diff --git a/MAINTAINERS b/MAINTAINERS
index f0598b3d731c..61af11c9fe06 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -939,6 +939,8 @@ M:	Nipun Gupta <nipun.gupta@amd.com>
 M:	Nikhil Agarwal <nikhil.agarwal@amd.com>
 S:	Maintained
 F:	Documentation/devicetree/bindings/bus/xlnx,cdx.yaml
+F:	drivers/bus/cdx/*
+F:	include/linux/cdx/*
 
 AMD CRYPTOGRAPHIC COPROCESSOR (CCP) DRIVER - SEV SUPPORT
 M:	Brijesh Singh <brijesh.singh@amd.com>
diff --git a/drivers/bus/Kconfig b/drivers/bus/Kconfig
index 7bfe998f3514..b0324efb9a6a 100644
--- a/drivers/bus/Kconfig
+++ b/drivers/bus/Kconfig
@@ -251,5 +251,6 @@ config DA8XX_MSTPRI
 
 source "drivers/bus/fsl-mc/Kconfig"
 source "drivers/bus/mhi/Kconfig"
+source "drivers/bus/cdx/Kconfig"
 
 endmenu
diff --git a/drivers/bus/Makefile b/drivers/bus/Makefile
index d90eed189a65..88649111c395 100644
--- a/drivers/bus/Makefile
+++ b/drivers/bus/Makefile
@@ -20,6 +20,9 @@ obj-$(CONFIG_INTEL_IXP4XX_EB)	+= intel-ixp4xx-eb.o
 obj-$(CONFIG_MIPS_CDMM)		+= mips_cdmm.o
 obj-$(CONFIG_MVEBU_MBUS) 	+= mvebu-mbus.o
 
+#CDX bus
+obj-$(CONFIG_CDX_BUS)		+= cdx/
+
 # Interconnect bus driver for OMAP SoCs.
 obj-$(CONFIG_OMAP_INTERCONNECT)	+= omap_l3_smx.o omap_l3_noc.o
 
diff --git a/drivers/bus/cdx/Kconfig b/drivers/bus/cdx/Kconfig
new file mode 100644
index 000000000000..c1eed5225328
--- /dev/null
+++ b/drivers/bus/cdx/Kconfig
@@ -0,0 +1,7 @@
+config CDX_BUS
+	bool "CDX Bus driver"
+	help
+		Driver to enable CDX Bus infrastructure. CDX bus is
+		capable of scanning devices dynamically, supporting
+		rescanning of dynamically added, removed or updated
+		devices.
diff --git a/drivers/bus/cdx/Makefile b/drivers/bus/cdx/Makefile
new file mode 100644
index 000000000000..e91bfe706294
--- /dev/null
+++ b/drivers/bus/cdx/Makefile
@@ -0,0 +1,3 @@
+obj-$(CONFIG_CDX_BUS) += cdx-bus-driver.o
+
+cdx-bus-driver-objs := cdx.o cdx_msi.o mcdi_stubs.o
diff --git a/drivers/bus/cdx/cdx.c b/drivers/bus/cdx/cdx.c
new file mode 100644
index 000000000000..fc417c32c59b
--- /dev/null
+++ b/drivers/bus/cdx/cdx.c
@@ -0,0 +1,437 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Platform driver for CDX bus.
+ *
+ * Copyright (C) 2022, Advanced Micro Devices, Inc.
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/of.h>
+#include <linux/property.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
+#include <linux/of_platform.h>
+#include <linux/dma-mapping.h>
+#include <linux/dma-map-ops.h>
+#include <linux/property.h>
+#include <linux/iommu.h>
+#include <linux/cdx/cdx_bus.h>
+
+#include "cdx.h"
+#include "mcdi_stubs.h"
+
+/*
+ * Default DMA mask for devices on a CDX bus
+ */
+#define CDX_DEFAULT_DMA_MASK	(~0ULL)
+
+struct platform_device *cdx_controller_pdev;
+
+static int cdx_bus_device_discovery(struct platform_device *pdev);
+
+static int cdx_unregister_device(struct device *dev,
+				 void * __always_unused data)
+{
+	struct cdx_device *cdx_dev = to_cdx_device(dev);
+
+	kfree(cdx_dev->driver_override);
+	cdx_dev->driver_override = NULL;
+
+	/*
+	 * Do not free cdx_dev here as it would be freed in
+	 * cdx_device_release() called from within put_device().
+	 */
+	device_del(&cdx_dev->dev);
+	put_device(&cdx_dev->dev);
+
+	return 0;
+}
+
+void cdx_unregister_devices(struct bus_type *bus)
+{
+	int ret;
+
+	/* Reset all the devices attached to cdx bus */
+	ret = bus_for_each_dev(bus, NULL, NULL, cdx_unregister_device);
+	if (ret)
+		pr_err("error in CDX unregister for all devices\n");
+}
+
+/**
+ * cdx_match_one_device - Tell if a CDX device structure has a matching
+ *			  CDX device id structure
+ * @id: single CDX device id structure to match
+ * @dev: the CDX device structure to match against
+ *
+ * Returns the matching cdx_device_id structure or %NULL if there is no match.
+ */
+static inline const struct cdx_device_id *
+cdx_match_one_device(const struct cdx_device_id *id,
+		     const struct cdx_device *dev)
+{
+	if ((id->vendor == dev->vendor) && (id->device == dev->device))
+		return id;
+	return NULL;
+}
+
+/**
+ * cdx_match_id - See if a CDX device matches a given cdx_id table
+ * @ids: array of CDX device ID structures to search in
+ * @dev: the CDX device structure to match against.
+ *
+ * Used by a driver to check whether a CDX device is in its list of
+ * supported devices.  Returns the matching cdx_device_id structure or
+ * %NULL if there is no match.
+ */
+static inline const struct cdx_device_id *
+cdx_match_id(const struct cdx_device_id *ids, struct cdx_device *dev)
+{
+	if (ids) {
+		while (ids->vendor || ids->device) {
+			if (cdx_match_one_device(ids, dev))
+				return ids;
+			ids++;
+		}
+	}
+	return NULL;
+}
+
+/**
+ * cdx_bus_match - device to driver matching callback
+ * @dev: the cdx device to match against
+ * @drv: the device driver to search for matching cdx device
+ * structures
+ *
+ * Returns 1 on success, 0 otherwise.
+ */
+static int cdx_bus_match(struct device *dev, struct device_driver *drv)
+{
+	struct cdx_device *cdx_dev = to_cdx_device(dev);
+	struct cdx_driver *cdx_drv = to_cdx_driver(drv);
+	const struct cdx_device_id *found_id;
+
+	/* When driver_override is set, only bind to the matching driver */
+	if (cdx_dev->driver_override)
+		return !strcmp(cdx_dev->driver_override, cdx_drv->driver.name);
+
+	found_id = cdx_match_id(cdx_drv->match_id_table, cdx_dev);
+	if (found_id)
+		return true;
+
+	return false;
+}
+
+static int cdx_dma_configure(struct device *dev)
+{
+	struct cdx_device *cdx_dev = to_cdx_device(dev);
+	u32 input_id = cdx_dev->req_id;
+	int ret;
+
+	ret = of_dma_configure_id(dev, dev->parent->of_node, 0, &input_id);
+	if (ret) {
+		dev_err(dev, "of_dma_configure_id() failed\n");
+		return ret;
+	}
+
+	return 0;
+}
+
+struct bus_type cdx_bus_type = {
+	.name = "cdx",
+	.match = cdx_bus_match,
+	.dma_configure  = cdx_dma_configure,
+};
+EXPORT_SYMBOL_GPL(cdx_bus_type);
+
+static int cdx_driver_probe(struct device *dev)
+{
+	struct cdx_driver *cdx_drv = to_cdx_driver(dev->driver);
+	struct cdx_device *cdx_dev = to_cdx_device(dev);
+	int error;
+
+	error = cdx_drv->probe(cdx_dev);
+	if (error < 0) {
+		if (error != -EPROBE_DEFER)
+			dev_err(dev, "%s failed: %d\n", __func__, error);
+		return error;
+	}
+
+	return 0;
+}
+
+static int cdx_driver_remove(struct device *dev)
+{
+	struct cdx_driver *cdx_drv = to_cdx_driver(dev->driver);
+	struct cdx_device *cdx_dev = to_cdx_device(dev);
+	int error;
+
+	error = cdx_drv->remove(cdx_dev);
+	if (error < 0) {
+		dev_err(dev, "%s failed: %d\n", __func__, error);
+		return error;
+	}
+
+	return 0;
+}
+
+static void cdx_driver_shutdown(struct device *dev)
+{
+	struct cdx_driver *cdx_drv = to_cdx_driver(dev->driver);
+	struct cdx_device *cdx_dev = to_cdx_device(dev);
+
+	cdx_drv->shutdown(cdx_dev);
+}
+
+/*
+ * __cdx_driver_register - registers a CDX device driver
+ */
+int __cdx_driver_register(struct cdx_driver *cdx_driver,
+			  struct module *owner)
+{
+	int error;
+
+	cdx_driver->driver.owner = owner;
+	cdx_driver->driver.bus = &cdx_bus_type;
+
+	if (cdx_driver->probe)
+		cdx_driver->driver.probe = cdx_driver_probe;
+
+	if (cdx_driver->remove)
+		cdx_driver->driver.remove = cdx_driver_remove;
+
+	if (cdx_driver->shutdown)
+		cdx_driver->driver.shutdown = cdx_driver_shutdown;
+
+	error = driver_register(&cdx_driver->driver);
+	if (error < 0) {
+		pr_err("driver_register() failed for %s: %d\n",
+		       cdx_driver->driver.name, error);
+		return error;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(__cdx_driver_register);
+
+/*
+ * cdx_driver_unregister - unregisters a device driver from the
+ * CDX bus
+ */
+void cdx_driver_unregister(struct cdx_driver *cdx_driver)
+{
+	driver_unregister(&cdx_driver->driver);
+}
+EXPORT_SYMBOL_GPL(cdx_driver_unregister);
+
+static void cdx_device_release(struct device *dev)
+{
+	struct cdx_device *cdx_dev = to_cdx_device(dev);
+
+	kfree(cdx_dev);
+}
+
+static int cdx_device_add(struct device *parent,
+			  struct cdx_dev_params_t *dev_params)
+{
+	struct cdx_device *cdx_dev;
+	int ret;
+
+	cdx_dev = kzalloc(sizeof(*cdx_dev), GFP_KERNEL);
+	if (!cdx_dev) {
+		dev_err(parent,
+			"memory allocation for cdx dev failed\n");
+		return -ENOMEM;
+	}
+
+	/* Populate resource */
+	memcpy(cdx_dev->res, dev_params->res, sizeof(struct resource) *
+		dev_params->res_count);
+	cdx_dev->res_count = dev_params->res_count;
+
+	/* Populate CDX dev params */
+	cdx_dev->req_id = dev_params->req_id;
+	cdx_dev->vendor = dev_params->vendor;
+	cdx_dev->device = dev_params->device;
+	cdx_dev->bus_id = dev_params->bus_id;
+	cdx_dev->func_id = dev_params->func_id;
+	cdx_dev->dma_mask = CDX_DEFAULT_DMA_MASK;
+
+	/* Initiaize generic device */
+	device_initialize(&cdx_dev->dev);
+	cdx_dev->dev.parent = parent;
+	cdx_dev->dev.bus = &cdx_bus_type;
+	cdx_dev->dev.dma_mask = &cdx_dev->dma_mask;
+	cdx_dev->dev.release = cdx_device_release;
+
+	/* Set Name */
+	dev_set_name(&cdx_dev->dev, "cdx-%02x:%02x", cdx_dev->bus_id,
+			cdx_dev->func_id);
+
+	ret = device_add(&cdx_dev->dev);
+	if (ret != 0) {
+		dev_err(&cdx_dev->dev,
+			"cdx device add failed: %d", ret);
+		goto fail;
+	}
+
+	return 0;
+
+fail:
+	/*
+	 * Do not free cdx_dev here as it would be freed in
+	 * cdx_device_release() called from within put_device().
+	 */
+	put_device(&cdx_dev->dev);
+
+	return ret;
+}
+
+static int cdx_bus_device_discovery(struct platform_device *pdev)
+{
+	struct cdx_mcdi_t *cdx_mcdi = platform_get_drvdata(pdev);
+	int num_cdx_bus, num_cdx_func;
+	uint8_t bus_id, func_id;
+	int ret;
+
+	cdx_controller_pdev = pdev;
+
+	/* MCDI FW Read: Fetch the number of CDX buses present*/
+	num_cdx_bus = cdx_mcdi_get_num_buses(cdx_mcdi);
+
+	for (bus_id = 0; bus_id < num_cdx_bus; bus_id++) {
+		/* MCDI FW Read: Fetch the number of devices present */
+		num_cdx_func = cdx_mcdi_get_num_funcs(cdx_mcdi, bus_id);
+
+		for (func_id = 0; func_id < num_cdx_func; func_id++) {
+			struct cdx_dev_params_t dev_params;
+
+			/* MCDI FW: Get the device config */
+			ret = cdx_mcdi_get_func_config(cdx_mcdi, bus_id,
+					func_id, &dev_params);
+			if (ret) {
+				dev_err(&pdev->dev,
+					"CDX device config get failed for bus: %d\n",
+					ret);
+				goto fail;
+			}
+
+			/* Add the device to the cdx bus */
+			ret = cdx_device_add(&pdev->dev, &dev_params);
+			if (ret == -EPROBE_DEFER) {
+				goto fail;
+			} else if (ret) {
+				dev_err(&pdev->dev,
+					"registering cdx dev: %d failed: %d\n",
+					func_id, ret);
+				goto fail;
+			} else {
+				dev_dbg(&pdev->dev,
+					"CDX dev: %d on cdx bus: %d created\n",
+					func_id, bus_id);
+			}
+		}
+	}
+
+	return 0;
+fail:
+	cdx_unregister_devices(&cdx_bus_type);
+	return ret;
+}
+
+static int cdx_bus_probe(struct platform_device *pdev)
+{
+	struct cdx_mcdi_t *cdx_mcdi;
+	int ret;
+
+	cdx_mcdi = kzalloc(sizeof(*cdx_mcdi), GFP_KERNEL);
+	if (!cdx_mcdi) {
+		dev_err(&pdev->dev, "Failed to allocate memory for cdx_mcdi\n");
+		return -ENOMEM;
+	}
+
+	/* MCDI FW: Initialize the FW path */
+	ret = cdx_mcdi_init(cdx_mcdi);
+	if (ret) {
+		dev_err(&pdev->dev, "MCDI Initialization failed: %d\n", ret);
+		goto mcdi_init_fail;
+	}
+	platform_set_drvdata(pdev, cdx_mcdi);
+
+	/* Discover all the devices on the bus */
+	ret = cdx_bus_device_discovery(pdev);
+	if (ret) {
+		dev_err(&pdev->dev,
+			"CDX bus device discovery failed: %d\n", ret);
+		goto device_discovery_fail;
+	}
+
+	return 0;
+
+mcdi_init_fail:
+	kfree(cdx_mcdi);
+device_discovery_fail:
+	cdx_mcdi_finish(cdx_mcdi);
+
+	return ret;
+}
+
+static int cdx_bus_remove(struct platform_device *pdev)
+{
+	struct cdx_mcdi_t *cdx_mcdi = platform_get_drvdata(pdev);
+
+	cdx_unregister_devices(&cdx_bus_type);
+
+	cdx_mcdi_finish(cdx_mcdi);
+	kfree(cdx_mcdi);
+
+	return 0;
+}
+
+static void cdx_bus_shutdown(struct platform_device *pdev)
+{
+	cdx_bus_remove(pdev);
+}
+
+static const struct of_device_id cdx_match_table[] = {
+	{.compatible = "xlnx,cdxbus-controller-1.0",},
+	{ },
+};
+
+MODULE_DEVICE_TABLE(of, cdx_match_table);
+
+static struct platform_driver cdx_bus_driver = {
+	.driver = {
+		   .name = "cdx-bus",
+		   .pm = NULL,
+		   .of_match_table = cdx_match_table,
+		   },
+	.probe = cdx_bus_probe,
+	.remove = cdx_bus_remove,
+	.shutdown = cdx_bus_shutdown,
+};
+
+static int __init cdx_bus_driver_init(void)
+{
+	int ret;
+
+	ret = bus_register(&cdx_bus_type);
+	if (ret < 0) {
+		pr_err("bus type registration failed for CDX: %d\n", ret);
+		return ret;
+	}
+
+	ret = platform_driver_register(&cdx_bus_driver);
+	if (ret < 0) {
+		pr_err("platform_driver_register() failed: %d\n", ret);
+		goto fail;
+	}
+
+	return 0;
+
+fail:
+	bus_unregister(&cdx_bus_type);
+	return ret;
+}
+postcore_initcall(cdx_bus_driver_init);
diff --git a/drivers/bus/cdx/cdx.h b/drivers/bus/cdx/cdx.h
new file mode 100644
index 000000000000..db0569431c10
--- /dev/null
+++ b/drivers/bus/cdx/cdx.h
@@ -0,0 +1,34 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Header file for the CDX Bus
+ *
+ * Copyright (C) 2022, Advanced Micro Devices, Inc.
+ */
+
+#ifndef _CDX_H_
+#define _CDX_H_
+
+#include <linux/cdx/cdx_bus.h>
+#include <linux/irqdomain.h>
+
+/**
+ * struct cdx_dev_params_t - CDX device parameters
+ * @vendor: Vendor ID for CDX device
+ * @device: Device ID for CDX device
+ * @bus_id: Bus ID for this CDX device
+ * @func_id: Function ID for this device
+ * @res: array of MMIO region entries
+ * @res_count: number of valid MMIO regions
+ * @req_id: Requestor ID associated with CDX device
+ */
+struct cdx_dev_params_t {
+	u16 vendor;
+	u16 device;
+	u8 bus_id;
+	u8 func_id;
+	struct resource res[MAX_CDX_DEV_RESOURCES];
+	u8 res_count;
+	u32 req_id;
+};
+
+#endif /* _CDX_H_ */
diff --git a/drivers/bus/cdx/mcdi_stubs.c b/drivers/bus/cdx/mcdi_stubs.c
new file mode 100644
index 000000000000..cc9d30fa02f8
--- /dev/null
+++ b/drivers/bus/cdx/mcdi_stubs.c
@@ -0,0 +1,54 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * MCDI Firmware interaction for CDX bus.
+ *
+ * Copyright (C) 2022, Advanced Micro Devices, Inc.
+ */
+
+#include <linux/ioport.h>
+
+#include "cdx.h"
+#include "mcdi_stubs.h"
+
+int cdx_mcdi_init(struct cdx_mcdi_t *cdx_mcdi)
+{
+	cdx_mcdi->id = 0;
+	cdx_mcdi->flags = 0;
+
+	return 0;
+}
+
+void cdx_mcdi_finish(struct cdx_mcdi_t *cdx_mcdi)
+{
+}
+
+int cdx_mcdi_get_num_buses(struct cdx_mcdi_t *cdx_mcdi)
+{
+	return 1;
+}
+
+int cdx_mcdi_get_num_funcs(struct cdx_mcdi_t *cdx_mcdi, int bus_num)
+{
+	return 1;
+}
+
+int cdx_mcdi_get_func_config(struct cdx_mcdi_t *cdx_mcdi,
+			     uint8_t bus_id, uint8_t func_id,
+			     struct cdx_dev_params_t *dev_params)
+{
+	dev_params->res[0].start = 0xe4020000;
+	dev_params->res[0].end = 0xe4020FFF;
+	dev_params->res[0].flags = IORESOURCE_MEM;
+	dev_params->res[1].start = 0xe4100000;
+	dev_params->res[1].end = 0xE411FFFF;
+	dev_params->res[1].flags = IORESOURCE_MEM;
+	dev_params->res_count = 2;
+
+	dev_params->req_id = 0x250;
+	dev_params->vendor = 0x10ee;
+	dev_params->device = 0x8084;
+	dev_params->bus_id = bus_id;
+	dev_params->func_id = func_id;
+
+	return 0;
+}
diff --git a/drivers/bus/cdx/mcdi_stubs.h b/drivers/bus/cdx/mcdi_stubs.h
new file mode 100644
index 000000000000..7b6f79d48ce9
--- /dev/null
+++ b/drivers/bus/cdx/mcdi_stubs.h
@@ -0,0 +1,76 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Header file for MCDI FW interaction for CDX bus.
+ *
+ * Copyright (C) 2022, Advanced Micro Devices, Inc.
+ */
+
+#ifndef _MCDI_STUBS_H_
+#define _MCDI_STUBS_H_
+
+#include "cdx.h"
+
+/**
+ * struct cdx_mcdi_t - CDX MCDI Firmware interface, to interact
+ *		       with CDX controller.
+ * @id: ID for MCDI Firmware interface
+ * @flags: Associated flags
+ */
+struct cdx_mcdi_t {
+	u32 id;
+	u32 flags;
+	/* Have more MCDI interface related data */
+};
+
+/**
+ * cdx_mcdi_init - Initialize the MCDI Firmware interface
+ *	for the CDX controller.
+ * @cdx_mcdi: pointer to MCDI interface
+ *
+ * Return 0 on success, <0 on failure
+ */
+int cdx_mcdi_init(struct cdx_mcdi_t *cdx_mcdi);
+
+/**
+ * cdx_mcdi_finish - Close the MCDI Firmware interface.
+ * @cdx_mcdi: pointer to MCDI interface
+ */
+void cdx_mcdi_finish(struct cdx_mcdi_t *cdx_mcdi);
+
+/**
+ * cdx_mcdi_get_num_buses - Get the total number of busses on
+ *	the controller.
+ * @cdx_mcdi: pointer to MCDI interface.
+ *
+ * Return total number of busses available on the controller,
+ *	<0 on failure
+ */
+int cdx_mcdi_get_num_buses(struct cdx_mcdi_t *cdx_mcdi);
+
+/**
+ * cdx_mcdi_get_num_funcs - Get the total number of functions on
+ *	a particular bus of the controller.
+ * @cdx_mcdi: pointer to MCDI interface.
+ * @bus_num: Bus number.
+ *
+ * Return total number of functions available on the bus, <0 on failure
+ */
+int cdx_mcdi_get_num_funcs(struct cdx_mcdi_t *cdx_mcdi, int bus_num);
+
+/**
+ * cdx_mcdi_get_func_config - Get configuration for a particular
+ *	bus_id:func_id
+ * @cdx_mcdi: pointer to MCDI interface.
+ * @bus_num: Bus number.
+ * @func_id: Function number.
+ * @dev_params: Pointer to cdx_dev_params_t, this is populated by this
+ *	function with the configuration corresponding to the provided
+ *	bus_id:func_id.
+ *
+ * Return 0 total number of functions available on the bus, <0 on failure
+ */
+int cdx_mcdi_get_func_config(struct cdx_mcdi_t *cdx_mcdi,
+			     uint8_t bus_id, uint8_t func_id,
+			     struct cdx_dev_params_t *dev_params);
+
+#endif /* _MCDI_STUBS_H_ */
diff --git a/include/linux/cdx/cdx_bus.h b/include/linux/cdx/cdx_bus.h
new file mode 100644
index 000000000000..6e870b2c87d9
--- /dev/null
+++ b/include/linux/cdx/cdx_bus.h
@@ -0,0 +1,93 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * CDX bus public interface
+ *
+ * Copyright (C) 2022, Advanced Micro Devices, Inc.
+ *
+ */
+#ifndef _CDX_BUS_H_
+#define _CDX_BUS_H_
+
+#include <linux/mod_devicetable.h>
+#include <linux/device.h>
+
+#define MAX_CDX_DEV_RESOURCES	6
+
+/**
+ * struct cdx_device - CDX device object
+ * @dev: Linux driver model device object
+ * @vendor: Vendor ID for CDX device
+ * @device: Device ID for CDX device
+ * @bus_id: Bus ID for this CDX device
+ * @func_id: Function ID for this device
+ * @res: array of MMIO region entries
+ * @res_count: number of valid MMIO regions
+ * @dma_mask: Default DMA mask
+ * @flags: CDX device flags
+ * @req_id: Requestor ID associated with CDX device
+ * @driver_override: driver name to force a match; do not set directly,
+ *                   because core frees it; use driver_set_override() to
+ *                   set or clear it.
+ */
+struct cdx_device {
+	struct device dev;
+	u16 vendor;
+	u16 device;
+	u8 bus_id;
+	u8 func_id;
+	struct resource res[MAX_CDX_DEV_RESOURCES];
+	u8 res_count;
+	u64 dma_mask;
+	u16 flags;
+	u32 req_id;
+	const char *driver_override;
+};
+
+#define to_cdx_device(_dev) \
+	container_of(_dev, struct cdx_device, dev)
+
+/**
+ * struct cdx_driver - CDX device driver
+ * @driver: Generic device driver
+ * @match_id_table: table of supported device matching Ids
+ * @probe: Function called when a device is added
+ * @remove: Function called when a device is removed
+ * @shutdown: Function called at shutdown time to quiesce the device
+ * @suspend: Function called when a device is stopped
+ * @resume: Function called when a device is resumed
+ * @driver_managed_dma: Device driver doesn't use kernel DMA API for DMA.
+ *		For most device drivers, no need to care about this flag
+ *		as long as all DMAs are handled through the kernel DMA API.
+ *		For some special ones, for example VFIO drivers, they know
+ *		how to manage the DMA themselves and set this flag so that
+ *		the IOMMU layer will allow them to setup and manage their
+ *		own I/O address space.
+ */
+struct cdx_driver {
+	struct device_driver driver;
+	const struct cdx_device_id *match_id_table;
+	int (*probe)(struct cdx_device *dev);
+	int (*remove)(struct cdx_device *dev);
+	void (*shutdown)(struct cdx_device *dev);
+	int (*suspend)(struct cdx_device *dev, pm_message_t state);
+	int (*resume)(struct cdx_device *dev);
+	bool driver_managed_dma;
+};
+
+#define to_cdx_driver(_drv) \
+	container_of(_drv, struct cdx_driver, driver)
+
+/*
+ * Macro to avoid include chaining to get THIS_MODULE
+ */
+#define cdx_driver_register(drv) \
+	__cdx_driver_register(drv, THIS_MODULE)
+
+int __must_check __cdx_driver_register(struct cdx_driver *cdx_driver,
+				       struct module *owner);
+
+void cdx_driver_unregister(struct cdx_driver *driver);
+
+extern struct bus_type cdx_bus_type;
+
+#endif /* _CDX_BUS_H_ */
diff --git a/include/linux/mod_devicetable.h b/include/linux/mod_devicetable.h
index 549590e9c644..9b94be83d53e 100644
--- a/include/linux/mod_devicetable.h
+++ b/include/linux/mod_devicetable.h
@@ -911,4 +911,17 @@ struct ishtp_device_id {
 	kernel_ulong_t driver_data;
 };
 
+/**
+ * struct cdx_device_id - CDX device identifier
+ * @vendor: vendor ID
+ * @device: Device ID
+ *
+ * Type of entries in the "device Id" table for CDX devices supported by
+ * a CDX device driver.
+ */
+struct cdx_device_id {
+	__u16 vendor;
+	__u16 device;
+};
+
 #endif /* LINUX_MOD_DEVICETABLE_H */
diff --git a/scripts/mod/devicetable-offsets.c b/scripts/mod/devicetable-offsets.c
index c0d3bcb99138..62dc988df84d 100644
--- a/scripts/mod/devicetable-offsets.c
+++ b/scripts/mod/devicetable-offsets.c
@@ -262,5 +262,9 @@ int main(void)
 	DEVID(ishtp_device_id);
 	DEVID_FIELD(ishtp_device_id, guid);
 
+	DEVID(cdx_device_id);
+	DEVID_FIELD(cdx_device_id, vendor);
+	DEVID_FIELD(cdx_device_id, device);
+
 	return 0;
 }
diff --git a/scripts/mod/file2alias.c b/scripts/mod/file2alias.c
index 80d973144fde..c36e1f624e39 100644
--- a/scripts/mod/file2alias.c
+++ b/scripts/mod/file2alias.c
@@ -1452,6 +1452,17 @@ static int do_dfl_entry(const char *filename, void *symval, char *alias)
 	return 1;
 }
 
+/* Looks like: cdx:vNdN */
+static int do_cdx_entry(const char *filename, void *symval,
+			   char *alias)
+{
+	DEF_FIELD(symval, cdx_device_id, vendor);
+	DEF_FIELD(symval, cdx_device_id, device);
+
+	sprintf(alias, "cdx:v%08Xd%08Xd", vendor, device);
+	return 1;
+}
+
 /* Does namelen bytes of name exactly match the symbol? */
 static bool sym_is(const char *name, unsigned namelen, const char *symbol)
 {
@@ -1531,6 +1542,7 @@ static const struct devtable devtable[] = {
 	{"ssam", SIZE_ssam_device_id, do_ssam_entry},
 	{"dfl", SIZE_dfl_device_id, do_dfl_entry},
 	{"ishtp", SIZE_ishtp_device_id, do_ishtp_entry},
+	{"cdx", SIZE_cdx_device_id, do_cdx_entry},
 };
 
 /* Create MODULE_ALIAS() statements.
