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-rw-r--r--drivers/acpi/acpica/tbinstal.c304
1 files changed, 304 insertions, 0 deletions
diff --git a/drivers/acpi/acpica/tbinstal.c b/drivers/acpi/acpica/tbinstal.c
new file mode 100644
index 000000000..499efcaf7
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+++ b/drivers/acpi/acpica/tbinstal.c
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+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
+/******************************************************************************
+ *
+ * Module Name: tbinstal - ACPI table installation and removal
+ *
+ * Copyright (C) 2000 - 2022, Intel Corp.
+ *
+ *****************************************************************************/
+
+#include <acpi/acpi.h>
+#include "accommon.h"
+#include "actables.h"
+
+#define _COMPONENT ACPI_TABLES
+ACPI_MODULE_NAME("tbinstal")
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_tb_install_table_with_override
+ *
+ * PARAMETERS: new_table_desc - New table descriptor to install
+ * override - Whether override should be performed
+ * table_index - Where the table index is returned
+ *
+ * RETURN: None
+ *
+ * DESCRIPTION: Install an ACPI table into the global data structure. The
+ * table override mechanism is called to allow the host
+ * OS to replace any table before it is installed in the root
+ * table array.
+ *
+ ******************************************************************************/
+void
+acpi_tb_install_table_with_override(struct acpi_table_desc *new_table_desc,
+ u8 override, u32 *table_index)
+{
+ u32 i;
+ acpi_status status;
+
+ status = acpi_tb_get_next_table_descriptor(&i, NULL);
+ if (ACPI_FAILURE(status)) {
+ return;
+ }
+
+ /*
+ * ACPI Table Override:
+ *
+ * Before we install the table, let the host OS override it with a new
+ * one if desired. Any table within the RSDT/XSDT can be replaced,
+ * including the DSDT which is pointed to by the FADT.
+ */
+ if (override) {
+ acpi_tb_override_table(new_table_desc);
+ }
+
+ acpi_tb_init_table_descriptor(&acpi_gbl_root_table_list.tables[i],
+ new_table_desc->address,
+ new_table_desc->flags,
+ new_table_desc->pointer);
+
+ acpi_tb_print_table_header(new_table_desc->address,
+ new_table_desc->pointer);
+
+ /* This synchronizes acpi_gbl_dsdt_index */
+
+ *table_index = i;
+
+ /* Set the global integer width (based upon revision of the DSDT) */
+
+ if (i == acpi_gbl_dsdt_index) {
+ acpi_ut_set_integer_width(new_table_desc->pointer->revision);
+ }
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_tb_install_standard_table
+ *
+ * PARAMETERS: address - Address of the table (might be a virtual
+ * address depending on the table_flags)
+ * flags - Flags for the table
+ * table - Pointer to the table (required for virtual
+ * origins, optional for physical)
+ * reload - Whether reload should be performed
+ * override - Whether override should be performed
+ * table_index - Where the table index is returned
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: This function is called to verify and install an ACPI table.
+ * When this function is called by "Load" or "LoadTable" opcodes,
+ * or by acpi_load_table() API, the "Reload" parameter is set.
+ * After successfully returning from this function, table is
+ * "INSTALLED" but not "VALIDATED".
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_tb_install_standard_table(acpi_physical_address address,
+ u8 flags,
+ struct acpi_table_header *table,
+ u8 reload, u8 override, u32 *table_index)
+{
+ u32 i;
+ acpi_status status = AE_OK;
+ struct acpi_table_desc new_table_desc;
+
+ ACPI_FUNCTION_TRACE(tb_install_standard_table);
+
+ /* Acquire a temporary table descriptor for validation */
+
+ status =
+ acpi_tb_acquire_temp_table(&new_table_desc, address, flags, table);
+ if (ACPI_FAILURE(status)) {
+ ACPI_ERROR((AE_INFO,
+ "Could not acquire table length at %8.8X%8.8X",
+ ACPI_FORMAT_UINT64(address)));
+ return_ACPI_STATUS(status);
+ }
+
+ /*
+ * Optionally do not load any SSDTs from the RSDT/XSDT. This can
+ * be useful for debugging ACPI problems on some machines.
+ */
+ if (!reload &&
+ acpi_gbl_disable_ssdt_table_install &&
+ ACPI_COMPARE_NAMESEG(&new_table_desc.signature, ACPI_SIG_SSDT)) {
+ ACPI_INFO(("Ignoring installation of %4.4s at %8.8X%8.8X",
+ new_table_desc.signature.ascii,
+ ACPI_FORMAT_UINT64(address)));
+ goto release_and_exit;
+ }
+
+ /* Acquire the table lock */
+
+ (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
+
+ /* Validate and verify a table before installation */
+
+ status = acpi_tb_verify_temp_table(&new_table_desc, NULL, &i);
+ if (ACPI_FAILURE(status)) {
+ if (status == AE_CTRL_TERMINATE) {
+ /*
+ * Table was unloaded, allow it to be reloaded.
+ * As we are going to return AE_OK to the caller, we should
+ * take the responsibility of freeing the input descriptor.
+ * Refill the input descriptor to ensure
+ * acpi_tb_install_table_with_override() can be called again to
+ * indicate the re-installation.
+ */
+ acpi_tb_uninstall_table(&new_table_desc);
+ (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
+ *table_index = i;
+ return_ACPI_STATUS(AE_OK);
+ }
+ goto unlock_and_exit;
+ }
+
+ /* Add the table to the global root table list */
+
+ acpi_tb_install_table_with_override(&new_table_desc, override,
+ table_index);
+
+ /* Invoke table handler */
+
+ (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
+ acpi_tb_notify_table(ACPI_TABLE_EVENT_INSTALL, new_table_desc.pointer);
+ (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
+
+unlock_and_exit:
+
+ /* Release the table lock */
+
+ (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
+
+release_and_exit:
+
+ /* Release the temporary table descriptor */
+
+ acpi_tb_release_temp_table(&new_table_desc);
+ return_ACPI_STATUS(status);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_tb_override_table
+ *
+ * PARAMETERS: old_table_desc - Validated table descriptor to be
+ * overridden
+ *
+ * RETURN: None
+ *
+ * DESCRIPTION: Attempt table override by calling the OSL override functions.
+ * Note: If the table is overridden, then the entire new table
+ * is acquired and returned by this function.
+ * Before/after invocation, the table descriptor is in a state
+ * that is "VALIDATED".
+ *
+ ******************************************************************************/
+
+void acpi_tb_override_table(struct acpi_table_desc *old_table_desc)
+{
+ acpi_status status;
+ struct acpi_table_desc new_table_desc;
+ struct acpi_table_header *table;
+ acpi_physical_address address;
+ u32 length;
+ ACPI_ERROR_ONLY(char *override_type);
+
+ /* (1) Attempt logical override (returns a logical address) */
+
+ status = acpi_os_table_override(old_table_desc->pointer, &table);
+ if (ACPI_SUCCESS(status) && table) {
+ acpi_tb_acquire_temp_table(&new_table_desc,
+ ACPI_PTR_TO_PHYSADDR(table),
+ ACPI_TABLE_ORIGIN_EXTERNAL_VIRTUAL,
+ table);
+ ACPI_ERROR_ONLY(override_type = "Logical");
+ goto finish_override;
+ }
+
+ /* (2) Attempt physical override (returns a physical address) */
+
+ status = acpi_os_physical_table_override(old_table_desc->pointer,
+ &address, &length);
+ if (ACPI_SUCCESS(status) && address && length) {
+ acpi_tb_acquire_temp_table(&new_table_desc, address,
+ ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL,
+ NULL);
+ ACPI_ERROR_ONLY(override_type = "Physical");
+ goto finish_override;
+ }
+
+ return; /* There was no override */
+
+finish_override:
+
+ /*
+ * Validate and verify a table before overriding, no nested table
+ * duplication check as it's too complicated and unnecessary.
+ */
+ status = acpi_tb_verify_temp_table(&new_table_desc, NULL, NULL);
+ if (ACPI_FAILURE(status)) {
+ return;
+ }
+
+ ACPI_INFO(("%4.4s 0x%8.8X%8.8X"
+ " %s table override, new table: 0x%8.8X%8.8X",
+ old_table_desc->signature.ascii,
+ ACPI_FORMAT_UINT64(old_table_desc->address),
+ override_type, ACPI_FORMAT_UINT64(new_table_desc.address)));
+
+ /* We can now uninstall the original table */
+
+ acpi_tb_uninstall_table(old_table_desc);
+
+ /*
+ * Replace the original table descriptor and keep its state as
+ * "VALIDATED".
+ */
+ acpi_tb_init_table_descriptor(old_table_desc, new_table_desc.address,
+ new_table_desc.flags,
+ new_table_desc.pointer);
+ acpi_tb_validate_temp_table(old_table_desc);
+
+ /* Release the temporary table descriptor */
+
+ acpi_tb_release_temp_table(&new_table_desc);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_tb_uninstall_table
+ *
+ * PARAMETERS: table_desc - Table descriptor
+ *
+ * RETURN: None
+ *
+ * DESCRIPTION: Delete one internal ACPI table
+ *
+ ******************************************************************************/
+
+void acpi_tb_uninstall_table(struct acpi_table_desc *table_desc)
+{
+
+ ACPI_FUNCTION_TRACE(tb_uninstall_table);
+
+ /* Table must be installed */
+
+ if (!table_desc->address) {
+ return_VOID;
+ }
+
+ acpi_tb_invalidate_table(table_desc);
+
+ if ((table_desc->flags & ACPI_TABLE_ORIGIN_MASK) ==
+ ACPI_TABLE_ORIGIN_INTERNAL_VIRTUAL) {
+ ACPI_FREE(table_desc->pointer);
+ table_desc->pointer = NULL;
+ }
+
+ table_desc->address = ACPI_PTR_TO_PHYSADDR(NULL);
+ return_VOID;
+}