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=-2.4 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,USER_AGENT_SANE_1 autolearn=no 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 6E1FEC43603 for ; Wed, 18 Dec 2019 16:18:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 38BFA227BF for ; Wed, 18 Dec 2019 16:18:29 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=alien8.de header.i=@alien8.de header.b="mB6F5CRI" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727337AbfLRQS3 (ORCPT ); Wed, 18 Dec 2019 11:18:29 -0500 Received: from mail.skyhub.de ([5.9.137.197]:43134 "EHLO mail.skyhub.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726955AbfLRQS2 (ORCPT ); Wed, 18 Dec 2019 11:18:28 -0500 Received: from zn.tnic (p200300EC2F0B8B009D1D67E59157F47A.dip0.t-ipconnect.de [IPv6:2003:ec:2f0b:8b00:9d1d:67e5:9157:f47a]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.skyhub.de (SuperMail on ZX Spectrum 128k) with ESMTPSA id 640811EC05B0; Wed, 18 Dec 2019 17:18:27 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=alien8.de; s=dkim; t=1576685907; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:in-reply-to:in-reply-to: references:references; bh=mYgMkr+bARNjL6EZJiJMKopGv36OxLWLBBdhBNmcynU=; b=mB6F5CRI3SPwmtL9swsspuLi/U1OMA8fOzm10p2XewVSTpv6+f1wTPhPrtzbQQ1sZFdPoH 7vNT/CCa4IuLTlJoxWFTaMdR78PXSQO+ccx/x4lFkxHrjvHyD+khwE+6mrK43Hjf0lTFTI QdR8UTJ+AGBCLT2fehDS6SoQb8JGg7M= Date: Wed, 18 Dec 2019 17:18:21 +0100 From: Borislav Petkov To: Sean Christopherson Cc: Jarkko Sakkinen , linux-kernel@vger.kernel.org, x86@kernel.org, linux-sgx@vger.kernel.org, akpm@linux-foundation.org, dave.hansen@intel.com, nhorman@redhat.com, npmccallum@redhat.com, serge.ayoun@intel.com, shay.katz-zamir@intel.com, haitao.huang@intel.com, andriy.shevchenko@linux.intel.com, tglx@linutronix.de, kai.svahn@intel.com, josh@joshtriplett.org, luto@kernel.org, kai.huang@intel.com, rientjes@google.com, cedric.xing@intel.com, puiterwijk@redhat.com Subject: Re: [PATCH v24 08/24] x86/sgx: Enumerate and track EPC sections Message-ID: <20191218161821.GG24886@zn.tnic> References: <20191129231326.18076-1-jarkko.sakkinen@linux.intel.com> <20191129231326.18076-9-jarkko.sakkinen@linux.intel.com> <20191218091856.GA24886@zn.tnic> <20191218151944.GA25201@linux.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20191218151944.GA25201@linux.intel.com> 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 Wed, Dec 18, 2019 at 07:19:44AM -0800, Sean Christopherson wrote: > Yes, EPC pages are architecturally defined to be 4k sized and aligned. > > 36.5 Enclave Page Cache > > The EPC is divided into EPC pages. An EPC page is 4KB in size and always > aligned on a 4KB boundary. Aha, thx! -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette