x86, bts: improve help text for BTS config
PATCH 1/1 x86, bts: improve help text for BTS config
Improve the help text of the X86_PTRACE_BTS config. Make X86_DS invisible and depend on X86_PTRACE_BTS.
---
arch/x86/Kconfig.cpu +12 -12
@@ -513,19 +513,19 @@ If unsure, say N. config X86_DS - bool "Debug Store support" - default y - help - Add support for Debug Store. - This allows the kernel to provide a memory buffer to the hardware - to store various profiling and tracing events. + def_bool X86_PTRACE_BTS + depends on X86_DEBUGCTLMSR config X86_PTRACE_BTS - bool "ptrace interface to Branch Trace Store" + bool "Branch Trace Store" default y - depends on (X86_DS && X86_DEBUGCTLMSR) + depends on X86_DEBUGCTLMSR help - Add a ptrace interface to allow collecting an execution trace - of the traced task. - This collects control flow changes in a (cyclic) buffer and allows - debuggers to fill in the gaps and show an execution trace of the debuggee. + This adds a ptrace interface to the hardware's branch trace store. + + Debuggers may use it to collect an execution trace of the debugged + application in order to answer the question 'how did I get here?'. + Debuggers may trace user mode as well as kernel mode. + + Say Y unless there is no application development on this machine + and you want to save a small amount of code size.
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Ingo Molnar
AppliedQuoted 4 lines · Markus Metzger
Improve the help text of the
X86_PTRACE_BTSconfig. MakeX86_DSinvisible and depend onX86_PTRACE_BTS.Signed-off-by Markus Metzger <[email protected]>
applied the patch below to tip/x86/urgent, thanks Markus! (only a small change, added the Reported-by: Roland Dreier line)
Ingo
-------------->
Quoted 1 line
From
e4254fd175d2ebaa7d72ce33245c41ca34370a7eMon Sep 17 00:00:00 2001
From: Markus Metzger <[email protected]>
Date: Fri, 17 Oct 2008 09:09:27 +0200
Subject: [PATCH] x86, bts: improve help text for BTS config
Improve the help text of the X86_PTRACE_BTS config. Make X86_DS invisible and depend on X86_PTRACE_BTS.
--- arch/x86/Kconfig.cpu | 24 ++++++++++++------------ 1 files changed, 12 insertions(+), 12 deletions(-)
arch/x86/Kconfig.cpu +12 -12
@@ -513,19 +513,19 @@ config CPU_SUP_UMC_32 If unsure, say N. config X86_DS - bool "Debug Store support" - default y - help - Add support for Debug Store. - This allows the kernel to provide a memory buffer to the hardware - to store various profiling and tracing events. + def_bool X86_PTRACE_BTS + depends on X86_DEBUGCTLMSR config X86_PTRACE_BTS - bool "ptrace interface to Branch Trace Store" + bool "Branch Trace Store" default y - depends on (X86_DS && X86_DEBUGCTLMSR) + depends on X86_DEBUGCTLMSR help - Add a ptrace interface to allow collecting an execution trace - of the traced task. - This collects control flow changes in a (cyclic) buffer and allows - debuggers to fill in the gaps and show an execution trace of the debuggee. + This adds a ptrace interface to the hardware's branch trace store. + + Debuggers may use it to collect an execution trace of the debugged + application in order to answer the question 'how did I get here?'. + Debuggers may trace user mode as well as kernel mode. + + Say Y unless there is no application development on this machine + and you want to save a small amount of code size.