kernel/linux.git/include/uapi/linux/virtio_pci.h, branch v6.18.21

virtio_pci: Use self group type for cap commands

2025-04-14T13:51:31+00:00

Section 2.12.1.2 of v1.4 of the VirtIO spec states: The device and driver capabilities commands are currently defined for self group type. 1. VIRTIO_ADMIN_CMD_CAP_ID_LIST_QUERY 2. VIRTIO_ADMIN_CMD_DEVICE_CAP_GET 3. VIRTIO_ADMIN_CMD_DRIVER_CAP_SET Fixes: bfcad518605d ("virtio: Manage device and driver capabilities via the admin commands") Signed-off-by: Daniel Jurgens Reviewed-by: Parav Pandit Message-Id: <20250304161442.90700-1-danielj@nvidia.com> Signed-off-by: Michael S. Tsirkin

virtio-pci: define type and header for PCI vendor data

2025-01-27T14:39:25+00:00

Added macro definition for VIRTIO_PCI_CAP_VENDOR_CFG to identify the PCI vendor data type in the virtio_pci_cap structure. Defined a new struct virtio_pci_vndr_data for the vendor data capability header as per the specification. Acked-by: Jason Wang Signed-off-by: Shijith Thotton Message-Id: <20250103153226.1933479-3-sthotton@marvell.com> Signed-off-by: Michael S. Tsirkin

virtio_pci: Introduce device parts access commands

2024-11-13T22:25:41+00:00

Introduce device parts access commands via the admin queue. These commands and their structure adhere to the Virtio 1.4 specification. Acked-by: Michael S. Tsirkin Signed-off-by: Yishai Hadas Link: https://lore.kernel.org/r/20241113115200.209269-2-yishaih@nvidia.com Signed-off-by: Alex Williamson

virtio: uapi: Drop __packed attribute in linux/virtio_pci.h

2024-03-19T06:45:49+00:00

Commit 92792ac752aa ("virtio-pci: Introduce admin command sending function") added "__packed" structures to UAPI header linux/virtio_pci.h. This triggers build failures in the consumer userspace applications without proper "definition" of __packed (e.g., kvmtool build fails). Moreover, the structures are already packed well, and doesn't need explicit packing, similar to the rest of the structures in all virtio_* headers. Remove the __packed attribute. Fixes: 92792ac752aa ("virtio-pci: Introduce admin command sending function") Cc: Feng Liu Cc: Michael S. Tsirkin Cc: Yishai Hadas Cc: Alex Williamson Cc: Jean-Philippe Brucker Reviewed-by: Jean-Philippe Brucker Acked-by: Michael S. Tsirkin Signed-off-by: Suzuki K Poulose Message-Id: <20240125232039.913606-1-suzuki.poulose@arm.com> Signed-off-by: Michael S. Tsirkin

virtio-pci: Introduce admin commands

2023-12-19T18:51:32+00:00

Introduces admin commands, as follow: The "list query" command can be used by the driver to query the set of admin commands supported by the virtio device. The "list use" command is used to inform the virtio device which admin commands the driver will use. The "legacy common cfg rd/wr" commands are used to read from/write into the legacy common configuration structure. The "legacy dev cfg rd/wr" commands are used to read from/write into the legacy device configuration structure. The "notify info" command is used to query the notification region information. Signed-off-by: Feng Liu Reviewed-by: Parav Pandit Reviewed-by: Jiri Pirko Acked-by: Michael S. Tsirkin Signed-off-by: Yishai Hadas Link: https://lore.kernel.org/r/20231219093247.170936-5-yishaih@nvidia.com Signed-off-by: Alex Williamson

virtio-pci: Introduce admin command sending function

2023-12-19T18:51:31+00:00

Add support for sending admin command through admin virtqueue interface. Abort any inflight admin commands once device reset completes. Activate admin queue when device becomes ready; deactivate on device reset. To comply to the below specification statement [1], the admin virtqueue is activated for upper layer users only after setting DRIVER_OK status. [1] The driver MUST NOT send any buffer available notifications to the device before setting DRIVER_OK. Signed-off-by: Feng Liu Reviewed-by: Parav Pandit Acked-by: Michael S. Tsirkin Signed-off-by: Yishai Hadas Link: https://lore.kernel.org/r/20231219093247.170936-4-yishaih@nvidia.com Signed-off-by: Alex Williamson

virtio-pci: Introduce admin virtqueue

2023-12-19T18:51:31+00:00

Introduce support for the admin virtqueue. By negotiating VIRTIO_F_ADMIN_VQ feature, driver detects capability and creates one administration virtqueue. Administration virtqueue implementation in virtio pci generic layer, enables multiple types of upper layer drivers such as vfio, net, blk to utilize it. Signed-off-by: Feng Liu Reviewed-by: Parav Pandit Reviewed-by: Jiri Pirko Acked-by: Michael S. Tsirkin Signed-off-by: Yishai Hadas Link: https://lore.kernel.org/r/20231219093247.170936-3-yishaih@nvidia.com Signed-off-by: Alex Williamson

virtio_pci: move structure to a header

2023-11-01T13:31:16+00:00

These are guest/host interfaces, so they belong in the header where e.g. qemu will know to find them. Note: we added a new structure as opposed to extending existing one because someone might be relying on the size of the existing structure staying unchanged. Add a warning to avoid using sizeof. Signed-off-by: Michael S. Tsirkin Reviewed-by: Xuan Zhuo

virtio_pci: struct virtio_pci_common_cfg add queue_reset

2022-08-11T08:06:40+00:00

Add queue_reset in virtio_pci_modern_common_cfg. https://github.com/oasis-tcs/virtio-spec/issues/124 https://github.com/oasis-tcs/virtio-spec/issues/139 Signed-off-by: Xuan Zhuo Acked-by: Jason Wang Message-Id: <20220801063902.129329-30-xuanzhuo@linux.alibaba.com> Signed-off-by: Michael S. Tsirkin

virtio_pci: struct virtio_pci_common_cfg add queue_notify_data

2022-08-11T08:06:40+00:00

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