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, 551 insertions, 0 deletions

diff --git a/drivers/acpi/acpica/exconfig.c b/drivers/acpi/acpica/exconfig.c
new file mode 100644
index 000000000..e82faabdf
--- /dev/null
+++ b/drivers/acpi/acpica/exconfig.c
@@ -0,0 +1,551 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
+/******************************************************************************
+ *
+ * Module Name: exconfig - Namespace reconfiguration (Load/Unload opcodes)
+ *
+ * Copyright (C) 2000 - 2022, Intel Corp.
+ *
+ *****************************************************************************/
+
+#include <acpi/acpi.h>
+#include "accommon.h"
+#include "acinterp.h"
+#include "acnamesp.h"
+#include "actables.h"
+#include "acdispat.h"
+#include "acevents.h"
+#include "amlcode.h"
+
+#define _COMPONENT          ACPI_EXECUTER
+ACPI_MODULE_NAME("exconfig")
+
+/* Local prototypes */
+static acpi_status
+acpi_ex_add_table(u32 table_index, union acpi_operand_object **ddb_handle);
+
+static acpi_status
+acpi_ex_region_read(union acpi_operand_object *obj_desc,
+		    u32 length, u8 *buffer);
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ex_add_table
+ *
+ * PARAMETERS:  table               - Pointer to raw table
+ *              parent_node         - Where to load the table (scope)
+ *              ddb_handle          - Where to return the table handle.
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Common function to Install and Load an ACPI table with a
+ *              returned table handle.
+ *
+ ******************************************************************************/
+
+static acpi_status
+acpi_ex_add_table(u32 table_index, union acpi_operand_object **ddb_handle)
+{
+	union acpi_operand_object *obj_desc;
+
+	ACPI_FUNCTION_TRACE(ex_add_table);
+
+	/* Create an object to be the table handle */
+
+	obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_LOCAL_REFERENCE);
+	if (!obj_desc) {
+		return_ACPI_STATUS(AE_NO_MEMORY);
+	}
+
+	/* Init the table handle */
+
+	obj_desc->common.flags |= AOPOBJ_DATA_VALID;
+	obj_desc->reference.class = ACPI_REFCLASS_TABLE;
+	obj_desc->reference.value = table_index;
+	*ddb_handle = obj_desc;
+	return_ACPI_STATUS(AE_OK);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ex_load_table_op
+ *
+ * PARAMETERS:  walk_state          - Current state with operands
+ *              return_desc         - Where to store the return object
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Load an ACPI table from the RSDT/XSDT
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ex_load_table_op(struct acpi_walk_state *walk_state,
+		      union acpi_operand_object **return_desc)
+{
+	acpi_status status;
+	union acpi_operand_object **operand = &walk_state->operands[0];
+	struct acpi_namespace_node *parent_node;
+	struct acpi_namespace_node *start_node;
+	struct acpi_namespace_node *parameter_node = NULL;
+	union acpi_operand_object *return_obj;
+	union acpi_operand_object *ddb_handle;
+	u32 table_index;
+
+	ACPI_FUNCTION_TRACE(ex_load_table_op);
+
+	/* Create the return object */
+
+	return_obj = acpi_ut_create_integer_object((u64)0);
+	if (!return_obj) {
+		return_ACPI_STATUS(AE_NO_MEMORY);
+	}
+
+	*return_desc = return_obj;
+
+	/* Find the ACPI table in the RSDT/XSDT */
+
+	acpi_ex_exit_interpreter();
+	status = acpi_tb_find_table(operand[0]->string.pointer,
+				    operand[1]->string.pointer,
+				    operand[2]->string.pointer, &table_index);
+	acpi_ex_enter_interpreter();
+	if (ACPI_FAILURE(status)) {
+		if (status != AE_NOT_FOUND) {
+			return_ACPI_STATUS(status);
+		}
+
+		/* Table not found, return an Integer=0 and AE_OK */
+
+		return_ACPI_STATUS(AE_OK);
+	}
+
+	/* Default nodes */
+
+	start_node = walk_state->scope_info->scope.node;
+	parent_node = acpi_gbl_root_node;
+
+	/* root_path (optional parameter) */
+
+	if (operand[3]->string.length > 0) {
+		/*
+		 * Find the node referenced by the root_path_string. This is the
+		 * location within the namespace where the table will be loaded.
+		 */
+		status = acpi_ns_get_node_unlocked(start_node,
+						   operand[3]->string.pointer,
+						   ACPI_NS_SEARCH_PARENT,
+						   &parent_node);
+		if (ACPI_FAILURE(status)) {
+			return_ACPI_STATUS(status);
+		}
+	}
+
+	/* parameter_path (optional parameter) */
+
+	if (operand[4]->string.length > 0) {
+		if ((operand[4]->string.pointer[0] != AML_ROOT_PREFIX) &&
+		    (operand[4]->string.pointer[0] != AML_PARENT_PREFIX)) {
+			/*
+			 * Path is not absolute, so it will be relative to the node
+			 * referenced by the root_path_string (or the NS root if omitted)
+			 */
+			start_node = parent_node;
+		}
+
+		/* Find the node referenced by the parameter_path_string */
+
+		status = acpi_ns_get_node_unlocked(start_node,
+						   operand[4]->string.pointer,
+						   ACPI_NS_SEARCH_PARENT,
+						   &parameter_node);
+		if (ACPI_FAILURE(status)) {
+			return_ACPI_STATUS(status);
+		}
+	}
+
+	/* Load the table into the namespace */
+
+	ACPI_INFO(("Dynamic OEM Table Load:"));
+	acpi_ex_exit_interpreter();
+	status = acpi_tb_load_table(table_index, parent_node);
+	acpi_ex_enter_interpreter();
+	if (ACPI_FAILURE(status)) {
+		return_ACPI_STATUS(status);
+	}
+
+	status = acpi_ex_add_table(table_index, &ddb_handle);
+	if (ACPI_FAILURE(status)) {
+		return_ACPI_STATUS(status);
+	}
+
+	/* Complete the initialization/resolution of new objects */
+
+	acpi_ex_exit_interpreter();
+	acpi_ns_initialize_objects();
+	acpi_ex_enter_interpreter();
+
+	/* Parameter Data (optional) */
+
+	if (parameter_node) {
+
+		/* Store the parameter data into the optional parameter object */
+
+		status = acpi_ex_store(operand[5],
+				       ACPI_CAST_PTR(union acpi_operand_object,
+						     parameter_node),
+				       walk_state);
+		if (ACPI_FAILURE(status)) {
+			(void)acpi_ex_unload_table(ddb_handle);
+
+			acpi_ut_remove_reference(ddb_handle);
+			return_ACPI_STATUS(status);
+		}
+	}
+
+	/* Remove the reference to ddb_handle created by acpi_ex_add_table above */
+
+	acpi_ut_remove_reference(ddb_handle);
+
+	/* Return -1 (non-zero) indicates success */
+
+	return_obj->integer.value = 0xFFFFFFFFFFFFFFFF;
+	return_ACPI_STATUS(status);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ex_region_read
+ *
+ * PARAMETERS:  obj_desc        - Region descriptor
+ *              length          - Number of bytes to read
+ *              buffer          - Pointer to where to put the data
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Read data from an operation region. The read starts from the
+ *              beginning of the region.
+ *
+ ******************************************************************************/
+
+static acpi_status
+acpi_ex_region_read(union acpi_operand_object *obj_desc, u32 length, u8 *buffer)
+{
+	acpi_status status;
+	u64 value;
+	u32 region_offset = 0;
+	u32 i;
+
+	/* Bytewise reads */
+
+	for (i = 0; i < length; i++) {
+		status =
+		    acpi_ev_address_space_dispatch(obj_desc, NULL, ACPI_READ,
+						   region_offset, 8, &value);
+		if (ACPI_FAILURE(status)) {
+			return (status);
+		}
+
+		*buffer = (u8)value;
+		buffer++;
+		region_offset++;
+	}
+
+	return (AE_OK);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ex_load_op
+ *
+ * PARAMETERS:  obj_desc        - Region or Buffer/Field where the table will be
+ *                                obtained
+ *              target          - Where the status of the load will be stored
+ *              walk_state      - Current state
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Load an ACPI table from a field or operation region
+ *
+ * NOTE: Region Fields (Field, bank_field, index_fields) are resolved to buffer
+ *       objects before this code is reached.
+ *
+ *       If source is an operation region, it must refer to system_memory, as
+ *       per the ACPI specification.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ex_load_op(union acpi_operand_object *obj_desc,
+		union acpi_operand_object *target,
+		struct acpi_walk_state *walk_state)
+{
+	union acpi_operand_object *ddb_handle;
+	struct acpi_table_header *table_header;
+	struct acpi_table_header *table;
+	u32 table_index;
+	acpi_status status;
+	u32 length;
+
+	ACPI_FUNCTION_TRACE(ex_load_op);
+
+	if (target->common.descriptor_type == ACPI_DESC_TYPE_NAMED) {
+		target =
+		    acpi_ns_get_attached_object(ACPI_CAST_PTR
+						(struct acpi_namespace_node,
+						 target));
+	}
+	if (target->common.type != ACPI_TYPE_INTEGER) {
+		ACPI_ERROR((AE_INFO, "Type not integer: %X",
+			    target->common.type));
+		return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
+	}
+
+	target->integer.value = 0;
+
+	/* Source Object can be either an op_region or a Buffer/Field */
+
+	switch (obj_desc->common.type) {
+	case ACPI_TYPE_REGION:
+
+		ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
+				  "Load table from Region %p\n", obj_desc));
+
+		/* Region must be system_memory (from ACPI spec) */
+
+		if (obj_desc->region.space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) {
+			return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
+		}
+
+		/*
+		 * If the Region Address and Length have not been previously
+		 * evaluated, evaluate them now and save the results.
+		 */
+		if (!(obj_desc->common.flags & AOPOBJ_DATA_VALID)) {
+			status = acpi_ds_get_region_arguments(obj_desc);
+			if (ACPI_FAILURE(status)) {
+				return_ACPI_STATUS(status);
+			}
+		}
+
+		/* Get the table header first so we can get the table length */
+
+		table_header = ACPI_ALLOCATE(sizeof(struct acpi_table_header));
+		if (!table_header) {
+			return_ACPI_STATUS(AE_NO_MEMORY);
+		}
+
+		status =
+		    acpi_ex_region_read(obj_desc,
+					sizeof(struct acpi_table_header),
+					ACPI_CAST_PTR(u8, table_header));
+		length = table_header->length;
+		ACPI_FREE(table_header);
+
+		if (ACPI_FAILURE(status)) {
+			return_ACPI_STATUS(status);
+		}
+
+		/* Must have at least an ACPI table header */
+
+		if (length < sizeof(struct acpi_table_header)) {
+			return_ACPI_STATUS(AE_INVALID_TABLE_LENGTH);
+		}
+
+		/*
+		 * The original implementation simply mapped the table, with no copy.
+		 * However, the memory region is not guaranteed to remain stable and
+		 * we must copy the table to a local buffer. For example, the memory
+		 * region is corrupted after suspend on some machines. Dynamically
+		 * loaded tables are usually small, so this overhead is minimal.
+		 *
+		 * The latest implementation (5/2009) does not use a mapping at all.
+		 * We use the low-level operation region interface to read the table
+		 * instead of the obvious optimization of using a direct mapping.
+		 * This maintains a consistent use of operation regions across the
+		 * entire subsystem. This is important if additional processing must
+		 * be performed in the (possibly user-installed) operation region
+		 * handler. For example, acpi_exec and ASLTS depend on this.
+		 */
+
+		/* Allocate a buffer for the table */
+
+		table = ACPI_ALLOCATE(length);
+		if (!table) {
+			return_ACPI_STATUS(AE_NO_MEMORY);
+		}
+
+		/* Read the entire table */
+
+		status = acpi_ex_region_read(obj_desc, length,
+					     ACPI_CAST_PTR(u8, table));
+		if (ACPI_FAILURE(status)) {
+			ACPI_FREE(table);
+			return_ACPI_STATUS(status);
+		}
+		break;
+
+	case ACPI_TYPE_BUFFER:	/* Buffer or resolved region_field */
+
+		ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
+				  "Load table from Buffer or Field %p\n",
+				  obj_desc));
+
+		/* Must have at least an ACPI table header */
+
+		if (obj_desc->buffer.length < sizeof(struct acpi_table_header)) {
+			return_ACPI_STATUS(AE_INVALID_TABLE_LENGTH);
+		}
+
+		/* Get the actual table length from the table header */
+
+		table_header =
+		    ACPI_CAST_PTR(struct acpi_table_header,
+				  obj_desc->buffer.pointer);
+		length = table_header->length;
+
+		/* Table cannot extend beyond the buffer */
+
+		if (length > obj_desc->buffer.length) {
+			return_ACPI_STATUS(AE_AML_BUFFER_LIMIT);
+		}
+		if (length < sizeof(struct acpi_table_header)) {
+			return_ACPI_STATUS(AE_INVALID_TABLE_LENGTH);
+		}
+
+		/*
+		 * Copy the table from the buffer because the buffer could be
+		 * modified or even deleted in the future
+		 */
+		table = ACPI_ALLOCATE(length);
+		if (!table) {
+			return_ACPI_STATUS(AE_NO_MEMORY);
+		}
+
+		memcpy(table, table_header, length);
+		break;
+
+	default:
+
+		return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
+	}
+
+	/* Install the new table into the local data structures */
+
+	ACPI_INFO(("Dynamic OEM Table Load:"));
+	acpi_ex_exit_interpreter();
+	status = acpi_tb_install_and_load_table(ACPI_PTR_TO_PHYSADDR(table),
+						ACPI_TABLE_ORIGIN_INTERNAL_VIRTUAL,
+						table, TRUE, &table_index);
+	acpi_ex_enter_interpreter();
+	if (ACPI_FAILURE(status)) {
+
+		/* Delete allocated table buffer */
+
+		ACPI_FREE(table);
+		return_ACPI_STATUS(status);
+	}
+
+	/*
+	 * Add the table to the namespace.
+	 *
+	 * Note: Load the table objects relative to the root of the namespace.
+	 * This appears to go against the ACPI specification, but we do it for
+	 * compatibility with other ACPI implementations.
+	 */
+	status = acpi_ex_add_table(table_index, &ddb_handle);
+	if (ACPI_FAILURE(status)) {
+		return_ACPI_STATUS(status);
+	}
+
+	/* Complete the initialization/resolution of new objects */
+
+	acpi_ex_exit_interpreter();
+	acpi_ns_initialize_objects();
+	acpi_ex_enter_interpreter();
+
+	/* Remove the reference to ddb_handle created by acpi_ex_add_table above */
+
+	acpi_ut_remove_reference(ddb_handle);
+
+	/* Return -1 (non-zero) indicates success */
+
+	target->integer.value = 0xFFFFFFFFFFFFFFFF;
+	return_ACPI_STATUS(status);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ex_unload_table
+ *
+ * PARAMETERS:  ddb_handle          - Handle to a previously loaded table
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Unload an ACPI table
+ *
+ ******************************************************************************/
+
+acpi_status acpi_ex_unload_table(union acpi_operand_object *ddb_handle)
+{
+	acpi_status status = AE_OK;
+	union acpi_operand_object *table_desc = ddb_handle;
+	u32 table_index;
+
+	ACPI_FUNCTION_TRACE(ex_unload_table);
+
+	/*
+	 * Temporarily emit a warning so that the ASL for the machine can be
+	 * hopefully obtained. This is to say that the Unload() operator is
+	 * extremely rare if not completely unused.
+	 */
+	ACPI_WARNING((AE_INFO, "Received request to unload an ACPI table"));
+
+	/*
+	 * May 2018: Unload is no longer supported for the following reasons:
+	 * 1) A correct implementation on some hosts may not be possible.
+	 * 2) Other ACPI implementations do not correctly/fully support it.
+	 * 3) It requires host device driver support which does not exist.
+	 *    (To properly support namespace unload out from underneath.)
+	 * 4) This AML operator has never been seen in the field.
+	 */
+	ACPI_EXCEPTION((AE_INFO, AE_NOT_IMPLEMENTED,
+			"AML Unload operator is not supported"));
+
+	/*
+	 * Validate the handle
+	 * Although the handle is partially validated in acpi_ex_reconfiguration()
+	 * when it calls acpi_ex_resolve_operands(), the handle is more completely
+	 * validated here.
+	 *
+	 * Handle must be a valid operand object of type reference. Also, the
+	 * ddb_handle must still be marked valid (table has not been previously
+	 * unloaded)
+	 */
+	if ((!ddb_handle) ||
+	    (ACPI_GET_DESCRIPTOR_TYPE(ddb_handle) != ACPI_DESC_TYPE_OPERAND) ||
+	    (ddb_handle->common.type != ACPI_TYPE_LOCAL_REFERENCE) ||
+	    (!(ddb_handle->common.flags & AOPOBJ_DATA_VALID))) {
+		return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
+	}
+
+	/* Get the table index from the ddb_handle */
+
+	table_index = table_desc->reference.value;
+
+	/*
+	 * Release the interpreter lock so that the table lock won't have
+	 * strict order requirement against it.
+	 */
+	acpi_ex_exit_interpreter();
+	status = acpi_tb_unload_table(table_index);
+	acpi_ex_enter_interpreter();
+
+	/*
+	 * Invalidate the handle. We do this because the handle may be stored
+	 * in a named object and may not be actually deleted until much later.
+	 */
+	if (ACPI_SUCCESS(status)) {
+		ddb_handle->common.flags &= ~AOPOBJ_DATA_VALID;
+	}
+	return_ACPI_STATUS(status);
+}