From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.5 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_MUTT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7508DC04AAC for ; Mon, 20 May 2019 11:36:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4957A20656 for ; Mon, 20 May 2019 11:36:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730344AbfETLgt (ORCPT ); Mon, 20 May 2019 07:36:49 -0400 Received: from mga05.intel.com ([192.55.52.43]:25764 "EHLO mga05.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727626AbfETLgs (ORCPT ); Mon, 20 May 2019 07:36:48 -0400 X-Amp-Result: UNKNOWN X-Amp-Original-Verdict: FILE UNKNOWN X-Amp-File-Uploaded: False Received: from orsmga006.jf.intel.com ([10.7.209.51]) by fmsmga105.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 20 May 2019 04:36:47 -0700 X-ExtLoop1: 1 Received: from mhauser-mobl.ger.corp.intel.com (HELO localhost) ([10.252.47.244]) by orsmga006.jf.intel.com with ESMTP; 20 May 2019 04:36:32 -0700 Date: Mon, 20 May 2019 14:36:31 +0300 From: Jarkko Sakkinen To: Sean Christopherson Cc: Andy Lutomirski , James Morris , "Serge E. Hallyn" , LSM List , Paul Moore , Stephen Smalley , Eric Paris , selinux@vger.kernel.org, Jethro Beekman , "Xing, Cedric" , "Hansen, Dave" , Thomas Gleixner , "Dr. Greg" , Linus Torvalds , LKML , X86 ML , "linux-sgx@vger.kernel.org" , Andrew Morton , "nhorman@redhat.com" , "npmccallum@redhat.com" , "Ayoun, Serge" , "Katz-zamir, Shay" , "Huang, Haitao" , Andy Shevchenko , "Svahn, Kai" , Borislav Petkov , Josh Triplett , "Huang, Kai" , David Rientjes Subject: Re: SGX vs LSM (Re: [PATCH v20 00/28] Intel SGX1 support) Message-ID: <20190520113631.GC27805@linux.intel.com> References: <6da269d8-7ebb-4177-b6a7-50cc5b435cf4@fortanix.com> <20190513102926.GD8743@linux.intel.com> <20190514104323.GA7591@linux.intel.com> <20190514204527.GC1977@linux.intel.com> <20190515013031.GF1977@linux.intel.com> <20190517000331.GD11204@linux.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190517000331.GD11204@linux.intel.com> Organization: Intel Finland Oy - BIC 0357606-4 - Westendinkatu 7, 02160 Espoo User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-sgx-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-sgx@vger.kernel.org On Thu, May 16, 2019 at 05:03:31PM -0700, Sean Christopherson wrote: > The SGX ioctl() would need to take mmap_sem for write, but we can mitigate > that issue by changing the ioctl() to take a range of memory instead of a > single page. That'd also provide "EADD batching" that folks have > requested. This should be easy enough to add as the EADD operations are already batched internally to a worker thread. /Jarkko