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=-5.9 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS autolearn=unavailable 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 770B2C10DCE for ; Mon, 9 Mar 2020 03:41:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4A9C22064A for ; Mon, 9 Mar 2020 03:41:58 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=sifive.com header.i=@sifive.com header.b="VHknv8LB" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726874AbgCIDlv (ORCPT ); Sun, 8 Mar 2020 23:41:51 -0400 Received: from mail-qt1-f195.google.com ([209.85.160.195]:34889 "EHLO mail-qt1-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726659AbgCIDlv (ORCPT ); Sun, 8 Mar 2020 23:41:51 -0400 Received: by mail-qt1-f195.google.com with SMTP id v15so6083838qto.2 for ; Sun, 08 Mar 2020 20:41:49 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sifive.com; s=google; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=CNYYFTCalmUuSxAWR7XaCM/gxKPhcvr0JtZkj6eTI9Y=; b=VHknv8LB3GFRw23ZbiPdreuz6d01GLWWAJvdX5EgeD9/c/GcOS3IP+ZhkeICb0JhfH XVw67cYfVsHCMH6qw7HsKBL6jpr+j6KBSqMec750uAs+10sQ6riV2cVg2oqfVtKcQHyP Z9hT3Z+Ws38DjPnOB/+jFMRTCz1yayzN6dXEs0YuebKNXz0BN2awgZsy5VV/cWs6MZoZ d94/E5LVYK9fXw1NUB6hQ8fdh3XQZyglH788D+Wk2e0T7MP2IAqDsaAincG5B8kjJe9i NQzh+apsnX9PlOHTG2BZPhAyc6uIbxHgmQJKN3JkWRl0MO23Fvjem4bcygW4f+/zlNW8 V8iw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=CNYYFTCalmUuSxAWR7XaCM/gxKPhcvr0JtZkj6eTI9Y=; b=sgbUrR2T9K5n7br/8ckgEup+SiRxP223bDhj05wf96ua9sXM73/VU+CWcY25XgUQso Uus2SOjyOpVIkWF/3MLbJ2AxBwAemc4j1z6hUw9sI/CPPHPi9eg00Ct8PQiDWb6PJBbu Gav2abB17w7KxSscCm4wvDfYi4uRTZ12seqbUV3rb6A5RNnHY6FyomK5ZZoI6oUEHNs9 4JPfeKLbbuL0lb95en6R2S9y5jSe491+LGuRjw6tlrmo+gB6wt83oxFQrkvi2QErbOkf YlFW51xMT9EVt62O4dynWshMEIUfG9ScL3HJoUZe4R6lCc4IlxHlE1iWpgJHZwCOURC9 /qGQ== X-Gm-Message-State: ANhLgQ1Ol08NvV02OQ9/dCtfjxAvjwrJJ6AvuU02hKE4SkIE4Ks1Gpfu v7sQHtaSFFmn7e+ATxC+QhaN0QMFQRmtcFZyq8sFpA== X-Google-Smtp-Source: ADFU+vt7hRKCpjY9Y/6PbDXX5/P/aKDMHT0L5G/8Gt3a3KMISifEbxYw8sWoZVsjM25ruYRMFoTYggX7kXK+ZNULFqA= X-Received: by 2002:ac8:1345:: with SMTP id f5mr12999290qtj.128.1583725308848; Sun, 08 Mar 2020 20:41:48 -0700 (PDT) MIME-Version: 1.0 References: <20200308094954.13258-1-guoren@kernel.org> In-Reply-To: <20200308094954.13258-1-guoren@kernel.org> From: Greentime Hu Date: Mon, 9 Mar 2020 11:41:37 +0800 Message-ID: Subject: Re: [RFC PATCH V3 00/11] riscv: Add vector ISA support To: guoren@kernel.org Cc: Paul Walmsley , Palmer Dabbelt , Anup.Patel@wdc.com, Linux Kernel Mailing List , linux-arch@vger.kernel.org, arnd@arndb.de, linux-csky@vger.kernel.org, linux-riscv , Guo Ren , Dave Martin , Liu Zhiwei Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sun, Mar 8, 2020 at 5:50 PM wrote: > > From: Guo Ren > > The implementation follow the RISC-V "V" Vector Extension draft v0.8 with > 128bit-vlen and it's based on linux-5.6-rc3 and tested with qemu [1]. > > The patch implement basic context switch, sigcontext save/restore and > ptrace interface with a new regset NT_RISCV_VECTOR. Only fixed 128bit-vlen > is implemented. We need to discuss about vlen-size for libc sigcontext and > ptrace (the maximum size of vlen is unlimited in spec). > > Puzzle: > Dave Martin has talked "Growing CPU register state without breaking ABI" [2] > before, and riscv also met vlen size problem. Let's discuss the common issue > for all architectures and we need a better solution for unlimited vlen. > > Any help are welcomed :) > > 1: https://github.com/romanheros/qemu.git branch:vector-upstream-v3 Hi Guo, Thanks for your patch. It seems the qemu repo doesn't have this branch?