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x86, bts: add selftest for BTS

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Perform a selftest of branch trace store when a cpu is initialized.

WARN and disable branch trace store support if the selftest fails.

Signed-off-by: Markus Metzger <markus.t.metzger@intel.com>
LKML-Reference: <20090313104507.A30125@sedona.ch.intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Markus Metzger
2009-03-13 10:45:07 +01:00
committed by Ingo Molnar
parent bc44fb5f7d
commit 8a327f6d1b
5 changed files with 287 additions and 0 deletions
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15
arch/x86/kernel/ds_selftest.h Normal file
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/*
* Debug Store support - selftest
*
*
* Copyright (C) 2009 Intel Corporation.
* Markus Metzger <markus.t.metzger@intel.com>, 2009
*/
#ifdef CONFIG_X86_DS_SELFTEST
extern int ds_selftest_bts(void);
extern int ds_selftest_pebs(void);
#else
static inline int ds_selftest_bts(void) { return 0; }
static inline int ds_selftest_pebs(void) { return 0; }
#endif /* CONFIG_X86_DS_SELFTEST */