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coresight: abort tracing for unhandled aborts

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Add trace event to abort tracing for unhandled aborts such as
data abort and prefetch abort. A common event 'trace_unhandled_abort'
is shared for all unhandled aborts.

Change-Id: I6da9b30c74be48252402188a6f9a7703d21d6276
Signed-off-by: Sarang Joshi <spjoshi@codeaurora.org>
This commit is contained in:
Sarang Joshi
2013-12-10 23:38:27 -08:00
parent 0ba1c160a5
commit 632d012687
3 changed files with 43 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files
arch/arm/mm/fault.c
+4
View File
@@ -675,6 +675,8 @@ do_DataAbort(unsigned long addr, unsigned int fsr, struct pt_regs *regs)
if (!inf->fn(addr, fsr & ~FSR_LNX_PF, regs))
return;
trace_unhandled_abort(regs, addr, fsr);
printk(KERN_ALERT "Unhandled fault: %s (0x%03x) at 0x%08lx\n",
inf->name, fsr, addr);
@@ -707,6 +709,8 @@ do_PrefetchAbort(unsigned long addr, unsigned int ifsr, struct pt_regs *regs)
if (!inf->fn(addr, ifsr | FSR_LNX_PF, regs))
return;
trace_unhandled_abort(regs, addr, ifsr);
printk(KERN_ALERT "Unhandled prefetch abort: %s (0x%03x) at 0x%08lx\n",
inf->name, ifsr, addr);
drivers/coresight/coresight-event.c
+17
View File
@@ -45,6 +45,17 @@ static void event_abort_undef_instr(void *ignore,
}
}
static void event_abort_unhandled_abort(void *ignore,
struct pt_regs *regs,
unsigned long addr,
unsigned int fsr)
{
if (user_mode(regs)) {
coresight_abort();
pr_debug("coresight_event: addr: %lu, fsr:%u", addr, fsr);
}
}
static int event_abort_register(void)
{
int ret;
@@ -55,9 +66,14 @@ static int event_abort_register(void)
ret = register_trace_undef_instr(event_abort_undef_instr, NULL);
if (ret)
goto err_undef_instr;
ret = register_trace_unhandled_abort(event_abort_unhandled_abort, NULL);
if (ret)
goto err_unhandled_abort;
return 0;
err_unhandled_abort:
unregister_trace_undef_instr(event_abort_undef_instr, NULL);
err_undef_instr:
unregister_trace_user_fault(event_abort_user_fault, NULL);
err_usr_fault:
@@ -68,6 +84,7 @@ static void event_abort_unregister(void)
{
unregister_trace_user_fault(event_abort_user_fault, NULL);
unregister_trace_undef_instr(event_abort_undef_instr, NULL);
unregister_trace_unhandled_abort(event_abort_unhandled_abort, NULL);
}
static int event_abort_set(const char *val, struct kernel_param *kp)
include/trace/events/exception.h
+22 -1
View File
@@ -1,4 +1,4 @@
/* Copyright (c) 2012, The Linux Foundation. All rights reserved.
/* Copyright (c) 2012-2013, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
@@ -63,6 +63,27 @@ TRACE_EVENT(undef_instr,
TP_printk("pc:%p", __entry->prog_cnt)
);
TRACE_EVENT(unhandled_abort,
TP_PROTO(struct pt_regs *regs, unsigned long addr, unsigned int fsr),
TP_ARGS(regs, addr, fsr),
TP_STRUCT__entry(
__field(struct pt_regs *, regs)
__field(unsigned long, addr)
__field(unsigned int, fsr)
),
TP_fast_assign(
__entry->regs = regs;
__entry->addr = addr;
__entry->fsr = fsr;
),
TP_printk("addr:%lu, fsr:%u", __entry->addr, __entry->fsr)
);
#endif
#include <trace/define_trace.h>