linux-kernel - Re: [RFC/PATCH v2 02/10] x86

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Message-id: <5411325A.5010308@samsung.com>
Date:	Thu, 11 Sep 2014 09:25:46 +0400
From:	Andrey Ryabinin <a.ryabinin@...sung.com>
To:	Andi Kleen <andi@...stfloor.org>, "H. Peter Anvin" <hpa@...or.com>
Cc:	Sasha Levin <sasha.levin@...cle.com>,
	Dave Hansen <dave.hansen@...el.com>,
	Andrey Ryabinin <ryabinin.a.a@...il.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Dmitry Vyukov <dvyukov@...gle.com>,
	Konstantin Serebryany <kcc@...gle.com>,
	Dmitry Chernenkov <dmitryc@...gle.com>,
	Andrey Konovalov <adech.fo@...il.com>,
	Yuri Gribov <tetra2005@...il.com>,
	Konstantin Khlebnikov <koct9i@...il.com>,
	Christoph Lameter <cl@...ux.com>,
	Joonsoo Kim <iamjoonsoo.kim@....com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Vegard Nossum <vegard.nossum@...il.com>,
	"x86@...nel.org" <x86@...nel.org>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>
Subject: Re: [RFC/PATCH v2 02/10] x86_64: add KASan support

On 09/11/2014 08:46 AM, Andi Kleen wrote:
> On Wed, Sep 10, 2014 at 09:33:11PM -0700, H. Peter Anvin wrote:
>> On 09/10/2014 09:29 PM, Sasha Levin wrote:
>>> On 09/11/2014 12:26 AM, H. Peter Anvin wrote:
>>>> Except you just broke PVop kernels.
>>>
>>> So is this why v2 refuses to boot on my KVM guest? (was digging
>>> into that before I send a mail out).
>>>
>>
>> No, KVM should be fine.  It is Xen PV which ends up as a smoldering crater.
> 
> Just exclude it in Kconfig? I assume PV will eventually go away anyways.
> 
> -Andi
> 

That's done already in this patch:

--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -135,6 +135,7 @@ config X86
 	select HAVE_ACPI_APEI if ACPI
 	select HAVE_ACPI_APEI_NMI if ACPI
 	select ACPI_LEGACY_TABLES_LOOKUP if ACPI
+	select HAVE_ARCH_KASAN if X86_64 && !XEN

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