[PATCH] powerpc64/hw_breakpoints: Handle data breakpoints in radix mode

[Michael Ellerman]

"Naveen N. Rao" <naveen.n.rao at linux.vnet.ibm.com> writes:

> diff --git a/arch/powerpc/kernel/exceptions-64s.S b/arch/powerpc/kernel/exceptions-64s.S
> index ae418b85c17c..17ee701b8336 100644
> --- a/arch/powerpc/kernel/exceptions-64s.S
> +++ b/arch/powerpc/kernel/exceptions-64s.S
> @@ -1442,7 +1440,9 @@ do_hash_page:
>  
>  /* Here we have a page fault that hash_page can't handle. */
>  handle_page_fault:
> -11:	ld	r4,_DAR(r1)
> +	andis.  r0,r4,DSISR_DABRMATCH at h
> +	bne-    handle_dabr_fault

This broke hash. Please test hash! :)

I added:

@@ -1438,11 +1436,16 @@ do_hash_page:
 
        /* Error */
        blt-    13f
+
+       /* Reload DSISR into r4 for the DABR check below */
+       ld      r4,_DSISR(r1)
 #endif /* CONFIG_PPC_STD_MMU_64 */
 
 /* Here we have a page fault that hash_page can't handle. */
 handle_page_fault:


cheers