From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-oi0-f69.google.com (mail-oi0-f69.google.com [209.85.218.69]) by kanga.kvack.org (Postfix) with ESMTP id F1D686B0033 for ; Thu, 22 Mar 2018 12:02:10 -0400 (EDT) Received: by mail-oi0-f69.google.com with SMTP id 129-v6so4723475oid.12 for ; Thu, 22 Mar 2018 09:02:10 -0700 (PDT) Received: from foss.arm.com (foss.arm.com. [217.140.101.70]) by mx.google.com with ESMTP id v12-v6si2027136oth.407.2018.03.22.09.02.09 for ; Thu, 22 Mar 2018 09:02:09 -0700 (PDT) From: Punit Agrawal 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> MIME-Version: 1.0 Content-Type: text/plain Sender: owner-linux-mm@kvack.org List-ID: 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 "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 [...]