forked from Minki/linux
a0d76247e0
This patch is a rework of the hwsampler oprofile implementation that has been applied recently. Now there are less non-architectural changes. The only changes are: * introduction of oprofile_add_ext_hw_sample(), and * removal of section attributes of oprofile_timer_init/_exit(). To setup hwsampler for oprofile we need to modify start()/stop() callbacks and additional hwsampler control files in oprofilefs. We do not reinitialize the timer or hwsampler mode by restarting calling init/exit() anymore, instead hwsampler_running is used to switch the mode directly in oprofile_hwsampler_start/_stop(). For locking reasons there is also hwsampler_file that reflects the value in oprofilefs. The overall diffstat of the oprofile s390 hwsampler implemenation shows the low impact to non-architectural code: arch/Kconfig | 3 + arch/s390/Kconfig | 1 + arch/s390/oprofile/Makefile | 2 +- arch/s390/oprofile/hwsampler.c | 1256 ++++++++++++++++++++++++++++++++++ arch/s390/oprofile/hwsampler.h | 113 +++ arch/s390/oprofile/hwsampler_files.c | 162 +++++ arch/s390/oprofile/init.c | 6 +- drivers/oprofile/cpu_buffer.c | 24 +- drivers/oprofile/timer_int.c | 4 +- include/linux/oprofile.h | 7 + 10 files changed, 1567 insertions(+), 11 deletions(-) Acked-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Robert Richter <robert.richter@amd.com>
31 lines
700 B
C
31 lines
700 B
C
/**
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* arch/s390/oprofile/init.c
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*
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* S390 Version
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* Copyright (C) 2003 IBM Deutschland Entwicklung GmbH, IBM Corporation
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* Author(s): Thomas Spatzier (tspat@de.ibm.com)
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*
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* @remark Copyright 2002 OProfile authors
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*/
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#include <linux/oprofile.h>
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#include <linux/init.h>
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#include <linux/errno.h>
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extern int oprofile_hwsampler_init(struct oprofile_operations* ops);
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extern void oprofile_hwsampler_exit(void);
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extern void s390_backtrace(struct pt_regs * const regs, unsigned int depth);
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int __init oprofile_arch_init(struct oprofile_operations* ops)
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{
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ops->backtrace = s390_backtrace;
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return oprofile_hwsampler_init(ops);
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}
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void oprofile_arch_exit(void)
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{
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oprofile_hwsampler_exit();
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}
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