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yaml --- r: 112841 b: refs/heads/master c: 81faaae h: refs/heads/master i: 112839: 273a7e2 v: v3
git-mirror · Sep 10, 2008 · 0c5879f · 0c5879f
1 parent 35317aa
commit 0c5879f
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Showing 11 changed files with 1,302 additions and 529 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: f69feff720497237ae9dd2f4604921bd3080c421
+refs/heads/master: 81faaae45701484bd7368336e02f2a846153b22f
diff --git a/trunk/arch/x86/Kconfig.cpu b/trunk/arch/x86/Kconfig.cpu
@@ -477,3 +477,21 @@ config CPU_SUP_UMC_32
 	depends on !64BIT
 	help
 	  This enables extended support for UMC processors
+
+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.
+
+config X86_PTRACE_BTS
+	bool "ptrace interface to Branch Trace Store"
+	default y
+	depends on (X86_DS && 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.
diff --git a/trunk/arch/x86/kernel/cpu/intel.c b/trunk/arch/x86/kernel/cpu/intel.c
@@ -221,10 +221,11 @@ static void __cpuinit init_intel(struct cpuinfo_x86 *c)
 			set_cpu_cap(c, X86_FEATURE_BTS);
 		if (!(l1 & (1<<12)))
 			set_cpu_cap(c, X86_FEATURE_PEBS);
+		ds_init_intel(c);
 	}
 
 	if (cpu_has_bts)
-		ds_init_intel(c);
+		ptrace_bts_init_intel(c);
 
 	/*
 	 * See if we have a good local APIC by checking for buggy Pentia,