Adding upstream version 5.10.209.upstream/5.10.209upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1064 insertions, 0 deletions

diff --git a/drivers/acpi/acpica/tbdata.c b/drivers/acpi/acpica/tbdata.c
new file mode 100644
index 000000000..523b1e9b9
--- /dev/null
+++ b/drivers/acpi/acpica/tbdata.c
@@ -0,0 +1,1064 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
+/******************************************************************************
+ *
+ * Module Name: tbdata - Table manager data structure functions
+ *
+ * Copyright (C) 2000 - 2020, Intel Corp.
+ *
+ *****************************************************************************/
+
+#include <acpi/acpi.h>
+#include "accommon.h"
+#include "acnamesp.h"
+#include "actables.h"
+#include "acevents.h"
+
+#define _COMPONENT          ACPI_TABLES
+ACPI_MODULE_NAME("tbdata")
+
+/* Local prototypes */
+static acpi_status
+acpi_tb_check_duplication(struct acpi_table_desc *table_desc, u32 *table_index);
+
+static u8
+acpi_tb_compare_tables(struct acpi_table_desc *table_desc, u32 table_index);
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_tb_compare_tables
+ *
+ * PARAMETERS:  table_desc          - Table 1 descriptor to be compared
+ *              table_index         - Index of table 2 to be compared
+ *
+ * RETURN:      TRUE if both tables are identical.
+ *
+ * DESCRIPTION: This function compares a table with another table that has
+ *              already been installed in the root table list.
+ *
+ ******************************************************************************/
+
+static u8
+acpi_tb_compare_tables(struct acpi_table_desc *table_desc, u32 table_index)
+{
+	acpi_status status = AE_OK;
+	u8 is_identical;
+	struct acpi_table_header *table;
+	u32 table_length;
+	u8 table_flags;
+
+	status =
+	    acpi_tb_acquire_table(&acpi_gbl_root_table_list.tables[table_index],
+				  &table, &table_length, &table_flags);
+	if (ACPI_FAILURE(status)) {
+		return (FALSE);
+	}
+
+	/*
+	 * Check for a table match on the entire table length,
+	 * not just the header.
+	 */
+	is_identical = (u8)((table_desc->length != table_length ||
+			     memcmp(table_desc->pointer, table, table_length)) ?
+			    FALSE : TRUE);
+
+	/* Release the acquired table */
+
+	acpi_tb_release_table(table, table_length, table_flags);
+	return (is_identical);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_tb_init_table_descriptor
+ *
+ * PARAMETERS:  table_desc              - Table descriptor
+ *              address                 - Physical address of the table
+ *              flags                   - Allocation flags of the table
+ *              table                   - Pointer to the table
+ *
+ * RETURN:      None
+ *
+ * DESCRIPTION: Initialize a new table descriptor
+ *
+ ******************************************************************************/
+
+void
+acpi_tb_init_table_descriptor(struct acpi_table_desc *table_desc,
+			      acpi_physical_address address,
+			      u8 flags, struct acpi_table_header *table)
+{
+
+	/*
+	 * Initialize the table descriptor. Set the pointer to NULL, since the
+	 * table is not fully mapped at this time.
+	 */
+	memset(table_desc, 0, sizeof(struct acpi_table_desc));
+	table_desc->address = address;
+	table_desc->length = table->length;
+	table_desc->flags = flags;
+	ACPI_MOVE_32_TO_32(table_desc->signature.ascii, table->signature);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_tb_acquire_table
+ *
+ * PARAMETERS:  table_desc          - Table descriptor
+ *              table_ptr           - Where table is returned
+ *              table_length        - Where table length is returned
+ *              table_flags         - Where table allocation flags are returned
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Acquire an ACPI table. It can be used for tables not
+ *              maintained in the acpi_gbl_root_table_list.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_tb_acquire_table(struct acpi_table_desc *table_desc,
+		      struct acpi_table_header **table_ptr,
+		      u32 *table_length, u8 *table_flags)
+{
+	struct acpi_table_header *table = NULL;
+
+	switch (table_desc->flags & ACPI_TABLE_ORIGIN_MASK) {
+	case ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL:
+
+		table =
+		    acpi_os_map_memory(table_desc->address, table_desc->length);
+		break;
+
+	case ACPI_TABLE_ORIGIN_INTERNAL_VIRTUAL:
+	case ACPI_TABLE_ORIGIN_EXTERNAL_VIRTUAL:
+
+		table = ACPI_CAST_PTR(struct acpi_table_header,
+				      ACPI_PHYSADDR_TO_PTR(table_desc->
+							   address));
+		break;
+
+	default:
+
+		break;
+	}
+
+	/* Table is not valid yet */
+
+	if (!table) {
+		return (AE_NO_MEMORY);
+	}
+
+	/* Fill the return values */
+
+	*table_ptr = table;
+	*table_length = table_desc->length;
+	*table_flags = table_desc->flags;
+	return (AE_OK);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_tb_release_table
+ *
+ * PARAMETERS:  table               - Pointer for the table
+ *              table_length        - Length for the table
+ *              table_flags         - Allocation flags for the table
+ *
+ * RETURN:      None
+ *
+ * DESCRIPTION: Release a table. The inverse of acpi_tb_acquire_table().
+ *
+ ******************************************************************************/
+
+void
+acpi_tb_release_table(struct acpi_table_header *table,
+		      u32 table_length, u8 table_flags)
+{
+
+	switch (table_flags & ACPI_TABLE_ORIGIN_MASK) {
+	case ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL:
+
+		acpi_os_unmap_memory(table, table_length);
+		break;
+
+	case ACPI_TABLE_ORIGIN_INTERNAL_VIRTUAL:
+	case ACPI_TABLE_ORIGIN_EXTERNAL_VIRTUAL:
+	default:
+
+		break;
+	}
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_tb_acquire_temp_table
+ *
+ * PARAMETERS:  table_desc          - Table descriptor to be acquired
+ *              address             - Address of the table
+ *              flags               - Allocation flags of the table
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: This function validates the table header to obtain the length
+ *              of a table and fills the table descriptor to make its state as
+ *              "INSTALLED". Such a table descriptor is only used for verified
+ *              installation.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_tb_acquire_temp_table(struct acpi_table_desc *table_desc,
+			   acpi_physical_address address, u8 flags)
+{
+	struct acpi_table_header *table_header;
+
+	switch (flags & ACPI_TABLE_ORIGIN_MASK) {
+	case ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL:
+
+		/* Get the length of the full table from the header */
+
+		table_header =
+		    acpi_os_map_memory(address,
+				       sizeof(struct acpi_table_header));
+		if (!table_header) {
+			return (AE_NO_MEMORY);
+		}
+
+		acpi_tb_init_table_descriptor(table_desc, address, flags,
+					      table_header);
+		acpi_os_unmap_memory(table_header,
+				     sizeof(struct acpi_table_header));
+		return (AE_OK);
+
+	case ACPI_TABLE_ORIGIN_INTERNAL_VIRTUAL:
+	case ACPI_TABLE_ORIGIN_EXTERNAL_VIRTUAL:
+
+		table_header = ACPI_CAST_PTR(struct acpi_table_header,
+					     ACPI_PHYSADDR_TO_PTR(address));
+		if (!table_header) {
+			return (AE_NO_MEMORY);
+		}
+
+		acpi_tb_init_table_descriptor(table_desc, address, flags,
+					      table_header);
+		return (AE_OK);
+
+	default:
+
+		break;
+	}
+
+	/* Table is not valid yet */
+
+	return (AE_NO_MEMORY);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_tb_release_temp_table
+ *
+ * PARAMETERS:  table_desc          - Table descriptor to be released
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: The inverse of acpi_tb_acquire_temp_table().
+ *
+ *****************************************************************************/
+
+void acpi_tb_release_temp_table(struct acpi_table_desc *table_desc)
+{
+
+	/*
+	 * Note that the .Address is maintained by the callers of
+	 * acpi_tb_acquire_temp_table(), thus do not invoke acpi_tb_uninstall_table()
+	 * where .Address will be freed.
+	 */
+	acpi_tb_invalidate_table(table_desc);
+}
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_tb_validate_table
+ *
+ * PARAMETERS:  table_desc          - Table descriptor
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: This function is called to validate the table, the returned
+ *              table descriptor is in "VALIDATED" state.
+ *
+ *****************************************************************************/
+
+acpi_status acpi_tb_validate_table(struct acpi_table_desc *table_desc)
+{
+	acpi_status status = AE_OK;
+
+	ACPI_FUNCTION_TRACE(tb_validate_table);
+
+	/* Validate the table if necessary */
+
+	if (!table_desc->pointer) {
+		status = acpi_tb_acquire_table(table_desc, &table_desc->pointer,
+					       &table_desc->length,
+					       &table_desc->flags);
+		if (!table_desc->pointer) {
+			status = AE_NO_MEMORY;
+		}
+	}
+
+	return_ACPI_STATUS(status);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_tb_invalidate_table
+ *
+ * PARAMETERS:  table_desc          - Table descriptor
+ *
+ * RETURN:      None
+ *
+ * DESCRIPTION: Invalidate one internal ACPI table, this is the inverse of
+ *              acpi_tb_validate_table().
+ *
+ ******************************************************************************/
+
+void acpi_tb_invalidate_table(struct acpi_table_desc *table_desc)
+{
+
+	ACPI_FUNCTION_TRACE(tb_invalidate_table);
+
+	/* Table must be validated */
+
+	if (!table_desc->pointer) {
+		return_VOID;
+	}
+
+	acpi_tb_release_table(table_desc->pointer, table_desc->length,
+			      table_desc->flags);
+	table_desc->pointer = NULL;
+
+	return_VOID;
+}
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_tb_validate_temp_table
+ *
+ * PARAMETERS:  table_desc          - Table descriptor
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: This function is called to validate the table, the returned
+ *              table descriptor is in "VALIDATED" state.
+ *
+ *****************************************************************************/
+
+acpi_status acpi_tb_validate_temp_table(struct acpi_table_desc *table_desc)
+{
+
+	if (!table_desc->pointer && !acpi_gbl_enable_table_validation) {
+		/*
+		 * Only validates the header of the table.
+		 * Note that Length contains the size of the mapping after invoking
+		 * this work around, this value is required by
+		 * acpi_tb_release_temp_table().
+		 * We can do this because in acpi_init_table_descriptor(), the Length
+		 * field of the installed descriptor is filled with the actual
+		 * table length obtaining from the table header.
+		 */
+		table_desc->length = sizeof(struct acpi_table_header);
+	}
+
+	return (acpi_tb_validate_table(table_desc));
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_tb_check_duplication
+ *
+ * PARAMETERS:  table_desc          - Table descriptor
+ *              table_index         - Where the table index is returned
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Avoid installing duplicated tables. However table override and
+ *              user aided dynamic table load is allowed, thus comparing the
+ *              address of the table is not sufficient, and checking the entire
+ *              table content is required.
+ *
+ ******************************************************************************/
+
+static acpi_status
+acpi_tb_check_duplication(struct acpi_table_desc *table_desc, u32 *table_index)
+{
+	u32 i;
+
+	ACPI_FUNCTION_TRACE(tb_check_duplication);
+
+	/* Check if table is already registered */
+
+	for (i = 0; i < acpi_gbl_root_table_list.current_table_count; ++i) {
+
+		/* Do not compare with unverified tables */
+
+		if (!
+		    (acpi_gbl_root_table_list.tables[i].
+		     flags & ACPI_TABLE_IS_VERIFIED)) {
+			continue;
+		}
+
+		/*
+		 * Check for a table match on the entire table length,
+		 * not just the header.
+		 */
+		if (!acpi_tb_compare_tables(table_desc, i)) {
+			continue;
+		}
+
+		/*
+		 * Note: the current mechanism does not unregister a table if it is
+		 * dynamically unloaded. The related namespace entries are deleted,
+		 * but the table remains in the root table list.
+		 *
+		 * The assumption here is that the number of different tables that
+		 * will be loaded is actually small, and there is minimal overhead
+		 * in just keeping the table in case it is needed again.
+		 *
+		 * If this assumption changes in the future (perhaps on large
+		 * machines with many table load/unload operations), tables will
+		 * need to be unregistered when they are unloaded, and slots in the
+		 * root table list should be reused when empty.
+		 */
+		if (acpi_gbl_root_table_list.tables[i].flags &
+		    ACPI_TABLE_IS_LOADED) {
+
+			/* Table is still loaded, this is an error */
+
+			return_ACPI_STATUS(AE_ALREADY_EXISTS);
+		} else {
+			*table_index = i;
+			return_ACPI_STATUS(AE_CTRL_TERMINATE);
+		}
+	}
+
+	/* Indicate no duplication to the caller */
+
+	return_ACPI_STATUS(AE_OK);
+}
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_tb_verify_temp_table
+ *
+ * PARAMETERS:  table_desc          - Table descriptor
+ *              signature           - Table signature to verify
+ *              table_index         - Where the table index is returned
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: This function is called to validate and verify the table, the
+ *              returned table descriptor is in "VALIDATED" state.
+ *              Note that 'TableIndex' is required to be set to !NULL to
+ *              enable duplication check.
+ *
+ *****************************************************************************/
+
+acpi_status
+acpi_tb_verify_temp_table(struct acpi_table_desc *table_desc,
+			  char *signature, u32 *table_index)
+{
+	acpi_status status = AE_OK;
+
+	ACPI_FUNCTION_TRACE(tb_verify_temp_table);
+
+	/* Validate the table */
+
+	status = acpi_tb_validate_temp_table(table_desc);
+	if (ACPI_FAILURE(status)) {
+		return_ACPI_STATUS(AE_NO_MEMORY);
+	}
+
+	/* If a particular signature is expected (DSDT/FACS), it must match */
+
+	if (signature &&
+	    !ACPI_COMPARE_NAMESEG(&table_desc->signature, signature)) {
+		ACPI_BIOS_ERROR((AE_INFO,
+				 "Invalid signature 0x%X for ACPI table, expected [%s]",
+				 table_desc->signature.integer, signature));
+		status = AE_BAD_SIGNATURE;
+		goto invalidate_and_exit;
+	}
+
+	if (acpi_gbl_enable_table_validation) {
+
+		/* Verify the checksum */
+
+		status =
+		    acpi_tb_verify_checksum(table_desc->pointer,
+					    table_desc->length);
+		if (ACPI_FAILURE(status)) {
+			ACPI_EXCEPTION((AE_INFO, AE_NO_MEMORY,
+					"%4.4s 0x%8.8X%8.8X"
+					" Attempted table install failed",
+					acpi_ut_valid_nameseg(table_desc->
+							      signature.
+							      ascii) ?
+					table_desc->signature.ascii : "????",
+					ACPI_FORMAT_UINT64(table_desc->
+							   address)));
+
+			goto invalidate_and_exit;
+		}
+
+		/* Avoid duplications */
+
+		if (table_index) {
+			status =
+			    acpi_tb_check_duplication(table_desc, table_index);
+			if (ACPI_FAILURE(status)) {
+				if (status != AE_CTRL_TERMINATE) {
+					ACPI_EXCEPTION((AE_INFO, status,
+							"%4.4s 0x%8.8X%8.8X"
+							" Table is already loaded",
+							acpi_ut_valid_nameseg
+							(table_desc->signature.
+							 ascii) ? table_desc->
+							signature.
+							ascii : "????",
+							ACPI_FORMAT_UINT64
+							(table_desc->address)));
+				}
+
+				goto invalidate_and_exit;
+			}
+		}
+
+		table_desc->flags |= ACPI_TABLE_IS_VERIFIED;
+	}
+
+	return_ACPI_STATUS(status);
+
+invalidate_and_exit:
+	acpi_tb_invalidate_table(table_desc);
+	return_ACPI_STATUS(status);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_tb_resize_root_table_list
+ *
+ * PARAMETERS:  None
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Expand the size of global table array
+ *
+ ******************************************************************************/
+
+acpi_status acpi_tb_resize_root_table_list(void)
+{
+	struct acpi_table_desc *tables;
+	u32 table_count;
+	u32 current_table_count, max_table_count;
+	u32 i;
+
+	ACPI_FUNCTION_TRACE(tb_resize_root_table_list);
+
+	/* allow_resize flag is a parameter to acpi_initialize_tables */
+
+	if (!(acpi_gbl_root_table_list.flags & ACPI_ROOT_ALLOW_RESIZE)) {
+		ACPI_ERROR((AE_INFO,
+			    "Resize of Root Table Array is not allowed"));
+		return_ACPI_STATUS(AE_SUPPORT);
+	}
+
+	/* Increase the Table Array size */
+
+	if (acpi_gbl_root_table_list.flags & ACPI_ROOT_ORIGIN_ALLOCATED) {
+		table_count = acpi_gbl_root_table_list.max_table_count;
+	} else {
+		table_count = acpi_gbl_root_table_list.current_table_count;
+	}
+
+	max_table_count = table_count + ACPI_ROOT_TABLE_SIZE_INCREMENT;
+	tables = ACPI_ALLOCATE_ZEROED(((acpi_size)max_table_count) *
+				      sizeof(struct acpi_table_desc));
+	if (!tables) {
+		ACPI_ERROR((AE_INFO,
+			    "Could not allocate new root table array"));
+		return_ACPI_STATUS(AE_NO_MEMORY);
+	}
+
+	/* Copy and free the previous table array */
+
+	current_table_count = 0;
+	if (acpi_gbl_root_table_list.tables) {
+		for (i = 0; i < table_count; i++) {
+			if (acpi_gbl_root_table_list.tables[i].address) {
+				memcpy(tables + current_table_count,
+				       acpi_gbl_root_table_list.tables + i,
+				       sizeof(struct acpi_table_desc));
+				current_table_count++;
+			}
+		}
+
+		if (acpi_gbl_root_table_list.flags & ACPI_ROOT_ORIGIN_ALLOCATED) {
+			ACPI_FREE(acpi_gbl_root_table_list.tables);
+		}
+	}
+
+	acpi_gbl_root_table_list.tables = tables;
+	acpi_gbl_root_table_list.max_table_count = max_table_count;
+	acpi_gbl_root_table_list.current_table_count = current_table_count;
+	acpi_gbl_root_table_list.flags |= ACPI_ROOT_ORIGIN_ALLOCATED;
+
+	return_ACPI_STATUS(AE_OK);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_tb_get_next_table_descriptor
+ *
+ * PARAMETERS:  table_index         - Where table index is returned
+ *              table_desc          - Where table descriptor is returned
+ *
+ * RETURN:      Status and table index/descriptor.
+ *
+ * DESCRIPTION: Allocate a new ACPI table entry to the global table list
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_tb_get_next_table_descriptor(u32 *table_index,
+				  struct acpi_table_desc **table_desc)
+{
+	acpi_status status;
+	u32 i;
+
+	/* Ensure that there is room for the table in the Root Table List */
+
+	if (acpi_gbl_root_table_list.current_table_count >=
+	    acpi_gbl_root_table_list.max_table_count) {
+		status = acpi_tb_resize_root_table_list();
+		if (ACPI_FAILURE(status)) {
+			return (status);
+		}
+	}
+
+	i = acpi_gbl_root_table_list.current_table_count;
+	acpi_gbl_root_table_list.current_table_count++;
+
+	if (table_index) {
+		*table_index = i;
+	}
+	if (table_desc) {
+		*table_desc = &acpi_gbl_root_table_list.tables[i];
+	}
+
+	return (AE_OK);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_tb_terminate
+ *
+ * PARAMETERS:  None
+ *
+ * RETURN:      None
+ *
+ * DESCRIPTION: Delete all internal ACPI tables
+ *
+ ******************************************************************************/
+
+void acpi_tb_terminate(void)
+{
+	u32 i;
+
+	ACPI_FUNCTION_TRACE(tb_terminate);
+
+	(void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
+
+	/* Delete the individual tables */
+
+	for (i = 0; i < acpi_gbl_root_table_list.current_table_count; i++) {
+		acpi_tb_uninstall_table(&acpi_gbl_root_table_list.tables[i]);
+	}
+
+	/*
+	 * Delete the root table array if allocated locally. Array cannot be
+	 * mapped, so we don't need to check for that flag.
+	 */
+	if (acpi_gbl_root_table_list.flags & ACPI_ROOT_ORIGIN_ALLOCATED) {
+		ACPI_FREE(acpi_gbl_root_table_list.tables);
+	}
+
+	acpi_gbl_root_table_list.tables = NULL;
+	acpi_gbl_root_table_list.flags = 0;
+	acpi_gbl_root_table_list.current_table_count = 0;
+
+	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "ACPI Tables freed\n"));
+
+	(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
+	return_VOID;
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_tb_delete_namespace_by_owner
+ *
+ * PARAMETERS:  table_index         - Table index
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Delete all namespace objects created when this table was loaded.
+ *
+ ******************************************************************************/
+
+acpi_status acpi_tb_delete_namespace_by_owner(u32 table_index)
+{
+	acpi_owner_id owner_id;
+	acpi_status status;
+
+	ACPI_FUNCTION_TRACE(tb_delete_namespace_by_owner);
+
+	status = acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
+	if (ACPI_FAILURE(status)) {
+		return_ACPI_STATUS(status);
+	}
+
+	if (table_index >= acpi_gbl_root_table_list.current_table_count) {
+
+		/* The table index does not exist */
+
+		(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
+		return_ACPI_STATUS(AE_NOT_EXIST);
+	}
+
+	/* Get the owner ID for this table, used to delete namespace nodes */
+
+	owner_id = acpi_gbl_root_table_list.tables[table_index].owner_id;
+	(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
+
+	/*
+	 * Need to acquire the namespace writer lock to prevent interference
+	 * with any concurrent namespace walks. The interpreter must be
+	 * released during the deletion since the acquisition of the deletion
+	 * lock may block, and also since the execution of a namespace walk
+	 * must be allowed to use the interpreter.
+	 */
+	status = acpi_ut_acquire_write_lock(&acpi_gbl_namespace_rw_lock);
+	if (ACPI_FAILURE(status)) {
+		return_ACPI_STATUS(status);
+	}
+
+	acpi_ns_delete_namespace_by_owner(owner_id);
+	acpi_ut_release_write_lock(&acpi_gbl_namespace_rw_lock);
+	return_ACPI_STATUS(status);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_tb_allocate_owner_id
+ *
+ * PARAMETERS:  table_index         - Table index
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Allocates owner_id in table_desc
+ *
+ ******************************************************************************/
+
+acpi_status acpi_tb_allocate_owner_id(u32 table_index)
+{
+	acpi_status status = AE_BAD_PARAMETER;
+
+	ACPI_FUNCTION_TRACE(tb_allocate_owner_id);
+
+	(void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
+	if (table_index < acpi_gbl_root_table_list.current_table_count) {
+		status =
+		    acpi_ut_allocate_owner_id(&
+					      (acpi_gbl_root_table_list.
+					       tables[table_index].owner_id));
+	}
+
+	(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
+	return_ACPI_STATUS(status);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_tb_release_owner_id
+ *
+ * PARAMETERS:  table_index         - Table index
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Releases owner_id in table_desc
+ *
+ ******************************************************************************/
+
+acpi_status acpi_tb_release_owner_id(u32 table_index)
+{
+	acpi_status status = AE_BAD_PARAMETER;
+
+	ACPI_FUNCTION_TRACE(tb_release_owner_id);
+
+	(void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
+	if (table_index < acpi_gbl_root_table_list.current_table_count) {
+		acpi_ut_release_owner_id(&
+					 (acpi_gbl_root_table_list.
+					  tables[table_index].owner_id));
+		status = AE_OK;
+	}
+
+	(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
+	return_ACPI_STATUS(status);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_tb_get_owner_id
+ *
+ * PARAMETERS:  table_index         - Table index
+ *              owner_id            - Where the table owner_id is returned
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: returns owner_id for the ACPI table
+ *
+ ******************************************************************************/
+
+acpi_status acpi_tb_get_owner_id(u32 table_index, acpi_owner_id *owner_id)
+{
+	acpi_status status = AE_BAD_PARAMETER;
+
+	ACPI_FUNCTION_TRACE(tb_get_owner_id);
+
+	(void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
+	if (table_index < acpi_gbl_root_table_list.current_table_count) {
+		*owner_id =
+		    acpi_gbl_root_table_list.tables[table_index].owner_id;
+		status = AE_OK;
+	}
+
+	(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
+	return_ACPI_STATUS(status);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_tb_is_table_loaded
+ *
+ * PARAMETERS:  table_index         - Index into the root table
+ *
+ * RETURN:      Table Loaded Flag
+ *
+ ******************************************************************************/
+
+u8 acpi_tb_is_table_loaded(u32 table_index)
+{
+	u8 is_loaded = FALSE;
+
+	(void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
+	if (table_index < acpi_gbl_root_table_list.current_table_count) {
+		is_loaded = (u8)
+		    (acpi_gbl_root_table_list.tables[table_index].flags &
+		     ACPI_TABLE_IS_LOADED);
+	}
+
+	(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
+	return (is_loaded);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_tb_set_table_loaded_flag
+ *
+ * PARAMETERS:  table_index         - Table index
+ *              is_loaded           - TRUE if table is loaded, FALSE otherwise
+ *
+ * RETURN:      None
+ *
+ * DESCRIPTION: Sets the table loaded flag to either TRUE or FALSE.
+ *
+ ******************************************************************************/
+
+void acpi_tb_set_table_loaded_flag(u32 table_index, u8 is_loaded)
+{
+
+	(void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
+	if (table_index < acpi_gbl_root_table_list.current_table_count) {
+		if (is_loaded) {
+			acpi_gbl_root_table_list.tables[table_index].flags |=
+			    ACPI_TABLE_IS_LOADED;
+		} else {
+			acpi_gbl_root_table_list.tables[table_index].flags &=
+			    ~ACPI_TABLE_IS_LOADED;
+		}
+	}
+
+	(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_tb_load_table
+ *
+ * PARAMETERS:  table_index             - Table index
+ *              parent_node             - Where table index is returned
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Load an ACPI table
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_tb_load_table(u32 table_index, struct acpi_namespace_node *parent_node)
+{
+	struct acpi_table_header *table;
+	acpi_status status;
+	acpi_owner_id owner_id;
+
+	ACPI_FUNCTION_TRACE(tb_load_table);
+
+	/*
+	 * Note: Now table is "INSTALLED", it must be validated before
+	 * using.
+	 */
+	status = acpi_get_table_by_index(table_index, &table);
+	if (ACPI_FAILURE(status)) {
+		return_ACPI_STATUS(status);
+	}
+
+	status = acpi_ns_load_table(table_index, parent_node);
+	if (ACPI_FAILURE(status)) {
+		return_ACPI_STATUS(status);
+	}
+
+	/*
+	 * Update GPEs for any new _Lxx/_Exx methods. Ignore errors. The host is
+	 * responsible for discovering any new wake GPEs by running _PRW methods
+	 * that may have been loaded by this table.
+	 */
+	status = acpi_tb_get_owner_id(table_index, &owner_id);
+	if (ACPI_SUCCESS(status)) {
+		acpi_ev_update_gpes(owner_id);
+	}
+
+	/* Invoke table handler */
+
+	acpi_tb_notify_table(ACPI_TABLE_EVENT_LOAD, table);
+	return_ACPI_STATUS(status);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_tb_install_and_load_table
+ *
+ * PARAMETERS:  address                 - Physical address of the table
+ *              flags                   - Allocation flags of the table
+ *              override                - Whether override should be performed
+ *              table_index             - Where table index is returned
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Install and load an ACPI table
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_tb_install_and_load_table(acpi_physical_address address,
+			       u8 flags, u8 override, u32 *table_index)
+{
+	acpi_status status;
+	u32 i;
+
+	ACPI_FUNCTION_TRACE(tb_install_and_load_table);
+
+	/* Install the table and load it into the namespace */
+
+	status = acpi_tb_install_standard_table(address, flags, TRUE,
+						override, &i);
+	if (ACPI_FAILURE(status)) {
+		goto exit;
+	}
+
+	status = acpi_tb_load_table(i, acpi_gbl_root_node);
+
+exit:
+	*table_index = i;
+	return_ACPI_STATUS(status);
+}
+
+ACPI_EXPORT_SYMBOL(acpi_tb_install_and_load_table)
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_tb_unload_table
+ *
+ * PARAMETERS:  table_index             - Table index
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Unload an ACPI table
+ *
+ ******************************************************************************/
+
+acpi_status acpi_tb_unload_table(u32 table_index)
+{
+	acpi_status status = AE_OK;
+	struct acpi_table_header *table;
+
+	ACPI_FUNCTION_TRACE(tb_unload_table);
+
+	/* Ensure the table is still loaded */
+
+	if (!acpi_tb_is_table_loaded(table_index)) {
+		return_ACPI_STATUS(AE_NOT_EXIST);
+	}
+
+	/* Invoke table handler */
+
+	status = acpi_get_table_by_index(table_index, &table);
+	if (ACPI_SUCCESS(status)) {
+		acpi_tb_notify_table(ACPI_TABLE_EVENT_UNLOAD, table);
+	}
+
+	/* Delete the portion of the namespace owned by this table */
+
+	status = acpi_tb_delete_namespace_by_owner(table_index);
+	if (ACPI_FAILURE(status)) {
+		return_ACPI_STATUS(status);
+	}
+
+	(void)acpi_tb_release_owner_id(table_index);
+	acpi_tb_set_table_loaded_flag(table_index, FALSE);
+	return_ACPI_STATUS(status);
+}
+
+ACPI_EXPORT_SYMBOL(acpi_tb_unload_table)
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_tb_notify_table
+ *
+ * PARAMETERS:  event               - Table event
+ *              table               - Validated table pointer
+ *
+ * RETURN:      None
+ *
+ * DESCRIPTION: Notify a table event to the users.
+ *
+ ******************************************************************************/
+
+void acpi_tb_notify_table(u32 event, void *table)
+{
+	/* Invoke table handler if present */
+
+	if (acpi_gbl_table_handler) {
+		(void)acpi_gbl_table_handler(event, table,
+					     acpi_gbl_table_handler_context);
+	}
+}