | 46 +++++++++++++++++++++++++++++++++-------------
> hw/virtio/virtio-pci.h | 6 ++++++
> 2 files changed, 39 insertions(+), 13 deletions(-)
>
> diff --git a/hw/virtio/virtio-pci.c b/hw/virtio/virtio-pci.c
> index 4c9a0b8..6c0c650 100644
> --- a/hw/virtio/virtio-pci.c
> +++ b/hw/virtio/virtio-pci.c
> @@ -1233,6 +1233,8 @@ static void virtio_pci_device_plugged(DeviceState *d)
> {
> VirtIOPCIProxy *proxy = VIRTIO_PCI(d);
> VirtioBusState *bus = &proxy->bus;
> + bool legacy = !(proxy->flags & VIRTIO_PCI_FLAG_DISABLE_LEGACY);
> + bool modern = !(proxy->flags & VIRTIO_PCI_FLAG_DISABLE_MODERN);
> uint8_t *config;
> uint32_t size;
>
> @@ -1240,13 +1242,24 @@ static void virtio_pci_device_plugged(DeviceState *d)
> if (proxy->class_code) {
> pci_config_set_class(config, proxy->class_code);
> }
> - pci_set_word(config + PCI_SUBSYSTEM_VENDOR_ID,
> - pci_get_word(config + PCI_VENDOR_ID));
> - pci_set_word(config + PCI_SUBSYSTEM_ID, virtio_bus_get_vdev_id(bus));
> +
> + if (legacy) {
> + /* legacy and transitional */
> + pci_set_word(config + PCI_SUBSYSTEM_VENDOR_ID,
> + pci_get_word(config + PCI_VENDOR_ID));
> + pci_set_word(config + PCI_SUBSYSTEM_ID, virtio_bus_get_vdev_id(bus));
> + } else {
> + /* pure virtio-1.0 */
> + pci_set_word(config + PCI_VENDOR_ID,
> + PCI_VENDOR_ID_REDHAT_QUMRANET);
> + pci_set_word(config + PCI_DEVICE_ID,
> + 0x1040 + virtio_bus_get_vdev_id(bus));
> + pci_config_set_revision(config, 1);
> + }
Should we forbid setting both legacy and modern at the same time?
Fam
