[PATCHv2] 27/27] build: convert kexec options to CONFIG_KEXEC

[Doug Goldstein <cardoe@cardoe.com>]

Replace kexec := y in Rules.mk with a Kconfig option called CONFIG_KEXEC

Signed-off-by: Doug Goldstein <cardoe@cardoe.com>

CC: Ian Campbell <ian.campbell@citrix.com>
CC: Ian Jackson <ian.jackson@eu.citrix.com>
CC: Jan Beulich <jbeulich@suse.com>
CC: Keir Fraser <keir@xen.org>
CC: Tim Deegan <tim@xen.org>
Signed-off-by: Doug Goldstein <cardoe@cardoe.com>
---
 xen/Rules.mk       |  6 ------
 xen/common/Kconfig | 12 ++++++++++++
 2 files changed, 12 insertions(+), 6 deletions(-)

diff --git a/xen/Rules.mk b/xen/Rules.mk
index 1999ff5..e31be35 100644
--- a/xen/Rules.mk
+++ b/xen/Rules.mk
@@ -10,7 +10,6 @@ lock_profile  ?= n
 crash_debug   ?= n
 frame_pointer ?= n
 lto           ?= n
-kexec         ?= y
 
 -include $(BASEDIR)/include/config/auto.conf
 
@@ -65,11 +64,6 @@ ifneq ($(max_phys_irqs),)
 CFLAGS-y                += -DMAX_PHYS_IRQS=$(max_phys_irqs)
 endif
 
-CONFIG_KEXEC-$(CONFIG_HAS_KEXEC) := $(kexec)
-CONFIG_KEXEC              := $(CONFIG_KEXEC-y)
-
-CFLAGS-$(CONFIG_KEXEC)  += -DCONFIG_KEXEC
-
 AFLAGS-y                += -D__ASSEMBLY__ -include $(BASEDIR)/include/xen/config.h
 
 # Clang's built-in assembler can't handle .code16/.code32/.code64 yet
diff --git a/xen/common/Kconfig b/xen/common/Kconfig
index 58858d2..d46f95f 100644
--- a/xen/common/Kconfig
+++ b/xen/common/Kconfig
@@ -29,4 +29,16 @@ config HAS_KEXEC
 config HAS_GDBSX
 	bool
 
+# Enable/Disable kexec support
+config KEXEC
+	bool "kexec support"
+	default y
+	depends on HAS_KEXEC
+	---help---
+	  Allows a running Xen hypervisor to be replaced with another OS
+	  without rebooting. This is primarily used to execute a crash
+	  environment to collect information on a Xen hypervisor or dom0 crash.
+
+	  If unsure, say Y.
+
 endmenu
-- 
2.4.10