Commit 2b9ee60d authored May 29, 2021 by Cheng Jian Committed by Zheng Zengkai Jun 04, 2021

livepatch/core: Add livepatch consistency depends



euler inclusion
category: feature
Bugzilla: 51921
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: Cheng Jian <cj.chengjian@huawei.com>
Reviewed-by: Li Bin <huawei.libin@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>

Signed-off-by: Dong Kai <dongkai11@huawei.com>

Signed-off-by: Ye Weihua <yeweihua4@huawei.com>
Reviewed-by: Yang Jihong <yangjihong1@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>

parent 853bec28

kernel/livepatch/Kconfig

+4 −0

Original line number	Diff line number	Diff line
		@@ -39,12 +39,14 @@ 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

		config LIVEPATCH_WO_FTRACE
		bool "without ftrace"
		depends on HAVE_LIVEPATCH_WO_FTRACE
		select LIVEPATCH_STOP_MACHINE_CONSISTENCY
		help
		Supports kernel live patching without ftrace

		@@ -60,6 +62,7 @@ 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:
		@@ -70,6 +73,7 @@ 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