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authorAlexander Shishkin <virtuoso@slind.org>2009-12-01 16:00:51 +0300
committerRussell King <rmk+kernel@arm.linux.org.uk>2009-12-02 13:25:22 +0300
commitc5d6c7708c3e58015b2e4e13e6cea02c8567a94e (patch)
tree2ea9eb6d16be3de06d1172ed83e6bfe2c1c7d376 /arch/arm/Kconfig.debug
parent29e553631b2a0d4eebd23db630572e1027a9967a (diff)
downloadlinux-c5d6c7708c3e58015b2e4e13e6cea02c8567a94e.tar.xz
ARM: 5841/1: a driver for on-chip ETM and ETB
This driver implements support for on-chip Embedded Tracing Macrocell and Embedded Trace Buffer. It allows to trigger tracing of kernel execution flow and exporting trace output to userspace via character device and a sysrq combo. Trace output can then be decoded by a fairly simple open source tool [1] which is already sufficient to get the idea of what the kernel is doing. [1]: http://github.com/virtuoso/etm2human Signed-off-by: Alexander Shishkin <virtuoso@slind.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/Kconfig.debug')
-rw-r--r--arch/arm/Kconfig.debug8
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug
index 1a6f70e52921..ff54c23d085e 100644
--- a/arch/arm/Kconfig.debug
+++ b/arch/arm/Kconfig.debug
@@ -83,6 +83,14 @@ config DEBUG_ICEDCC
It does include a timeout to ensure that the system does not
totally freeze when there is nothing connected to read.
+config OC_ETM
+ bool "On-chip ETM and ETB"
+ select ARM_AMBA
+ help
+ Enables the on-chip embedded trace macrocell and embedded trace
+ buffer driver that will allow you to collect traces of the
+ kernel code.
+
config DEBUG_DC21285_PORT
bool "Kernel low-level debugging messages via footbridge serial port"
depends on DEBUG_LL && FOOTBRIDGE