diff --git a/drivers/dma/idxd/cdev.c b/drivers/dma/idxd/cdev.c
index a9b96b18772f..2138c993f207 100644
--- a/drivers/dma/idxd/cdev.c
+++ b/drivers/dma/idxd/cdev.c
@@ -198,6 +198,18 @@ static int idxd_cdev_mmap(struct file *filp, struct vm_area_struct *vma)
 	int rc;
 
 	dev_dbg(&pdev->dev, "%s called\n", __func__);
+
+	/*
+	 * Due to an erratum in some of the devices supported by the driver,
+	 * direct user submission to the device can be unsafe.
+	 * (See the INTEL-SA-01084 security advisory)
+	 *
+	 * For the devices that exhibit this behavior, require that the user
+	 * has CAP_SYS_RAWIO capabilities.
+	 */
+	if (!idxd->user_submission_safe && !capable(CAP_SYS_RAWIO))
+		return -EPERM;
+
 	rc = check_vma(wq, vma, __func__);
 	if (rc < 0)
 		return rc;
diff --git a/drivers/dma/idxd/idxd.h b/drivers/dma/idxd/idxd.h
index 7ced8d283d98..14c6ef987fed 100644
--- a/drivers/dma/idxd/idxd.h
+++ b/drivers/dma/idxd/idxd.h
@@ -258,6 +258,7 @@ struct idxd_driver_data {
 	struct device_type *dev_type;
 	int compl_size;
 	int align;
+	bool user_submission_safe;
 };
 
 struct idxd_device {
@@ -316,6 +317,8 @@ struct idxd_device {
 	struct idxd_pmu *idxd_pmu;
 
 	unsigned long *opcap_bmap;
+
+	bool user_submission_safe;
 };
 
 /* IDXD software descriptor */
diff --git a/drivers/dma/idxd/init.c b/drivers/dma/idxd/init.c
index e0f49545d89f..30193195c813 100644
--- a/drivers/dma/idxd/init.c
+++ b/drivers/dma/idxd/init.c
@@ -48,6 +48,7 @@ static struct idxd_driver_data idxd_driver_data[] = {
 		.compl_size = sizeof(struct dsa_completion_record),
 		.align = 32,
 		.dev_type = &dsa_device_type,
+		.user_submission_safe = false, /* See INTEL-SA-01084 security advisory */
 	},
 	[IDXD_TYPE_IAX] = {
 		.name_prefix = "iax",
@@ -55,6 +56,7 @@ static struct idxd_driver_data idxd_driver_data[] = {
 		.compl_size = sizeof(struct iax_completion_record),
 		.align = 64,
 		.dev_type = &iax_device_type,
+		.user_submission_safe = false, /* See INTEL-SA-01084 security advisory */
 	},
 };
 
@@ -663,6 +665,8 @@ static int idxd_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 	dev_info(&pdev->dev, "Intel(R) Accelerator Device (v%x)\n",
 		 idxd->hw.version);
 
+	idxd->user_submission_safe = data->user_submission_safe;
+
 	return 0;
 
  err_dev_register: