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Message-Id: <1170900487.4451.62.camel@nigel.suspend2.net>
Date: Thu, 08 Feb 2007 13:08:06 +1100
From: Nigel Cunningham <nigel@...el.suspend2.net>
To: Otavio Salvador <otavio@...ian.org>
Cc: LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] Add PM_TRACE x86_64 support.
On Wed, 2007-02-07 at 23:18 -0200, Otavio Salvador wrote:
> Nigel Cunningham <nigel@...el.suspend2.net> writes:
>
> > - for (tracedata = &__tracedata_start ; tracedata < &__tracedata_end ; tracedata += 6) {
> > + for (tracedata = &__tracedata_start ; tracedata < &__tracedata_end ; tracedata += 2 + sizeof(unsigned long)) {
>
> Could you split this line?
Sure.
-- New version -- (What's the right way to do this?)
This patch add x86_64 support for PM_TRACE, and shifts per-arch code to
the appropriate subdirectories.
Symbol exports are added so tracing can be used from drivers built as
modules too.
Please apply.
Signed-off-by: Nigel Cunningham <nigel@...el.suspend2.net>
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 -ruNp 160-PM_TRACE.patch-old/arch/x86_64/kernel/vmlinux.lds.S 160-PM_TRACE.patch-new/arch/x86_64/kernel/vmlinux.lds.S
--- 160-PM_TRACE.patch-old/arch/x86_64/kernel/vmlinux.lds.S 2007-02-08 13:05:09.000000000 +1100
+++ 160-PM_TRACE.patch-new/arch/x86_64/kernel/vmlinux.lds.S 2007-02-07 23:32:23.000000000 +1100
@@ -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 -ruNp 160-PM_TRACE.patch-old/drivers/base/power/trace.c 160-PM_TRACE.patch-new/drivers/base/power/trace.c
--- 160-PM_TRACE.patch-old/drivers/base/power/trace.c 2007-02-06 14:48:31.000000000 +1100
+++ 160-PM_TRACE.patch-new/drivers/base/power/trace.c 2007-02-08 13:04:51.000000000 +1100
@@ -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 -ruNp 160-PM_TRACE.patch-old/include/asm-i386/resume-trace.h 160-PM_TRACE.patch-new/include/asm-i386/resume-trace.h
--- 160-PM_TRACE.patch-old/include/asm-i386/resume-trace.h 1970-01-01 10:00:00.000000000 +1000
+++ 160-PM_TRACE.patch-new/include/asm-i386/resume-trace.h 2007-02-07 23:32:23.000000000 +1100
@@ -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 -ruNp 160-PM_TRACE.patch-old/include/asm-x86_64/resume-trace.h 160-PM_TRACE.patch-new/include/asm-x86_64/resume-trace.h
--- 160-PM_TRACE.patch-old/include/asm-x86_64/resume-trace.h 1970-01-01 10:00:00.000000000 +1000
+++ 160-PM_TRACE.patch-new/include/asm-x86_64/resume-trace.h 2007-02-07 23:32:23.000000000 +1100
@@ -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 -ruNp 160-PM_TRACE.patch-old/include/linux/resume-trace.h 160-PM_TRACE.patch-new/include/linux/resume-trace.h
--- 160-PM_TRACE.patch-old/include/linux/resume-trace.h 2007-02-06 14:48:57.000000000 +1100
+++ 160-PM_TRACE.patch-new/include/linux/resume-trace.h 2007-02-07 23:32:23.000000000 +1100
@@ -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 -ruNp 160-PM_TRACE.patch-old/kernel/power/Kconfig 160-PM_TRACE.patch-new/kernel/power/Kconfig
--- 160-PM_TRACE.patch-old/kernel/power/Kconfig 2007-02-06 14:48:57.000000000 +1100
+++ 160-PM_TRACE.patch-new/kernel/power/Kconfig 2007-02-08 13:05:42.000000000 +1100
@@ -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
-
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