[PATCH v4] powerpc/pseries: Handle UE event for memcpy_mcsafe

[Michael Ellerman]

On Thu, 2020-03-26 at 18:49:16 UTC, Ganesh Goudar wrote:
> memcpy_mcsafe has been implemented for power machines which is used
> by pmem infrastructure, so that an UE encountered during memcpy from
> pmem devices would not result in panic instead a right error code
> is returned. The implementation expects machine check handler to ignore
> the event and set nip to continue the execution from fixup code.
> 
> Appropriate changes are already made to powernv machine check handler,
> make similar changes to pseries machine check handler to ignore the
> the event and set nip to continue execution at the fixup entry if we
> hit UE at an instruction with a fixup entry.
> 
> while we are at it, have a common function which searches the exception
> table entry and updates nip with fixup address, and any future common
> changes can be made in this function that are valid for both architectures.
> 
> powernv changes are made by
> commit 895e3dceeb97 ("powerpc/mce: Handle UE event for memcpy_mcsafe")
> 
> Reviewed-by: Mahesh Salgaonkar <mahesh at linux.vnet.ibm.com>
> Reviewed-by: Santosh S <santosh at fossix.org>
> Signed-off-by: Ganesh Goudar <ganeshgr at linux.ibm.com>

Applied to powerpc next, thanks.

https://git.kernel.org/powerpc/c/efbc4303b255bb80ab1283794b36dd5fe1fb0ec3

cheers