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Author SHA1 Message Date
Kamalesh Babulal b766922e65 powerpc/livepatch: Remove klp_write_module_reloc() stub 
commit 425595a7fc ("livepatch: reuse module loader code
to write relocations") offloads livepatch module relocation
write to arch specific module loader code.

Remove unused klp_write_module_reloc() function stub.

Signed-off-by: Kamalesh Babulal <kamalesh@linux.vnet.ibm.com>
Acked-by: Balbir Singh <bsingharora@gmail.com>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Acked-by: Josh Poimboeuf <jpoimboe@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
 2016-12-19 11:15:25 +01:00
Michael Ellerman 5d31a96e6c powerpc/livepatch: Add livepatch stack to struct thread_info 
In order to support live patching we need to maintain an alternate
stack of TOC & LR values. We use the base of the stack for this, and
store the "live patch stack pointer" in struct thread_info.

Unlike the other fields of thread_info, we can not statically initialise
that value, so it must be done at run time.

This patch just adds the code to support that, it is not enabled until
the next patch which actually adds live patch support.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Acked-by: Balbir Singh <bsingharora@gmail.com>
 2016-04-14 15:47:06 +10:00
Michael Ellerman f63e6d8987 powerpc/livepatch: Add livepatch header 
Add the powerpc specific livepatch definitions. In particular we provide
a non-default implementation of klp_get_ftrace_location().

This is required because the location of the mcount call is not constant
when using -mprofile-kernel (which we always do for live patching).

Signed-off-by: Torsten Duwe <duwe@suse.de>
Signed-off-by: Balbir Singh <bsingharora@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
 2016-04-14 15:47:06 +10:00