| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-ID: <54E00347.1070307@linux.intel.com>
Date: Sun, 15 Feb 2015 10:24:07 +0800
From: "Fu, Zhonghui" <zhonghui.fu@...ux.intel.com>
To: tglx@...utronix.de, mingo@...hat.com, hpa@...or.com, x86@...nel.org
CC: "Rafael J. Wysocki" <rjw@...ysocki.net>, pavel@....cz,
len.brown@...el.com,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
linux-pm@...r.kernel.org
Subject: [PATCH v2] PM-Trace: 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@...ux.intel.com>
---
Changes in v2:
- Add -M option so that the rename and changes can be reviewed much easier.
arch/x86/include/asm/pm-trace.h | 36 ++++++++++++++++++++++++++
arch/x86/include/asm/resume-trace.h | 21 ---------------
drivers/base/power/main.c | 20 +++++++++++---
drivers/base/power/trace.c | 6 ++--
include/linux/{resume-trace.h => pm-trace.h} | 9 +++---
kernel/power/main.c | 2 +-
6 files changed, 61 insertions(+), 33 deletions(-)
create mode 100644 arch/x86/include/asm/pm-trace.h
delete mode 100644 arch/x86/include/asm/resume-trace.h
rename include/linux/{resume-trace.h => pm-trace.h} (75%)
diff --git a/arch/x86/include/asm/pm-trace.h b/arch/x86/include/asm/pm-trace.h
new file mode 100644
index 0000000..09bd918
--- /dev/null
+++ b/arch/x86/include/asm/pm-trace.h
@@ -0,0 +1,36 @@
+#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) \
+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)
+
+#endif /* _ASM_X86_PM_TRACE_H */
diff --git a/arch/x86/include/asm/resume-trace.h b/arch/x86/include/asm/resume-trace.h
deleted file mode 100644
index 3ff1c2c..0000000
--- a/arch/x86/include/asm/resume-trace.h
+++ /dev/null
@@ -1,21 +0,0 @@
-#ifndef _ASM_X86_RESUME_TRACE_H
-#define _ASM_X86_RESUME_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_resume_trace(tracedata, user); \
- } \
-} while (0)
-
-#endif /* _ASM_X86_RESUME_TRACE_H */
diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c
index 9717d5f..3d874ec 100644
--- a/drivers/base/power/main.c
+++ b/drivers/base/power/main.c
@@ -23,7 +23,7 @@
#include <linux/mutex.h>
#include <linux/pm.h>
#include <linux/pm_runtime.h>
-#include <linux/resume-trace.h>
+#include <linux/pm-trace.h>
#include <linux/interrupt.h>
#include <linux/sched.h>
#include <linux/async.h>
@@ -1017,6 +1017,9 @@ static int __device_suspend_noirq(struct device *dev, pm_message_t state, bool a
char *info = NULL;
int error = 0;
+ TRACE_DEVICE(dev);
+ TRACE_SUSPEND(0);
+
if (async_error)
goto Complete;
@@ -1057,6 +1060,7 @@ static int __device_suspend_noirq(struct device *dev, pm_message_t state, bool a
Complete:
complete_all(&dev->power.completion);
+ TRACE_SUSPEND(error);
return error;
}
@@ -1078,7 +1082,7 @@ static int device_suspend_noirq(struct device *dev)
{
reinit_completion(&dev->power.completion);
- if (pm_async_enabled && dev->power.async_suspend) {
+ if (is_async(dev)) {
get_device(dev);
async_schedule(async_suspend_noirq, dev);
return 0;
@@ -1157,6 +1161,9 @@ static int __device_suspend_late(struct device *dev, pm_message_t state, bool as
char *info = NULL;
int error = 0;
+ TRACE_DEVICE(dev);
+ TRACE_SUSPEND(0);
+
__pm_runtime_disable(dev, false);
if (async_error)
@@ -1198,6 +1205,7 @@ static int __device_suspend_late(struct device *dev, pm_message_t state, bool as
async_error = error;
Complete:
+ TRACE_SUSPEND(error);
complete_all(&dev->power.completion);
return error;
}
@@ -1219,7 +1227,7 @@ static int device_suspend_late(struct device *dev)
{
reinit_completion(&dev->power.completion);
- if (pm_async_enabled && dev->power.async_suspend) {
+ if (is_async(dev)) {
get_device(dev);
async_schedule(async_suspend_late, dev);
return 0;
@@ -1338,6 +1346,9 @@ static int __device_suspend(struct device *dev, pm_message_t state, bool async)
int error = 0;
DECLARE_DPM_WATCHDOG_ON_STACK(wd);
+ TRACE_DEVICE(dev);
+ TRACE_SUSPEND(0);
+
dpm_wait_for_children(dev, async);
if (async_error)
@@ -1444,6 +1455,7 @@ static int __device_suspend(struct device *dev, pm_message_t state, bool async)
if (error)
async_error = error;
+ TRACE_SUSPEND(error);
return error;
}
@@ -1465,7 +1477,7 @@ static int device_suspend(struct device *dev)
{
reinit_completion(&dev->power.completion);
- if (pm_async_enabled && dev->power.async_suspend) {
+ if (is_async(dev)) {
get_device(dev);
async_schedule(async_suspend, dev);
return 0;
diff --git a/drivers/base/power/trace.c b/drivers/base/power/trace.c
index d94a1f5..a311cfa 100644
--- a/drivers/base/power/trace.c
+++ b/drivers/base/power/trace.c
@@ -7,7 +7,7 @@
* devices may be working.
*/
-#include <linux/resume-trace.h>
+#include <linux/pm-trace.h>
#include <linux/export.h>
#include <linux/rtc.h>
@@ -154,7 +154,7 @@ EXPORT_SYMBOL(set_trace_device);
* it's not any guarantee, but it's a high _likelihood_ that
* the match is valid).
*/
-void generate_resume_trace(const void *tracedata, unsigned int user)
+void generate_pm_trace(const void *tracedata, unsigned int user)
{
unsigned short lineno = *(unsigned short *)tracedata;
const char *file = *(const char **)(tracedata + 2);
@@ -164,7 +164,7 @@ void generate_resume_trace(const void *tracedata, unsigned int user)
file_hash_value = hash_string(lineno, file, FILEHASH);
set_magic_time(user_hash_value, file_hash_value, dev_hash_value);
}
-EXPORT_SYMBOL(generate_resume_trace);
+EXPORT_SYMBOL(generate_pm_trace);
extern char __tracedata_start, __tracedata_end;
static int show_file_hash(unsigned int value)
diff --git a/include/linux/resume-trace.h b/include/linux/pm-trace.h
similarity index 75%
rename from include/linux/resume-trace.h
rename to include/linux/pm-trace.h
index f31db23..ecbde7a 100644
--- a/include/linux/resume-trace.h
+++ b/include/linux/pm-trace.h
@@ -1,8 +1,8 @@
-#ifndef RESUME_TRACE_H
-#define RESUME_TRACE_H
+#ifndef PM_TRACE_H
+#define PM_TRACE_H
#ifdef CONFIG_PM_TRACE
-#include <asm/resume-trace.h>
+#include <asm/pm-trace.h>
#include <linux/types.h>
extern int pm_trace_enabled;
@@ -14,7 +14,7 @@ static inline int pm_trace_is_enabled(void)
struct device;
extern void set_trace_device(struct device *);
-extern void generate_resume_trace(const void *tracedata, unsigned int user);
+extern void generate_pm_trace(const void *tracedata, unsigned int user);
extern int show_trace_dev_match(char *buf, size_t size);
#define TRACE_DEVICE(dev) do { \
@@ -28,6 +28,7 @@ static inline int pm_trace_is_enabled(void) { return 0; }
#define TRACE_DEVICE(dev) do { } while (0)
#define TRACE_RESUME(dev) do { } while (0)
+#define TRACE_SUSPEND(dev) do { } while (0)
#endif
diff --git a/kernel/power/main.c b/kernel/power/main.c
index 9a59d04..86e8157 100644
--- a/kernel/power/main.c
+++ b/kernel/power/main.c
@@ -11,7 +11,7 @@
#include <linux/export.h>
#include <linux/kobject.h>
#include <linux/string.h>
-#include <linux/resume-trace.h>
+#include <linux/pm-trace.h>
#include <linux/workqueue.h>
#include <linux/debugfs.h>
#include <linux/seq_file.h>
-- 1.7.1
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists