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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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86c8c04792
Now that we've got a generic perf-events based oprofile backend we might as well make use of it seeing as SH doesn't do anything special with its oprofile backend. Also introduce a new CONFIG_HW_PERF_EVENTS symbol so that we can fallback to using the timer interrupt for oprofile if the CPU doesn't support perf events. Also, to avoid a section mismatch warning we need to annotate oprofile_arch_exit() with an __exit marker. Signed-off-by: Matt Fleming <matt@console-pimps.org> Acked-by: Paul Mundt <lethal@linux-sh.org> Signed-off-by: Robert Richter <robert.richter@amd.com>
62 lines
1.3 KiB
C
62 lines
1.3 KiB
C
/*
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* arch/sh/oprofile/init.c
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*
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* Copyright (C) 2003 - 2008 Paul Mundt
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*
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* Based on arch/mips/oprofile/common.c:
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*
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* Copyright (C) 2004, 2005 Ralf Baechle
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* Copyright (C) 2005 MIPS Technologies, Inc.
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*/
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#include <linux/kernel.h>
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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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#include <linux/smp.h>
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#include <linux/perf_event.h>
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#include <asm/processor.h>
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#ifdef CONFIG_HW_PERF_EVENTS
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extern void sh_backtrace(struct pt_regs * const regs, unsigned int depth);
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char *op_name_from_perf_id(void)
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{
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const char *pmu;
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char buf[20];
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int size;
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pmu = perf_pmu_name();
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if (!pmu)
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return NULL;
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size = snprintf(buf, sizeof(buf), "sh/%s", pmu);
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if (size > -1 && size < sizeof(buf))
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return buf;
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return NULL;
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}
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int __init oprofile_arch_init(struct oprofile_operations *ops)
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{
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ops->backtrace = sh_backtrace;
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return oprofile_perf_init(ops);
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}
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void __exit oprofile_arch_exit(void)
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{
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oprofile_perf_exit();
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}
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#else
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int __init oprofile_arch_init(struct oprofile_operations *ops)
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{
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pr_info("oprofile: hardware counters not available\n");
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return -ENODEV;
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}
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void __exit oprofile_arch_exit(void) {}
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#endif /* CONFIG_HW_PERF_EVENTS */
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