diff --git a/Documentation/ABI/stable/sysfs-driver-dma-idxd b/Documentation/ABI/stable/sysfs-driver-dma-idxd
index 73ab86196a41..5d0df57f5298 100644
--- a/Documentation/ABI/stable/sysfs-driver-dma-idxd
+++ b/Documentation/ABI/stable/sysfs-driver-dma-idxd
@@ -335,3 +335,11 @@ Description:	Show the number of Completion Record (CR) faults failures that this
 		driver cannot fault in the address for the CR. Typically this is caused
 		by a bad address programmed in the submitted descriptor or a malicious
 		submitter is using bad CR address on purpose.
+
+What:		/sys/bus/dsa/devices/wq<m>.<n>/dsa<x>\!wq<m>.<n>/file<y>/pid
+Date:		Sept 14, 2022
+KernelVersion:	6.4.0
+Contact:	dmaengine@vger.kernel.org
+Description:	Show the process id of the application that opened the file. This is
+		helpful information for a monitor daemon that wants to kill the
+		application that opened the file.
diff --git a/drivers/dma/idxd/cdev.c b/drivers/dma/idxd/cdev.c
index 2fb905f2545b..ecbf67c2ad2b 100644
--- a/drivers/dma/idxd/cdev.c
+++ b/drivers/dma/idxd/cdev.c
@@ -49,6 +49,7 @@ struct idxd_user_context {
 	struct idxd_dev idxd_dev;
 	u64 counters[COUNTER_MAX];
 	int id;
+	pid_t pid;
 };
 
 static void idxd_cdev_evl_drain_pasid(struct idxd_wq *wq, u32 pasid);
@@ -78,9 +79,18 @@ static ssize_t cr_fault_failures_show(struct device *dev,
 }
 static DEVICE_ATTR_RO(cr_fault_failures);
 
+static ssize_t pid_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	struct idxd_user_context *ctx = dev_to_uctx(dev);
+
+	return sysfs_emit(buf, "%u\n", ctx->pid);
+}
+static DEVICE_ATTR_RO(pid);
+
 static struct attribute *cdev_file_attributes[] = {
 	&dev_attr_cr_faults.attr,
 	&dev_attr_cr_fault_failures.attr,
+	&dev_attr_pid.attr,
 	NULL
 };
 
@@ -238,6 +248,7 @@ static int idxd_cdev_open(struct inode *inode, struct file *filp)
 
 	ctx->wq = wq;
 	filp->private_data = ctx;
+	ctx->pid = current->pid;
 
 	if (device_user_pasid_enabled(idxd)) {
 		sva = iommu_sva_bind_device(dev, current->mm);