[PATCH] powerpc/mm: Invalidate partition table cache on host proc tbl base update

[Michael Ellerman]

Suraj Jitindar Singh <sjitindarsingh at gmail.com> writes:

> The host process table base is stored in the partition table by calling
> the function native_register_process_table(). Currently this just sets
> the entry in memory and is missing a proceeding cache invalidation
> instruction. Any update to the partition table should be followed by a
> cache invalidation instruction specifying invalidation of the caching of
> any partition table entries (RIC = 2, PRS = 0).
>
> We already have a function to update the partition table with the
> required cache invalidation instructions - mmu_partition_table_set_entry().
> Update the native_register_process_table() function to call
> mmu_partition_table_set_entry(), this ensures all appropriate
> invalidation will be performed.

Without this patch the kernel will:
 [ ] work normally
 [ ] randomly crash
 [ ] catch fire

?

cheers