virtio_pci: struct virtio_pci_common_cfg add queue_notify_data

Add queue_notify_data in struct virtio_pci_common_cfg, which comes from
here https://github.com/oasis-tcs/virtio-spec/issues/89

In order not to affect the API, add a dedicated structure struct
virtio_pci_modern_common_cfg to virtio_pci_modern.h.

Since I want to add queue_reset after queue_notify_data, I submitted
this patch first.

Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Message-Id: <20220801063902.129329-26-xuanzhuo@linux.alibaba.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

diff --git a/include/linux/virtio_pci_modern.h b/include/linux/virtio_pci_modern.h
index eb2bd9b4077defc9a884cdb0dc1bf47111a4dd3b..41f5a018bd94acce3699a29a580da092a5f0a4ef 100644 (file)
--- a/include/linux/virtio_pci_modern.h
+++ b/include/linux/virtio_pci_modern.h
@@ -5,6 +5,13 @@
 #include <linux/pci.h>
 #include <linux/virtio_pci.h>
 
+struct virtio_pci_modern_common_cfg {
+       struct virtio_pci_common_cfg cfg;
+
+       __le16 queue_notify_data;       /* read-write */
+       __le16 padding;
+};
+
 struct virtio_pci_modern_device {
        struct pci_dev *pci_dev;
 

diff --git a/include/uapi/linux/virtio_pci.h b/include/uapi/linux/virtio_pci.h
index 3a86f36d7e3d965633594fa9210c9ab28221b6b3..f5981a874481a21b41f6a108e4b63e7f247e8339 100644 (file)
--- a/include/uapi/linux/virtio_pci.h
+++ b/include/uapi/linux/virtio_pci.h
@@ -202,6 +202,7 @@ struct virtio_pci_cfg_cap {
 #define VIRTIO_PCI_COMMON_Q_AVAILHI    44
 #define VIRTIO_PCI_COMMON_Q_USEDLO     48
 #define VIRTIO_PCI_COMMON_Q_USEDHI     52
+#define VIRTIO_PCI_COMMON_Q_NDATA      56
 
 #endif /* VIRTIO_PCI_NO_MODERN */