ACPICA: Add override for dynamic tables
Add a call to acpi_os_table_override during the installation of a
dynamic table (loaded via the Load or LoadTable AML operators).
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
diff --git a/drivers/acpi/acpica/tbinstal.c b/drivers/acpi/acpica/tbinstal.c
index 37374b2..ef269a2 100644
--- a/drivers/acpi/acpica/tbinstal.c
+++ b/drivers/acpi/acpica/tbinstal.c
@@ -103,7 +103,9 @@
*
* RETURN: Status
*
- * DESCRIPTION: This function is called to add the ACPI table
+ * DESCRIPTION: This function is called to add an ACPI table. It is used to
+ * dynamically load tables via the Load and load_table AML
+ * operators.
*
******************************************************************************/
@@ -112,6 +114,7 @@
{
u32 i;
acpi_status status = AE_OK;
+ struct acpi_table_header *override_table = NULL;
ACPI_FUNCTION_TRACE(tb_add_table);
@@ -201,6 +204,29 @@
}
}
+ /*
+ * ACPI Table Override:
+ * Allow the host to override dynamically loaded tables.
+ */
+ status = acpi_os_table_override(table_desc->pointer, &override_table);
+ if (ACPI_SUCCESS(status) && override_table) {
+ ACPI_INFO((AE_INFO,
+ "%4.4s @ 0x%p Table override, replaced with:",
+ table_desc->pointer->signature,
+ ACPI_CAST_PTR(void, table_desc->address)));
+
+ /* We can delete the table that was passed as a parameter */
+
+ acpi_tb_delete_table(table_desc);
+
+ /* Setup descriptor for the new table */
+
+ table_desc->address = ACPI_PTR_TO_PHYSADDR(override_table);
+ table_desc->pointer = override_table;
+ table_desc->length = override_table->length;
+ table_desc->flags = ACPI_TABLE_ORIGIN_OVERRIDE;
+ }
+
/* Add the table to the global root table list */
status = acpi_tb_store_table(table_desc->address, table_desc->pointer,