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vfio: Introduce capability definitions for VFIO_DEVICE_GET_INFO

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Allow the VFIO_DEVICE_GET_INFO ioctl to include a capability chain.
Add a flag indicating capability chain support, and introduce the
definitions for the first set of capabilities which are specified to
s390 zPCI devices.

Signed-off-by: Matthew Rosato <mjrosato@linux.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
This commit is contained in:
Matthew Rosato
2020-10-07 14:56:22 -04:00
committed by Alex Williamson
parent 517fe29824
commit 0c633f0be1
2 changed files with 89 additions and 0 deletions
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11
include/uapi/linux/vfio.h
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@@ -201,8 +201,10 @@ struct vfio_device_info {
#define VFIO_DEVICE_FLAGS_AMBA (1 << 3) /* vfio-amba device */
#define VFIO_DEVICE_FLAGS_CCW (1 << 4) /* vfio-ccw device */
#define VFIO_DEVICE_FLAGS_AP (1 << 5) /* vfio-ap device */
#define VFIO_DEVICE_FLAGS_CAPS (1 << 7) /* Info supports caps */
__u32 num_regions; /* Max region index + 1 */
__u32 num_irqs; /* Max IRQ index + 1 */
__u32 cap_offset; /* Offset within info struct of first cap */
};
#define VFIO_DEVICE_GET_INFO _IO(VFIO_TYPE, VFIO_BASE + 7)
@@ -218,6 +220,15 @@ struct vfio_device_info {
#define VFIO_DEVICE_API_CCW_STRING "vfio-ccw"
#define VFIO_DEVICE_API_AP_STRING "vfio-ap"
/*
* The following capabilities are unique to s390 zPCI devices. Their contents
* are further-defined in vfio_zdev.h
*/
#define VFIO_DEVICE_INFO_CAP_ZPCI_BASE 1
#define VFIO_DEVICE_INFO_CAP_ZPCI_GROUP 2
#define VFIO_DEVICE_INFO_CAP_ZPCI_UTIL 3
#define VFIO_DEVICE_INFO_CAP_ZPCI_PFIP 4
/**
* VFIO_DEVICE_GET_REGION_INFO - _IOWR(VFIO_TYPE, VFIO_BASE + 8,
* struct vfio_region_info)