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authordann <dann@xtensa-linux.org>2008-05-21 17:43:50 -0700
committerChris Zankel <chris@zankel.net>2013-02-23 19:22:54 -0800
commite6ffe17ec45dd763ee8278246a112562f64a4ef2 (patch)
tree3efe66a318764e0aeab4385eb407ec597f1f9f9b /arch/xtensa/Kconfig
parent2d6f82fee45a52359012948306587eba704cf35b (diff)
downloadvexpress-lsk-e6ffe17ec45dd763ee8278246a112562f64a4ef2.tar.gz
xtensa: add support for oprofile
Support call graph profiling. Keep upper two bits of PC unchanged through backtrace rather than take them from sp (a1). The stack pointer is usually in the same GB (same upper 2 bits) as PC, but technically doesn't always have to be (and might not in the future, when taking full advantage of MMU v3). Signed-off-by: Dan Nicolaescu <dann@xtensa-linux.org> Signed-off-by: Pete Delaney <piet@tensilica.com> Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Chris Zankel <chris@zankel.net>
Diffstat (limited to 'arch/xtensa/Kconfig')
-rw-r--r--arch/xtensa/Kconfig1
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/xtensa/Kconfig b/arch/xtensa/Kconfig
index f83780f8f29..f61f7362c8f 100644
--- a/arch/xtensa/Kconfig
+++ b/arch/xtensa/Kconfig
@@ -17,6 +17,7 @@ config XTENSA
select ARCH_WANT_OPTIONAL_GPIOLIB
select CLONE_BACKWARDS
select IRQ_DOMAIN
+ select HAVE_OPROFILE
help
Xtensa processors are 32-bit RISC machines designed by Tensilica
primarily for embedded systems. These processors are both