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

[Christophe Leroy]

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