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Commit 35bb7600 authored by Markus Metzger's avatar Markus Metzger Committed by Ingo Molnar
Browse files

x86, debugctlmsr: add _on_cpu variants to debugctlmsr functions 



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

Signed-off-by: default avatarMarkus 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: default avatarIngo Molnar <mingo@elte.hu>
parent 15879d04

arch/x86/include/asm/processor.h

+27 −0
Original line number Diff line number Diff line
@@ -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: