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Subject[tip:tracing/core] x86, debugctlmsr: add _on_cpu variants to debugctlmsr functions
Commit-ID:  35bb7600c17762bb129588c1877d2717fe325289
Gitweb: http://git.kernel.org/tip/35bb7600c17762bb129588c1877d2717fe325289
Author: Markus Metzger <markus.t.metzger@intel.com>
AuthorDate: Fri, 3 Apr 2009 16:43:39 +0200
Committer: Ingo Molnar <mingo@elte.hu>
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@intel.com>
Cc: roland@redhat.com
Cc: eranian@googlemail.com
Cc: oleg@redhat.com
Cc: juan.villacis@intel.com
Cc: ak@linux.jf.intel.com
LKML-Reference: <20090403144554.738772000@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>


---
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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