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x86/oprofile: op_model_athlon.c: fix counter reset when reenabling IBS OP

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Signed-off-by: Robert Richter <robert.richter@amd.com>
Cc: oprofile-list <oprofile-list@lists.sourceforge.net>
Cc: Barry Kasindorf <barry.kasindorf@amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Robert Richter 2008-07-22 21:09:04 +02:00 committed by Ingo Molnar
parent 87f0baccc2
commit 543a157bbd
1 changed files with 1 additions and 0 deletions
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arch/x86/oprofile/op_model_athlon.c
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@ -251,6 +251,7 @@ op_amd_handle_ibs(struct pt_regs * const regs,
(unsigned int *)&ibs_op,
IBS_OP_BEGIN);
rdmsr(MSR_AMD64_IBSOPCTL, low, high);
high = 0;
low &= ~IBS_OP_LOW_VALID_BIT;
low |= IBS_OP_LOW_ENABLE;
wrmsr(MSR_AMD64_IBSOPCTL, low, high);