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authorMarkus Metzger <markus.t.metzger@intel.com>2008-11-25 09:24:15 +0100
committerIngo Molnar <mingo@elte.hu>2008-11-25 17:31:13 +0100
commit1e9b51c28312f7334394aa30be56ff52c2b65b7e (patch)
treec0a231d83541263ee938e3452475409323e4e9a9 /arch/x86/Kconfig.cpu
parent8bba1bf5e2434c83f2fe8b1422604ace9bbe4cb8 (diff)
x86, bts, ftrace: a BTS ftrace plug-in prototype
Impact: add new ftrace plugin A prototype for a BTS ftrace plug-in. The tracer collects branch trace in a cyclic buffer for each cpu. The tracer is not configurable and the trace for each snapshot is appended when doing cat /debug/tracing/trace. This is a proof of concept that will be extended with future patches to become a (hopefully) useful tool. Signed-off-by: Markus Metzger <markus.t.metzger@intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/Kconfig.cpu')
-rw-r--r--arch/x86/Kconfig.cpu1
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/x86/Kconfig.cpu b/arch/x86/Kconfig.cpu
index b815664fe37..85a78575956 100644
--- a/arch/x86/Kconfig.cpu
+++ b/arch/x86/Kconfig.cpu
@@ -515,6 +515,7 @@ config CPU_SUP_UMC_32
config X86_DS
def_bool X86_PTRACE_BTS
depends on X86_DEBUGCTLMSR
+ select HAVE_HW_BRANCH_TRACER
config X86_PTRACE_BTS
bool "Branch Trace Store"