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=-15.1 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_SANE_1 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 4729FC433EF for ; Tue, 21 Sep 2021 07:26:09 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id C8672611C5 for ; Tue, 21 Sep 2021 07:26:08 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org C8672611C5 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=xen0n.name Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=nongnu.org Received: from localhost ([::1]:51254 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mSaAJ-000239-OQ for qemu-devel@archiver.kernel.org; Tue, 21 Sep 2021 03:26:07 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:57532) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mSa8W-0000o4-6r for qemu-devel@nongnu.org; Tue, 21 Sep 2021 03:24:16 -0400 Received: from [115.28.160.31] (port=48666 helo=mailbox.box.xen0n.name) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mSa8S-0002tX-CE for qemu-devel@nongnu.org; Tue, 21 Sep 2021 03:24:15 -0400 Received: from [192.168.9.172] (unknown [101.88.29.172]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits)) (No client certificate requested) by mailbox.box.xen0n.name (Postfix) with ESMTPSA id 1CDEC600FF; Tue, 21 Sep 2021 15:24:05 +0800 (CST) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=xen0n.name; s=mail; t=1632209045; bh=N90pVo201oxKtkFdp3gOx2Axe1tBIYKE12VeDXgiU9c=; h=Date:Subject:To:References:From:In-Reply-To:From; b=v+KC9i6xZPSirR6UBxmuQWne2D+Oj87hU9w7dTTngU4fSOaWj+MreNxs2myQXA4JL HOeY1bCBYHYmJqLF4lkbrnJqrh21jp3Tnw3CmJmfAY6iF5YWMBfh3GM1+NWJnqmpXK ZQ+J8CDIb9BEq7w5KY2CxwpPnACFMiP3iFvqdvBI= Message-ID: Date: Tue, 21 Sep 2021 15:24:04 +0800 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:94.0) Gecko/20100101 Thunderbird/94.0a1 Subject: Re: [PATCH 28/30] configure, meson.build: Mark support for 64-bit LoongArch hosts Content-Language: en-US To: =?UTF-8?Q?Philippe_Mathieu-Daud=c3=a9?= , Richard Henderson , qemu-devel@nongnu.org References: <20210920080451.408655-1-git@xen0n.name> <20210920080451.408655-29-git@xen0n.name> <1361ef78-1ac4-8d64-2897-3e3b5c7ef3bd@amsat.org> From: WANG Xuerui In-Reply-To: <1361ef78-1ac4-8d64-2897-3e3b5c7ef3bd@amsat.org> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-Host-Lookup-Failed: Reverse DNS lookup failed for 115.28.160.31 (failed) Received-SPF: pass client-ip=115.28.160.31; envelope-from=i.qemu@xen0n.name; helo=mailbox.box.xen0n.name X-Spam_score_int: -12 X-Spam_score: -1.3 X-Spam_bar: - X-Spam_report: (-1.3 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, NICE_REPLY_A=-0.001, RDNS_NONE=0.793, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Hi Philippe, On 9/21/21 14:59, Philippe Mathieu-Daudé wrote: > On 9/21/21 08:02, WANG Xuerui wrote: >> On 9/21/21 01:23, Richard Henderson wrote: >>> On 9/20/21 1:04 AM, WANG Xuerui wrote: >>>> Signed-off-by: WANG Xuerui >>>> --- >>>>   configure   | 4 +++- >>>>   meson.build | 4 +++- >>>>   2 files changed, 6 insertions(+), 2 deletions(-) > >>> If there's no loongarch32, and never will be, then there's probably >>> no point in keeping the '64' suffix. >> >> The loongarch32 tuple will most certainly come into existence some >> time in the future, but probably bare-metal-only and without a Linux >> port AFAIK. That's a point the Loongson people and I didn't >> communicate well, apologizes for that. (While we're at it, the >> reserved "loongarchx32" which is x32/n32-like, most likely will never >> exist.) > > Are you trying to beat MIPS at their ABI complexity? /s Hah, I'm not Loongson employee so maybe I'm not in the best position to answer this ;-) But from an outsider's perspective, the Loongson people obviously reserved things upfront like a multi-millionaire, then suddenly realized they only have ~500 people on board, developers even less; so they did the Right Thing(TM), only later, to drop x32 altogether and focus their energy on bare-metal use cases for their 32-bit-only chips. Plus, LoongArch is strictly little-endian, and only one baseline ISA revision is published so far, so IMO it can never beat MIPS in terms of combinatorial ABI possibilities. Maybe RISC-V have a chance? ;-)