ACPI / debugger: Add IO interface to access debugger functionalities

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 <[email protected]> Signed-off-by: Rafael J. Wysocki <[email protected]>
josf · Dec 14, 2015 · 8cfb0cd · 8cfb0cd
1 parent 8a2a250
commit 8cfb0cd
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Showing 8 changed files with 887 additions and 17 deletions.
diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig
@@ -58,8 +58,9 @@ config ACPI_CCA_REQUIRED
 	bool
 
 config ACPI_DEBUGGER
-	bool "AML debugger interface (EXPERIMENTAL)"
+	bool "AML debugger interface"
 	select ACPI_DEBUG
+	depends on DEBUG_FS
 	help
 	  Enable in-kernel debugging of AML facilities: statistics, internal
 	  object dump, single step control method execution.

diff --git a/drivers/acpi/Makefile b/drivers/acpi/Makefile
@@ -50,6 +50,7 @@ acpi-y				+= sysfs.o
 acpi-y				+= property.o
 acpi-$(CONFIG_X86)		+= acpi_cmos_rtc.o
 acpi-$(CONFIG_DEBUG_FS)		+= debugfs.o
+acpi-$(CONFIG_ACPI_DEBUGGER)	+= acpi_dbg.o
 acpi-$(CONFIG_ACPI_NUMA)	+= numa.o
 acpi-$(CONFIG_ACPI_PROCFS_POWER) += cm_sbs.o
 acpi-y				+= acpi_lpat.o