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Thu, 13 Feb 2020 12:36:29 +0100 (CET) X-Virus-Scanned: amavisd-new at c-s.fr Received: from messagerie.si.c-s.fr ([127.0.0.1]) by localhost (messagerie.si.c-s.fr [127.0.0.1]) (amavisd-new, port 10023) with ESMTP id AepsZRA2KoQk; Thu, 13 Feb 2020 12:36:29 +0100 (CET) Received: from [192.168.4.90] (unknown [192.168.4.90]) by messagerie.si.c-s.fr (Postfix) with ESMTP id 6797F8B83F; Thu, 13 Feb 2020 12:36:28 +0100 (CET) Subject: Re: [PATCH v7 4/4] powerpc: Book3S 64-bit "heavyweight" KASAN support To: Daniel Axtens , linux-kernel@vger.kernel.org, linux-mm@kvack.org, linuxppc-dev@lists.ozlabs.org, kasan-dev@googlegroups.com, aneesh.kumar@linux.ibm.com, bsingharora@gmail.com Cc: Michael Ellerman References: <20200213004752.11019-1-dja@axtens.net> <20200213004752.11019-5-dja@axtens.net> From: Christophe Leroy Message-ID: Date: Thu, 13 Feb 2020 12:36:28 +0100 User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:68.0) Gecko/20100101 Thunderbird/68.5.0 MIME-Version: 1.0 In-Reply-To: <20200213004752.11019-5-dja@axtens.net> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: fr Content-Transfer-Encoding: quoted-printable X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Le 13/02/2020 =C3=A0 01:47, Daniel Axtens a =C3=A9crit=C2=A0: > 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=20 when selecting that (I mean giving the exact amount of memory and with=20 restrictions like having a wholeblock memory), should it also depend of=20 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