From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pj1-x102e.google.com (mail-pj1-x102e.google.com [IPv6:2607:f8b0:4864:20::102e]) by sourceware.org (Postfix) with ESMTPS id 8C18B3858D28 for ; Fri, 31 Mar 2023 21:35:39 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org 8C18B3858D28 Authentication-Results: sourceware.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: sourceware.org; spf=pass smtp.mailfrom=gmail.com Received: by mail-pj1-x102e.google.com with SMTP id c4so5811510pjs.4 for ; Fri, 31 Mar 2023 14:35:39 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; t=1680298538; x=1682890538; h=content-transfer-encoding:in-reply-to:from:references:cc:to :content-language:subject:user-agent:mime-version:date:message-id :from:to:cc:subject:date:message-id:reply-to; bh=F4tCXByPCNOAGcgwCs9W6EZk0zFMnJ+Xvtz5SUzDVnU=; b=cVlePxWJC0yAKg8z1DQ3skWeUA/Sf+5McAmcgR8r9KCVRZHvD0YK6hBN3JNu1H7643 u0tzi3n0hmI3JG4KwFLOCB2Wps70Db9Uy5m4XOrasL8vnv2vUnc22Ve2e1jPse8A+WhB YNsWVejXH7dcq/GWnDGWQ5EtnPUDXsf57Gb6S5vQK/ZQ2pYmNGna9poTNPHeR9PCPqvu +vb8DUmElVj48hDIhiDYpUmoUsHLrCiGETHjGWLZXXBwKcd7E2SaXI3B3gu62qJbLvmK +sDSxjzx/PDtFlA697E7ast1f2FjqpxG4PW40X0PgsU6Mdi1VdytfJ24Oe8m+srW8F4W HYLw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; t=1680298538; x=1682890538; h=content-transfer-encoding:in-reply-to:from:references:cc:to :content-language:subject:user-agent:mime-version:date:message-id :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=F4tCXByPCNOAGcgwCs9W6EZk0zFMnJ+Xvtz5SUzDVnU=; b=MBnFSE1hfG7klIZnqb75OSZ/dm0/0HXS7B9g2sijf+R9pkj6U7MaS6bmiLSfvj1w6O 7K3k/1bw9cPncOwIdtgYmJ6QMlz3+kuq4aBAv+r+AZIZTbWFPCcog7dhLoOd3w1Nhy/1 XRtvlkDGt+39SHYT637J3YtHG+PqmNFLe4gLK2Ux4J1EeNZ4ZlJP/Bhf+tKKOp5MmVEV r+H74OsSw/1S0IYnmAAv3K3UgUl76uY/i+Fe4Tp7WR2v1Vp8iLTokMyN+tYVcM1pOZ21 mXeP/MUCYdsVPeRmT3phAPDstQ1TdnZ6mQhmDBCfboe5Jbi/VKWXbRH7e/7oDs77cJls w7eQ== X-Gm-Message-State: AAQBX9fBEzwwD4refaLkQ1SEyuTKoxhwICcmTSW4jGMIEhBZG73nsY/9 Y2JxQIZJQa82GnlEz0uPCyyqmffeNm8= X-Google-Smtp-Source: AKy350auAjp4h7naaOgawjMA5XJgQLPlXvo7B7NoD4iJFFPCaEs6v3t35/ArVoj1b5mt5hYsFXY+Kg== X-Received: by 2002:a17:90b:4c12:b0:234:1a60:a6b0 with SMTP id na18-20020a17090b4c1200b002341a60a6b0mr32843004pjb.34.1680298538536; Fri, 31 Mar 2023 14:35:38 -0700 (PDT) Received: from ?IPV6:2601:681:8600:13d0::f0a? ([2601:681:8600:13d0::f0a]) by smtp.gmail.com with ESMTPSA id 21-20020a170902c21500b00199193e5ea1sm2017481pll.61.2023.03.31.14.35.37 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 31 Mar 2023 14:35:37 -0700 (PDT) Message-ID: Date: Fri, 31 Mar 2023 15:35:36 -0600 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.9.0 Subject: Re: [PATCH v2 0/3] RISC-V: ifunced memcpy using new kernel hwprobe interface Content-Language: en-US To: Palmer Dabbelt Cc: adhemerval.zanella@linaro.org, Evan Green , libc-alpha@sourceware.org, slewis@rivosinc.com, Vineet Gupta References: From: Jeff Law In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Status: No, score=-2.3 required=5.0 tests=BAYES_00,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FREEMAIL_FROM,NICE_REPLY_A,RCVD_IN_DNSWL_NONE,SPF_HELO_NONE,SPF_PASS,TXREP autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org List-Id: On 3/31/23 15:03, Palmer Dabbelt wrote: > On Fri, 31 Mar 2023 13:19:19 PDT (-0700), jeffreyalaw@gmail.com wrote: > > [just snipping the rest so we can focus on Jeff's ask, the other stuff > is interesting but a longer reply and we'd probably want to fork the > thread anyway...] > >> So perhaps we can narrow down the scope right now even further.  Can we >> agree to try and settle on a base implementation with no ISA extensions >> and no uarch variants?  ISTM if we can settle on those implementations >> that it should be usable immediately by the RV community at large and >> doesn't depend on the kernel->glibc interface work. > > That base includes V and ZBB?  In that case we'd be dropping support for > all existing hardware, which I would be very much against. No, it would not include V or ZBB. It would be something that could work on any risc-v hardware. Sorry if I wasn't clear about that. jeff