ACPICA: Events: Enhance acpi_ev_execute_reg_method() to ensure no _REG evaluations can happen during OS early boot stages
ACPICA commit 31178590dde82368fdb0f6b0e466b6c0add96c57
We can ensure no early _REG evaluations by ensuring the following rules in
acpi_ev_execute_reg_method():
1. If an address space handler is installed during early stage,
_REG(CONNECT) evaluations are blocked. This is achieved using
acpi_gbl_reg_methods_enabled which is renamed from
acpi_gbl_reg_methods_executed.
2. If _REG(CONNECT) has never been evalauted for the region object,
_REG(DISCONNECT) evaluations are blocked. This is achieved by a new
region object flag: AOPOBJ_REG_CONNECTED.
Note that, after applying this patch, we can ensure _REG(DISCONNECT) is
always paired to _REG(CONNECT). Lv Zheng
Link: https://github.com/acpica/acpica/commit/31178590
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
diff --git a/drivers/acpi/acpica/acobject.h b/drivers/acpi/acpica/acobject.h
index 0bd02c4..2b154cf 100644
--- a/drivers/acpi/acpica/acobject.h
+++ b/drivers/acpi/acpica/acobject.h
@@ -93,9 +93,10 @@
#define AOPOBJ_AML_CONSTANT 0x01 /* Integer is an AML constant */
#define AOPOBJ_STATIC_POINTER 0x02 /* Data is part of an ACPI table, don't delete */
#define AOPOBJ_DATA_VALID 0x04 /* Object is initialized and data is valid */
-#define AOPOBJ_OBJECT_INITIALIZED 0x08 /* Region is initialized, _REG was run */
-#define AOPOBJ_SETUP_COMPLETE 0x10 /* Region setup is complete */
-#define AOPOBJ_INVALID 0x20 /* Host OS won't allow a Region address */
+#define AOPOBJ_OBJECT_INITIALIZED 0x08 /* Region is initialized */
+#define AOPOBJ_REG_CONNECTED 0x10 /* _REG was run */
+#define AOPOBJ_SETUP_COMPLETE 0x20 /* Region setup is complete */
+#define AOPOBJ_INVALID 0x40 /* Host OS won't allow a Region address */
/******************************************************************************
*