[tip:tracing/core] x86, debugctlmsr: add _on_cpu variants to debugctlmsr functions

[tip-bot for Markus Metzger]

Commit-ID:  35bb7600c17762bb129588c1877d2717fe325289
Gitweb:     http://git.kernel.org/tip/35bb7600c17762bb129588c1877d2717fe325289
Author:     Markus Metzger <markus.t.metzger@xxxxxxxxx>
AuthorDate: Fri, 3 Apr 2009 16:43:39 +0200
Committer:  Ingo Molnar <mingo@xxxxxxx>
CommitDate: Tue, 7 Apr 2009 13:36:19 +0200

x86, debugctlmsr: add _on_cpu variants to debugctlmsr functions

Add functions to get and set the debugctlmsr on different cpus.

Signed-off-by: Markus Metzger <markus.t.metzger@xxxxxxxxx>
Cc: roland@xxxxxxxxxx
Cc: eranian@xxxxxxxxxxxxxx
Cc: oleg@xxxxxxxxxx
Cc: juan.villacis@xxxxxxxxx
Cc: ak@xxxxxxxxxxxxxxxxxx
LKML-Reference: <20090403144554.738772000@xxxxxxxxx>
Signed-off-by: Ingo Molnar <mingo@xxxxxxx>


---
 arch/x86/include/asm/processor.h |   27 +++++++++++++++++++++++++++
 1 files changed, 27 insertions(+), 0 deletions(-)

diff --git a/arch/x86/include/asm/processor.h b/arch/x86/include/asm/processor.h
index 2483807..1efeb49 100644
--- a/arch/x86/include/asm/processor.h
+++ b/arch/x86/include/asm/processor.h
@@ -785,6 +785,21 @@ static inline unsigned long get_debugctlmsr(void)
     return debugctlmsr;
 }
 
+static inline unsigned long get_debugctlmsr_on_cpu(int cpu)
+{
+	u64 debugctlmsr = 0;
+	u32 val1, val2;
+
+#ifndef CONFIG_X86_DEBUGCTLMSR
+	if (boot_cpu_data.x86 < 6)
+		return 0;
+#endif
+	rdmsr_on_cpu(cpu, MSR_IA32_DEBUGCTLMSR, &val1, &val2);
+	debugctlmsr = val1 | ((u64)val2 << 32);
+
+	return debugctlmsr;
+}
+
 static inline void update_debugctlmsr(unsigned long debugctlmsr)
 {
 #ifndef CONFIG_X86_DEBUGCTLMSR
@@ -794,6 +809,18 @@ static inline void update_debugctlmsr(unsigned long debugctlmsr)
 	wrmsrl(MSR_IA32_DEBUGCTLMSR, debugctlmsr);
 }
 
+static inline void update_debugctlmsr_on_cpu(int cpu,
+					     unsigned long debugctlmsr)
+{
+#ifndef CONFIG_X86_DEBUGCTLMSR
+	if (boot_cpu_data.x86 < 6)
+		return;
+#endif
+	wrmsr_on_cpu(cpu, MSR_IA32_DEBUGCTLMSR,
+		     (u32)((u64)debugctlmsr),
+		     (u32)((u64)debugctlmsr >> 32));
+}
+
 /*
  * from system description table in BIOS. Mostly for MCA use, but
  * others may find it useful:
--
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