linux/include/acpi/platform, branch v4.5

ACPICA: Additional 2016 copyright changes

2016-01-15T21:18:09Z

All tool/utility signons. Dual-license module header. Signed-off-by: Bob Moore Signed-off-by: Lv Zheng Signed-off-by: Rafael J. Wysocki

ACPICA: Linuxize: reduce divergences for 20151218 release

2016-01-01T02:26:44Z

The patch reduces source code differences between the Linux kernel and the ACPICA upstream so that the linuxized ACPICA 20151218 release can be applied with reduced human intervention. The pscode.c has already been out of sync for months, and it becomes more and more difficult to merge pscode.c changes, so instead of update the affected lines of pscode.c, this patch synchronizes entire pscode.c file. Signed-off-by: Lv Zheng Signed-off-by: Rafael J. Wysocki

ACPI / debugger: Add IO interface to access debugger functionalities

2015-12-14T23:17:44Z

This patch adds /sys/kernel/debug/acpi/acpidbg, which can be used by userspace programs to access ACPICA debugger functionalities. Known issue: 1. IO flush support acpi_os_notify_command_complete() and acpi_os_wait_command_ready() can be used by acpi_dbg module to implement .flush() filesystem operation. While this patch doesn't go that far. It then becomes userspace tool's duty now to flush old commands before executing new batch mode commands. Signed-off-by: Lv Zheng Signed-off-by: Rafael J. Wysocki

ACPICA: Debugger: Convert some mechanisms to OSPM specific

2015-12-14T23:17:43Z

The following mechanisms are OSPM specific: 1. Redirect output destination to console: no file redirection will be needed by an in-kernel debugger, there is even no file can be accessed when the debugger is running in the kernel mode. 2. Output command prompts: programs other than acpiexec can have different prompt characters and the prompt characters may be implemented as a special character sequence to form a char device IO protocol. 3. Command ready/complete handshake: OSPM debugger may wait more conditions to implement OSPM specific semantics (for example, FIFO full/empty conditions for O_NONBLOCK or IO open/close conditions). Leaving such OSPM specific stuffs in the ACPICA debugger core blocks Linux debugger IO driver implementation. Several new OSL APIs are provided by this patch: 1. acpi_os_initialize_command_signals: initialize command handshake mechanism or any other OSPM specific stuffs. 2. acpi_os_terminate_command_signals: reversal of acpi_os_initialize_command_signals. 3. acpi_os_wait_command_ready: putting debugger task into wait state when a command is not ready. OSPMs can terminate command loop by returning AE_CTRL_TERMINATE from this API. Normally, wait_event() or wait_for_multiple_object() may be used to implement this API. 4. acpi_os_notify_command_complete: putting user task into running state when a command has been completed. OSPMs can terminate command loop by returning AE_CTRL_TERMINATE from this API. Normally, wake_up() or set_event() may be used to implement this API. This patch also converts current command signaling implementation into a generic debugger layer (osgendbg.c) to be used by the existing OSPMs or acpiexec, in return, Linux can have chance to implement its own command handshake mechanism. This patch also implements acpiexec batch mode in a multi-threading mode comaptible style as a demo (this can be confirmed by configuring acpiexec into DEBUGGER_MULTI_THREADED mode where the batch mode is still working). Lv Zheng. Note that the OSPM specific command handshake mechanism is required by Linux kernel because: 1. Linux kernel trends to use wait queue to synchronize two threads, using mutexes to achieve that will cause false "dead lock" warnings. 2. The command handshake mechanism implemented by ACPICA is implemented in this way because of a design issue in debugger IO streaming. Debugger IO outputs are simply cached using a giant buffer, this should be tuned by Linux in the future. Signed-off-by: Lv Zheng Signed-off-by: Rafael J. Wysocki

ACPI: Enable build of AML interpreter debugger

2015-10-22T00:05:05Z

This patch enables ACPICA debugger files using a configurable CONFIG_ACPI_DEBUGGER configuration item. Those debugger related code that was originally masked as ACPI_FUTURE_USAGE now gets unmasked. Necessary OSL stubs are also added in this patch: 1. acpi_os_readable(): This should be arch specific in Linux, while this patch doesn't introduce real implementation and a complex mechanism to allow architecture specific acpi_os_readable() to be implemented to validate the address. It may be done by future commits. 2. acpi_os_get_line(): This is used to obtain debugger command input. This patch only introduces a simple KDB concept example in it and the example should be co-working with the code implemented in acpi_os_printf(). Since this KDB example won't be compiled unless ENABLE_DEBUGGER is defined and it seems Linux has already stopped to use ENABLE_DEBUGGER, thus do not expect it can work properly. This patch also cleans up all other ACPI_FUTURE_USAGE surroundings accordingly. 1. Since linkage error can be automatically detected, declaration in the headers needn't be surrounded by ACPI_FUTURE_USAGE. So only the following separate exported fuction bodies are masked by this macro (other exported fucntions may have already been masked at entire module level via drivers/acpi/acpica/Makefile): acpi_install_exception_handler() acpi_subsystem_status() acpi_get_system_info() acpi_get_statistics() acpi_install_initialization_handler() 2. Since strip can automatically zap the no-user functions, functions that are not marked with ACPI_EXPORT_SYMBOL() needn't get surrounded by ACPI_FUTURE_USAGE. So the following function which is not used by Linux kernel now won't get surrounded by this macro: acpi_ps_get_name() Signed-off-by: Lv Zheng Signed-off-by: Rafael J. Wysocki

ACPICA: Debugger: Update mutexes used for multithreaded debugger

2015-10-22T00:01:12Z

ACPICA commit 6b2701f619040e803313363f516b200e362a9100 Make these mutex objects independent of the deadlock detection mechanism. This mechanism caused failures with the multithread debugger. This patch doesn't affect Linux kernel as debugger is currently not fully functioning in the Linux kernel. And the further debugger cleanups will take care of handling debugger command signalling correctly instead of using such kind of mutexes. So it is safe to leave this patch as it is. Link: https://github.com/acpica/acpica/commit/6b2701f6 Signed-off-by: Bob Moore Signed-off-by: Lv Zheng Signed-off-by: Rafael J. Wysocki

ACPICA: Remove unnecessary conditional compilation

2015-10-22T00:01:11Z

ACPICA commit eea1f0e561893b6d6417913b2d224082fe3a0a5e Remove use of ACPI_DEBUGGER and ACPI_DISASSEMBLER where these defines are used around entire modules. Note: This type of code also causes problems with IDEs. Link: https://github.com/acpica/acpica/commit/eea1f0e5 Signed-off-by: Bob Moore Signed-off-by: Lv Zheng Signed-off-by: Rafael J. Wysocki

ACPICA: Header support to improve compatibility with MSVC

2015-08-25T21:11:32Z

ACPICA commit 5b4087fba991d8383046b550bbe22f3d8d9b9c8f Needed to improve MSVC editor support for symbols. For Linux kernel, this change is a no-op. Link: https://github.com/acpica/acpica/commit/5b4087fb Signed-off-by: Bob Moore Signed-off-by: Lv Zheng Signed-off-by: Rafael J. Wysocki

ACPICA: Headers: Fix some comments, no functional change

2015-08-25T21:11:31Z

ACPICA commit 539f8c03fe64305725bd85343e42f3b6c42aad14 A couple typos and long lines. Link: https://github.com/acpica/acpica/commit/539f8c03 Signed-off-by: Bob Moore Signed-off-by: Lv Zheng Signed-off-by: Rafael J. Wysocki

ACPICA: MSVC: Fix inclusion order issue of

2015-07-23T21:09:08Z

ACPICA commit 49c6a6517a906900e9baa51ad5859beeb8a3089f The following error logs can be seen for calloc/free/malloc/realloc that defined in the stdlib.h: ...\stdlib.h(281) : error C2059: syntax error : ',' ...\stdlib.h(281) : error C2143: syntax error : missing ')' before 'constant' ...\stdlib.h(281) : error C2143: syntax error : missing '{' before 'constant' ...\stdlib.h(281) : error C2059: syntax error : '' ...\stdlib.h(281) : error C2059: syntax error : ')' This is caused by the wrong inclusion order of stdlib.h/crtdbg.h introduced in acenv.h. This patch fixes this breakage. Lv Zheng. This patch doesn't affect Linux kernel. Link: https://github.com/acpica/acpica/commit/49c6a651 Signed-off-by: Lv Zheng Signed-off-by: Bob Moore Signed-off-by: Rafael J. Wysocki