The patch titled
Add PM_TRACE x86_64 support
has been added to the -mm tree. Its filename is
add-pm_trace-x86_64-support.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: Add PM_TRACE x86_64 support
From: Nigel Cunningham <nigel@xxxxxxxxxxxxxxxxxx>
Add x86_64 support for PM_TRACE, and shift per-arch code to the appropriate
subdirectories.
Symbol exports are added so tracing can be used from drivers built as
modules too.
Signed-off-by: Nigel Cunningham <nigel@xxxxxxxxxxxxxxxxxx>
Cc: Andi Kleen <ak@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/x86_64/kernel/vmlinux.lds.S | 7 +++++++
drivers/base/power/trace.c | 5 ++++-
include/asm-i386/resume-trace.h | 21 +++++++++++++++++++++
include/asm-x86_64/resume-trace.h | 21 +++++++++++++++++++++
include/linux/resume-trace.h | 24 ++++++------------------
kernel/power/Kconfig | 2 +-
6 files changed, 60 insertions(+), 20 deletions(-)
diff -puN arch/x86_64/kernel/vmlinux.lds.S~add-pm_trace-x86_64-support arch/x86_64/kernel/vmlinux.lds.S
--- a/arch/x86_64/kernel/vmlinux.lds.S~add-pm_trace-x86_64-support
+++ a/arch/x86_64/kernel/vmlinux.lds.S
@@ -54,6 +54,13 @@ SECTIONS
BUG_TABLE
+ . = ALIGN(4);
+ .tracedata : AT(ADDR(.tracedata) - LOAD_OFFSET) {
+ __tracedata_start = .;
+ *(.tracedata)
+ __tracedata_end = .;
+ }
+
. = ALIGN(PAGE_SIZE); /* Align data segment to page size boundary */
/* Data */
.data : AT(ADDR(.data) - LOAD_OFFSET) {
diff -puN drivers/base/power/trace.c~add-pm_trace-x86_64-support drivers/base/power/trace.c
--- a/drivers/base/power/trace.c~add-pm_trace-x86_64-support
+++ a/drivers/base/power/trace.c
@@ -142,6 +142,7 @@ void set_trace_device(struct device *dev
{
dev_hash_value = hash_string(DEVSEED, dev->bus_id, DEVHASH);
}
+EXPORT_SYMBOL(set_trace_device);
/*
* We could just take the "tracedata" index into the .tracedata
@@ -162,6 +163,7 @@ void generate_resume_trace(void *traceda
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);
extern char __tracedata_start, __tracedata_end;
static int show_file_hash(unsigned int value)
@@ -170,7 +172,8 @@ static int show_file_hash(unsigned int v
char *tracedata;
match = 0;
- for (tracedata = &__tracedata_start ; tracedata < &__tracedata_end ; tracedata += 6) {
+ for (tracedata = &__tracedata_start ; tracedata < &__tracedata_end ;
+ tracedata += 2 + sizeof(unsigned long)) {
unsigned short lineno = *(unsigned short *)tracedata;
const char *file = *(const char **)(tracedata + 2);
unsigned int hash = hash_string(lineno, file, FILEHASH);
diff -puN /dev/null include/asm-i386/resume-trace.h
--- /dev/null
+++ a/include/asm-i386/resume-trace.h
@@ -0,0 +1,21 @@
+#ifndef ARCH_RESUME_TRACE_H
+#define ARCH_RESUME_TRACE_H
+
+#ifdef CONFIG_PM_TRACE
+#define TRACE_RESUME(user) do { \
+ if (pm_trace_enabled) { \
+ void *tracedata; \
+ asm volatile("movl $1f,%0\n" \
+ ".section .tracedata,\"a\"\n" \
+ "1:\t.word %c1\n" \
+ "\t.long %c2\n" \
+ ".previous" \
+ :"=r" (tracedata) \
+ : "i" (__LINE__), "i" (__FILE__)); \
+ generate_resume_trace(tracedata, user); \
+ } \
+} while (0)
+#else
+#define TRACE_RESUME(user) do { } while (0)
+#endif
+#endif
diff -puN /dev/null include/asm-x86_64/resume-trace.h
--- /dev/null
+++ a/include/asm-x86_64/resume-trace.h
@@ -0,0 +1,21 @@
+#ifndef ARCH_RESUME_TRACE_H
+#define ARCH_RESUME_TRACE_H
+
+#ifdef CONFIG_PM_TRACE
+#define TRACE_RESUME(user) do { \
+ if (pm_trace_enabled) { \
+ void *tracedata; \
+ asm volatile("movq $1f,%0\n" \
+ ".section .tracedata,\"a\"\n" \
+ "1:\t.word %c1\n" \
+ "\t.quad %c2\n" \
+ ".previous" \
+ :"=r" (tracedata) \
+ : "i" (__LINE__), "i" (__FILE__)); \
+ generate_resume_trace(tracedata, user); \
+ } \
+} while (0)
+#else
+#define TRACE_RESUME(user) do { } while (0)
+#endif
+#endif
diff -puN include/linux/resume-trace.h~add-pm_trace-x86_64-support include/linux/resume-trace.h
--- a/include/linux/resume-trace.h~add-pm_trace-x86_64-support
+++ a/include/linux/resume-trace.h
@@ -1,6 +1,8 @@
#ifndef RESUME_TRACE_H
#define RESUME_TRACE_H
+#include <asm/resume-trace.h>
+
#ifdef CONFIG_PM_TRACE
extern int pm_trace_enabled;
@@ -9,26 +11,12 @@ struct device;
extern void set_trace_device(struct device *);
extern void generate_resume_trace(void *tracedata, unsigned int user);
-#define TRACE_DEVICE(dev) set_trace_device(dev)
-#define TRACE_RESUME(user) do { \
- if (pm_trace_enabled) { \
- void *tracedata; \
- asm volatile("movl $1f,%0\n" \
- ".section .tracedata,\"a\"\n" \
- "1:\t.word %c1\n" \
- "\t.long %c2\n" \
- ".previous" \
- :"=r" (tracedata) \
- : "i" (__LINE__), "i" (__FILE__)); \
- generate_resume_trace(tracedata, user); \
- } \
-} while (0)
-
+#define TRACE_DEVICE(dev) do { \
+ if (pm_trace_enabled) \
+ set_trace_device(dev); \
+ } while(0)
#else
-
#define TRACE_DEVICE(dev) do { } while (0)
-#define TRACE_RESUME(dev) do { } while (0)
-
#endif
#endif
diff -puN kernel/power/Kconfig~add-pm_trace-x86_64-support kernel/power/Kconfig
--- a/kernel/power/Kconfig~add-pm_trace-x86_64-support
+++ a/kernel/power/Kconfig
@@ -50,7 +50,7 @@ config DISABLE_CONSOLE_SUSPEND
config PM_TRACE
bool "Suspend/resume event tracing"
- depends on PM && PM_DEBUG && X86_32 && EXPERIMENTAL
+ depends on PM && PM_DEBUG && X86 && EXPERIMENTAL
default n
---help---
This enables some cheesy code to save the last PM event point in the
_
Patches currently in -mm which might be from nigel@xxxxxxxxxxxxxxxxxx are
add-pm_trace-x86_64-support.patch
-
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