[PATCH 3/3] dracut: Implement ACPI table overriding

[Thomas Renninger <trenn-l3A5Bk7waGM@public.gmane.org>]

An example config file for this feature could be:

/etc/dracut.conf.d/03-acpi-override.conf

with this content:
acpi_override="yes"
acpi_table_dir="/etc/dracut.conf.d/acpi_tables"

Then all files ending with *.aml will be put into the early cpio
(kernel/firmware/acpi) and will be used to replace the BIOS provided tables
if the kernel supports this feature.

Signed-off-by: Thomas Renninger <trenn-l3A5Bk7waGM@public.gmane.org>
---
 dracut.sh |   11 +++++++++++
 1 files changed, 11 insertions(+), 0 deletions(-)

diff --git a/dracut.sh b/dracut.sh
index 671f53f..352b546 100755
--- a/dracut.sh
+++ b/dracut.sh
@@ -1327,6 +1327,17 @@ if [[ $early_microcode = yes ]]; then
     done
 fi
 
+if [[ $acpi_override = yes ]] && [[ -d $acpi_table_dir ]]; then
+    dinfo "*** Packaging ACPI tables to override BIOS provided ones ***"
+    _dest_dir="$early_cpio_dir/d/kernel/firmware/acpi"
+    mkdir -p $_dest_dir
+    for table in $acpi_table_dir/*.aml; do
+        dinfo "   Adding ACPI table: $table"
+        cp $table $_dest_dir
+        create_early_cpio="yes"
+    done
+fi
+
 rm -f -- "$outfile"
 dinfo "*** Creating image file ***"
 if [[ $create_early_cpio = yes ]]; then
-- 
1.7.6.1