From patchwork Thu Aug 26 17:34:50 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Paraschiv, Andra-Irina" X-Patchwork-Id: 12460367 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=-19.5 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT 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 1E64EC432BE for ; Thu, 26 Aug 2021 17:35:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 088A66109F for ; Thu, 26 Aug 2021 17:35:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232086AbhHZRgU (ORCPT ); Thu, 26 Aug 2021 13:36:20 -0400 Received: from smtp-fw-9102.amazon.com ([207.171.184.29]:47455 "EHLO smtp-fw-9102.amazon.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S243191AbhHZRgS (ORCPT ); Thu, 26 Aug 2021 13:36:18 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amazon.com; i=@amazon.com; q=dns/txt; s=amazon201209; t=1629999331; x=1661535331; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=jZKS2leLLiICe6MhvYhlq+VBXWbGj69GCZ6/vDcyL7E=; b=K4fsjKzZEu4WqqZHnzBo6/911Db7IMCZHfAEexSisrXN0v4j2QN2mgQk SIpYUf636zCMTiBon8YdGVs7HIZPxnoZStvsp3DNh8PextsgWHO5UpMkD wC4WVzWpNABHQDUio+6zSROKDqldSTBwgk3Sg3QVOuub8w9yn78kGrTGE E=; X-IronPort-AV: E=Sophos;i="5.84,354,1620691200"; d="scan'208";a="155388453" Received: from pdx4-co-svc-p1-lb2-vlan3.amazon.com (HELO email-inbound-relay-1d-5dd976cd.us-east-1.amazon.com) ([10.25.36.214]) by smtp-border-fw-9102.sea19.amazon.com with ESMTP; 26 Aug 2021 17:35:23 +0000 Received: from EX13D16EUB003.ant.amazon.com (iad12-ws-svc-p26-lb9-vlan2.iad.amazon.com [10.40.163.34]) by email-inbound-relay-1d-5dd976cd.us-east-1.amazon.com (Postfix) with ESMTPS id F3D18A1D6A; Thu, 26 Aug 2021 17:35:20 +0000 (UTC) Received: from 38f9d34ed3b1.ant.amazon.com (10.43.161.175) by EX13D16EUB003.ant.amazon.com (10.43.166.99) with Microsoft SMTP Server (TLS) id 15.0.1497.23; Thu, 26 Aug 2021 17:35:14 +0000 From: Andra Paraschiv To: linux-kernel CC: Alexandru Ciobotaru , Greg KH , Kamal Mostafa , "Alexandru Vasile" , Paolo Bonzini , "Stefano Garzarella" , Stefan Hajnoczi , Vitaly Kuznetsov , kvm , ne-devel-upstream , Andra Paraschiv Subject: [PATCH v1 2/3] nitro_enclaves: Update documentation for Arm support Date: Thu, 26 Aug 2021 20:34:50 +0300 Message-ID: <20210826173451.93165-3-andraprs@amazon.com> X-Mailer: git-send-email 2.20.1 (Apple Git-117) In-Reply-To: <20210826173451.93165-1-andraprs@amazon.com> References: <20210826173451.93165-1-andraprs@amazon.com> MIME-Version: 1.0 X-Originating-IP: [10.43.161.175] X-ClientProxiedBy: EX13D38UWC004.ant.amazon.com (10.43.162.204) To EX13D16EUB003.ant.amazon.com (10.43.166.99) Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Add references for hugepages and booting steps for Arm. Signed-off-by: Andra Paraschiv --- Documentation/virt/ne_overview.rst | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/Documentation/virt/ne_overview.rst b/Documentation/virt/ne_overview.rst index 39b0c8fe2654a..2777da1fb0ad1 100644 --- a/Documentation/virt/ne_overview.rst +++ b/Documentation/virt/ne_overview.rst @@ -43,8 +43,8 @@ for the enclave VM. An enclave does not have persistent storage attached. The memory regions carved out of the primary VM and given to an enclave need to be aligned 2 MiB / 1 GiB physically contiguous memory regions (or multiple of this size e.g. 8 MiB). The memory can be allocated e.g. by using hugetlbfs from -user space [2][3]. The memory size for an enclave needs to be at least 64 MiB. -The enclave memory and CPUs need to be from the same NUMA node. +user space [2][3][7]. The memory size for an enclave needs to be at least +64 MiB. The enclave memory and CPUs need to be from the same NUMA node. An enclave runs on dedicated cores. CPU 0 and its CPU siblings need to remain available for the primary VM. A CPU pool has to be set for NE purposes by an @@ -61,7 +61,7 @@ device is placed in memory below the typical 4 GiB. The application that runs in the enclave needs to be packaged in an enclave image together with the OS ( e.g. kernel, ramdisk, init ) that will run in the enclave VM. The enclave VM has its own kernel and follows the standard Linux -boot protocol [6]. +boot protocol [6][8]. The kernel bzImage, the kernel command line, the ramdisk(s) are part of the Enclave Image Format (EIF); plus an EIF header including metadata such as magic @@ -93,3 +93,5 @@ enclave process can exit. [4] https://www.kernel.org/doc/html/latest/admin-guide/kernel-parameters.html [5] https://man7.org/linux/man-pages/man7/vsock.7.html [6] https://www.kernel.org/doc/html/latest/x86/boot.html +[7] https://www.kernel.org/doc/html/latest/arm64/hugetlbpage.html +[8] https://www.kernel.org/doc/html/latest/arm64/booting.html