2005-04-16 16:20:36 -06:00
|
|
|
/******************************************************************************
|
|
|
|
*
|
|
|
|
* Module Name: nsload - namespace loading/expanding/contracting procedures
|
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|
|
*
|
|
|
|
*****************************************************************************/
|
|
|
|
|
|
|
|
/*
|
2017-02-07 20:00:08 -07:00
|
|
|
* Copyright (C) 2000 - 2017, Intel Corp.
|
2005-04-16 16:20:36 -06:00
|
|
|
* All rights reserved.
|
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*
|
|
|
|
* Redistribution and use in source and binary forms, with or without
|
|
|
|
* modification, are permitted provided that the following conditions
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|
* are met:
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|
|
* 1. Redistributions of source code must retain the above copyright
|
|
|
|
* notice, this list of conditions, and the following disclaimer,
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|
|
* without modification.
|
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|
|
* 2. Redistributions in binary form must reproduce at minimum a disclaimer
|
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|
|
* substantially similar to the "NO WARRANTY" disclaimer below
|
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|
|
* ("Disclaimer") and any redistribution must be conditioned upon
|
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|
|
* including a substantially similar Disclaimer requirement for further
|
|
|
|
* binary redistribution.
|
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|
|
* 3. Neither the names of the above-listed copyright holders nor the names
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|
* of any contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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|
|
* GNU General Public License ("GPL") version 2 as published by the Free
|
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|
|
* Software Foundation.
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*
|
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
|
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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|
* POSSIBILITY OF SUCH DAMAGES.
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|
*/
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|
|
#include <acpi/acpi.h>
|
2009-01-08 22:30:03 -07:00
|
|
|
#include "accommon.h"
|
|
|
|
#include "acnamesp.h"
|
|
|
|
#include "acdispat.h"
|
|
|
|
#include "actables.h"
|
ACPICA: Namespace: Fix dynamic table loading issues
ACPICA commit 767ee53354e0c4b7e8e7c57c6dd7bf569f0d52bb
There are issues related to the namespace/interpreter locks, which causes
several ACPI functionalities not specification compliant. The lock issues
were detectec when we were trying to fix the functionalities (please see
Link # [1] for the details).
What's the lock issues? Let's first look into the namespace/interpreter
lock usages inside of the object evaluation and the table loading which are
the key AML interpretion code paths:
Table loading:
acpi_ns_load_table
L(Namespace)
acpi_ns_parse_table
acpi_ns_one_complete_parse(LOAD_PASS1/LOAD_PASS2)
acpi_ds_load1_begion_op
acpi_ds_load1_end_op
acpi_ds_load2_begion_op
acpi_ds_load2_end_op
U(Namespace)
Object evaluation:
acpi_ns_evaluate
L(Interpreter)
acpi_ps_execute_method
acpi_ds_exec_begin_op
acpi_ds_exec_end_op
U(Interpreter)
acpi_ns_load_table
L(Namespace)
U(Namespace)
acpi_ev_initialize_region
L(Namespace)
U(Namespace)
address_space.Setup
address_space.Handler
acpi_os_wait_semaphore
acpi_os_acquire_mutex
acpi_os_sleep
L(Interpreter)
U(Interpreter)
L(Interpreter)
acpi_ex_resolve_node_to_value
U(Interpreter)
acpi_ns_check_return_value
Where:
1. L(Interpreter) means acquire(MTX_INTERPRETER);
2. U(Interpreter) means release(MTX_INTERPRETER);
3. L(Namespace) means acquire(MTX_NAMESPACE);
4. U(Namespace) means release(MTX_NAMESPACE);
We can see that acpi_ns_exec_module_code() (which invokes acpi_ns_evaluate) is
implemented in a deferred way just in order to avoid to reacquire the
namespace lock. This is in fact the root cause of many other ACPICA issues:
1. We now know for sure that the module code should be executed right in
place by the Windows AML interpreter. So in the current design, if
the region initializations/accesses or the table loadings (where the
namespace surely should be locked again) happening during the table
loading period, dead lock could happen because ACPICA never unlocks the
namespace during the AML interpretion.
2. ACPICA interpreter just ensures that all static namespace nodes (named
objects created during the acpi_load_tables()) are created
(acpi_ns_lookup()) with the correct lock held, but doesn't ensure that
the named objects created by the control method are created with the
same correct lock held. It requires the control methods to be executed
in a serial way after "loading a table", that's why ACPICA requires
method auto serialization.
This patch fixes these software design issues by extending interpreter
enter/exit APIs to hold both interpreter/namespace locks to ensure the lock
order correctness, so that we can get these code paths:
Table loading:
acpi_ns_load_table
E(Interpreter)
acpi_ns_parse_table
acpi_ns_one_complete_parse
acpi_ns_execute_table
X(Interpreter)
acpi_ns_load_table
acpi_ev_initialize_region
address_space.Setup
address_space.Handler
acpi_os_wait_semaphore
acpi_os_acquire_mutex
acpi_os_sleep
E(Interpreter)
X(Interpreter)
Object evaluation:
acpi_ns_evaluate
E(Interpreter)
acpi_ps_execute_method
X(Interpreter)
acpi_ns_load_table
acpi_ev_initialize_region
address_space.Setup
address_space.Handler
acpi_os_wait_semaphore
acpi_os_acquire_mutex
acpi_os_sleep
E(Interpreter)
X(Interpreter)
Where:
1. E(Interpreter) means acquire(MTX_INTERPRETER, MTX_NAMESPACE);
2. X(Interpreter) means release(MTX_NAMESPACE, MTX_INTERPRETER);
After this change, we can see:
1. All namespace nodes creations are locked by the namespace lock.
2. All namespace nodes referencing are locked with the same lock.
3. But we also can notice a defact that, all namespace nodes deletions
could be affected by this change. As a consequence,
acpi_ns_delete_namespace_subtree() may delete a static namespace node that
is still referenced by the interpreter (for example, the parser scopes).
Currently, we needn't worry about the last defact because in ACPICA, table
unloading is not fully functioning, its design strictly relies on the fact
that when the namespace deletion happens, either the AML table or the OSPMs
should have been notified and thus either the AML table or the OSPMs
shouldn't reference deletion-related namespace nodes during the namespace
deletion. And this change still works with the above restrictions applied.
While making this a-step-forward helps us to correct the wrong grammar to
pull many things back to the correct rail. And pulling things back to the
correct rail in return makes it possible for us to support fully
functioning table unloading after doing many cleanups.
While this patch is generated, all namespace locks are examined to ensure
that they can meet either of the following pattens:
1. L(Namespace)
U(Namespace)
2. E(Interpreter)
X(Interpreter)
3. E(Interpreter)
X(Interpreter)
L(Namespace)
U(Namespace)
E(Interpreter)
X(Interpreter)
We ensure this by adding X(Interpreter)/E(Interpreter) or removing
U(Namespace)/L(Namespace) for those currently are executed in the following
order:
E(Interpreter)
L(Namespace)
U(Namespace)
X(Interpreter)
And adding E(Interpreter)/X(Interpreter) for those currently are executed
in the following order:
X(Interpreter)
E(Interpreter)
Originally, the interpreter lock is held for the execution AML opcodes, the
namespace lock is held for the named object creation AML opcodes. Since
they are actually same in MS interpreter (can all be executed during the
table loading), we can combine the 2 locks and tune the locking code better
in this way. Lv Zheng.
Link: https://bugzilla.kernel.org/show_bug.cgi?id=153541 # [1]
Link: https://bugzilla.kernel.org/show_bug.cgi?id=121701 # [1]
Link: https://bugs.acpica.org/show_bug.cgi?id=1323
Link: https://github.com/acpica/acpica/commit/767ee533
Reported-and-tested-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reported-and-tested-by: Greg White <gwhite@kupulau.com>
Reported-and-tested-by: Dutch Guy <lucht_piloot@gmx.net>
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>
2016-09-07 00:07:10 -06:00
|
|
|
#include "acinterp.h"
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
#define _COMPONENT ACPI_NAMESPACE
|
2005-08-04 22:44:28 -06:00
|
|
|
ACPI_MODULE_NAME("nsload")
|
2005-04-16 16:20:36 -06:00
|
|
|
|
2005-04-18 20:49:35 -06:00
|
|
|
/* Local prototypes */
|
|
|
|
#ifdef ACPI_FUTURE_IMPLEMENTATION
|
2005-08-04 22:44:28 -06:00
|
|
|
acpi_status acpi_ns_unload_namespace(acpi_handle handle);
|
2005-04-18 20:49:35 -06:00
|
|
|
|
2005-08-04 22:44:28 -06:00
|
|
|
static acpi_status acpi_ns_delete_subtree(acpi_handle start_handle);
|
2005-04-18 20:49:35 -06:00
|
|
|
#endif
|
2005-04-16 16:20:36 -06:00
|
|
|
|
2005-04-18 20:49:35 -06:00
|
|
|
#ifndef ACPI_NO_METHOD_EXECUTION
|
2005-04-16 16:20:36 -06:00
|
|
|
/*******************************************************************************
|
|
|
|
*
|
|
|
|
* FUNCTION: acpi_ns_load_table
|
|
|
|
*
|
2007-02-02 09:48:18 -07:00
|
|
|
* PARAMETERS: table_index - Index for table to be loaded
|
2012-07-11 19:40:10 -06:00
|
|
|
* node - Owning NS node
|
2005-04-16 16:20:36 -06:00
|
|
|
*
|
|
|
|
* RETURN: Status
|
|
|
|
*
|
|
|
|
* DESCRIPTION: Load one ACPI table into the namespace
|
|
|
|
*
|
|
|
|
******************************************************************************/
|
|
|
|
|
|
|
|
acpi_status
|
2008-06-09 23:42:13 -06:00
|
|
|
acpi_ns_load_table(u32 table_index, struct acpi_namespace_node *node)
|
2005-04-16 16:20:36 -06:00
|
|
|
{
|
2005-08-04 22:44:28 -06:00
|
|
|
acpi_status status;
|
2005-04-16 16:20:36 -06:00
|
|
|
|
ACPI: ACPICA 20060421
Removed a device initialization optimization introduced in
20051216 where the _STA method was not run unless an _INI
was also present for the same device. This optimization
could cause problems because it could allow _INI methods
to be run within a not-present device subtree (If a
not-present device had no _INI, _STA would not be run,
the not-present status would not be discovered, and the
children of the device would be incorrectly traversed.)
Implemented a new _STA optimization where namespace
subtrees that do not contain _INI are identified and
ignored during device initialization. Selectively running
_STA can significantly improve boot time on large machines
(with assistance from Len Brown.)
Implemented support for the device initialization case
where the returned _STA flags indicate a device not-present
but functioning. In this case, _INI is not run, but the
device children are examined for presence, as per the
ACPI specification.
Implemented an additional change to the IndexField support
in order to conform to MS behavior. The value written to
the Index Register is not simply a byte offset, it is a
byte offset in units of the access width of the parent
Index Field. (Fiodor Suietov)
Defined and deployed a new OSL interface,
acpi_os_validate_address(). This interface is called during
the creation of all AML operation regions, and allows
the host OS to exert control over what addresses it will
allow the AML code to access. Operation Regions whose
addresses are disallowed will cause a runtime exception
when they are actually accessed (will not affect or abort
table loading.)
Defined and deployed a new OSL interface,
acpi_os_validate_interface(). This interface allows the host OS
to match the various "optional" interface/behavior strings
for the _OSI predefined control method as appropriate
(with assistance from Bjorn Helgaas.)
Restructured and corrected various problems in the
exception handling code paths within DsCallControlMethod
and DsTerminateControlMethod in dsmethod (with assistance
from Takayoshi Kochi.)
Modified the Linux source converter to ignore quoted string
literals while converting identifiers from mixed to lower
case. This will correct problems with the disassembler
and other areas where such strings must not be modified.
The ACPI_FUNCTION_* macros no longer require quotes around
the function name. This allows the Linux source converter
to convert the names, now that the converter ignores
quoted strings.
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
2006-04-21 15:15:00 -06:00
|
|
|
ACPI_FUNCTION_TRACE(ns_load_table);
|
2005-04-16 16:20:36 -06:00
|
|
|
|
2007-02-02 09:48:18 -07:00
|
|
|
/* If table already loaded into namespace, just return */
|
|
|
|
|
|
|
|
if (acpi_tb_is_table_loaded(table_index)) {
|
|
|
|
status = AE_ALREADY_EXISTS;
|
|
|
|
goto unlock;
|
|
|
|
}
|
|
|
|
|
2005-08-04 22:44:28 -06:00
|
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
|
|
|
|
"**** Loading table into namespace ****\n"));
|
2005-04-16 16:20:36 -06:00
|
|
|
|
2007-02-02 09:48:18 -07:00
|
|
|
status = acpi_tb_allocate_owner_id(table_index);
|
2005-08-04 22:44:28 -06:00
|
|
|
if (ACPI_FAILURE(status)) {
|
2007-02-02 09:48:18 -07:00
|
|
|
goto unlock;
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
|
|
|
|
ACPICA: Namespace: Fix dynamic table loading issues
ACPICA commit 767ee53354e0c4b7e8e7c57c6dd7bf569f0d52bb
There are issues related to the namespace/interpreter locks, which causes
several ACPI functionalities not specification compliant. The lock issues
were detectec when we were trying to fix the functionalities (please see
Link # [1] for the details).
What's the lock issues? Let's first look into the namespace/interpreter
lock usages inside of the object evaluation and the table loading which are
the key AML interpretion code paths:
Table loading:
acpi_ns_load_table
L(Namespace)
acpi_ns_parse_table
acpi_ns_one_complete_parse(LOAD_PASS1/LOAD_PASS2)
acpi_ds_load1_begion_op
acpi_ds_load1_end_op
acpi_ds_load2_begion_op
acpi_ds_load2_end_op
U(Namespace)
Object evaluation:
acpi_ns_evaluate
L(Interpreter)
acpi_ps_execute_method
acpi_ds_exec_begin_op
acpi_ds_exec_end_op
U(Interpreter)
acpi_ns_load_table
L(Namespace)
U(Namespace)
acpi_ev_initialize_region
L(Namespace)
U(Namespace)
address_space.Setup
address_space.Handler
acpi_os_wait_semaphore
acpi_os_acquire_mutex
acpi_os_sleep
L(Interpreter)
U(Interpreter)
L(Interpreter)
acpi_ex_resolve_node_to_value
U(Interpreter)
acpi_ns_check_return_value
Where:
1. L(Interpreter) means acquire(MTX_INTERPRETER);
2. U(Interpreter) means release(MTX_INTERPRETER);
3. L(Namespace) means acquire(MTX_NAMESPACE);
4. U(Namespace) means release(MTX_NAMESPACE);
We can see that acpi_ns_exec_module_code() (which invokes acpi_ns_evaluate) is
implemented in a deferred way just in order to avoid to reacquire the
namespace lock. This is in fact the root cause of many other ACPICA issues:
1. We now know for sure that the module code should be executed right in
place by the Windows AML interpreter. So in the current design, if
the region initializations/accesses or the table loadings (where the
namespace surely should be locked again) happening during the table
loading period, dead lock could happen because ACPICA never unlocks the
namespace during the AML interpretion.
2. ACPICA interpreter just ensures that all static namespace nodes (named
objects created during the acpi_load_tables()) are created
(acpi_ns_lookup()) with the correct lock held, but doesn't ensure that
the named objects created by the control method are created with the
same correct lock held. It requires the control methods to be executed
in a serial way after "loading a table", that's why ACPICA requires
method auto serialization.
This patch fixes these software design issues by extending interpreter
enter/exit APIs to hold both interpreter/namespace locks to ensure the lock
order correctness, so that we can get these code paths:
Table loading:
acpi_ns_load_table
E(Interpreter)
acpi_ns_parse_table
acpi_ns_one_complete_parse
acpi_ns_execute_table
X(Interpreter)
acpi_ns_load_table
acpi_ev_initialize_region
address_space.Setup
address_space.Handler
acpi_os_wait_semaphore
acpi_os_acquire_mutex
acpi_os_sleep
E(Interpreter)
X(Interpreter)
Object evaluation:
acpi_ns_evaluate
E(Interpreter)
acpi_ps_execute_method
X(Interpreter)
acpi_ns_load_table
acpi_ev_initialize_region
address_space.Setup
address_space.Handler
acpi_os_wait_semaphore
acpi_os_acquire_mutex
acpi_os_sleep
E(Interpreter)
X(Interpreter)
Where:
1. E(Interpreter) means acquire(MTX_INTERPRETER, MTX_NAMESPACE);
2. X(Interpreter) means release(MTX_NAMESPACE, MTX_INTERPRETER);
After this change, we can see:
1. All namespace nodes creations are locked by the namespace lock.
2. All namespace nodes referencing are locked with the same lock.
3. But we also can notice a defact that, all namespace nodes deletions
could be affected by this change. As a consequence,
acpi_ns_delete_namespace_subtree() may delete a static namespace node that
is still referenced by the interpreter (for example, the parser scopes).
Currently, we needn't worry about the last defact because in ACPICA, table
unloading is not fully functioning, its design strictly relies on the fact
that when the namespace deletion happens, either the AML table or the OSPMs
should have been notified and thus either the AML table or the OSPMs
shouldn't reference deletion-related namespace nodes during the namespace
deletion. And this change still works with the above restrictions applied.
While making this a-step-forward helps us to correct the wrong grammar to
pull many things back to the correct rail. And pulling things back to the
correct rail in return makes it possible for us to support fully
functioning table unloading after doing many cleanups.
While this patch is generated, all namespace locks are examined to ensure
that they can meet either of the following pattens:
1. L(Namespace)
U(Namespace)
2. E(Interpreter)
X(Interpreter)
3. E(Interpreter)
X(Interpreter)
L(Namespace)
U(Namespace)
E(Interpreter)
X(Interpreter)
We ensure this by adding X(Interpreter)/E(Interpreter) or removing
U(Namespace)/L(Namespace) for those currently are executed in the following
order:
E(Interpreter)
L(Namespace)
U(Namespace)
X(Interpreter)
And adding E(Interpreter)/X(Interpreter) for those currently are executed
in the following order:
X(Interpreter)
E(Interpreter)
Originally, the interpreter lock is held for the execution AML opcodes, the
namespace lock is held for the named object creation AML opcodes. Since
they are actually same in MS interpreter (can all be executed during the
table loading), we can combine the 2 locks and tune the locking code better
in this way. Lv Zheng.
Link: https://bugzilla.kernel.org/show_bug.cgi?id=153541 # [1]
Link: https://bugzilla.kernel.org/show_bug.cgi?id=121701 # [1]
Link: https://bugs.acpica.org/show_bug.cgi?id=1323
Link: https://github.com/acpica/acpica/commit/767ee533
Reported-and-tested-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reported-and-tested-by: Greg White <gwhite@kupulau.com>
Reported-and-tested-by: Dutch Guy <lucht_piloot@gmx.net>
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>
2016-09-07 00:07:10 -06:00
|
|
|
/*
|
|
|
|
* Parse the table and load the namespace with all named
|
|
|
|
* objects found within. Control methods are NOT parsed
|
|
|
|
* at this time. In fact, the control methods cannot be
|
|
|
|
* parsed until the entire namespace is loaded, because
|
|
|
|
* if a control method makes a forward reference (call)
|
|
|
|
* to another control method, we can't continue parsing
|
|
|
|
* because we don't know how many arguments to parse next!
|
|
|
|
*/
|
2008-04-10 09:06:39 -06:00
|
|
|
status = acpi_ns_parse_table(table_index, node);
|
2007-02-02 09:48:18 -07:00
|
|
|
if (ACPI_SUCCESS(status)) {
|
|
|
|
acpi_tb_set_table_loaded_flag(table_index, TRUE);
|
|
|
|
} else {
|
2015-08-24 20:28:26 -06:00
|
|
|
/*
|
|
|
|
* On error, delete any namespace objects created by this table.
|
|
|
|
* We cannot initialize these objects, so delete them. There are
|
|
|
|
* a couple of expecially bad cases:
|
|
|
|
* AE_ALREADY_EXISTS - namespace collision.
|
|
|
|
* AE_NOT_FOUND - the target of a Scope operator does not
|
|
|
|
* exist. This target of Scope must already exist in the
|
|
|
|
* namespace, as per the ACPI specification.
|
|
|
|
*/
|
|
|
|
acpi_ns_delete_namespace_by_owner(acpi_gbl_root_table_list.
|
|
|
|
tables[table_index].owner_id);
|
|
|
|
|
2016-03-23 19:38:28 -06:00
|
|
|
acpi_tb_release_owner_id(table_index);
|
2015-08-24 20:28:26 -06:00
|
|
|
return_ACPI_STATUS(status);
|
2007-02-02 09:48:18 -07:00
|
|
|
}
|
|
|
|
|
2013-10-28 19:30:02 -06:00
|
|
|
unlock:
|
2005-08-04 22:44:28 -06:00
|
|
|
if (ACPI_FAILURE(status)) {
|
|
|
|
return_ACPI_STATUS(status);
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
2012-10-30 20:26:55 -06:00
|
|
|
* Now we can parse the control methods. We always parse
|
2005-04-16 16:20:36 -06:00
|
|
|
* them here for a sanity check, and if configured for
|
|
|
|
* just-in-time parsing, we delete the control method
|
|
|
|
* parse trees.
|
|
|
|
*/
|
2005-08-04 22:44:28 -06:00
|
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
|
2014-03-24 00:49:00 -06:00
|
|
|
"**** Begin Table Object Initialization\n"));
|
2005-04-16 16:20:36 -06:00
|
|
|
|
2016-10-26 01:42:01 -06:00
|
|
|
acpi_ex_enter_interpreter();
|
2007-02-02 09:48:18 -07:00
|
|
|
status = acpi_ds_initialize_objects(table_index, node);
|
2016-10-26 01:42:01 -06:00
|
|
|
acpi_ex_exit_interpreter();
|
2005-04-16 16:20:36 -06:00
|
|
|
|
2005-08-04 22:44:28 -06:00
|
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
|
2014-03-24 00:49:00 -06:00
|
|
|
"**** Completed Table Object Initialization\n"));
|
2005-04-16 16:20:36 -06:00
|
|
|
|
2015-12-28 23:04:19 -07:00
|
|
|
/*
|
|
|
|
* Execute any module-level code that was detected during the table load
|
|
|
|
* phase. Although illegal since ACPI 2.0, there are many machines that
|
|
|
|
* contain this type of code. Each block of detected executable AML code
|
|
|
|
* outside of any control method is wrapped with a temporary control
|
|
|
|
* method object and placed on a global list. The methods on this list
|
|
|
|
* are executed below.
|
|
|
|
*
|
|
|
|
* This case executes the module-level code for each table immediately
|
|
|
|
* after the table has been loaded. This provides compatibility with
|
|
|
|
* other ACPI implementations. Optionally, the execution can be deferred
|
|
|
|
* until later, see acpi_initialize_objects.
|
|
|
|
*/
|
ACPICA: Interpreter: Fix MLC issues by switching to new term_list grammar for table loading
ACPICA commit 0e24fb67cde08d7df7671d7d7b183490dc79707e
The MLC (Module Level Code) is an ACPICA terminology describing the AML
code out of any control method, its support is an indication of the
interpreter behavior during the table loading.
The original implementation of MLC in ACPICA had several issues:
1. Out of any control method, besides of the object creating opcodes, only
the code blocks wrapped by "If/Else/While" opcodes were supported.
2. The supported MLC code blocks were executed after loading the table
rather than being executed right in place.
============================================================
The demo of this order issue is as follows:
Name (OBJ1, 1)
If (CND1 == 1)
{
Name (OBJ2, 2)
}
Name (OBJ3, 3)
The original MLC support created OBJ2 after OBJ3's creation.
============================================================
Other than these limitations, MLC support in ACPICA looks correct. And
supporting this should be easy/natural for ACPICA, but enabling of this was
blocked by some ACPICA internal and OSPM specific initialization order
issues we've fixed recently. The wrong support started from the following
false bug fixing commit:
Commit: 7f0c826a437157d2b19662977e9cf3b472cf24a6
Subject: ACPICA: Add support for module-level executable AML code
Commit: 9a884ab64a4d092b4c3bf24fd9a30f7fbd4591e7
Subject: ACPICA: Add additional module-level code support
...
We can confirm Windows interpreter behavior via reverse engineering means.
It can be proven that not only If/Else/While wrapped code blocks, all
opcodes can be executed at the module level, including operation region
accesses. And it can be proven that the MLC should be executed right in
place, not in such a deferred way executed after loading the table.
And the above facts indeed reflect the spec words around ACPI definition
block tables (DSDT/SSDT/...), the entire table and the Scope object is
defined by the AML specification in BNF style as:
AMLCode := def_block_header term_list
def_scope := scope_op pkg_length name_string term_list
The bodies of the scope opening terms (AMLCode/Scope) are all term_list,
thus the table loading should be no difference than the control method
evaluations as the body of the Method is also defined by the AML
specification as term_list:
def_method := method_op pkg_length name_string method_flags term_list
The only difference is: after evaluating control method, created named
objects may be freed due to no reference, while named objects created by
the table loading should only be freed after unloading the table.
So this patch follows the spec and the de-facto standard behavior, enables
the new grammar (term_list) for the table loading.
By doing so, beyond the fixes to the above issues, we can see additional
differences comparing to the old grammar based table loading:
1. Originally, beyond the scope opening terms (AMLCode/Scope),
If/Else/While wrapped code blocks under the scope creating terms
(Device/power_resource/Processor/thermal_zone) are also supported as
deferred MLC, which violates the spec defined grammar where object_list
is enforced. With MLC support improved as non-deferred, the interpreter
parses such scope creating terms as term_list rather object_list like the
scope opening terms.
After probing the Windows behavior and proving that it also parses these
terms as term_list, we submitted an ECR (Engineering Change Request) to
the ASWG (ACPI Specification Working Group) to clarify this. The ECR is
titled as "ASL Grammar Clarification for Executable AML Opcodes" and has
been accepted by the ASWG. The new grammar will appear in ACPI
specification 6.2.
2. Originally, Buffer/Package/operation_region/create_XXXField/bank_field
arguments are evaluated in a deferred way after loading the table. With
MLC support improved, they are also parsed right in place during the
table loading.
This is also Windows compliant and the only difference is the removal
of the debugging messages implemented before acpi_ds_execute_arguments(),
see Link # [1] for the details. A previous commit should have ensured
that acpi_check_address_range() won't regress.
Note that enabling this feature may cause regressions due to long term
Linux ACPI support on top of the wrong grammar. So this patch also prepares
a global option to be used to roll back to the old grammar during the
period between a regression is reported and the regression is
root-cause-fixed. Lv Zheng.
Link: https://bugzilla.kernel.org/show_bug.cgi?id=112911 # [1]
Link: https://bugzilla.kernel.org/show_bug.cgi?id=117671 # [1]
Link: https://bugzilla.kernel.org/show_bug.cgi?id=153541 # [1]
Link: https://github.com/acpica/acpica/issues/122
Link: https://bugs.acpica.org/show_bug.cgi?id=963
Link: https://github.com/acpica/acpica/commit/0e24fb67
Reported-and-tested-by: Chris Bainbridge <chris.bainbridge@gmail.com>
Reported-by: Ehsan <dashesy@gmail.com>
Reported-and-tested-by: Dutch Guy <lucht_piloot@gmx.net>
Tested-by: Mika Westerberg <mika.westerberg@linux.intel.com>
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>
2016-09-07 00:06:54 -06:00
|
|
|
if (!acpi_gbl_parse_table_as_term_list
|
|
|
|
&& !acpi_gbl_group_module_level_code) {
|
2015-12-28 23:04:19 -07:00
|
|
|
acpi_ns_exec_module_code_list();
|
|
|
|
}
|
|
|
|
|
2005-08-04 22:44:28 -06:00
|
|
|
return_ACPI_STATUS(status);
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
|
|
|
|
2007-02-02 09:48:18 -07:00
|
|
|
#ifdef ACPI_OBSOLETE_FUNCTIONS
|
2005-04-16 16:20:36 -06:00
|
|
|
/*******************************************************************************
|
|
|
|
*
|
|
|
|
* FUNCTION: acpi_load_namespace
|
|
|
|
*
|
|
|
|
* PARAMETERS: None
|
|
|
|
*
|
|
|
|
* RETURN: Status
|
|
|
|
*
|
|
|
|
* DESCRIPTION: Load the name space from what ever is pointed to by DSDT.
|
|
|
|
* (DSDT points to either the BIOS or a buffer.)
|
|
|
|
*
|
|
|
|
******************************************************************************/
|
|
|
|
|
2005-08-04 22:44:28 -06:00
|
|
|
acpi_status acpi_ns_load_namespace(void)
|
2005-04-16 16:20:36 -06:00
|
|
|
{
|
2005-08-04 22:44:28 -06:00
|
|
|
acpi_status status;
|
2005-04-16 16:20:36 -06:00
|
|
|
|
ACPI: ACPICA 20060421
Removed a device initialization optimization introduced in
20051216 where the _STA method was not run unless an _INI
was also present for the same device. This optimization
could cause problems because it could allow _INI methods
to be run within a not-present device subtree (If a
not-present device had no _INI, _STA would not be run,
the not-present status would not be discovered, and the
children of the device would be incorrectly traversed.)
Implemented a new _STA optimization where namespace
subtrees that do not contain _INI are identified and
ignored during device initialization. Selectively running
_STA can significantly improve boot time on large machines
(with assistance from Len Brown.)
Implemented support for the device initialization case
where the returned _STA flags indicate a device not-present
but functioning. In this case, _INI is not run, but the
device children are examined for presence, as per the
ACPI specification.
Implemented an additional change to the IndexField support
in order to conform to MS behavior. The value written to
the Index Register is not simply a byte offset, it is a
byte offset in units of the access width of the parent
Index Field. (Fiodor Suietov)
Defined and deployed a new OSL interface,
acpi_os_validate_address(). This interface is called during
the creation of all AML operation regions, and allows
the host OS to exert control over what addresses it will
allow the AML code to access. Operation Regions whose
addresses are disallowed will cause a runtime exception
when they are actually accessed (will not affect or abort
table loading.)
Defined and deployed a new OSL interface,
acpi_os_validate_interface(). This interface allows the host OS
to match the various "optional" interface/behavior strings
for the _OSI predefined control method as appropriate
(with assistance from Bjorn Helgaas.)
Restructured and corrected various problems in the
exception handling code paths within DsCallControlMethod
and DsTerminateControlMethod in dsmethod (with assistance
from Takayoshi Kochi.)
Modified the Linux source converter to ignore quoted string
literals while converting identifiers from mixed to lower
case. This will correct problems with the disassembler
and other areas where such strings must not be modified.
The ACPI_FUNCTION_* macros no longer require quotes around
the function name. This allows the Linux source converter
to convert the names, now that the converter ignores
quoted strings.
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
2006-04-21 15:15:00 -06:00
|
|
|
ACPI_FUNCTION_TRACE(acpi_load_name_space);
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
/* There must be at least a DSDT installed */
|
|
|
|
|
|
|
|
if (acpi_gbl_DSDT == NULL) {
|
2006-01-27 14:43:00 -07:00
|
|
|
ACPI_ERROR((AE_INFO, "DSDT is not in memory"));
|
2005-08-04 22:44:28 -06:00
|
|
|
return_ACPI_STATUS(AE_NO_ACPI_TABLES);
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
2012-10-30 20:26:55 -06:00
|
|
|
* Load the namespace. The DSDT is required,
|
2005-04-16 16:20:36 -06:00
|
|
|
* but the SSDT and PSDT tables are optional.
|
|
|
|
*/
|
ACPI: ACPICA 20060421
Removed a device initialization optimization introduced in
20051216 where the _STA method was not run unless an _INI
was also present for the same device. This optimization
could cause problems because it could allow _INI methods
to be run within a not-present device subtree (If a
not-present device had no _INI, _STA would not be run,
the not-present status would not be discovered, and the
children of the device would be incorrectly traversed.)
Implemented a new _STA optimization where namespace
subtrees that do not contain _INI are identified and
ignored during device initialization. Selectively running
_STA can significantly improve boot time on large machines
(with assistance from Len Brown.)
Implemented support for the device initialization case
where the returned _STA flags indicate a device not-present
but functioning. In this case, _INI is not run, but the
device children are examined for presence, as per the
ACPI specification.
Implemented an additional change to the IndexField support
in order to conform to MS behavior. The value written to
the Index Register is not simply a byte offset, it is a
byte offset in units of the access width of the parent
Index Field. (Fiodor Suietov)
Defined and deployed a new OSL interface,
acpi_os_validate_address(). This interface is called during
the creation of all AML operation regions, and allows
the host OS to exert control over what addresses it will
allow the AML code to access. Operation Regions whose
addresses are disallowed will cause a runtime exception
when they are actually accessed (will not affect or abort
table loading.)
Defined and deployed a new OSL interface,
acpi_os_validate_interface(). This interface allows the host OS
to match the various "optional" interface/behavior strings
for the _OSI predefined control method as appropriate
(with assistance from Bjorn Helgaas.)
Restructured and corrected various problems in the
exception handling code paths within DsCallControlMethod
and DsTerminateControlMethod in dsmethod (with assistance
from Takayoshi Kochi.)
Modified the Linux source converter to ignore quoted string
literals while converting identifiers from mixed to lower
case. This will correct problems with the disassembler
and other areas where such strings must not be modified.
The ACPI_FUNCTION_* macros no longer require quotes around
the function name. This allows the Linux source converter
to convert the names, now that the converter ignores
quoted strings.
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
2006-04-21 15:15:00 -06:00
|
|
|
status = acpi_ns_load_table_by_type(ACPI_TABLE_ID_DSDT);
|
2005-08-04 22:44:28 -06:00
|
|
|
if (ACPI_FAILURE(status)) {
|
|
|
|
return_ACPI_STATUS(status);
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
/* Ignore exceptions from these */
|
|
|
|
|
ACPI: ACPICA 20060421
Removed a device initialization optimization introduced in
20051216 where the _STA method was not run unless an _INI
was also present for the same device. This optimization
could cause problems because it could allow _INI methods
to be run within a not-present device subtree (If a
not-present device had no _INI, _STA would not be run,
the not-present status would not be discovered, and the
children of the device would be incorrectly traversed.)
Implemented a new _STA optimization where namespace
subtrees that do not contain _INI are identified and
ignored during device initialization. Selectively running
_STA can significantly improve boot time on large machines
(with assistance from Len Brown.)
Implemented support for the device initialization case
where the returned _STA flags indicate a device not-present
but functioning. In this case, _INI is not run, but the
device children are examined for presence, as per the
ACPI specification.
Implemented an additional change to the IndexField support
in order to conform to MS behavior. The value written to
the Index Register is not simply a byte offset, it is a
byte offset in units of the access width of the parent
Index Field. (Fiodor Suietov)
Defined and deployed a new OSL interface,
acpi_os_validate_address(). This interface is called during
the creation of all AML operation regions, and allows
the host OS to exert control over what addresses it will
allow the AML code to access. Operation Regions whose
addresses are disallowed will cause a runtime exception
when they are actually accessed (will not affect or abort
table loading.)
Defined and deployed a new OSL interface,
acpi_os_validate_interface(). This interface allows the host OS
to match the various "optional" interface/behavior strings
for the _OSI predefined control method as appropriate
(with assistance from Bjorn Helgaas.)
Restructured and corrected various problems in the
exception handling code paths within DsCallControlMethod
and DsTerminateControlMethod in dsmethod (with assistance
from Takayoshi Kochi.)
Modified the Linux source converter to ignore quoted string
literals while converting identifiers from mixed to lower
case. This will correct problems with the disassembler
and other areas where such strings must not be modified.
The ACPI_FUNCTION_* macros no longer require quotes around
the function name. This allows the Linux source converter
to convert the names, now that the converter ignores
quoted strings.
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
2006-04-21 15:15:00 -06:00
|
|
|
(void)acpi_ns_load_table_by_type(ACPI_TABLE_ID_SSDT);
|
|
|
|
(void)acpi_ns_load_table_by_type(ACPI_TABLE_ID_PSDT);
|
2005-04-16 16:20:36 -06:00
|
|
|
|
2005-08-04 22:44:28 -06:00
|
|
|
ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT,
|
|
|
|
"ACPI Namespace successfully loaded at root %p\n",
|
|
|
|
acpi_gbl_root_node));
|
2005-04-16 16:20:36 -06:00
|
|
|
|
2005-08-04 22:44:28 -06:00
|
|
|
return_ACPI_STATUS(status);
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
2007-02-02 09:48:18 -07:00
|
|
|
#endif
|
2005-04-16 16:20:36 -06:00
|
|
|
|
2005-04-18 20:49:35 -06:00
|
|
|
#ifdef ACPI_FUTURE_IMPLEMENTATION
|
2005-04-16 16:20:36 -06:00
|
|
|
/*******************************************************************************
|
|
|
|
*
|
|
|
|
* FUNCTION: acpi_ns_delete_subtree
|
|
|
|
*
|
|
|
|
* PARAMETERS: start_handle - Handle in namespace where search begins
|
|
|
|
*
|
|
|
|
* RETURNS Status
|
|
|
|
*
|
|
|
|
* DESCRIPTION: Walks the namespace starting at the given handle and deletes
|
|
|
|
* all objects, entries, and scopes in the entire subtree.
|
|
|
|
*
|
|
|
|
* Namespace/Interpreter should be locked or the subsystem should
|
|
|
|
* be in shutdown before this routine is called.
|
|
|
|
*
|
|
|
|
******************************************************************************/
|
|
|
|
|
2005-08-04 22:44:28 -06:00
|
|
|
static acpi_status acpi_ns_delete_subtree(acpi_handle start_handle)
|
2005-04-16 16:20:36 -06:00
|
|
|
{
|
2005-08-04 22:44:28 -06:00
|
|
|
acpi_status status;
|
|
|
|
acpi_handle child_handle;
|
|
|
|
acpi_handle parent_handle;
|
|
|
|
acpi_handle next_child_handle;
|
|
|
|
acpi_handle dummy;
|
|
|
|
u32 level;
|
2005-04-16 16:20:36 -06:00
|
|
|
|
ACPI: ACPICA 20060421
Removed a device initialization optimization introduced in
20051216 where the _STA method was not run unless an _INI
was also present for the same device. This optimization
could cause problems because it could allow _INI methods
to be run within a not-present device subtree (If a
not-present device had no _INI, _STA would not be run,
the not-present status would not be discovered, and the
children of the device would be incorrectly traversed.)
Implemented a new _STA optimization where namespace
subtrees that do not contain _INI are identified and
ignored during device initialization. Selectively running
_STA can significantly improve boot time on large machines
(with assistance from Len Brown.)
Implemented support for the device initialization case
where the returned _STA flags indicate a device not-present
but functioning. In this case, _INI is not run, but the
device children are examined for presence, as per the
ACPI specification.
Implemented an additional change to the IndexField support
in order to conform to MS behavior. The value written to
the Index Register is not simply a byte offset, it is a
byte offset in units of the access width of the parent
Index Field. (Fiodor Suietov)
Defined and deployed a new OSL interface,
acpi_os_validate_address(). This interface is called during
the creation of all AML operation regions, and allows
the host OS to exert control over what addresses it will
allow the AML code to access. Operation Regions whose
addresses are disallowed will cause a runtime exception
when they are actually accessed (will not affect or abort
table loading.)
Defined and deployed a new OSL interface,
acpi_os_validate_interface(). This interface allows the host OS
to match the various "optional" interface/behavior strings
for the _OSI predefined control method as appropriate
(with assistance from Bjorn Helgaas.)
Restructured and corrected various problems in the
exception handling code paths within DsCallControlMethod
and DsTerminateControlMethod in dsmethod (with assistance
from Takayoshi Kochi.)
Modified the Linux source converter to ignore quoted string
literals while converting identifiers from mixed to lower
case. This will correct problems with the disassembler
and other areas where such strings must not be modified.
The ACPI_FUNCTION_* macros no longer require quotes around
the function name. This allows the Linux source converter
to convert the names, now that the converter ignores
quoted strings.
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
2006-04-21 15:15:00 -06:00
|
|
|
ACPI_FUNCTION_TRACE(ns_delete_subtree);
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
parent_handle = start_handle;
|
|
|
|
child_handle = NULL;
|
2005-08-04 22:44:28 -06:00
|
|
|
level = 1;
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
/*
|
|
|
|
* Traverse the tree of objects until we bubble back up
|
|
|
|
* to where we started.
|
|
|
|
*/
|
|
|
|
while (level > 0) {
|
2006-10-01 22:00:00 -06:00
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
/* Attempt to get the next object in this scope */
|
|
|
|
|
2005-08-04 22:44:28 -06:00
|
|
|
status = acpi_get_next_object(ACPI_TYPE_ANY, parent_handle,
|
|
|
|
child_handle, &next_child_handle);
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
child_handle = next_child_handle;
|
|
|
|
|
|
|
|
/* Did we get a new object? */
|
|
|
|
|
2005-08-04 22:44:28 -06:00
|
|
|
if (ACPI_SUCCESS(status)) {
|
2006-10-01 22:00:00 -06:00
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
/* Check if this object has any children */
|
|
|
|
|
2005-08-04 22:44:28 -06:00
|
|
|
if (ACPI_SUCCESS
|
|
|
|
(acpi_get_next_object
|
|
|
|
(ACPI_TYPE_ANY, child_handle, NULL, &dummy))) {
|
2005-04-16 16:20:36 -06:00
|
|
|
/*
|
|
|
|
* There is at least one child of this object,
|
|
|
|
* visit the object
|
|
|
|
*/
|
|
|
|
level++;
|
|
|
|
parent_handle = child_handle;
|
|
|
|
child_handle = NULL;
|
|
|
|
}
|
2005-08-04 22:44:28 -06:00
|
|
|
} else {
|
2005-04-16 16:20:36 -06:00
|
|
|
/*
|
|
|
|
* No more children in this object, go back up to
|
|
|
|
* the object's parent
|
|
|
|
*/
|
|
|
|
level--;
|
|
|
|
|
|
|
|
/* Delete all children now */
|
|
|
|
|
2005-08-04 22:44:28 -06:00
|
|
|
acpi_ns_delete_children(child_handle);
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
child_handle = parent_handle;
|
2005-08-04 22:44:28 -06:00
|
|
|
status = acpi_get_parent(parent_handle, &parent_handle);
|
|
|
|
if (ACPI_FAILURE(status)) {
|
|
|
|
return_ACPI_STATUS(status);
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Now delete the starting object, and we are done */
|
|
|
|
|
2009-06-28 23:43:27 -06:00
|
|
|
acpi_ns_remove_node(child_handle);
|
2005-08-04 22:44:28 -06:00
|
|
|
return_ACPI_STATUS(AE_OK);
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
/*******************************************************************************
|
|
|
|
*
|
|
|
|
* FUNCTION: acpi_ns_unload_name_space
|
|
|
|
*
|
2012-07-11 19:40:10 -06:00
|
|
|
* PARAMETERS: handle - Root of namespace subtree to be deleted
|
2005-04-16 16:20:36 -06:00
|
|
|
*
|
|
|
|
* RETURN: Status
|
|
|
|
*
|
|
|
|
* DESCRIPTION: Shrinks the namespace, typically in response to an undocking
|
2012-10-30 20:26:55 -06:00
|
|
|
* event. Deletes an entire subtree starting from (and
|
2005-04-16 16:20:36 -06:00
|
|
|
* including) the given handle.
|
|
|
|
*
|
|
|
|
******************************************************************************/
|
|
|
|
|
2005-08-04 22:44:28 -06:00
|
|
|
acpi_status acpi_ns_unload_namespace(acpi_handle handle)
|
2005-04-16 16:20:36 -06:00
|
|
|
{
|
2005-08-04 22:44:28 -06:00
|
|
|
acpi_status status;
|
2005-04-16 16:20:36 -06:00
|
|
|
|
ACPI: ACPICA 20060421
Removed a device initialization optimization introduced in
20051216 where the _STA method was not run unless an _INI
was also present for the same device. This optimization
could cause problems because it could allow _INI methods
to be run within a not-present device subtree (If a
not-present device had no _INI, _STA would not be run,
the not-present status would not be discovered, and the
children of the device would be incorrectly traversed.)
Implemented a new _STA optimization where namespace
subtrees that do not contain _INI are identified and
ignored during device initialization. Selectively running
_STA can significantly improve boot time on large machines
(with assistance from Len Brown.)
Implemented support for the device initialization case
where the returned _STA flags indicate a device not-present
but functioning. In this case, _INI is not run, but the
device children are examined for presence, as per the
ACPI specification.
Implemented an additional change to the IndexField support
in order to conform to MS behavior. The value written to
the Index Register is not simply a byte offset, it is a
byte offset in units of the access width of the parent
Index Field. (Fiodor Suietov)
Defined and deployed a new OSL interface,
acpi_os_validate_address(). This interface is called during
the creation of all AML operation regions, and allows
the host OS to exert control over what addresses it will
allow the AML code to access. Operation Regions whose
addresses are disallowed will cause a runtime exception
when they are actually accessed (will not affect or abort
table loading.)
Defined and deployed a new OSL interface,
acpi_os_validate_interface(). This interface allows the host OS
to match the various "optional" interface/behavior strings
for the _OSI predefined control method as appropriate
(with assistance from Bjorn Helgaas.)
Restructured and corrected various problems in the
exception handling code paths within DsCallControlMethod
and DsTerminateControlMethod in dsmethod (with assistance
from Takayoshi Kochi.)
Modified the Linux source converter to ignore quoted string
literals while converting identifiers from mixed to lower
case. This will correct problems with the disassembler
and other areas where such strings must not be modified.
The ACPI_FUNCTION_* macros no longer require quotes around
the function name. This allows the Linux source converter
to convert the names, now that the converter ignores
quoted strings.
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
2006-04-21 15:15:00 -06:00
|
|
|
ACPI_FUNCTION_TRACE(ns_unload_name_space);
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
/* Parameter validation */
|
|
|
|
|
|
|
|
if (!acpi_gbl_root_node) {
|
2005-08-04 22:44:28 -06:00
|
|
|
return_ACPI_STATUS(AE_NO_NAMESPACE);
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
if (!handle) {
|
2005-08-04 22:44:28 -06:00
|
|
|
return_ACPI_STATUS(AE_BAD_PARAMETER);
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
/* This function does the real work */
|
|
|
|
|
2005-08-04 22:44:28 -06:00
|
|
|
status = acpi_ns_delete_subtree(handle);
|
|
|
|
return_ACPI_STATUS(status);
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
2005-04-18 20:49:35 -06:00
|
|
|
#endif
|
2005-04-16 16:20:36 -06:00
|
|
|
#endif
|