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linux/kernel/livepatch
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Steven Rostedt (VMware) 2860cd8a23 livepatch: Use the default ftrace_ops instead of REGS when ARGS is available 
When CONFIG_HAVE_DYNAMIC_FTRACE_WITH_ARGS is available, the ftrace call
will be able to set the ip of the calling function. This will improve the
performance of live kernel patching where it does not need all the regs to
be stored just to change the instruction pointer.

If all archs that support live kernel patching also support
HAVE_DYNAMIC_FTRACE_WITH_ARGS, then the architecture specific function
klp_arch_set_pc() could be made generic.

It is possible that an arch can support HAVE_DYNAMIC_FTRACE_WITH_ARGS but
not HAVE_DYNAMIC_FTRACE_WITH_REGS and then have access to live patching.

Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Jiri Kosina <jikos@kernel.org>
Cc: live-patching@vger.kernel.org
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Miroslav Benes <mbenes@suse.cz>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
2020-11-13 12:15:28 -05:00
..
core.c livepatch: Make klp_apply_object_relocs static 2020-05-11 00:31:38 +02:00
core.h livepatch: Keep replaced patches until post_patch callback is called 2019-11-01 13:08:08 +01:00
Kconfig livepatch: Use the default ftrace_ops instead of REGS when ARGS is available 2020-11-13 12:15:28 -05:00
Makefile livepatch: Basic API to track system state changes 2019-11-01 13:08:14 +01:00
patch.c livepatch: Use the default ftrace_ops instead of REGS when ARGS is available 2020-11-13 12:15:28 -05:00
patch.h livepatch: Remove Nop structures when unused 2019-01-11 20:51:24 +01:00
shadow.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 13 2019-05-21 11:28:45 +02:00
state.c kernel/: fix repeated words in comments 2020-10-16 11:11:19 -07:00
state.h livepatch: Allow to distinguish different version of system state changes 2019-11-01 13:08:19 +01:00
transition.c livepatch: Keep replaced patches until post_patch callback is called 2019-11-01 13:08:08 +01:00
transition.h livepatch: Remove signal sysfs attribute 2019-01-16 22:09:33 +01:00