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| author | Alexander Shishkin <virtuoso@slind.org> | 2009-12-01 14:00:51 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2009-12-02 10:25:22 +0000 |
| commit | c5d6c7708c3e58015b2e4e13e6cea02c8567a94e (patch) | |
| tree | 2ea9eb6d16be3de06d1172ed83e6bfe2c1c7d376 /arch/arm/Kconfig.debug | |
| parent | 29e553631b2a0d4eebd23db630572e1027a9967a (diff) | |
| download | lwn-c5d6c7708c3e58015b2e4e13e6cea02c8567a94e.tar.gz lwn-c5d6c7708c3e58015b2e4e13e6cea02c8567a94e.zip | |
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.debug | 8 |
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 |