Add new external interface, AcpiUnloadTable

Unload a table via the TableIndex.
acpica · Sep 26, 2019 · c69369c · c69369c
1 parent 98fc399
commit c69369c
Show file tree

Hide file tree

Showing 2 changed files with 44 additions and 0 deletions.
diff --git a/source/components/tables/tbxfload.c b/source/components/tables/tbxfload.c
@@ -582,3 +582,42 @@ AcpiUnloadParentTable (
 }
 
 ACPI_EXPORT_SYMBOL (AcpiUnloadParentTable)
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    AcpiUnloadTable
+ *
+ * PARAMETERS:  TableIndex          - Index as returned by AcpiLoadTable
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Via the TableIndex representing an SSDT or OEMx table, unloads
+ *              the table and deletes all namespace objects associated with
+ *              that table. Unloading of the DSDT is not allowed.
+ *              Note: Mainly intended to support hotplug removal of SSDTs.
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+AcpiUnloadTable (
+    UINT32                  TableIndex)
+{
+    ACPI_STATUS             Status;
+
+
+    ACPI_FUNCTION_TRACE (AcpiUnloadTable);
+
+
+    if (TableIndex == 1)
+    {
+        /* TableIndex==1 means DSDT is the owner. DSDT cannot be unloaded */
+
+        return_ACPI_STATUS (AE_TYPE);
+    }
+
+    Status = AcpiTbUnloadTable (TableIndex);
+    return_ACPI_STATUS (Status);
+}
+
+ACPI_EXPORT_SYMBOL (AcpiUnloadTable)
diff --git a/source/include/acpixf.h b/source/include/acpixf.h
@@ -666,6 +666,11 @@ ACPI_STATUS
 AcpiLoadTable (
     ACPI_TABLE_HEADER       *Table))
 
+ACPI_EXTERNAL_RETURN_STATUS (
+ACPI_STATUS
+AcpiUnloadTable (
+    UINT32                  TableIndex))
+
 ACPI_EXTERNAL_RETURN_STATUS (
 ACPI_STATUS
 AcpiUnloadParentTable (