x86: cpu_debug add write support for MSRs

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Supported write flag for registers.
currently write is enabled only for PMC MSR.

[root@ht]# cat /sys/kernel/debug/x86/cpu/cpu1/pmc/0x300/value
0x0

[root@ht]# echo 1234 > /sys/kernel/debug/x86/cpu/cpu1/pmc/0x300/value
[root@ht]# cat /sys/kernel/debug/x86/cpu/cpu1/pmc/0x300/value
0x4d2

[root@ht]# echo 0x1234 > /sys/kernel/debug/x86/cpu/cpu1/pmc/0x300/value
[root@ht]# cat /sys/kernel/debug/x86/cpu/cpu1/pmc/0x300/value
0x1234

Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

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This commit is contained in:

Jaswinder Singh Rajput 2009-03-12 02:37:00 +05:30 • committed by Ingo Molnar

parent 02dde8b45c

commit 91219bcbdc

2 changed files with 97 additions and 37 deletions

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16

arch/x86/include/asm/cpu_debug.h

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118

arch/x86/kernel/cpu/cpu_debug.c

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