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authorMarkus Gaugusch <dsdt@gaugusch.at>2008-02-05 00:04:06 +0100
committerLen Brown <len.brown@intel.com>2008-02-06 22:07:41 -0500
commit71fc47a9adf8ee89e5c96a47222915c5485ac437 (patch)
treea2eaefbb703dde933a9726eae7e6399761d40136 /drivers/acpi/Kconfig
parent488b5ec871191359b9b79262a3d48456dae7ea5f (diff)
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ACPI: basic initramfs DSDT override support
The basics of DSDT from initramfs. In case this option is selected, populate_rootfs() is called a bit earlier to have the initramfs content available during ACPI initialization. This is a very similar path to the one available at http://gaugusch.at/kernel.shtml but with some update in the documentation, default set to No and the change of populate_rootfs() the "Jeff Mahony way" (which avoids reading the initramfs twice). Signed-off-by: Thomas Renninger <trenn@suse.de> Signed-off-by: Eric Piel <eric.piel@tremplin-utc.net> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/acpi/Kconfig')
-rw-r--r--drivers/acpi/Kconfig17
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig
index ccf6ea9..0442ae1 100644
--- a/drivers/acpi/Kconfig
+++ b/drivers/acpi/Kconfig
@@ -274,6 +274,23 @@ config ACPI_CUSTOM_DSDT_FILE
Enter the full path name to the file which includes the AmlCode
declaration.
+config ACPI_CUSTOM_DSDT_INITRD
+ bool "Read Custom DSDT from initramfs"
+ depends on BLK_DEV_INITRD
+ default n
+ help
+ The DSDT (Differentiated System Description Table) often needs to be
+ overridden because of broken BIOS implementations. If this feature is
+ activated you will be able to provide a customized DSDT by adding it
+ to your initramfs. If your mkinitrd tool does not support this feature
+ a script is provided in the documentation. For more details see
+ <file:Documentation/dsdt-initrd.txt> or <http://gaugusch.at/kernel.shtml>.
+ If there is no table found, it will fall-back to the custom DSDT
+ in-kernel (if activated) or to the DSDT from the BIOS.
+
+ Even if you do not need a new one at the moment, you may want to use a
+ better DSDT 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
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