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x86, platform, kconfig: move kvmconfig functionality to a helper 

The new mergeconfig helper makes it easier to add other partial
configurations similar to kvmconfig.  Architecture-independent portions
of those partial configurations should go in
kernel/configs/${name}.config, and architecture-dependent portions
should go in arch/${arch}/configs/${name}.config.

Based on a patch by Luis R. Rodriguez <mcgrof@suse.com>.
Originally-Signed-off-by: Luis R. Rodriguez <mcgrof@suse.com>

Modified to make the helper name more general than just virtualization,
support architecture-dependent and architecture-independent partial
configurations, move the helper and kvmconfig to
scripts/kconfig/Makefile, and factor out more of the common file path.

Signed-off-by: Josh Triplett <josh@joshtriplett.org>
This commit is contained in:
Josh Triplett 2014-08-06 15:21:00 -07:00
parent 85417aef44
commit 3aaefce103
2 changed files with 14 additions and 7 deletions
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7
arch/x86/Makefile
View File

@ -247,12 +247,6 @@ archclean:
$(Q)$(MAKE) $(clean)=$(boot)
$(Q)$(MAKE) $(clean)=arch/x86/tools
PHONY += kvmconfig
kvmconfig:
$(if $(wildcard $(objtree)/.config),, $(error You need an existing .config for this target))
$(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh -m -O $(objtree) $(objtree)/.config $(srctree)/arch/x86/configs/kvm_guest.config
$(Q)yes "" | $(MAKE) -f $(srctree)/Makefile oldconfig
define archhelp
echo '* bzImage - Compressed kernel image (arch/x86/boot/bzImage)'
echo ' install - Install kernel using'
@ -266,5 +260,4 @@ define archhelp
echo ' bzdisk/fdimage*/isoimage also accept:'
echo ' FDARGS="..." arguments for the booted kernel'
echo ' FDINITRD=file initrd for the booted kernel'
echo ' kvmconfig - Enable additional options for guest kernel support'
endef

14
scripts/kconfig/Makefile
View File

@ -104,6 +104,19 @@ endif
%_defconfig: $(obj)/conf
$(Q)$< --defconfig=arch/$(SRCARCH)/configs/$@ $(Kconfig)
configfiles=$(wildcard $(srctree)/kernel/configs/$(1).config $(srctree)/arch/$(SRCARCH)/configs/$(1).config)
define mergeconfig
$(if $(wildcard $(objtree)/.config),, $(error You need an existing .config for this target))
$(if $(call configfiles,$(1)),, $(error No configuration exists for this target on this architecture))
$(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh -m -O $(objtree) $(objtree)/.config $(call configfiles,$(1))
$(Q)yes "" | $(MAKE) -f $(srctree)/Makefile oldconfig
endef
PHONY += kvmconfig
kvmconfig:
$(call mergeconfig,kvm_guest)
# Help text used by make help
help:
@echo ' config - Update current config utilising a line-oriented program'
@ -124,6 +137,7 @@ help:
@echo ' randconfig - New config with random answer to all options'
@echo ' listnewconfig - List new options'
@echo ' olddefconfig - Same as silentoldconfig but sets new symbols to their default value'
@echo ' kvmconfig - Enable additional options for guest kernel support'
# lxdialog stuff
check-lxdialog := $(srctree)/$(src)/lxdialog/check-lxdialog.sh