powerpc/64s/radix: Fix memory hot-unplug page table split

create_physical_mapping expects physical addresses, but splitting
these mapping on hot unplug is supplying virtual (effective)
addresses.

Fixes: 4dd5f8a99e791 ("powerpc/mm/radix: Split linear mapping on hot-unplug")
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20190724084638.24982-2-npiggin@gmail.com

diff --git a/arch/powerpc/mm/book3s64/radix_pgtable.c b/arch/powerpc/mm/book3s64/radix_pgtable.c
index c5cc16a..2204d8e 100644 (file)
--- a/arch/powerpc/mm/book3s64/radix_pgtable.c
+++ b/arch/powerpc/mm/book3s64/radix_pgtable.c
@@ -737,8 +737,8 @@ static int __meminit stop_machine_change_mapping(void *data)
 
        spin_unlock(&init_mm.page_table_lock);
        pte_clear(&init_mm, params->aligned_start, params->pte);
-       create_physical_mapping(params->aligned_start, params->start, -1);
-       create_physical_mapping(params->end, params->aligned_end, -1);
+       create_physical_mapping(__pa(params->aligned_start), __pa(params->start), -1);
+       create_physical_mapping(__pa(params->end), __pa(params->aligned_end), -1);
        spin_lock(&init_mm.page_table_lock);
        return 0;
 }