diff options
Diffstat (limited to 'target/linux/layerscape/patches-5.4/821-vfio-0003-vfio-fsl-mc-Implement-VFIO_DEVICE_GET_INFO-ioctl.patch')
| -rw-r--r-- | target/linux/layerscape/patches-5.4/821-vfio-0003-vfio-fsl-mc-Implement-VFIO_DEVICE_GET_INFO-ioctl.patch | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/target/linux/layerscape/patches-5.4/821-vfio-0003-vfio-fsl-mc-Implement-VFIO_DEVICE_GET_INFO-ioctl.patch b/target/linux/layerscape/patches-5.4/821-vfio-0003-vfio-fsl-mc-Implement-VFIO_DEVICE_GET_INFO-ioctl.patch new file mode 100644 index 0000000000..7ec0305050 --- /dev/null +++ b/target/linux/layerscape/patches-5.4/821-vfio-0003-vfio-fsl-mc-Implement-VFIO_DEVICE_GET_INFO-ioctl.patch @@ -0,0 +1,48 @@ +From a548dc00536e2cc6e7e7f95487f5261b3133a0d7 Mon Sep 17 00:00:00 2001 +From: Diana Craciun <diana.craciun@nxp.com> +Date: Wed, 18 Sep 2019 18:26:14 +0300 +Subject: [PATCH] vfio/fsl-mc: Implement VFIO_DEVICE_GET_INFO ioctl + +Allow userspace to get fsl-mc device info (number of regions +and irqs). + +Signed-off-by: Bharat Bhushan <Bharat.Bhushan@nxp.com> +Signed-off-by: Diana Craciun <diana.craciun@nxp.com> +--- + drivers/vfio/fsl-mc/vfio_fsl_mc.c | 22 +++++++++++++++++++++- + 1 file changed, 21 insertions(+), 1 deletion(-) + +--- a/drivers/vfio/fsl-mc/vfio_fsl_mc.c ++++ b/drivers/vfio/fsl-mc/vfio_fsl_mc.c +@@ -32,10 +32,30 @@ static void vfio_fsl_mc_release(void *de + static long vfio_fsl_mc_ioctl(void *device_data, unsigned int cmd, + unsigned long arg) + { ++ unsigned long minsz; ++ struct vfio_fsl_mc_device *vdev = device_data; ++ struct fsl_mc_device *mc_dev = vdev->mc_dev; ++ + switch (cmd) { + case VFIO_DEVICE_GET_INFO: + { +- return -EINVAL; ++ struct vfio_device_info info; ++ ++ minsz = offsetofend(struct vfio_device_info, num_irqs); ++ ++ if (copy_from_user(&info, (void __user *)arg, minsz)) ++ return -EFAULT; ++ ++ if (info.argsz < minsz) ++ return -EINVAL; ++ ++ info.flags = VFIO_DEVICE_FLAGS_FSL_MC; ++ info.num_regions = mc_dev->obj_desc.region_count; ++ info.num_irqs = mc_dev->obj_desc.irq_count; ++ ++ return copy_to_user((void __user *)arg, &info, minsz) ? ++ -EFAULT : 0; ++ + } + case VFIO_DEVICE_GET_REGION_INFO: + { |