[Xen-devel] [PATCH for-next RFC 1/8] x86: introduce CONFIG_GUEST and move code

[Wei Liu <wl@xxxxxxx>]

Xen is able to run as a guest on Xen. We plan to make it able to run
on Hyper-V as well.

Introduce CONFIG_GUEST which is set to true if either running on Xen
or Hyper-V is desired. Restructure code hierarchy for new code to
come.

No functional change intended.

Signed-off-by: Wei Liu <liuwe@xxxxxxxxxxxxx>
---
 xen/arch/x86/Kconfig                          | 4 ++++
 xen/arch/x86/Makefile                         | 2 +-
 xen/arch/x86/guest/Makefile                   | 5 +----
 xen/arch/x86/guest/xen/Makefile               | 4 ++++
 xen/arch/x86/guest/{ => xen}/hypercall_page.S | 0
 xen/arch/x86/guest/{ => xen}/pvh-boot.c       | 0
 xen/arch/x86/guest/{ => xen}/xen.c            | 0
 7 files changed, 10 insertions(+), 5 deletions(-)
 create mode 100644 xen/arch/x86/guest/xen/Makefile
 rename xen/arch/x86/guest/{ => xen}/hypercall_page.S (100%)
 rename xen/arch/x86/guest/{ => xen}/pvh-boot.c (100%)
 rename xen/arch/x86/guest/{ => xen}/xen.c (100%)

diff --git a/xen/arch/x86/Kconfig b/xen/arch/x86/Kconfig
index 288dc6c042..584bdc1bb8 100644
--- a/xen/arch/x86/Kconfig
+++ b/xen/arch/x86/Kconfig
@@ -160,8 +160,12 @@ config XEN_ALIGN_2M
 
 endchoice
 
+config GUEST
+       bool
+
 config XEN_GUEST
        def_bool n
+       select GUEST
        prompt "Xen Guest"
        ---help---
          Support for Xen detecting when it is running under Xen.
diff --git a/xen/arch/x86/Makefile b/xen/arch/x86/Makefile
index 2443fd2cc5..99a12d0090 100644
--- a/xen/arch/x86/Makefile
+++ b/xen/arch/x86/Makefile
@@ -1,7 +1,7 @@
 subdir-y += acpi
 subdir-y += cpu
 subdir-y += genapic
-subdir-$(CONFIG_XEN_GUEST) += guest
+subdir-$(CONFIG_GUEST) += guest
 subdir-$(CONFIG_HVM) += hvm
 subdir-y += mm
 subdir-$(CONFIG_XENOPROF) += oprofile
diff --git a/xen/arch/x86/guest/Makefile b/xen/arch/x86/guest/Makefile
index 26fb4b1007..6806f04947 100644
--- a/xen/arch/x86/guest/Makefile
+++ b/xen/arch/x86/guest/Makefile
@@ -1,4 +1 @@
-obj-y += hypercall_page.o
-obj-y += xen.o
-
-obj-bin-$(CONFIG_PVH_GUEST) += pvh-boot.init.o
+subdir-$(CONFIG_XEN_GUEST) += xen
diff --git a/xen/arch/x86/guest/xen/Makefile b/xen/arch/x86/guest/xen/Makefile
new file mode 100644
index 0000000000..26fb4b1007
--- /dev/null
+++ b/xen/arch/x86/guest/xen/Makefile
@@ -0,0 +1,4 @@
+obj-y += hypercall_page.o
+obj-y += xen.o
+
+obj-bin-$(CONFIG_PVH_GUEST) += pvh-boot.init.o
diff --git a/xen/arch/x86/guest/hypercall_page.S 
b/xen/arch/x86/guest/xen/hypercall_page.S
similarity index 100%
rename from xen/arch/x86/guest/hypercall_page.S
rename to xen/arch/x86/guest/xen/hypercall_page.S
diff --git a/xen/arch/x86/guest/pvh-boot.c b/xen/arch/x86/guest/xen/pvh-boot.c
similarity index 100%
rename from xen/arch/x86/guest/pvh-boot.c
rename to xen/arch/x86/guest/xen/pvh-boot.c
diff --git a/xen/arch/x86/guest/xen.c b/xen/arch/x86/guest/xen/xen.c
similarity index 100%
rename from xen/arch/x86/guest/xen.c
rename to xen/arch/x86/guest/xen/xen.c
-- 
2.20.1


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