diff options
| author |   Tony Krowiak <akrowiak@linux.ibm.com> | 2023-05-30 18:35:36 -0400 |
|---|---|---|
| committer |   Alexander Gordeev <agordeev@linux.ibm.com> | 2023-06-06 13:42:06 +0200 |
| commit | 6afc770048edc90405c444163de70b1cdfbb8b57 (patch) | |
| tree | a1e2eecc3d29a4395716876b71b729f56a47c967 | |
| parent | Merge branch 'protected-key' into features (diff) | |
| download | wireguard-linux-6afc770048edc90405c444163de70b1cdfbb8b57.tar.xz wireguard-linux-6afc770048edc90405c444163de70b1cdfbb8b57.zip | |
s390/vfio-ap: realize the VFIO_DEVICE_GET_IRQ_INFO ioctl
Realize the VFIO_DEVICE_GET_IRQ_INFO ioctl to retrieve the information for
the VFIO device request IRQ.
Signed-off-by: Tony Krowiak <akrowiak@linux.ibm.com>
Acked-by: Alex Williamson <alex.williamson@redhat.com>
Reviewed-by: Cédric Le Goater <clg@redhat.com>
Reviewed-by: Matthew Rosato <mjrosato@linux.ibm.com>
Tested-by: Matthew Rosato <mjrosato@linux.ibm.com>
Link: https://lore.kernel.org/r/20230530223538.279198-2-akrowiak@linux.ibm.com
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
| -rw-r--r-- | drivers/s390/crypto/vfio_ap_ops.c | 30 | ||||
| -rw-r--r-- | include/uapi/linux/vfio.h | 9 |
2 files changed, 38 insertions, 1 deletions
diff --git a/drivers/s390/crypto/vfio_ap_ops.c b/drivers/s390/crypto/vfio_ap_ops.c index cfbcb864ab63..35cd90eee937 100644 --- a/drivers/s390/crypto/vfio_ap_ops.c +++ b/drivers/s390/crypto/vfio_ap_ops.c @@ -1750,7 +1750,32 @@ static int vfio_ap_mdev_get_device_info(unsigned long arg) info.flags = VFIO_DEVICE_FLAGS_AP | VFIO_DEVICE_FLAGS_RESET; info.num_regions = 0; - info.num_irqs = 0; + info.num_irqs = VFIO_AP_NUM_IRQS; + + return copy_to_user((void __user *)arg, &info, minsz) ? -EFAULT : 0; +} + +static ssize_t vfio_ap_get_irq_info(unsigned long arg) +{ + unsigned long minsz; + struct vfio_irq_info info; + + minsz = offsetofend(struct vfio_irq_info, count); + + if (copy_from_user(&info, (void __user *)arg, minsz)) + return -EFAULT; + + if (info.argsz < minsz || info.index >= VFIO_AP_NUM_IRQS) + return -EINVAL; + + switch (info.index) { + case VFIO_AP_REQ_IRQ_INDEX: + info.count = 1; + info.flags = VFIO_IRQ_INFO_EVENTFD; + break; + default: + return -EINVAL; + } return copy_to_user((void __user *)arg, &info, minsz) ? -EFAULT : 0; } @@ -1770,6 +1795,9 @@ static ssize_t vfio_ap_mdev_ioctl(struct vfio_device *vdev, case VFIO_DEVICE_RESET: ret = vfio_ap_mdev_reset_queues(&matrix_mdev->qtable); break; + case VFIO_DEVICE_GET_IRQ_INFO: + ret = vfio_ap_get_irq_info(arg); + break; default: ret = -EOPNOTSUPP; break; diff --git a/include/uapi/linux/vfio.h b/include/uapi/linux/vfio.h index 0552e8dcf0cb..b71276bd7f91 100644 --- a/include/uapi/linux/vfio.h +++ b/include/uapi/linux/vfio.h @@ -646,6 +646,15 @@ enum { VFIO_CCW_NUM_IRQS }; +/* + * The vfio-ap bus driver makes use of the following IRQ index mapping. + * Unimplemented IRQ types return a count of zero. + */ +enum { + VFIO_AP_REQ_IRQ_INDEX, + VFIO_AP_NUM_IRQS +}; + /** * VFIO_DEVICE_GET_PCI_HOT_RESET_INFO - _IOWR(VFIO_TYPE, VFIO_BASE + 12, * struct vfio_pci_hot_reset_info) |