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| author | Zhang Rui <rui.zhang@intel.com> | 2010-07-15 04:46:17 +0200 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2010-08-15 05:02:14 +0200 |
| commit | c637e4861c7db8165d0f438db3829e7878c96059 (patch) | |
| tree | 7cb2621815f1861d0e333cced6bf993f1b38c4e0 | |
| parent | ACPI: introduce drivers/acpi/debugfs.c (diff) | |
| download | linux-c637e4861c7db8165d0f438db3829e7878c96059.tar.xz linux-c637e4861c7db8165d0f438db3829e7878c96059.zip | |
ACPI: introduce module parameter acpi.aml_debug_output
Introduce module parameter acpi.aml_debug_output.
With acpi.aml_debug_output set, we can get AML debug object output
(Store (AAA, Debug)), even with CONFIG_ACPI_DEBUG cleared.
Together with the runtime custom method mechanism,
we can debug AML code problems without rebuilding the kernel.
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
| -rw-r--r-- | Documentation/acpi/method-customizing.txt | 2 | ||||
| -rw-r--r-- | drivers/acpi/acpica/acglobal.h | 2 | ||||
| -rw-r--r-- | drivers/acpi/debugfs.c | 8 | ||||
| -rw-r--r-- | include/acpi/acpixf.h | 2 |
4 files changed, 12 insertions, 2 deletions
diff --git a/Documentation/acpi/method-customizing.txt b/Documentation/acpi/method-customizing.txt index e628cd23ca80..3e1d25aee3fb 100644 --- a/Documentation/acpi/method-customizing.txt +++ b/Documentation/acpi/method-customizing.txt @@ -19,6 +19,8 @@ Note: Only ACPI METHOD can be overridden, any other object types like "Device", "OperationRegion", are not recognized. Note: The same ACPI control method can be overridden for many times, and it's always the latest one that used by Linux/kernel. +Note: To get the ACPI debug object output (Store (AAAA, Debug)), + please run "echo 1 > /sys/module/acpi/parameters/aml_debug_output". 1. override an existing method a) get the ACPI table via ACPI sysfs I/F. e.g. to get the DSDT, diff --git a/drivers/acpi/acpica/acglobal.h b/drivers/acpi/acpica/acglobal.h index 899d68afc3c5..92122292ef1f 100644 --- a/drivers/acpi/acpica/acglobal.h +++ b/drivers/acpi/acpica/acglobal.h @@ -115,7 +115,7 @@ u8 ACPI_INIT_GLOBAL(acpi_gbl_use_default_register_widths, TRUE); /* * Optionally enable output from the AML Debug Object. */ -u8 ACPI_INIT_GLOBAL(acpi_gbl_enable_aml_debug_object, FALSE); +u32 ACPI_INIT_GLOBAL(acpi_gbl_enable_aml_debug_object, FALSE); /* * Optionally copy the entire DSDT to local memory (instead of simply diff --git a/drivers/acpi/debugfs.c b/drivers/acpi/debugfs.c index abfcf9f6e766..7de27d49c4b9 100644 --- a/drivers/acpi/debugfs.c +++ b/drivers/acpi/debugfs.c @@ -12,6 +12,14 @@ #define _COMPONENT ACPI_SYSTEM_COMPONENT ACPI_MODULE_NAME("debugfs"); + +/* /sys/modules/acpi/parameters/aml_debug_output */ + +module_param_named(aml_debug_output, acpi_gbl_enable_aml_debug_object, + bool, 0644); +MODULE_PARM_DESC(aml_debug_output, + "To enable/disable the ACPI Debug Object output."); + /* /sys/kernel/debug/acpi/custom_method */ static ssize_t cm_write(struct file *file, const char __user * user_buf, diff --git a/include/acpi/acpixf.h b/include/acpi/acpixf.h index 1371cc997393..a6ea2ac40b9c 100644 --- a/include/acpi/acpixf.h +++ b/include/acpi/acpixf.h @@ -67,7 +67,7 @@ extern u8 acpi_gbl_leave_wake_gpes_disabled; extern u8 acpi_gbl_use_default_register_widths; extern acpi_name acpi_gbl_trace_method_name; extern u32 acpi_gbl_trace_flags; -extern u8 acpi_gbl_enable_aml_debug_object; +extern u32 acpi_gbl_enable_aml_debug_object; extern u8 acpi_gbl_copy_dsdt_locally; extern u8 acpi_gbl_truncate_io_addresses; |