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| author | Lv Zheng <lv.zheng@intel.com> | 2015-12-29 09:03:08 +0300 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2016-01-01 05:47:38 +0300 |
| commit | efaed9be998b5ae0afb7458e057e5f4402b43fa0 (patch) | |
| tree | 3a3e2cf962955b0ec491aa534e3de2659d2050ad /drivers/acpi/acpica/acobject.h | |
| parent | 849c25719ac6acc7420515c7b6324f4248a13790 (diff) | |
| download | linux-efaed9be998b5ae0afb7458e057e5f4402b43fa0.tar.xz | |
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>
Diffstat (limited to 'drivers/acpi/acpica/acobject.h')
| -rw-r--r-- | drivers/acpi/acpica/acobject.h | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/acpi/acpica/acobject.h b/drivers/acpi/acpica/acobject.h index 0bd02c4a5f75..2b154cfbe136 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 */ /****************************************************************************** * |