Re: [PATCH 2/3] vfio: Add VFIO_DEVICE_PASID_[AT|DE]TACH_IOMMUFD_PT

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On 2023/11/27 14:50, Duan, Zhenzhong wrote:


-----Original Message-----
From: Liu, Yi L <yi.l.liu@xxxxxxxxx>
Sent: Monday, November 27, 2023 2:39 PM
Subject: [PATCH 2/3] vfio: Add
VFIO_DEVICE_PASID_[AT|DE]TACH_IOMMUFD_PT

This adds ioctls for the userspace to attach a given pasid of a vfio
device to/from an IOAS/HWPT.

Signed-off-by: Yi Liu <yi.l.liu@xxxxxxxxx>
---
drivers/vfio/device_cdev.c | 45 +++++++++++++++++++++++++++++++
drivers/vfio/vfio.h        |  4 +++
drivers/vfio/vfio_main.c   |  8 ++++++
include/uapi/linux/vfio.h  | 55 ++++++++++++++++++++++++++++++++++++++
4 files changed, 112 insertions(+)

diff --git a/drivers/vfio/device_cdev.c b/drivers/vfio/device_cdev.c
index e75da0a70d1f..c2ac7ed44537 100644
--- a/drivers/vfio/device_cdev.c
+++ b/drivers/vfio/device_cdev.c
@@ -210,6 +210,51 @@ int vfio_df_ioctl_detach_pt(struct vfio_device_file *df,
	return 0;
}

+int vfio_df_ioctl_pasid_attach_pt(struct vfio_device_file *df,
+				  struct vfio_device_pasid_attach_iommufd_pt
__user *arg)
+{
+	struct vfio_device *device = df->device;
+	struct vfio_device_pasid_attach_iommufd_pt attach;
+	unsigned long minsz;
+	int ret;
+
+	minsz = offsetofend(struct vfio_device_pasid_attach_iommufd_pt, pt_id);
+
+	if (copy_from_user(&attach, arg, minsz))
+		return -EFAULT;
+
+	if (attach.argsz < minsz || attach.flags)
+		return -EINVAL;
+
+	mutex_lock(&device->dev_set->lock);
+	ret = device->ops->pasid_attach_ioas(device, attach.pasid,
&attach.pt_id);
+	mutex_unlock(&device->dev_set->lock);
+
+	return ret;
+}
+
+int vfio_df_ioctl_pasid_detach_pt(struct vfio_device_file *df,
+				  struct vfio_device_pasid_detach_iommufd_pt
__user *arg)
+{
+	struct vfio_device *device = df->device;
+	struct vfio_device_pasid_detach_iommufd_pt detach;
+	unsigned long minsz;
+
+	minsz = offsetofend(struct vfio_device_pasid_detach_iommufd_pt, flags);

Pasid isn't copied, should use pasid here?

good catch! will fix it.

--
Regards,
Yi Liu




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