From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pf0-f178.google.com (mail-pf0-f178.google.com [209.85.192.178]) by kanga.kvack.org (Postfix) with ESMTP id 10A0D6B0253 for ; Mon, 7 Mar 2016 14:19:56 -0500 (EST) Received: by mail-pf0-f178.google.com with SMTP id x188so60901969pfb.2 for ; Mon, 07 Mar 2016 11:19:56 -0800 (PST) Received: from shards.monkeyblade.net (shards.monkeyblade.net. [2001:4f8:3:36:211:85ff:fe63:a549]) by mx.google.com with ESMTP id x6si6512276pas.72.2016.03.07.11.19.55 for ; Mon, 07 Mar 2016 11:19:55 -0800 (PST) Date: Mon, 07 Mar 2016 14:19:50 -0500 (EST) Message-Id: <20160307.141950.2225098078054843052.davem@davemloft.net> Subject: Re: [PATCH v2] sparc64: Add support for Application Data Integrity (ADI) From: David Miller In-Reply-To: References: <56DDC6E0.4000907@oracle.com> Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: luto@amacapital.net Cc: khalid.aziz@oracle.com, corbet@lwn.net, akpm@linux-foundation.org, dingel@linux.vnet.ibm.com, bob.picco@oracle.com, kirill.shutemov@linux.intel.com, aneesh.kumar@linux.vnet.ibm.com, aarcange@redhat.com, arnd@arndb.de, sparclinux@vger.kernel.org, rob.gardner@oracle.com, mhocko@suse.cz, chris.hyser@oracle.com, richard@nod.at, vbabka@suse.cz, koct9i@gmail.com, oleg@redhat.com, gthelen@google.com, jack@suse.cz, xiexiuqi@huawei.com, Vineet.Gupta1@synopsys.com, luto@kernel.org, ebiederm@xmission.com, bsegall@google.com, geert@linux-m68k.org, dave@stgolabs.net, adobriyan@gmail.com, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-arch@vger.kernel.org, linux-api@vger.kernel.org From: Andy Lutomirski Date: Mon, 7 Mar 2016 10:49:57 -0800 > What data structure or structures changes when this stxa instruction happens? An internal table, maintained by the CPU and/or hypervisor, and if in physical addresses then in a region which is only accessible by the hypervisor. The table is not accessible by the kernel at all via loads or stores. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org