Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-nextgrafted

Pull networking updates from Jakub Kicinski:
 "Core:

   - Add dedicated kmem_cache for typical/small skb->head, avoid having
     to access struct page at kfree time, and improve memory use.

   - Introduce sysctl to set default RPS configuration for new netdevs.

   - Define Netlink protocol specification format which can be used to
     describe messages used by each family and auto-generate parsers.
     Add tools for generating kernel data structures and uAPI headers.

   - Expose all net/core sysctls inside netns.

   - Remove 4s sleep in netpoll if carrier is instantly detected on
     boot.

   - Add configurable limit of MDB entries per port, and port-vlan.

   - Continue populating drop reasons throughout the stack.

   - Retire a handful of legacy Qdiscs and classifiers.

  Protocols:

   - Support IPv4 big TCP (TSO frames larger than 64kB).

   - Add IP_LOCAL_PORT_RANGE socket option, to control local port range
     on socket by socket basis.

   - Track and report in procfs number of MPTCP sockets used.

   - Support mixing IPv4 and IPv6 flows in the in-kernel MPTCP path
     manager.

   - IPv6: don't check net.ipv6.route.max_size and rely on garbage
     collection to free memory (similarly to IPv4).

   - Support Penultimate Segment Pop (PSP) flavor in SRv6 (RFC8986).

   - ICMP: add per-rate limit counters.

   - Add support for user scanning requests in ieee802154.

   - Remove static WEP support.

   - Support minimal Wi-Fi 7 Extremely High Throughput (EHT) rate
     reporting.

   - WiFi 7 EHT channel puncturing support (client & AP).

  BPF:

   - Add a rbtree data structure following the "next-gen data structure"
     precedent set by recently added linked list, that is, by using
     kfunc + kptr instead of adding a new BPF map type.

   - Expose XDP hints via kfuncs with initial support for RX hash and
     timestamp metadata.

   - Add BPF_F_NO_TUNNEL_KEY extension to bpf_skb_set_tunnel_key to
     better support decap on GRE tunnel devices not operating in collect
     metadata.

   - Improve x86 JIT's codegen for PROBE_MEM runtime error checks.

   - Remove the need for trace_printk_lock for bpf_trace_printk and
     bpf_trace_vprintk helpers.

   - Extend libbpf's bpf_tracing.h support for tracing arguments of
     kprobes/uprobes and syscall as a special case.

   - Significantly reduce the search time for module symbols by
     livepatch and BPF.

   - Enable cpumasks to be used as kptrs, which is useful for tracing
     programs tracking which tasks end up running on which CPUs in
     different time intervals.

   - Add support for BPF trampoline on s390x and riscv64.

   - Add capability to export the XDP features supported by the NIC.

   - Add __bpf_kfunc tag for marking kernel functions as kfuncs.

   - Add cgroup.memory=nobpf kernel parameter option to disable BPF
     memory accounting for container environments.

  Netfilter:

   - Remove the CLUSTERIP target. It has been marked as obsolete for
     years, and we still have WARN splats wrt races of the out-of-band
     /proc interface installed by this target.

   - Add 'destroy' commands to nf_tables. They are identical to the
     existing 'delete' commands, but do not return an error if the
     referenced object (set, chain, rule...) did not exist.

  Driver API:

   - Improve cpumask_local_spread() locality to help NICs set the right
     IRQ affinity on AMD platforms.

   - Separate C22 and C45 MDIO bus transactions more clearly.

   - Introduce new DCB table to control DSCP rewrite on egress.

   - Support configuration of Physical Layer Collision Avoidance (PLCA)
     Reconciliation Sublayer (RS) (802.3cg-2019). Modern version of
     shared medium Ethernet.

   - Support for MAC Merge layer (IEEE 802.3-2018 clause 99). Allowing
     preemption of low priority frames by high priority frames.

   - Add support for controlling MACSec offload using netlink SET.

   - Rework devlink instance refcounts to allow registration and
     de-registration under the instance lock. Split the code into
     multiple files, drop some of the unnecessarily granular locks and
     factor out common parts of netlink operation handling.

   - Add TX frame aggregation parameters (for USB drivers).

   - Add a new attr TCA_EXT_WARN_MSG to report TC (offload) warning
     messages with notifications for debug.

   - Allow offloading of UDP NEW connections via act_ct.

   - Add support for per action HW stats in TC.

   - Support hardware miss to TC action (continue processing in SW from
     a specific point in the action chain).

   - Warn if old Wireless Extension user space interface is used with
     modern cfg80211/mac80211 drivers. Do not support Wireless
     Extensions for Wi-Fi 7 devices at all. Everyone should switch to
     using nl80211 interface instead.

   - Improve the CAN bit timing configuration. Use extack to return
     error messages directly to user space, update the SJW handling,
     including the definition of a new default value that will benefit
     CAN-FD controllers, by increasing their oscillator tolerance.

  New hardware / drivers:

   - Ethernet:
      - nVidia BlueField-3 support (control traffic driver)
      - Ethernet support for imx93 SoCs
      - Motorcomm yt8531 gigabit Ethernet PHY
      - onsemi NCN26000 10BASE-T1S PHY (with support for PLCA)
      - Microchip LAN8841 PHY (incl. cable diagnostics and PTP)
      - Amlogic gxl MDIO mux

   - WiFi:
      - RealTek RTL8188EU (rtl8xxxu)
      - Qualcomm Wi-Fi 7 devices (ath12k)

   - CAN:
      - Renesas R-Car V4H

  Drivers:

   - Bluetooth:
      - Set Per Platform Antenna Gain (PPAG) for Intel controllers.

   - Ethernet NICs:
      - Intel (1G, igc):
         - support TSN / Qbv / packet scheduling features of i226 model
      - Intel (100G, ice):
         - use GNSS subsystem instead of TTY
         - multi-buffer XDP support
         - extend support for GPIO pins to E823 devices
      - nVidia/Mellanox:
         - update the shared buffer configuration on PFC commands
         - implement PTP adjphase function for HW offset control
         - TC support for Geneve and GRE with VF tunnel offload
         - more efficient crypto key management method
         - multi-port eswitch support
      - Netronome/Corigine:
         - add DCB IEEE support
         - support IPsec offloading for NFP3800
      - Freescale/NXP (enetc):
         - support XDP_REDIRECT for XDP non-linear buffers
         - improve reconfig, avoid link flap and waiting for idle
         - support MAC Merge layer
      - Other NICs:
         - sfc/ef100: add basic devlink support for ef100
         - ionic: rx_push mode operation (writing descriptors via MMIO)
         - bnxt: use the auxiliary bus abstraction for RDMA
         - r8169: disable ASPM and reset bus in case of tx timeout
         - cpsw: support QSGMII mode for J721e CPSW9G
         - cpts: support pulse-per-second output
         - ngbe: add an mdio bus driver
         - usbnet: optimize usbnet_bh() by avoiding unnecessary queuing
         - r8152: handle devices with FW with NCM support
         - amd-xgbe: support 10Mbps, 2.5GbE speeds and rx-adaptation
         - virtio-net: support multi buffer XDP
         - virtio/vsock: replace virtio_vsock_pkt with sk_buff
         - tsnep: XDP support

   - Ethernet high-speed switches:
      - nVidia/Mellanox (mlxsw):
         - add support for latency TLV (in FW control messages)
      - Microchip (sparx5):
         - separate explicit and implicit traffic forwarding rules, make
           the implicit rules always active
         - add support for egress DSCP rewrite
         - IS0 VCAP support (Ingress Classification)
         - IS2 VCAP filters (protos, L3 addrs, L4 ports, flags, ToS
           etc.)
         - ES2 VCAP support (Egress Access Control)
         - support for Per-Stream Filtering and Policing (802.1Q,
           8.6.5.1)

   - Ethernet embedded switches:
      - Marvell (mv88e6xxx):
         - add MAB (port auth) offload support
         - enable PTP receive for mv88e6390
      - NXP (ocelot):
         - support MAC Merge layer
         - support for the the vsc7512 internal copper phys
      - Microchip:
         - lan9303: convert to PHYLINK
         - lan966x: support TC flower filter statistics
         - lan937x: PTP support for KSZ9563/KSZ8563 and LAN937x
         - lan937x: support Credit Based Shaper configuration
         - ksz9477: support Energy Efficient Ethernet
      - other:
         - qca8k: convert to regmap read/write API, use bulk operations
         - rswitch: Improve TX timestamp accuracy

   - Intel WiFi (iwlwifi):
      - EHT (Wi-Fi 7) rate reporting
      - STEP equalizer support: transfer some STEP (connection to radio
        on platforms with integrated wifi) related parameters from the
        BIOS to the firmware.

   - Qualcomm 802.11ax WiFi (ath11k):
      - IPQ5018 support
      - Fine Timing Measurement (FTM) responder role support
      - channel 177 support

   - MediaTek WiFi (mt76):
      - per-PHY LED support
      - mt7996: EHT (Wi-Fi 7) support
      - Wireless Ethernet Dispatch (WED) reset support
      - switch to using page pool allocator

   - RealTek WiFi (rtw89):
      - support new version of Bluetooth co-existance

   - Mobile:
      - rmnet: support TX aggregation"

* tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1872 commits)
  page_pool: add a comment explaining the fragment counter usage
  net: ethtool: fix __ethtool_dev_mm_supported() implementation
  ethtool: pse-pd: Fix double word in comments
  xsk: add linux/vmalloc.h to xsk.c
  sefltests: netdevsim: wait for devlink instance after netns removal
  selftest: fib_tests: Always cleanup before exit
  net/mlx5e: Align IPsec ASO result memory to be as required by hardware
  net/mlx5e: TC, Set CT miss to the specific ct action instance
  net/mlx5e: Rename CHAIN_TO_REG to MAPPED_OBJ_TO_REG
  net/mlx5: Refactor tc miss handling to a single function
  net/mlx5: Kconfig: Make tc offload depend on tc skb extension
  net/sched: flower: Support hardware miss to tc action
  net/sched: flower: Move filter handle initialization earlier
  net/sched: cls_api: Support hardware miss to tc action
  net/sched: Rename user cookie and act cookie
  sfc: fix builds without CONFIG_RTC_LIB
  sfc: clean up some inconsistent indentings
  net/mlx4_en: Introduce flexible array to silence overflow warning
  net: lan966x: Fix possible deadlock inside PTP
  net/ulp: Remove redundant ->clone() test in inet_clone_ulp().
  ...

1 files changed, 621 insertions, 0 deletions

diff --git a/drivers/acpi/acpica/evrgnini.c b/drivers/acpi/acpica/evrgnini.c
new file mode 100644
index 000000000..ca4ba6b35
--- /dev/null
+++ b/drivers/acpi/acpica/evrgnini.c
@@ -0,0 +1,621 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
+/******************************************************************************
+ *
+ * Module Name: evrgnini- ACPI address_space (op_region) init
+ *
+ * Copyright (C) 2000 - 2022, Intel Corp.
+ *
+ *****************************************************************************/
+
+#include <acpi/acpi.h>
+#include "accommon.h"
+#include "acevents.h"
+#include "acnamesp.h"
+#include "acinterp.h"
+
+#define _COMPONENT          ACPI_EVENTS
+ACPI_MODULE_NAME("evrgnini")
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_system_memory_region_setup
+ *
+ * PARAMETERS:  handle              - Region we are interested in
+ *              function            - Start or stop
+ *              handler_context     - Address space handler context
+ *              region_context      - Region specific context
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Setup a system_memory operation region
+ *
+ ******************************************************************************/
+acpi_status
+acpi_ev_system_memory_region_setup(acpi_handle handle,
+				   u32 function,
+				   void *handler_context, void **region_context)
+{
+	union acpi_operand_object *region_desc =
+	    (union acpi_operand_object *)handle;
+	struct acpi_mem_space_context *local_region_context;
+	struct acpi_mem_mapping *mm;
+
+	ACPI_FUNCTION_TRACE(ev_system_memory_region_setup);
+
+	if (function == ACPI_REGION_DEACTIVATE) {
+		if (*region_context) {
+			local_region_context =
+			    (struct acpi_mem_space_context *)*region_context;
+
+			/* Delete memory mappings if present */
+
+			while (local_region_context->first_mm) {
+				mm = local_region_context->first_mm;
+				local_region_context->first_mm = mm->next_mm;
+				acpi_os_unmap_memory(mm->logical_address,
+						     mm->length);
+				ACPI_FREE(mm);
+			}
+			ACPI_FREE(local_region_context);
+			*region_context = NULL;
+		}
+		return_ACPI_STATUS(AE_OK);
+	}
+
+	/* Create a new context */
+
+	local_region_context =
+	    ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_mem_space_context));
+	if (!(local_region_context)) {
+		return_ACPI_STATUS(AE_NO_MEMORY);
+	}
+
+	/* Save the region length and address for use in the handler */
+
+	local_region_context->length = region_desc->region.length;
+	local_region_context->address = region_desc->region.address;
+
+	*region_context = local_region_context;
+	return_ACPI_STATUS(AE_OK);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_io_space_region_setup
+ *
+ * PARAMETERS:  handle              - Region we are interested in
+ *              function            - Start or stop
+ *              handler_context     - Address space handler context
+ *              region_context      - Region specific context
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Setup a IO operation region
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ev_io_space_region_setup(acpi_handle handle,
+			      u32 function,
+			      void *handler_context, void **region_context)
+{
+	ACPI_FUNCTION_TRACE(ev_io_space_region_setup);
+
+	if (function == ACPI_REGION_DEACTIVATE) {
+		*region_context = NULL;
+	} else {
+		*region_context = handler_context;
+	}
+
+	return_ACPI_STATUS(AE_OK);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_pci_config_region_setup
+ *
+ * PARAMETERS:  handle              - Region we are interested in
+ *              function            - Start or stop
+ *              handler_context     - Address space handler context
+ *              region_context      - Region specific context
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Setup a PCI_Config operation region
+ *
+ * MUTEX:       Assumes namespace is not locked
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ev_pci_config_region_setup(acpi_handle handle,
+				u32 function,
+				void *handler_context, void **region_context)
+{
+	acpi_status status = AE_OK;
+	u64 pci_value;
+	struct acpi_pci_id *pci_id = *region_context;
+	union acpi_operand_object *handler_obj;
+	struct acpi_namespace_node *parent_node;
+	struct acpi_namespace_node *pci_root_node;
+	struct acpi_namespace_node *pci_device_node;
+	union acpi_operand_object *region_obj =
+	    (union acpi_operand_object *)handle;
+
+	ACPI_FUNCTION_TRACE(ev_pci_config_region_setup);
+
+	handler_obj = region_obj->region.handler;
+	if (!handler_obj) {
+		/*
+		 * No installed handler. This shouldn't happen because the dispatch
+		 * routine checks before we get here, but we check again just in case.
+		 */
+		ACPI_DEBUG_PRINT((ACPI_DB_OPREGION,
+				  "Attempting to init a region %p, with no handler\n",
+				  region_obj));
+		return_ACPI_STATUS(AE_NOT_EXIST);
+	}
+
+	*region_context = NULL;
+	if (function == ACPI_REGION_DEACTIVATE) {
+		if (pci_id) {
+			ACPI_FREE(pci_id);
+		}
+		return_ACPI_STATUS(status);
+	}
+
+	parent_node = region_obj->region.node->parent;
+
+	/*
+	 * Get the _SEG and _BBN values from the device upon which the handler
+	 * is installed.
+	 *
+	 * We need to get the _SEG and _BBN objects relative to the PCI BUS device.
+	 * This is the device the handler has been registered to handle.
+	 */
+
+	/*
+	 * If the address_space.Node is still pointing to the root, we need
+	 * to scan upward for a PCI Root bridge and re-associate the op_region
+	 * handlers with that device.
+	 */
+	if (handler_obj->address_space.node == acpi_gbl_root_node) {
+
+		/* Start search from the parent object */
+
+		pci_root_node = parent_node;
+		while (pci_root_node != acpi_gbl_root_node) {
+
+			/* Get the _HID/_CID in order to detect a root_bridge */
+
+			if (acpi_ev_is_pci_root_bridge(pci_root_node)) {
+
+				/* Install a handler for this PCI root bridge */
+
+				status = acpi_install_address_space_handler((acpi_handle)pci_root_node, ACPI_ADR_SPACE_PCI_CONFIG, ACPI_DEFAULT_HANDLER, NULL, NULL);
+				if (ACPI_FAILURE(status)) {
+					if (status == AE_SAME_HANDLER) {
+						/*
+						 * It is OK if the handler is already installed on the
+						 * root bridge. Still need to return a context object
+						 * for the new PCI_Config operation region, however.
+						 */
+					} else {
+						ACPI_EXCEPTION((AE_INFO, status,
+								"Could not install PciConfig handler "
+								"for Root Bridge %4.4s",
+								acpi_ut_get_node_name
+								(pci_root_node)));
+					}
+				}
+				break;
+			}
+
+			pci_root_node = pci_root_node->parent;
+		}
+
+		/* PCI root bridge not found, use namespace root node */
+	} else {
+		pci_root_node = handler_obj->address_space.node;
+	}
+
+	/*
+	 * If this region is now initialized, we are done.
+	 * (install_address_space_handler could have initialized it)
+	 */
+	if (region_obj->region.flags & AOPOBJ_SETUP_COMPLETE) {
+		return_ACPI_STATUS(AE_OK);
+	}
+
+	/* Region is still not initialized. Create a new context */
+
+	pci_id = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_pci_id));
+	if (!pci_id) {
+		return_ACPI_STATUS(AE_NO_MEMORY);
+	}
+
+	/*
+	 * For PCI_Config space access, we need the segment, bus, device and
+	 * function numbers. Acquire them here.
+	 *
+	 * Find the parent device object. (This allows the operation region to be
+	 * within a subscope under the device, such as a control method.)
+	 */
+	pci_device_node = region_obj->region.node;
+	while (pci_device_node && (pci_device_node->type != ACPI_TYPE_DEVICE)) {
+		pci_device_node = pci_device_node->parent;
+	}
+
+	if (!pci_device_node) {
+		ACPI_FREE(pci_id);
+		return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
+	}
+
+	/*
+	 * Get the PCI device and function numbers from the _ADR object
+	 * contained in the parent's scope.
+	 */
+	status = acpi_ut_evaluate_numeric_object(METHOD_NAME__ADR,
+						 pci_device_node, &pci_value);
+
+	/*
+	 * The default is zero, and since the allocation above zeroed the data,
+	 * just do nothing on failure.
+	 */
+	if (ACPI_SUCCESS(status)) {
+		pci_id->device = ACPI_HIWORD(ACPI_LODWORD(pci_value));
+		pci_id->function = ACPI_LOWORD(ACPI_LODWORD(pci_value));
+	}
+
+	/* The PCI segment number comes from the _SEG method */
+
+	status = acpi_ut_evaluate_numeric_object(METHOD_NAME__SEG,
+						 pci_root_node, &pci_value);
+	if (ACPI_SUCCESS(status)) {
+		pci_id->segment = ACPI_LOWORD(pci_value);
+	}
+
+	/* The PCI bus number comes from the _BBN method */
+
+	status = acpi_ut_evaluate_numeric_object(METHOD_NAME__BBN,
+						 pci_root_node, &pci_value);
+	if (ACPI_SUCCESS(status)) {
+		pci_id->bus = ACPI_LOWORD(pci_value);
+	}
+
+	/* Complete/update the PCI ID for this device */
+
+	status =
+	    acpi_hw_derive_pci_id(pci_id, pci_root_node,
+				  region_obj->region.node);
+	if (ACPI_FAILURE(status)) {
+		ACPI_FREE(pci_id);
+		return_ACPI_STATUS(status);
+	}
+
+	*region_context = pci_id;
+	return_ACPI_STATUS(AE_OK);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_is_pci_root_bridge
+ *
+ * PARAMETERS:  node            - Device node being examined
+ *
+ * RETURN:      TRUE if device is a PCI/PCI-Express Root Bridge
+ *
+ * DESCRIPTION: Determine if the input device represents a PCI Root Bridge by
+ *              examining the _HID and _CID for the device.
+ *
+ ******************************************************************************/
+
+u8 acpi_ev_is_pci_root_bridge(struct acpi_namespace_node *node)
+{
+	acpi_status status;
+	struct acpi_pnp_device_id *hid;
+	struct acpi_pnp_device_id_list *cid;
+	u32 i;
+	u8 match;
+
+	/* Get the _HID and check for a PCI Root Bridge */
+
+	status = acpi_ut_execute_HID(node, &hid);
+	if (ACPI_FAILURE(status)) {
+		return (FALSE);
+	}
+
+	match = acpi_ut_is_pci_root_bridge(hid->string);
+	ACPI_FREE(hid);
+
+	if (match) {
+		return (TRUE);
+	}
+
+	/* The _HID did not match. Get the _CID and check for a PCI Root Bridge */
+
+	status = acpi_ut_execute_CID(node, &cid);
+	if (ACPI_FAILURE(status)) {
+		return (FALSE);
+	}
+
+	/* Check all _CIDs in the returned list */
+
+	for (i = 0; i < cid->count; i++) {
+		if (acpi_ut_is_pci_root_bridge(cid->ids[i].string)) {
+			ACPI_FREE(cid);
+			return (TRUE);
+		}
+	}
+
+	ACPI_FREE(cid);
+	return (FALSE);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_pci_bar_region_setup
+ *
+ * PARAMETERS:  handle              - Region we are interested in
+ *              function            - Start or stop
+ *              handler_context     - Address space handler context
+ *              region_context      - Region specific context
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Setup a pci_BAR operation region
+ *
+ * MUTEX:       Assumes namespace is not locked
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ev_pci_bar_region_setup(acpi_handle handle,
+			     u32 function,
+			     void *handler_context, void **region_context)
+{
+	ACPI_FUNCTION_TRACE(ev_pci_bar_region_setup);
+
+	return_ACPI_STATUS(AE_OK);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_cmos_region_setup
+ *
+ * PARAMETERS:  handle              - Region we are interested in
+ *              function            - Start or stop
+ *              handler_context     - Address space handler context
+ *              region_context      - Region specific context
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Setup a CMOS operation region
+ *
+ * MUTEX:       Assumes namespace is not locked
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ev_cmos_region_setup(acpi_handle handle,
+			  u32 function,
+			  void *handler_context, void **region_context)
+{
+	ACPI_FUNCTION_TRACE(ev_cmos_region_setup);
+
+	return_ACPI_STATUS(AE_OK);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_data_table_region_setup
+ *
+ * PARAMETERS:  handle              - Region we are interested in
+ *              function            - Start or stop
+ *              handler_context     - Address space handler context
+ *              region_context      - Region specific context
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Setup a data_table_region
+ *
+ * MUTEX:       Assumes namespace is not locked
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ev_data_table_region_setup(acpi_handle handle,
+				u32 function,
+				void *handler_context, void **region_context)
+{
+	union acpi_operand_object *region_desc =
+	    (union acpi_operand_object *)handle;
+	struct acpi_data_table_space_context *local_region_context;
+
+	ACPI_FUNCTION_TRACE(ev_data_table_region_setup);
+
+	if (function == ACPI_REGION_DEACTIVATE) {
+		if (*region_context) {
+			ACPI_FREE(*region_context);
+			*region_context = NULL;
+		}
+		return_ACPI_STATUS(AE_OK);
+	}
+
+	/* Create a new context */
+
+	local_region_context =
+	    ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_data_table_space_context));
+	if (!(local_region_context)) {
+		return_ACPI_STATUS(AE_NO_MEMORY);
+	}
+
+	/* Save the data table pointer for use in the handler */
+
+	local_region_context->pointer = region_desc->region.pointer;
+
+	*region_context = local_region_context;
+	return_ACPI_STATUS(AE_OK);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_default_region_setup
+ *
+ * PARAMETERS:  handle              - Region we are interested in
+ *              function            - Start or stop
+ *              handler_context     - Address space handler context
+ *              region_context      - Region specific context
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Default region initialization
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ev_default_region_setup(acpi_handle handle,
+			     u32 function,
+			     void *handler_context, void **region_context)
+{
+	ACPI_FUNCTION_TRACE(ev_default_region_setup);
+
+	if (function == ACPI_REGION_DEACTIVATE) {
+		*region_context = NULL;
+	} else {
+		*region_context = handler_context;
+	}
+
+	return_ACPI_STATUS(AE_OK);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_initialize_region
+ *
+ * PARAMETERS:  region_obj      - Region we are initializing
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Initializes the region, finds any _REG methods and saves them
+ *              for execution at a later time
+ *
+ *              Get the appropriate address space handler for a newly
+ *              created region.
+ *
+ *              This also performs address space specific initialization. For
+ *              example, PCI regions must have an _ADR object that contains
+ *              a PCI address in the scope of the definition. This address is
+ *              required to perform an access to PCI config space.
+ *
+ * MUTEX:       Interpreter should be unlocked, because we may run the _REG
+ *              method for this region.
+ *
+ * NOTE:        Possible incompliance:
+ *              There is a behavior conflict in automatic _REG execution:
+ *              1. When the interpreter is evaluating a method, we can only
+ *                 automatically run _REG for the following case:
+ *                   operation_region (OPR1, 0x80, 0x1000010, 0x4)
+ *              2. When the interpreter is loading a table, we can also
+ *                 automatically run _REG for the following case:
+ *                   operation_region (OPR1, 0x80, 0x1000010, 0x4)
+ *              Though this may not be compliant to the de-facto standard, the
+ *              logic is kept in order not to trigger regressions. And keeping
+ *              this logic should be taken care by the caller of this function.
+ *
+ ******************************************************************************/
+
+acpi_status acpi_ev_initialize_region(union acpi_operand_object *region_obj)
+{
+	union acpi_operand_object *handler_obj;
+	union acpi_operand_object *obj_desc;
+	acpi_adr_space_type space_id;
+	struct acpi_namespace_node *node;
+
+	ACPI_FUNCTION_TRACE(ev_initialize_region);
+
+	if (!region_obj) {
+		return_ACPI_STATUS(AE_BAD_PARAMETER);
+	}
+
+	if (region_obj->common.flags & AOPOBJ_OBJECT_INITIALIZED) {
+		return_ACPI_STATUS(AE_OK);
+	}
+
+	region_obj->common.flags |= AOPOBJ_OBJECT_INITIALIZED;
+
+	node = region_obj->region.node->parent;
+	space_id = region_obj->region.space_id;
+
+	/*
+	 * The following loop depends upon the root Node having no parent
+	 * ie: acpi_gbl_root_node->Parent being set to NULL
+	 */
+	while (node) {
+
+		/* Check to see if a handler exists */
+
+		handler_obj = NULL;
+		obj_desc = acpi_ns_get_attached_object(node);
+		if (obj_desc) {
+
+			/* Can only be a handler if the object exists */
+
+			switch (node->type) {
+			case ACPI_TYPE_DEVICE:
+			case ACPI_TYPE_PROCESSOR:
+			case ACPI_TYPE_THERMAL:
+
+				handler_obj = obj_desc->common_notify.handler;
+				break;
+
+			default:
+
+				/* Ignore other objects */
+
+				break;
+			}
+
+			handler_obj =
+			    acpi_ev_find_region_handler(space_id, handler_obj);
+			if (handler_obj) {
+
+				/* Found correct handler */
+
+				ACPI_DEBUG_PRINT((ACPI_DB_OPREGION,
+						  "Found handler %p for region %p in obj %p\n",
+						  handler_obj, region_obj,
+						  obj_desc));
+
+				(void)acpi_ev_attach_region(handler_obj,
+							    region_obj, FALSE);
+
+				/*
+				 * Tell all users that this region is usable by
+				 * running the _REG method
+				 */
+				acpi_ex_exit_interpreter();
+				(void)acpi_ev_execute_reg_method(region_obj,
+								 ACPI_REG_CONNECT);
+				acpi_ex_enter_interpreter();
+				return_ACPI_STATUS(AE_OK);
+			}
+		}
+
+		/* This node does not have the handler we need; Pop up one level */
+
+		node = node->parent;
+	}
+
+	/*
+	 * If we get here, there is no handler for this region. This is not
+	 * fatal because many regions get created before a handler is installed
+	 * for said region.
+	 */
+	ACPI_DEBUG_PRINT((ACPI_DB_OPREGION,
+			  "No handler for RegionType %s(%X) (RegionObj %p)\n",
+			  acpi_ut_get_region_name(space_id), space_id,
+			  region_obj));
+
+	return_ACPI_STATUS(AE_OK);
+}