Re: [PATCH v7 4/4] powerpc: Book3S 64-bit "heavyweight" KASAN support

[Christophe Leroy]

Le 13/02/2020 Ã 01:47, Daniel Axtens a ÃcritÂ:
> diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
> index 497b7d0b2d7e..f1c54c08a88e 100644
> --- a/arch/powerpc/Kconfig
> +++ b/arch/powerpc/Kconfig
> @@ -169,7 +169,9 @@ config PPC
>   	select HAVE_ARCH_HUGE_VMAP		if PPC_BOOK3S_64 && PPC_RADIX_MMU
>   	select HAVE_ARCH_JUMP_LABEL
>   	select HAVE_ARCH_KASAN			if PPC32
> +	select HAVE_ARCH_KASAN			if PPC_BOOK3S_64 && PPC_RADIX_MMU

That's probably detail, but as it is necessary to deeply define the HW 
when selecting that (I mean giving the exact amount of memory and with 
restrictions like having a wholeblock memory), should it also depend of 
EXPERT ?

>   	select HAVE_ARCH_KASAN_VMALLOC		if PPC32
> +	select HAVE_ARCH_KASAN_VMALLOC		if PPC_BOOK3S_64 && PPC_RADIX_MMU

Maybe we could have

-  	select HAVE_ARCH_KASAN_VMALLOC		if PPC32
+	select HAVE_ARCH_KASAN_VMALLOC		if HAVE_ARCH_KASAN


>   	select HAVE_ARCH_KGDB
>   	select HAVE_ARCH_MMAP_RND_BITS
>   	select HAVE_ARCH_MMAP_RND_COMPAT_BITS	if COMPAT


Christophe