[PATCH v5 11/14] virtio-crypto: emulate virtio crypto as a legacy device by default

[Gonglei <arei.gonglei@huawei.com>]

the scenario of virtio crypto device is mostly NFV, which require
the existing Guest can't need to do any changes to support virtio
crypto, so that they can easily migrate the existing network units
to VM. That's also a basic requirement came from our customers
in production environment.

For virtio crypto driver, we can both support virtio-1.0 or earlier. But
Virtio pci driver module can't discovery the virtio-1.0 devices in most
existing Guests. If we want do this, we have to require the customers
change the virtio pci module for existing guests influence all virtio
devices, which is impossible.

So, let's emulate the virtio crypto device as a legacy virtio
device by default. Using 0x1014 as virtio crypto pci device ID
because virtio crypto ID is 20 (0x14).

Signed-off-by: Gonglei <arei.gonglei@huawei.com>
---
 docs/specs/pci-ids.txt        | 2 ++
 hw/virtio/virtio-crypto-pci.c | 4 +++-
 include/hw/pci/pci.h          | 2 ++
 3 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/docs/specs/pci-ids.txt b/docs/specs/pci-ids.txt
index fd27c67..662d4f8 100644
--- a/docs/specs/pci-ids.txt
+++ b/docs/specs/pci-ids.txt
@@ -22,6 +22,7 @@ maintained as part of the virtio specification.
 1af4:1004  SCSI host bus adapter device (legacy)
 1af4:1005  entropy generator device (legacy)
 1af4:1009  9p filesystem device (legacy)
+1af4:1014  crypto device (legacy)
 
 1af4:1041  network device (modern)
 1af4:1042  block device (modern)
@@ -32,6 +33,7 @@ maintained as part of the virtio specification.
 1af4:1049  9p filesystem device (modern)
 1af4:1050  virtio gpu device (modern)
 1af4:1052  virtio input device (modern)
+1af4:1054  crypto device (modern)
 
 1af4:10f0  Available for experimental usage without registration.  Must get
    to      official ID when the code leaves the test lab (i.e. when seeking
diff --git a/hw/virtio/virtio-crypto-pci.c b/hw/virtio/virtio-crypto-pci.c
index 21d9984..30c10f0 100644
--- a/hw/virtio/virtio-crypto-pci.c
+++ b/hw/virtio/virtio-crypto-pci.c
@@ -32,7 +32,6 @@ static void virtio_crypto_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
     DeviceState *vdev = DEVICE(&vcrypto->vdev);
 
     qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
-    virtio_pci_force_virtio_1(vpci_dev);
     object_property_set_bool(OBJECT(vdev), true, "realized", errp);
     object_property_set_link(OBJECT(vcrypto),
                  OBJECT(vcrypto->vdev.conf.cryptodev), "cryptodev",
@@ -49,6 +48,9 @@ static void virtio_crypto_pci_class_init(ObjectClass *klass, void *data)
     set_bit(DEVICE_CATEGORY_MISC, dc->categories);
     dc->props = virtio_crypto_pci_properties;
 
+    pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
+    pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_CRYPTO;
+    pcidev_k->revision = 0;
     pcidev_k->class_id = PCI_CLASS_OTHERS;
 }
 
diff --git a/include/hw/pci/pci.h b/include/hw/pci/pci.h
index 772692f..5881101 100644
--- a/include/hw/pci/pci.h
+++ b/include/hw/pci/pci.h
@@ -83,6 +83,8 @@
 #define PCI_DEVICE_ID_VIRTIO_RNG         0x1005
 #define PCI_DEVICE_ID_VIRTIO_9P          0x1009
 #define PCI_DEVICE_ID_VIRTIO_VSOCK       0x1012
+#define PCI_DEVICE_ID_VIRTIO_CRYPTO      0x1014
+
 
 #define PCI_VENDOR_ID_REDHAT             0x1b36
 #define PCI_DEVICE_ID_REDHAT_BRIDGE      0x0001
-- 
1.7.12.4