diff options
| author | Zhonghui Fu <zhonghui.fu@linux.intel.com> | 2015-03-18 15:54:27 +0100 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2015-03-18 15:54:27 +0100 |
| commit | 431d452af13720463dda498999b2e9a08729c03a (patch) | |
| tree | 581e00b8b20d6fbc60df1d0d0c4390141abe1f4f /arch/x86/include/asm/pm-trace.h | |
| parent | 1d4a9c17d4d204a159139361e8d4db7f9f267879 (diff) | |
| download | linux-stable-431d452af13720463dda498999b2e9a08729c03a.tar.gz linux-stable-431d452af13720463dda498999b2e9a08729c03a.tar.bz2 linux-stable-431d452af13720463dda498999b2e9a08729c03a.zip | |
PM / sleep: add pm-trace support for suspending phase
Occasionally, the system can't come back up after suspend/resume
due to problems of device suspending phase. This patch make
PM_TRACE infrastructure cover device suspending phase of
suspend/resume process, and the information in RTC can tell
developers which device suspending function make system hang.
Signed-off-by: Zhonghui Fu <zhonghui.fu@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'arch/x86/include/asm/pm-trace.h')
| -rw-r--r-- | arch/x86/include/asm/pm-trace.h | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/arch/x86/include/asm/pm-trace.h b/arch/x86/include/asm/pm-trace.h new file mode 100644 index 000000000000..7b7ac42c3661 --- /dev/null +++ b/arch/x86/include/asm/pm-trace.h @@ -0,0 +1,23 @@ +#ifndef _ASM_X86_PM_TRACE_H +#define _ASM_X86_PM_TRACE_H + +#include <asm/asm.h> + +#define TRACE_RESUME(user) \ +do { \ + if (pm_trace_enabled) { \ + const void *tracedata; \ + asm volatile(_ASM_MOV " $1f,%0\n" \ + ".section .tracedata,\"a\"\n" \ + "1:\t.word %c1\n\t" \ + _ASM_PTR " %c2\n" \ + ".previous" \ + :"=r" (tracedata) \ + : "i" (__LINE__), "i" (__FILE__)); \ + generate_pm_trace(tracedata, user); \ + } \ +} while (0) + +#define TRACE_SUSPEND(user) TRACE_RESUME(user) + +#endif /* _ASM_X86_PM_TRACE_H */ |