livepatch/core: add livepatch consistency depends

euler inclusion
category: feature
Bugzilla: 5507
CVE: N/A

----------------------------------------

Now, arm64 don't support DYNAMIC_FTRACE_WITH_REGS and RELIABLE_STACKTRACE.
which the first is necessary to implement livepatch with ftrace and the
second allow to implement per-task consistency.

So. arm64 only support LIVEPATCH_WO_FTRACE and STOP_MACHINE_CONSISTENCY.
but other architectures can work under LIVEPATCH_FTRACE with
PER_TASK_CONSISTENCY. commit the depends to avoid incorrect configuration.
Signed-off-by: NCheng Jian <cj.chengjian@huawei.com>
Reviewed-by: NLi Bin <huawei.libin@huawei.com>
Signed-off-by: NYang Yingliang <yangyingliang@huawei.com>

kernel/livepatch/Kconfig

@@ -37,6 +37,7 @@ config LIVEPATCH_FTRACE
 	bool "based on ftrace"
 	depends on HAVE_LIVEPATCH_FTRACE
 	depends on DYNAMIC_FTRACE_WITH_REGS
+	select LIVEPATCH_PER_TASK_CONSISTENCY
 	help
 	  Supports kernel live patching based on ftrace
 
@@ -44,6 +45,7 @@ config LIVEPATCH_WO_FTRACE
 	bool "without ftrace"
 	depends on HAVE_LIVEPATCH_WO_FTRACE
 	depends on DEBUG_INFO
+	select LIVEPATCH_STOP_MACHINE_CONSISTENCY
 	help
 	  Supports kernel live patching without ftrace
 
@@ -59,6 +61,7 @@ choice
 
 config LIVEPATCH_PER_TASK_CONSISTENCY
 	bool "per task consistency"
+	depends on LIVEPATCH_FTRACE
 	help
 	  Use basic per-task consistency model
 	  It's a hybrid of kGraft and kpatch:
@@ -69,6 +72,7 @@ config LIVEPATCH_PER_TASK_CONSISTENCY
 
 config LIVEPATCH_STOP_MACHINE_CONSISTENCY
 	bool "stop machine consistency"
+	depends on LIVEPATCH_WO_FTRACE
 	help
 	  Use stop machine consistency model
 	  stop-machine consistency and kpatch's stack