From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751734AbeCVQCM (ORCPT ); Thu, 22 Mar 2018 12:02:12 -0400 Received: from foss.arm.com ([217.140.101.70]:39552 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750992AbeCVQCJ (ORCPT ); Thu, 22 Mar 2018 12:02:09 -0400 From: Punit Agrawal To: "Kirill A. Shutemov" Cc: Ingo Molnar , x86@kernel.org, Thomas Gleixner , "H. Peter Anvin" , Tom Lendacky , Dave Hansen , Kai Huang , linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: Re: [RFC, PATCH 08/22] mm: Introduce __GFP_ENCRYPT References: <20180305162610.37510-1-kirill.shutemov@linux.intel.com> <20180305162610.37510-9-kirill.shutemov@linux.intel.com> Date: Thu, 22 Mar 2018 16:02:06 +0000 In-Reply-To: <20180305162610.37510-9-kirill.shutemov@linux.intel.com> (Kirill A. Shutemov's message of "Mon, 5 Mar 2018 19:25:56 +0300") Message-ID: <87sh8s14ld.fsf@e105922-lin.cambridge.arm.com> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/25.2 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org "Kirill A. Shutemov" writes: > The patch adds new gfp flag to indicate that we're allocating encrypted > page. > > Architectural code may need to do special preparation for encrypted > pages such as flushing cache to avoid aliasing. > > Signed-off-by: Kirill A. Shutemov > --- > include/linux/gfp.h | 12 ++++++++++++ > include/linux/mm.h | 2 ++ > include/trace/events/mmflags.h | 1 + > mm/Kconfig | 3 +++ > mm/page_alloc.c | 3 +++ > tools/perf/builtin-kmem.c | 1 + > 6 files changed, 22 insertions(+) > > diff --git a/include/linux/gfp.h b/include/linux/gfp.h > index 1a4582b44d32..43a93ca11c3c 100644 > --- a/include/linux/gfp.h > +++ b/include/linux/gfp.h > @@ -24,6 +24,11 @@ struct vm_area_struct; > #define ___GFP_HIGH 0x20u > #define ___GFP_IO 0x40u > #define ___GFP_FS 0x80u > +#ifdef CONFIG_ARCH_WANTS_GFP_ENCRYPT > +#define ___GFP_ENCYPT 0x100u > +#else > +#define ___GFP_ENCYPT 0 s/___GFP_ENCYPT/___GFP_ENCRYPT? Thanks, Punit [...]