GoboLinux Downloads Documentation Community Recipes Screenshots

GoboLinux Recipe & Package Search Tool

71 versions of Linux.

ProgramAgeSizeByWWWSummary
Linux 4.13.2-r1 926  88794 Luca...
The Linux Kernel.
Linux 4.9.16-r3 1097  100651 Luca...
The Linux Kernel.
Linux 4.9.4-r5 1153  99374 Luca...
The Linux Kernel.
Linux 4.8.2-r2 1219  89394 Luca...
The Linux Kernel.
Linux 4.7.4-r1 1289  82767 Luca...
The Linux Kernel.
Linux 4.7.0-r4 1344  82585 Luca...
The Linux Kernel.
Linux 3.13.3-r1 2224  252629 Luca...
The Linux Kernel.
Linux 3.12.6-r1 2284  238949 Luca...
The Linux Kernel.
Linux 3.9.4-r2 2479  70048 Luca...
The Linux Kernel.
Linux 3.7.1-r2 2652  67579 Luca...
The Linux Kernel.
Linux 3.5.0-r1 2803  124391 Luca...
The Linux Kernel.
Linux 3.4.4-r1 2803  124348 Luca...
The Linux Kernel.
Linux 3.3.6-r1 2803  124410 Luca...
The Linux Kernel.
Linux 3.2.12-r2 2931  124345 Luca...
The Linux Kernel.
Linux 3.2.7-r1 2961  123550 Mich...
The Linux Kernel.
Linux 3.1.1-r1 3066  122907 Mich...
The Linux Kernel.
Linux 3.0.4-r4 3127  122754 Luca...
The Linux Kernel.
Linux 2.6.36.3-r1 3350  116087 Diog...
The Linux Kernel.
Linux 2.6.32.3-r1 3728  117990 Luca...
The Linux Kernel.
Linux 2.6.32-r1 3769  117751 Luca...
The Linux Kernel.
Linux 2.6.31.6-r3 3774  126499 Luca...
The Linux Kernel.
Linux 2.6.30.5-r1 3853  166102 Jona...
The Linux Kernel.
Linux 2.6.29.1-r1 3996  117500 Luca...
The Linux Kernel.
Linux 2.6.28.7-r1 4052  115518 Giam...
The Linux Kernel.
Linux 2.6.28.1-r1 4052  115487 Giam...
The Linux Kernel.
Linux 2.6.28-r1 4052  116681 Mich...
The Linux Kernel.
Linux 2.6.27.8-r1 4052  134160 Giam...
The Linux Kernel.
view entry at GitHub | download recipe.bz2 file
01-gobohide.patch
02-unionfs-2.5_for_2.6.27-rc6.patch
04-thinkpad-acpi-0.21-20081019_v2.6.27.2.patch
05-applesmc-accel-create-check.patch
06-appletouch.patch
07-applesmc-retry-when-accessing-keys.patch
08-applesmc-remove-debugging-messages.patch
09-applesmc_int.patch
10-decrypt_failed_as_debug.patch
Recipe
Resources/BuildInformation
Resources/Dependencies
Resources/Description
cell/01-copy4k-cell.patch
cell/02-memcpy-cell.patch
cell/Recipe
cell/dot-config
i686/01-acpi-dsdt-initrd-v0.9c-2.6.26.patch
i686/Recipe
i686/dot-config
ppc/Recipe
ppc/dot-config
x86_64/Recipe
x86_64/dot-config
Date: Wed, 19 Mar 2008 23:00:04 +0100
Subject: [PATCH] ACPI: initramfs DSDT override support

Permits to load of DSDT (the main ACPI table) from initramfs. In case this
option is selected, the initramfs is parsed at ACPI initialization (very early
boot time) to look for a file called "DSDT.aml". This aims at allowing users to
override the DSDT without recompiling the kernel.

Version 0.9 uses a different approach for reading the initramfs which avoids
using the filesystem infrastructure. It leverages the initramfs unpack code to find
and unpack the DSDT directly into the memory.

v0.9a: Fix compilation on non-ACPI platforms by René Rebe <rene@exactcode.de>
v0.9b: Declare more functions __init by Jan Beulich <jbeulich@novell.com>
v0.9c: Allow root to be / instead of nothing, bug reported by Robert Hampovcan

Signed-off-by: Eric Piel <eric.piel@tremplin-utc.net>
---
 Documentation/acpi/dsdt-override.txt     |   12 +++-
 Documentation/acpi/initramfs-add-dsdt.sh |   43 ++++++++++++++
 Documentation/kernel-parameters.txt      |    3 +
 drivers/acpi/Kconfig                     |   11 ++++
 drivers/acpi/osl.c                       |   24 ++++++++
 init/initramfs.c                         |   89 ++++++++++++++++++++++++++++++
 6 files changed, 180 insertions(+), 2 deletions(-)
 create mode 100644 Documentation/acpi/initramfs-add-dsdt.sh

diff --git a/Documentation/acpi/dsdt-override.txt b/Documentation/acpi/dsdt-override.txt
index febbb1b..5008f25 100644
--- a/Documentation/acpi/dsdt-override.txt
+++ b/Documentation/acpi/dsdt-override.txt
@@ -1,7 +1,15 @@
-Linux supports a method of overriding the BIOS DSDT:
+Linux supports two methods of overriding the BIOS DSDT:
 
 CONFIG_ACPI_CUSTOM_DSDT builds the image into the kernel.
 
-When to use this method is described in detail on the
+CONFIG_ACPI_CUSTOM_DSDT_INITRD adds the image to the initrd.
+
+When to use these methods is described in detail on the
 Linux/ACPI home page:
 http://www.lesswatts.org/projects/acpi/overridingDSDT.php
+
+Note that if both options are used, the DSDT supplied
+by the INITRD method takes precedence.
+
+Documentation/initramfs-add-dsdt.sh is provided for convenience
+for use with the CONFIG_ACPI_CUSTOM_DSDT_INITRD method.
diff --git a/Documentation/acpi/initramfs-add-dsdt.sh b/Documentation/acpi/initramfs-add-dsdt.sh
new file mode 100644
index 0000000..17ef6e8
--- /dev/null
+++ b/Documentation/acpi/initramfs-add-dsdt.sh
@@ -0,0 +1,43 @@
+#!/bin/bash
+# Adds a DSDT file to the initrd (if it's an initramfs)
+# first argument is the name of archive
+# second argument is the name of the file to add
+# The file will be copied as /DSDT.aml
+
+# 20060126: fix "Premature end of file" with some old cpio (Roland Robic)
+# 20060205: this time it should really work
+
+# check the arguments
+if [ $# -ne 2 ]; then
+	program_name=$(basename $0)
+	echo "\
+$program_name: too few arguments
+Usage: $program_name initrd-name.img DSDT-to-add.aml
+Adds a DSDT file to an initrd (in initramfs format)
+
+  initrd-name.img: filename of the initrd in initramfs format
+  DSDT-to-add.aml: filename of the DSDT file to add
+  " 1>&2
+    exit 1
+fi
+
+# we should check it's an initramfs
+
+tempcpio=$(mktemp -d)
+# cleanup on exit, hangup, interrupt, quit, termination
+trap 'rm -rf $tempcpio' 0 1 2 3 15
+
+# extract the archive
+gunzip -c "$1" > "$tempcpio"/initramfs.cpio || exit 1
+
+# copy the DSDT file at the root of the directory so that we can call it "/DSDT.aml"
+cp -f "$2" "$tempcpio"/DSDT.aml
+
+# add the file
+cd "$tempcpio"
+(echo DSDT.aml | cpio --quiet -H newc -o -A -O "$tempcpio"/initramfs.cpio) || exit \
1
+cd "$OLDPWD"
+
+# re-compress the archive
+gzip -c "$tempcpio"/initramfs.cpio > "$1"
+
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index e07c432..6849df2 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -172,6 +172,9 @@ and is between 256 and 4096 characters. It is defined in the \
file
 
 	acpi_no_auto_ssdt	[HW,ACPI] Disable automatic loading of SSDT
 
+	acpi_no_initrd_override	[KNL,ACPI]
+			Disable loading custom ACPI tables from the initramfs
+
 	acpi_os_name=	[HW,ACPI] Tell ACPI BIOS the name of the OS
 			Format: To spoof as Windows 98: ="Microsoft Windows"
 
diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig
index c52fca8..8df213e 100644
--- a/drivers/acpi/Kconfig
+++ b/drivers/acpi/Kconfig
@@ -303,6 +303,17 @@ config ACPI_CUSTOM_DSDT
 	bool
 	default ACPI_CUSTOM_DSDT_FILE != ""
 
+config ACPI_CUSTOM_DSDT_INITRD
+	bool "Read Custom DSDT from initramfs"
+	depends on BLK_DEV_INITRD
+	default n
+	help
+	  This option supports a custom DSDT by optionally loading it from initrd.
+	  See Documentation/acpi/dsdt-override.txt
+
+	  If you are not using this feature now, but may use it later,
+	  it is safe to say Y here.
+
 config ACPI_BLACKLIST_YEAR
 	int "Disable ACPI for systems before Jan 1st this year" if X86_32
 	default 0
diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c
index 235a138..c75f285 100644
--- a/drivers/acpi/osl.c
+++ b/drivers/acpi/osl.c
@@ -96,6 +96,11 @@ static DEFINE_SPINLOCK(acpi_res_lock);
 #define	OSI_STRING_LENGTH_MAX 64	/* arbitrary */
 static char osi_additional_string[OSI_STRING_LENGTH_MAX];
 
+#ifdef CONFIG_ACPI_CUSTOM_DSDT_INITRD
+static __initdata int acpi_no_initrd_override;
+extern struct acpi_table_header *acpi_find_dsdt_initrd(void);
+#endif
+
 /*
  * "Ode to _OSI(Linux)"
  *
@@ -338,6 +343,16 @@ acpi_os_table_override(struct acpi_table_header * existing_table,
 	if (strncmp(existing_table->signature, "DSDT", 4) == 0)
 		*new_table = (struct acpi_table_header *)AmlCode;
 #endif
+#ifdef CONFIG_ACPI_CUSTOM_DSDT_INITRD
+	if ((strncmp(existing_table->signature, "DSDT", 4) == 0) &&
+	    !acpi_no_initrd_override) {
+		struct acpi_table_header *initrd_table;
+
+		initrd_table = acpi_find_dsdt_initrd();
+		if (initrd_table)
+			*new_table = initrd_table;
+	}
+#endif
 	if (*new_table != NULL) {
 		printk(KERN_WARNING PREFIX "Override [%4.4s-%8.8s], "
 			   "this is unsafe: tainting kernel\n",
@@ -348,6 +363,15 @@ acpi_os_table_override(struct acpi_table_header * existing_table,
 	return AE_OK;
 }
 
+#ifdef CONFIG_ACPI_CUSTOM_DSDT_INITRD
+static int __init acpi_no_initrd_override_setup(char *s)
+{
+	acpi_no_initrd_override = 1;
+	return 1;
+}
+__setup("acpi_no_initrd_override", acpi_no_initrd_override_setup);
+#endif
+
 static irqreturn_t acpi_irq(int irq, void *dev_id)
 {
 	u32 handled;
diff --git a/init/initramfs.c b/init/initramfs.c
index 8eeeccb..84f9a01 100644
--- a/init/initramfs.c
+++ b/init/initramfs.c
@@ -6,6 +6,9 @@
 #include <linux/delay.h>
 #include <linux/string.h>
 #include <linux/syscalls.h>
+#ifdef ACPI_CONFIG
+#include <acpi/acpi.h>
+#endif
 
 static __initdata char *message;
 static void __init error(char *x)
@@ -90,6 +93,12 @@ static __initdata unsigned long body_len, name_len;
 static __initdata uid_t uid;
 static __initdata gid_t gid;
 static __initdata unsigned rdev;
+#ifdef CONFIG_ACPI_CUSTOM_DSDT_INITRD
+static __initdata char *file_looked_for;
+static __initdata struct acpi_table_header *file_mem;
+#else
+const char *file_looked_for = NULL;
+#endif
 
 static void __init parse_header(char *s)
 {
@@ -123,6 +132,7 @@ static __initdata enum state {
 	SkipIt,
 	GotName,
 	CopyFile,
+	CopyFileMem,
 	GotSymlink,
 	Reset
 } state, next_state;
@@ -259,6 +269,54 @@ static void __init clean_path(char *path, mode_t mode)
 
 static __initdata int wfd;
 
+#ifdef CONFIG_ACPI_CUSTOM_DSDT_INITRD
+static __init int is_file_looked_for(char *filename)
+{
+	char *tmp_collected = collected;
+	if (file_looked_for == NULL)
+		return 0;
+	if (!S_ISREG(mode))
+		return 0;
+	/* remove the leading / */
+	while (*tmp_collected == '/')
+		tmp_collected++;
+	return (strcmp(tmp_collected, file_looked_for) == 0);
+}
+
+static int __init do_copy_mem(void)
+{
+	static void *file_current; /* current position in the memory */
+	if (file_mem == NULL) {
+		if (body_len < 4) { /* check especially against empty files */
+			error("file is less than 4 bytes");
+			return 1;
+		}
+		file_mem = kmalloc(body_len, GFP_ATOMIC);
+		if (!file_mem) {
+			error("failed to allocate enough memory");
+			return 1;
+		}
+		file_current = file_mem;
+	}
+	if (count >= body_len) {
+		memcpy(file_current, victim, body_len);
+		eat(body_len);
+		file_looked_for = NULL; /* don't find files with same name */
+		state = SkipIt;
+		return 0;
+	} else {
+		memcpy(file_current, victim, count);
+		file_current += count;
+		body_len -= count;
+		eat(count);
+		return 1;
+	}
+}
+#else
+static inline int is_file_looked_for(char *filename) {return 0;}
+#define do_copy_mem NULL /* because it is used as a pointer */
+#endif
+
 static int __init do_name(void)
 {
 	state = SkipIt;
@@ -267,6 +325,8 @@ static int __init do_name(void)
 		free_hash();
 		return 0;
 	}
+	if (is_file_looked_for(file_looked_for))
+		state = CopyFileMem;
 	if (dry_run)
 		return 0;
 	clean_path(collected, mode);
@@ -333,6 +393,7 @@ static __initdata int (*actions[])(void) = {
 	[SkipIt]	= do_skip,
 	[GotName]	= do_name,
 	[CopyFile]	= do_copy,
+	[CopyFileMem]	= do_copy_mem,
 	[GotSymlink]	= do_symlink,
 	[Reset]		= do_reset,
 };
@@ -578,3 +639,31 @@ static int __init populate_rootfs(void)
 	return 0;
 }
 rootfs_initcall(populate_rootfs);
+
+#ifdef CONFIG_ACPI_CUSTOM_DSDT_INITRD
+struct __init acpi_table_header *acpi_find_dsdt_initrd(void)
+{
+	char *err, *ramfs_dsdt_name = "DSDT.aml";
+
+	printk(KERN_INFO "ACPI: Checking initramfs for custom DSDT\n");
+	file_mem = NULL;
+	file_looked_for = ramfs_dsdt_name;
+	err = unpack_to_rootfs((char *)initrd_start,
+			initrd_end - initrd_start, 1);
+	file_looked_for = NULL;
+
+	if (err) {
+		/*
+		 * Even if reading the DSDT file was successful,
+		 * we give up if the initramfs cannot be entirely read.
+		 */
+		kfree(file_mem);
+		printk(KERN_ERR "ACPI: Aborded because %s.\n", err);
+		return NULL;
+	}
+	if (file_mem)
+		printk(KERN_INFO "ACPI: Found DSDT in %s.\n", ramfs_dsdt_name);
+
+	return file_mem;
+}
+#endif
-- 
1.5.6.4

Linux 2.6.27.4-r3 4052  149529 Luca...
The Linux Kernel.
Linux 2.6.25.17-r1 4052  172834 Giam...
The Linux Kernel.
Linux 2.6.25.16-r1 4052  166500 Giam...
The Linux Kernel.
Linux 2.6.25.10-r2 4052  165320 Giam...
The Linux Kernel.
Linux 2.6.25.7-r1 4052  157294 Giam...
The Linux Kernel.
Linux 2.6.25.4-r1 4052  133017 Hopp...
The Linux Kernel.
Linux 2.6.25-r1 4052  133216 Luca...
The Linux Kernel.
Linux 2.6.24.4-r5 4052  150733
The Linux Kernel.
Linux 2.6.24.3-r5 4052  150221 Luca...
The Linux Kernel.
Linux 2.6.24.2-r3 4052  146488 Giam...
The Linux Kernel.
Linux 2.6.24.1-r1 4052  146454 Giam...
The Linux Kernel.
Linux 2.6.24-r1 4052  146428 Luca...
The Linux Kernel.
Linux 2.6.23.8-r4 4052  155842 Luca...
The Linux Kernel.
Linux 2.6.22.7-r4 4052  114727 Luca...
The Linux Kernel.
Linux 2.6.22.1-r1 4052  121391 Luca...
The Linux Kernel.
Linux 2.6.21.1-r3 4052  118854 Luca...
The Linux Kernel.
Linux 2.6.20.7-r1 4052  117945 Luca...
The Linux Kernel.
Linux 2.6.20.4-r3 4052  151150 Luca...
The Linux Kernel.
Linux 2.6.20-r1 4052  106429 Luca...
The Linux Kernel.
Linux 2.6.18.3-r2 4052  111124 Luca...
The Linux Kernel.
Linux 2.6.17.11-r1 4052  164053 Luca...
The Linux Kernel.
Linux 2.6.17.3-r1 4052  165067 Luca...
The Linux Kernel.
Linux 2.6.16.20-r1 4052  133625 Luca...
The Linux Kernel.
Linux 2.6.16.14-r1 4052  168270 Luca...
The Linux Kernel.
Linux 2.6.15.5-r1 4052  224686 Jona...
The Linux Kernel.
Linux 2.6.15.2-r1 4052  177165 Carl...
The Linux Kernel.
Linux 2.6.15.1-r1 4052  149219 Jona...
The Linux Kernel.
Linux 2.6.15-r1 4052  149214 Luca...
The Linux Kernel.
Linux 2.6.14.4-r1 4052  150166 Jona...
The Linux Kernel.
Linux 2.6.14.3-r1 4052  150060 Jona...
The Linux Kernel.
Linux 2.6.14.2-r1 4052  149791 Carl...
The Linux Kernel.
Linux 2.6.13.4-r1 4052  149559 Luca...
The Linux Kernel.
Linux 2.6.13.2-r1 4052  56611 Jona...
The Linux Kernel.
Linux 2.6.13.1-r1 4052  56378 Luca...
The Linux Kernel.
Linux 2.6.12.2-r1 4052  50355 Luca...
The Linux Kernel.
Linux 2.6.11.9-r1 4052  98969 Luca...
The Linux Kernel.
Linux 2.6.11.8-r1 4052  109424 Jona...
The Linux Kernel.
Linux 2.6.11-r1 4052  99032 Luca...
The Linux Kernel.
Linux 2.6.10-r1 4052  65969 Luca...
The Linux Kernel.
Linux 2.6.9-r1 4052  278461 Luca...
The Linux Kernel.
Linux 2.6.8.1-r1 4052  35576 Luca...
The Linux Kernel.
Linux 2.6.7-r1 4052  22610 Luca...
The Linux Kernel.
Linux 2.6.6-r1 4052  21958 Luca...
The Linux Kernel.
Linux 2.4.26-r1 4052  22359 Luca...
The Linux Kernel.