From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933231AbcKJNOG (ORCPT ); Thu, 10 Nov 2016 08:14:06 -0500 Received: from mail.skyhub.de ([78.46.96.112]:33022 "EHLO mail.skyhub.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932336AbcKJNOD (ORCPT ); Thu, 10 Nov 2016 08:14:03 -0500 Date: Thu, 10 Nov 2016 14:14:00 +0100 From: Borislav Petkov To: Tom Lendacky , Toshi Kani Cc: linux-arch@vger.kernel.org, linux-efi@vger.kernel.org, kvm@vger.kernel.org, linux-doc@vger.kernel.org, x86@kernel.org, linux-kernel@vger.kernel.org, kasan-dev@googlegroups.com, linux-mm@kvack.org, iommu@lists.linux-foundation.org, Rik van Riel , Radim =?utf-8?B?S3LEjW3DocWZ?= , Arnd Bergmann , Jonathan Corbet , Matt Fleming , Joerg Roedel , Konrad Rzeszutek Wilk , Paolo Bonzini , Larry Woodman , Ingo Molnar , Andy Lutomirski , "H. Peter Anvin" , Andrey Ryabinin , Alexander Potapenko , Thomas Gleixner , Dmitry Vyukov Subject: Re: [RFC PATCH v3 02/20] x86: Set the write-protect cache mode for full PAT support Message-ID: <20161110131400.bmeoojsrin2zi2w2@pd.tnic> References: <20161110003426.3280.2999.stgit@tlendack-t1.amdoffice.net> <20161110003448.3280.27573.stgit@tlendack-t1.amdoffice.net> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20161110003448.3280.27573.stgit@tlendack-t1.amdoffice.net> User-Agent: NeoMutt/20161014 (1.7.1) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org + Toshi. On Wed, Nov 09, 2016 at 06:34:48PM -0600, Tom Lendacky wrote: > For processors that support PAT, set the write-protect cache mode > (_PAGE_CACHE_MODE_WP) entry to the actual write-protect value (x05). > > Acked-by: Borislav Petkov > Signed-off-by: Tom Lendacky > --- > arch/x86/mm/pat.c | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-) > > diff --git a/arch/x86/mm/pat.c b/arch/x86/mm/pat.c > index 170cc4f..87e8952 100644 > --- a/arch/x86/mm/pat.c > +++ b/arch/x86/mm/pat.c > @@ -355,7 +355,7 @@ void pat_init(void) > * 010 2 UC-: _PAGE_CACHE_MODE_UC_MINUS > * 011 3 UC : _PAGE_CACHE_MODE_UC > * 100 4 WB : Reserved > - * 101 5 WC : Reserved > + * 101 5 WP : _PAGE_CACHE_MODE_WP > * 110 6 UC-: Reserved > * 111 7 WT : _PAGE_CACHE_MODE_WT > * > @@ -363,7 +363,7 @@ void pat_init(void) > * corresponding types in the presence of PAT errata. > */ > pat = PAT(0, WB) | PAT(1, WC) | PAT(2, UC_MINUS) | PAT(3, UC) | > - PAT(4, WB) | PAT(5, WC) | PAT(6, UC_MINUS) | PAT(7, WT); > + PAT(4, WB) | PAT(5, WP) | PAT(6, UC_MINUS) | PAT(7, WT); > } > > if (!boot_cpu_done) { > > -- Regards/Gruss, Boris. Good mailing practices for 400: avoid top-posting and trim the reply. From mboxrd@z Thu Jan 1 00:00:00 1970 From: Borislav Petkov Subject: Re: [RFC PATCH v3 02/20] x86: Set the write-protect cache mode for full PAT support Date: Thu, 10 Nov 2016 14:14:00 +0100 Message-ID: <20161110131400.bmeoojsrin2zi2w2@pd.tnic> References: <20161110003426.3280.2999.stgit@tlendack-t1.amdoffice.net> <20161110003448.3280.27573.stgit@tlendack-t1.amdoffice.net> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Return-path: Content-Disposition: inline In-Reply-To: <20161110003448.3280.27573.stgit@tlendack-t1.amdoffice.net> Sender: linux-kernel-owner@vger.kernel.org To: Tom Lendacky , Toshi Kani Cc: linux-arch@vger.kernel.org, linux-efi@vger.kernel.org, kvm@vger.kernel.org, linux-doc@vger.kernel.org, x86@kernel.org, linux-kernel@vger.kernel.org, kasan-dev@googlegroups.com, linux-mm@kvack.org, iommu@lists.linux-foundation.org, Rik van Riel , Radim =?utf-8?B?S3LEjW3DocWZ?= , Arnd Bergmann , Jonathan Corbet , Matt Fleming , Joerg Roedel , Konrad Rzeszutek Wilk , Paolo Bonzini , Larry Woodman , Ingo Molnar , Andy Lutomirski , "H. Peter Anvin" , Andrey Ryabinin , Alexander Potapenko List-Id: linux-efi@vger.kernel.org + Toshi. On Wed, Nov 09, 2016 at 06:34:48PM -0600, Tom Lendacky wrote: > For processors that support PAT, set the write-protect cache mode > (_PAGE_CACHE_MODE_WP) entry to the actual write-protect value (x05). > > Acked-by: Borislav Petkov > Signed-off-by: Tom Lendacky > --- > arch/x86/mm/pat.c | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-) > > diff --git a/arch/x86/mm/pat.c b/arch/x86/mm/pat.c > index 170cc4f..87e8952 100644 > --- a/arch/x86/mm/pat.c > +++ b/arch/x86/mm/pat.c > @@ -355,7 +355,7 @@ void pat_init(void) > * 010 2 UC-: _PAGE_CACHE_MODE_UC_MINUS > * 011 3 UC : _PAGE_CACHE_MODE_UC > * 100 4 WB : Reserved > - * 101 5 WC : Reserved > + * 101 5 WP : _PAGE_CACHE_MODE_WP > * 110 6 UC-: Reserved > * 111 7 WT : _PAGE_CACHE_MODE_WT > * > @@ -363,7 +363,7 @@ void pat_init(void) > * corresponding types in the presence of PAT errata. > */ > pat = PAT(0, WB) | PAT(1, WC) | PAT(2, UC_MINUS) | PAT(3, UC) | > - PAT(4, WB) | PAT(5, WC) | PAT(6, UC_MINUS) | PAT(7, WT); > + PAT(4, WB) | PAT(5, WP) | PAT(6, UC_MINUS) | PAT(7, WT); > } > > if (!boot_cpu_done) { > > -- Regards/Gruss, Boris. Good mailing practices for 400: avoid top-posting and trim the reply.