[PATCH 1/2] Kconfig: Add option to enable support for running as a Xen HVM guests BIOS

[Ian Campbell <ian.campbell@citrix.com>]

Do this by subsuming the existing COREBOOT boolean into a choice
option of COREBOOT, XEN and GENERIC.

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
---
 src/Kconfig  |   17 ++++++++++++++++-
 src/shadow.c |    4 ++--
 2 files changed, 18 insertions(+), 3 deletions(-)

diff --git a/src/Kconfig b/src/Kconfig
index 3133d88..fd7de41 100644
--- a/src/Kconfig
+++ b/src/Kconfig
@@ -4,12 +4,27 @@ mainmenu "SeaBIOS Configuration"
 
 menu "General Features"
 
+    choice
+        prompt "Select target environment"
+        default GENERIC
+
     config COREBOOT
         bool "Build for coreboot"
-        default n
         help
             Configure as a coreboot payload.
 
+    config XEN
+        bool "Build for Xen HVM"
+        help
+            Configure to be used by xen hvmloader, for a HVM guest.
+
+    config GENERIC
+        bool "Build for generic target environment"
+        help
+            Configure to be used in a generic target environment.
+
+    endchoice
+
     config THREADS
         bool "Parallelize hardware init"
         default y
diff --git a/src/shadow.c b/src/shadow.c
index ed530e0..a778701 100644
--- a/src/shadow.c
+++ b/src/shadow.c
@@ -102,7 +102,7 @@ static const struct pci_device_id dram_controller_make_writable_tbl[] = {
 void
 make_bios_writable(void)
 {
-    if (CONFIG_COREBOOT)
+    if (CONFIG_COREBOOT || CONFIG_XEN)
         return;
 
     dprintf(3, "enabling shadow ram\n");
@@ -127,7 +127,7 @@ static const struct pci_device_id dram_controller_make_readonly_tbl[] = {
 void
 make_bios_readonly(void)
 {
-    if (CONFIG_COREBOOT)
+    if (CONFIG_COREBOOT || CONFIG_XEN)
         return;
 
     dprintf(3, "locking shadow ram\n");
-- 
1.7.2.5