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zdev: Integrate firmware auto-configuration with dracut

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Add a dracut hook that applies firmware-provided I/O configuration data
as auto-configuration during boot. This way, all I/O devices configured
by DPM are automatically brought online without further user
interaction.

This mechanism is active by default. It can be deactivated by specifying
the following parameter on the kernel command line:

  rd.zdev=no-auto

Signed-off-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com>
Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
This commit is contained in:
Peter Oberparleiter
2017-09-01 11:05:56 +02:00
committed by Jan Höppner
parent fe68ec513d
commit 3fb356ebd2
3 changed files with 55 additions and 5 deletions
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zdev/dracut/Makefile
+3
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@@ -11,11 +11,14 @@ ZDEVDIR := 95zdev
# performs the following functions when dracut is run:
#
# - copy the persistent root device configuration to the initial ram disk
# - install a boot-time hook to apply firmware-provided configuration data
# to the system
#
ifeq ($(HAVE_DRACUT),1)
install:
$(INSTALL) -m 755 -d $(DESTDIR)$(MODDIR)
$(INSTALL) -m 755 -d $(DESTDIR)$(MODDIR)/$(ZDEVDIR)
$(INSTALL) -m 755 $(ZDEVDIR)/module-setup.sh \
$(ZDEVDIR)/parse-zdev.sh \
$(DESTDIR)$(MODDIR)/$(ZDEVDIR)/
endif