298 lines
8.9 KiB
C
298 lines
8.9 KiB
C
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// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
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/******************************************************************************
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*
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* Module Name: tbinstal - ACPI table installation and removal
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*
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* Copyright (C) 2000 - 2019, Intel Corp.
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*
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*****************************************************************************/
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#include <acpi/acpi.h>
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#include "accommon.h"
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#include "actables.h"
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#define _COMPONENT ACPI_TABLES
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ACPI_MODULE_NAME("tbinstal")
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/*******************************************************************************
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*
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* FUNCTION: acpi_tb_install_table_with_override
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*
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* PARAMETERS: new_table_desc - New table descriptor to install
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* override - Whether override should be performed
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* table_index - Where the table index is returned
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*
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* RETURN: None
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*
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* DESCRIPTION: Install an ACPI table into the global data structure. The
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* table override mechanism is called to allow the host
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* OS to replace any table before it is installed in the root
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* table array.
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*
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******************************************************************************/
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void
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acpi_tb_install_table_with_override(struct acpi_table_desc *new_table_desc,
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u8 override, u32 *table_index)
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{
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u32 i;
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acpi_status status;
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status = acpi_tb_get_next_table_descriptor(&i, NULL);
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if (ACPI_FAILURE(status)) {
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return;
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}
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/*
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* ACPI Table Override:
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*
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* Before we install the table, let the host OS override it with a new
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* one if desired. Any table within the RSDT/XSDT can be replaced,
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* including the DSDT which is pointed to by the FADT.
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*/
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if (override) {
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acpi_tb_override_table(new_table_desc);
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}
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acpi_tb_init_table_descriptor(&acpi_gbl_root_table_list.tables[i],
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new_table_desc->address,
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new_table_desc->flags,
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new_table_desc->pointer);
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acpi_tb_print_table_header(new_table_desc->address,
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new_table_desc->pointer);
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/* This synchronizes acpi_gbl_dsdt_index */
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*table_index = i;
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/* Set the global integer width (based upon revision of the DSDT) */
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if (i == acpi_gbl_dsdt_index) {
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acpi_ut_set_integer_width(new_table_desc->pointer->revision);
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}
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_tb_install_standard_table
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*
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* PARAMETERS: address - Address of the table (might be a virtual
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* address depending on the table_flags)
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* flags - Flags for the table
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* reload - Whether reload should be performed
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* override - Whether override should be performed
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* table_index - Where the table index is returned
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*
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* RETURN: Status
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*
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* DESCRIPTION: This function is called to verify and install an ACPI table.
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* When this function is called by "Load" or "LoadTable" opcodes,
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* or by acpi_load_table() API, the "Reload" parameter is set.
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* After successfully returning from this function, table is
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* "INSTALLED" but not "VALIDATED".
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*
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******************************************************************************/
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acpi_status
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acpi_tb_install_standard_table(acpi_physical_address address,
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u8 flags,
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u8 reload, u8 override, u32 *table_index)
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{
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u32 i;
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acpi_status status = AE_OK;
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struct acpi_table_desc new_table_desc;
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ACPI_FUNCTION_TRACE(tb_install_standard_table);
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/* Acquire a temporary table descriptor for validation */
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status = acpi_tb_acquire_temp_table(&new_table_desc, address, flags);
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if (ACPI_FAILURE(status)) {
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ACPI_ERROR((AE_INFO,
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"Could not acquire table length at %8.8X%8.8X",
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ACPI_FORMAT_UINT64(address)));
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return_ACPI_STATUS(status);
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}
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/*
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* Optionally do not load any SSDTs from the RSDT/XSDT. This can
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* be useful for debugging ACPI problems on some machines.
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*/
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if (!reload &&
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acpi_gbl_disable_ssdt_table_install &&
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ACPI_COMPARE_NAMESEG(&new_table_desc.signature, ACPI_SIG_SSDT)) {
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ACPI_INFO(("Ignoring installation of %4.4s at %8.8X%8.8X",
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new_table_desc.signature.ascii,
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ACPI_FORMAT_UINT64(address)));
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goto release_and_exit;
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}
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/* Acquire the table lock */
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(void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
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/* Validate and verify a table before installation */
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status = acpi_tb_verify_temp_table(&new_table_desc, NULL, &i);
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if (ACPI_FAILURE(status)) {
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if (status == AE_CTRL_TERMINATE) {
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/*
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* Table was unloaded, allow it to be reloaded.
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* As we are going to return AE_OK to the caller, we should
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* take the responsibility of freeing the input descriptor.
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* Refill the input descriptor to ensure
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* acpi_tb_install_table_with_override() can be called again to
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* indicate the re-installation.
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*/
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acpi_tb_uninstall_table(&new_table_desc);
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(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
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*table_index = i;
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return_ACPI_STATUS(AE_OK);
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}
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goto unlock_and_exit;
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}
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/* Add the table to the global root table list */
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acpi_tb_install_table_with_override(&new_table_desc, override,
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table_index);
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/* Invoke table handler */
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(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
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acpi_tb_notify_table(ACPI_TABLE_EVENT_INSTALL, new_table_desc.pointer);
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(void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
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unlock_and_exit:
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/* Release the table lock */
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(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
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release_and_exit:
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/* Release the temporary table descriptor */
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acpi_tb_release_temp_table(&new_table_desc);
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return_ACPI_STATUS(status);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_tb_override_table
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*
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* PARAMETERS: old_table_desc - Validated table descriptor to be
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* overridden
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*
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* RETURN: None
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*
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* DESCRIPTION: Attempt table override by calling the OSL override functions.
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* Note: If the table is overridden, then the entire new table
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* is acquired and returned by this function.
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* Before/after invocation, the table descriptor is in a state
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* that is "VALIDATED".
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*
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******************************************************************************/
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void acpi_tb_override_table(struct acpi_table_desc *old_table_desc)
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{
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acpi_status status;
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struct acpi_table_desc new_table_desc;
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struct acpi_table_header *table;
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acpi_physical_address address;
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u32 length;
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ACPI_ERROR_ONLY(char *override_type);
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/* (1) Attempt logical override (returns a logical address) */
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status = acpi_os_table_override(old_table_desc->pointer, &table);
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if (ACPI_SUCCESS(status) && table) {
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acpi_tb_acquire_temp_table(&new_table_desc,
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ACPI_PTR_TO_PHYSADDR(table),
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ACPI_TABLE_ORIGIN_EXTERNAL_VIRTUAL);
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ACPI_ERROR_ONLY(override_type = "Logical");
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goto finish_override;
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}
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/* (2) Attempt physical override (returns a physical address) */
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status = acpi_os_physical_table_override(old_table_desc->pointer,
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&address, &length);
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if (ACPI_SUCCESS(status) && address && length) {
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acpi_tb_acquire_temp_table(&new_table_desc, address,
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ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL);
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ACPI_ERROR_ONLY(override_type = "Physical");
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goto finish_override;
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}
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return; /* There was no override */
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finish_override:
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/*
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* Validate and verify a table before overriding, no nested table
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* duplication check as it's too complicated and unnecessary.
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*/
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status = acpi_tb_verify_temp_table(&new_table_desc, NULL, NULL);
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if (ACPI_FAILURE(status)) {
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return;
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}
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ACPI_INFO(("%4.4s 0x%8.8X%8.8X"
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" %s table override, new table: 0x%8.8X%8.8X",
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old_table_desc->signature.ascii,
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ACPI_FORMAT_UINT64(old_table_desc->address),
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override_type, ACPI_FORMAT_UINT64(new_table_desc.address)));
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/* We can now uninstall the original table */
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acpi_tb_uninstall_table(old_table_desc);
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/*
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* Replace the original table descriptor and keep its state as
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* "VALIDATED".
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*/
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acpi_tb_init_table_descriptor(old_table_desc, new_table_desc.address,
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new_table_desc.flags,
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new_table_desc.pointer);
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acpi_tb_validate_temp_table(old_table_desc);
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/* Release the temporary table descriptor */
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acpi_tb_release_temp_table(&new_table_desc);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_tb_uninstall_table
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*
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* PARAMETERS: table_desc - Table descriptor
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*
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* RETURN: None
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*
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* DESCRIPTION: Delete one internal ACPI table
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*
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******************************************************************************/
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void acpi_tb_uninstall_table(struct acpi_table_desc *table_desc)
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{
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ACPI_FUNCTION_TRACE(tb_uninstall_table);
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/* Table must be installed */
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if (!table_desc->address) {
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return_VOID;
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}
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acpi_tb_invalidate_table(table_desc);
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if ((table_desc->flags & ACPI_TABLE_ORIGIN_MASK) ==
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ACPI_TABLE_ORIGIN_INTERNAL_VIRTUAL) {
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ACPI_FREE(ACPI_PHYSADDR_TO_PTR(table_desc->address));
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}
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table_desc->address = ACPI_PTR_TO_PHYSADDR(NULL);
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return_VOID;
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}
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