[Xen-devel] [PATCH v2] x86/kconfig: Introduce CONFIG_PV and CONFIG_HVM

[Andrew Cooper <andrew.cooper3@xxxxxxxxxx>]

Making PV and HVM guests individually compilable is useful as a reduction in
hypervisor size, and as an aid to enforcing clean API boundaries.

Introduce CONFIG_PV and CONFIG_HVM, although there is a lot of work to do
until either can actually be disabled.

Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
---
CC: Jan Beulich <JBeulich@xxxxxxxx>

v2:
 * Reduce to silent forms.  For build testing, manually invert the def_bool.
---
 xen/arch/x86/Kconfig  | 6 ++++++
 xen/arch/x86/Makefile | 4 ++--
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/xen/arch/x86/Kconfig b/xen/arch/x86/Kconfig
index 96ca2bf..30c2769 100644
--- a/xen/arch/x86/Kconfig
+++ b/xen/arch/x86/Kconfig
@@ -32,6 +32,12 @@ menu "Architecture Features"
 
 source "arch/Kconfig"
 
+config PV
+       def_bool y
+
+config HVM
+       def_bool y
+
 config SHADOW_PAGING
         bool "Shadow Paging"
         default y
diff --git a/xen/arch/x86/Makefile b/xen/arch/x86/Makefile
index d6980b5..f75eca0 100644
--- a/xen/arch/x86/Makefile
+++ b/xen/arch/x86/Makefile
@@ -1,10 +1,10 @@
 subdir-y += acpi
 subdir-y += cpu
 subdir-y += genapic
-subdir-y += hvm
+subdir-$(CONFIG_HVM) += hvm
 subdir-y += mm
 subdir-$(CONFIG_XENOPROF) += oprofile
-subdir-y += pv
+subdir-$(CONFIG_PV) += pv
 subdir-y += x86_64
 
 alternative-y := alternative.init.o
-- 
2.1.4


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