From patchwork Mon Nov 13 15:41:26 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: George Dunlap X-Patchwork-Id: 10056357 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 50D2E60365 for ; Mon, 13 Nov 2017 16:00:41 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 410FE29463 for ; Mon, 13 Nov 2017 16:00:41 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 35CBD29466; Mon, 13 Nov 2017 16:00:41 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.2 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id D4F9D29463 for ; Mon, 13 Nov 2017 16:00:40 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1eEH7v-0001xF-Om; Mon, 13 Nov 2017 15:58:23 +0000 Received: from mail6.bemta6.messagelabs.com ([193.109.254.103]) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1eEH7u-0001w8-VR for xen-devel@lists.xenproject.org; Mon, 13 Nov 2017 15:58:23 +0000 Received: from [193.109.254.147] by server-7.bemta-6.messagelabs.com id 99/97-14955-E11C90A5; Mon, 13 Nov 2017 15:58:22 +0000 X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFprGIsWRWlGSWpSXmKPExsXitHSDva7sQc4 og5mLtSy+b5nM5MDocfjDFZYAxijWzLyk/IoE1ow53ycwFVwWqmhqecvewDidv4uRk0NCwF/i 9I/FjCA2m4CexLzjX1m6GDk4RARUJG7vNehi5OJgFljHJLGs8SMrSI2wgKHE9Uf32EFsFgFVi cVrFoH18grYSey8u4QZYqa8xOLvO9lAbE6g+MUvK5lAbCEBW4kP62ayQ9hAvQ+OskP0CkqcnP mEBcRmFpCQOPjiBfMERt5ZSFKzkKQWMDKtYlQvTi0qSy3StdRLKspMzyjJTczM0TU0MNPLTS0 uTkxPzUlMKtZLzs/dxAgMHQYg2MF4d1PAIUZJDiYlUV6Vz+xRQnxJ+SmVGYnFGfFFpTmpxYcY ZTg4lCR4p+znjBISLEpNT61Iy8wBBjFMWoKDR0mE1wkkzVtckJhbnJkOkTrFaMzxbObrBmaOa Vdbm5iFWPLy81KlxHmzQUoFQEozSvPgBsGi6xKjrJQwLyPQaUI8BalFuZklqPKvGMU5GJWEeW +ATOHJzCuB2/cK6BQmoFOkQL7gLS5JREhJNTDKudq2utT79WT8O9a9IkRRwS235+Y2NnMWoyJ lrf8n3sytu1I5jXHZ2/1H90YU+rZuPTAhd56Y0uZPrS6Xly8IvXfo6oLOv8nnjINCXL9UzA88 qvDcRXR9J8slt5f32zccOqqrkqnoLtNUlNHGpx3qr8Ou88eH33+DZcgaha7MjvWb1zGf11ZiK c5INNRiLipOBAAcbdqAqQIAAA== X-Env-Sender: prvs=483948db6=George.Dunlap@citrix.com X-Msg-Ref: server-15.tower-27.messagelabs.com!1510588699!63420009!2 X-Originating-IP: [66.165.176.63] X-SpamReason: No, hits=0.0 required=7.0 tests=sa_preprocessor: VHJ1c3RlZCBJUDogNjYuMTY1LjE3Ni42MyA9PiAzMDYwNDg=\n, received_headers: No Received headers X-StarScan-Received: X-StarScan-Version: 9.4.45; banners=-,-,- X-VirusChecked: Checked Received: (qmail 9660 invoked from network); 13 Nov 2017 15:58:21 -0000 Received: from smtp02.citrix.com (HELO SMTP02.CITRIX.COM) (66.165.176.63) by server-15.tower-27.messagelabs.com with RC4-SHA encrypted SMTP; 13 Nov 2017 15:58:21 -0000 X-IronPort-AV: E=Sophos;i="5.44,389,1505779200"; d="scan'208";a="459182129" From: George Dunlap To: Date: Mon, 13 Nov 2017 15:41:26 +0000 Message-ID: <20171113154126.13038-16-george.dunlap@citrix.com> X-Mailer: git-send-email 2.15.0 In-Reply-To: <20171113154126.13038-1-george.dunlap@citrix.com> References: <20171113154126.13038-1-george.dunlap@citrix.com> MIME-Version: 1.0 Cc: Stefano Stabellini , Wei Liu , Konrad Wilk , Andrew Cooper , Tim Deegan , George Dunlap , Jan Beulich , Ian Jackson Subject: [Xen-devel] [PATCH 16/16] SUPPORT.md: Add limits RFC X-BeenThere: xen-devel@lists.xen.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xen.org Sender: "Xen-devel" X-Virus-Scanned: ClamAV using ClamSMTP Signed-off-by: George Dunlap --- Could someone take this one over as well? CC: Ian Jackson CC: Wei Liu CC: Andrew Cooper CC: Jan Beulich CC: Stefano Stabellini CC: Konrad Wilk CC: Tim Deegan --- SUPPORT.md | 61 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 61 insertions(+) diff --git a/SUPPORT.md b/SUPPORT.md index e72f9f3892..d11e05fc2a 100644 --- a/SUPPORT.md +++ b/SUPPORT.md @@ -64,6 +64,53 @@ for the definitions of the support status levels etc. Extension to the GICv3 interrupt controller to support MSI. +## Limits/Host + +### CPUs + + Limit, x86: 4095 + Limit, ARM32: 8 + Limit, ARM64: 128 + +Note that for x86, very large number of cpus may not work/boot, +but we will still provide security support + +### x86/RAM + + Limit, x86: 123TiB + Limit, ARM32: 16GiB + Limit, ARM64: 5TiB + +## Limits/Guest + +### Virtual CPUs + + Limit, x86 PV: 8192 + Limit-security, x86 PV: 32 + Limit, x86 HVM: 128 + Limit-security, x86 HVM: 32 + Limit, ARM32: 8 + Limit, ARM64: 128 + +### Virtual RAM + + Limit-security, x86 PV: 2047GiB + Limit-security, x86 HVM: 1.5TiB + Limit, ARM32: 16GiB + Limit, ARM64: 1TiB + +Note that there are no theoretical limits to PV or HVM guest sizes +other than those determined by the processor architecture. + +### Event Channel 2-level ABI + + Limit, 32-bit: 1024 + Limit, 64-bit: 4096 + +### Event Channel FIFO ABI + + Limit: 131072 + ## Guest Type ### x86/PV @@ -685,6 +732,20 @@ If support differs based on implementation (for instance, x86 / ARM, Linux / QEMU / FreeBSD), one line for each set of implementations will be listed. +### Limit-security + +For size limits. +This figure shows the largest configuration which will receive +security support. +It is generally determined by the maximum amount that is regularly tested. +This limit will only be listed explicitly +if it is different than the theoretical limit. + +### Limit + +This figure shows a theoretical size limit. +This does not mean that such a large configuration will actually work. + ## Definition of Status labels Each Status value corresponds to levels of security support,