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

Christophe Leroy
2020-02-13T11:36:31Z

Le 13/02/2020 à 01:47, Daniel Axtens a écrit :
> 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