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[Xen-devel] [PATCH v2 2/2] x86, arm, platform, xen, kconfig: add xen defconfig helper

From: "Luis R. Rodriguez" <mcgrof@xxxxxxxx>

This lets you build a kernel which can support xen dom0
or xen guests by just using:

   make xenconfig

on both x86 and arm64 kernels. This also splits out the
options which are available currently to be built with x86
and 'make ARCH=arm64' under a shared config.

Technically xen supports a dom0 kernel and also a guest
kernel configuration but upon review with the xen team
since we don't have many dom0 options its best to just
combine these two into one.

Cc: Josh Triplett <josh@xxxxxxxxxxxxxxxx>
Cc: Borislav Petkov <bp@xxxxxxx>
Cc: Pekka Enberg <penberg@xxxxxxxxxx>
Cc: David Rientjes <rientjes@xxxxxxxxxx>
Cc: Michal Marek <mmarek@xxxxxxx>
Cc: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
Cc: penberg@xxxxxxxxxx
Cc: levinsasha928@xxxxxxxxx
Cc: mtosatti@xxxxxxxxxx
Cc: fengguang.wu@xxxxxxxxx
Cc: David Vrabel <david.vrabel@xxxxxxxxxx>
Cc: Ian Campbell <Ian.Campbell@xxxxxxxxxx>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
Cc: xen-devel@xxxxxxxxxxxxxxxxxxxx
Reviewed-by: Josh Triplett <josh@xxxxxxxxxxxxxxxx>
Signed-off-by: Luis R. Rodriguez <mcgrof@xxxxxxxx>
 arch/x86/configs/xen.config |  7 +++++++
 kernel/configs/xen.config   | 30 ++++++++++++++++++++++++++++++
 scripts/kconfig/Makefile    |  5 +++++
 3 files changed, 42 insertions(+)
 create mode 100644 arch/x86/configs/xen.config
 create mode 100644 kernel/configs/xen.config

diff --git a/arch/x86/configs/xen.config b/arch/x86/configs/xen.config
new file mode 100644
index 0000000..92b8587f
--- /dev/null
+++ b/arch/x86/configs/xen.config
@@ -0,0 +1,7 @@
+# x86 xen specific config options
+# CONFIG_XEN_DEBUG_FS is not set
diff --git a/kernel/configs/xen.config b/kernel/configs/xen.config
new file mode 100644
index 0000000..d2ec010
--- /dev/null
+++ b/kernel/configs/xen.config
@@ -0,0 +1,30 @@
+# generic config
diff --git a/scripts/kconfig/Makefile b/scripts/kconfig/Makefile
index ff612b0..f4a8f89 100644
--- a/scripts/kconfig/Makefile
+++ b/scripts/kconfig/Makefile
@@ -117,6 +117,10 @@ PHONY += kvmconfig
        $(call mergeconfig,kvm_guest)
+PHONY += xenconfig
+       $(call mergeconfig,xen)
 PHONY += tinyconfig
 tinyconfig: allnoconfig
        $(call mergeconfig,tiny)
@@ -142,6 +146,7 @@ help:
        @echo  '  listnewconfig   - List new options'
        @echo  '  olddefconfig    - Same as silentoldconfig but sets new 
symbols to their default value'
        @echo  '  kvmconfig       - Enable additional options for kvm guest 
kernel support'
+       @echo  '  xenconfig       - Enable additional options for xen dom0 and 
guest kernel support'
        @echo  '  tinyconfig      - Configure the tiniest possible kernel'
 # lxdialog stuff

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