diff options
| author | Mike Travis <travis@sgi.com> | 2013-09-23 16:25:06 -0500 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2013-09-24 09:02:04 +0200 |
| commit | 8eba18428ac926f436064ac281e76d36d51bd631 (patch) | |
| tree | eeb83ea68df9eba9c4c2b3df14691846e3c012f1 /arch/x86/platform/uv/uv_nmi.c | |
| parent | 12ba6c990fab50fe568f3ad8715e81e356552428 (diff) | |
x86/UV: Add uvtrace support
This patch adds support for the uvtrace module by providing a
skeleton call to the registered trace function. It also
provides another separate 'NMI' tracer that is triggered by the
system wide 'power nmi' command.
Signed-off-by: Mike Travis <travis@sgi.com>
Reviewed-by: Dimitri Sivanich <sivanich@sgi.com>
Reviewed-by: Hedi Berriche <hedi@sgi.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Cc: Jason Wessel <jason.wessel@windriver.com>
Link: http://lkml.kernel.org/r/20130923212501.185052551@asylum.americas.sgi.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/platform/uv/uv_nmi.c')
| -rw-r--r-- | arch/x86/platform/uv/uv_nmi.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/arch/x86/platform/uv/uv_nmi.c b/arch/x86/platform/uv/uv_nmi.c index 2579fbd6b95c..c171ca533156 100644 --- a/arch/x86/platform/uv/uv_nmi.c +++ b/arch/x86/platform/uv/uv_nmi.c @@ -1,5 +1,5 @@ /* - * SGI NMI support routines + * SGI NMI/TRACE support routines * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by @@ -36,6 +36,13 @@ #include <asm/uv/uv_hub.h> #include <asm/uv/uv_mmrs.h> +void (*uv_trace_func)(const char *f, const int l, const char *fmt, ...); +EXPORT_SYMBOL(uv_trace_func); + +void (*uv_trace_nmi_func)(unsigned int reason, struct pt_regs *regs); +EXPORT_SYMBOL(uv_trace_nmi_func); + + /* * UV handler for NMI * @@ -551,6 +558,10 @@ int uv_handle_nmi(unsigned int reason, struct pt_regs *regs) return NMI_DONE; } + /* Call possible NMI trace function */ + if (unlikely(uv_trace_nmi_func)) + (uv_trace_nmi_func)(reason, regs); + /* Indicate we are the first CPU into the NMI handler */ master = (atomic_read(&uv_nmi_cpu) == cpu); |