xen: add a gcov Kconfig option

Signed-off-by: Wei Liu <wei.liu2@citrix.com>
Acked-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Doug Goldstein <cardoe@cardoe.com>

Config.mk

@@ -20,9 +20,6 @@ or       = $(if $(strip $(1)),$(1),$(if $(strip $(2)),$(2),$(if $(strip $(3)),$(
 debug ?= y
 debug_symbols ?= $(debug)
 
-# Test coverage support
-coverage ?= n
-
 XEN_COMPILE_ARCH    ?= $(shell uname -m | sed -e s/i.86/x86_32/ \
                          -e s/i86pc/x86_32/ -e s/amd64/x86_64/ \
                          -e s/armv7.*/arm32/ -e s/armv8.*/arm64/ \

xen/Kconfig.debug

@@ -28,6 +28,11 @@ config FRAME_POINTER
 	  maybe slower, but it gives very useful debugging information
 	  in case of any Xen bugs.
 
+config GCOV
+       bool "Gcov Support"
+       ---help---
+         Enable gcov (a test coverage program in GCC) support.
+
 config LOCK_PROFILE
 	bool "Lock Profiling"
 	---help---

xen/Rules.mk

@@ -115,7 +115,7 @@ subdir-all := $(subdir-y) $(subdir-n)
 
 $(filter %.init.o,$(obj-y) $(obj-bin-y) $(extra-y)): CFLAGS += -DINIT_SECTIONS_ONLY
 
-ifeq ($(coverage),y)
+ifeq ($(CONFIG_GCOV),y)
 $(filter-out %.init.o $(nogcov-y),$(obj-y) $(obj-bin-y) $(extra-y)): CFLAGS += -fprofile-arcs -ftest-coverage -DTEST_COVERAGE
 endif
 

xen/common/Makefile

@@ -75,7 +75,7 @@ obj-$(CONFIG_TMEM) += $(tmem-y)
 
 subdir-$(CONFIG_X86) += hvm
 
-subdir-$(coverage) += gcov
+subdir-$(CONFIG_GCOV) += gcov
 
 subdir-y += libelf
 subdir-$(CONFIG_HAS_DEVICE_TREE) += libfdt