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=-3.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS autolearn=no 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 23D1EC433DB for ; Thu, 18 Mar 2021 11:23:42 +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 69C9E64D9D for ; Thu, 18 Mar 2021 11:23:41 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 69C9E64D9D Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linaro.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:37748 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lMqke-0006WK-8i for qemu-devel@archiver.kernel.org; Thu, 18 Mar 2021 07:23:40 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:42190) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lMqj0-0005eS-To for qemu-devel@nongnu.org; Thu, 18 Mar 2021 07:22:00 -0400 Received: from mail-ej1-x636.google.com ([2a00:1450:4864:20::636]:37424) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1lMqiz-0005gq-67 for qemu-devel@nongnu.org; Thu, 18 Mar 2021 07:21:58 -0400 Received: by mail-ej1-x636.google.com with SMTP id w3so3317968ejc.4 for ; Thu, 18 Mar 2021 04:21:56 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc:content-transfer-encoding; bh=TBmsAe7eB1LNAmL48prbY+P6GemZK7dVs0kkS9eWE7A=; b=GcVVGmMIGdgVOc0oswPBptQuo/vJCiTd19MPsQjn2Mcv1T0S+hBYJoxuTgBJhwvtnL LrxqX2gTVKLZ8XWjZHImP1OyK8t2hdVyS97CCV5EiQZsr0pyk9hzhto3nUUm/YFYDSHD CpHKsCHpkuWwgm1TKw7DwGM3oCcQl65wDDiskPywEcDU/eHFtsiv9VFKo5bd6f1aWlox hieLEZU9RfUUZEz5KMij9/fNz5J+7fczrDRJzrC6u0yxleAP/7JaUb1u4H1l6CdP2fYj xtSY2QjtqXVYFqRR8BtSTkkuHoRv3w9FzsZVjFaNd+EMUk02/q1zIWtmFMywz89yy1wu Gufg== 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:content-transfer-encoding; bh=TBmsAe7eB1LNAmL48prbY+P6GemZK7dVs0kkS9eWE7A=; b=DOyq0OOr2FnKKuU/9eQruBzSfh231zACBctwjzwc8cTf3SxJDAIVDUXHiuAipLTQyS m0wa8XKVJGQqiPvkdGMzxTal+luOBS2QqkPA2v9Gj67k4dC2tg3uVhLhsYJn1OURO+dH LQ75MLVid+zg/oNPArEJRk5r2PBDwNgvbi4UL4xr2BRmgL49oOFbRiEjtDCy1tkHcW5K 4nXn1dpQzjLdphjbtYvnpzkPsFc3rfOiODMhoB/B+cmc6wQuDt9mP6Uw3rdm/WWJ43rm OEm8uOyILMQO55rmWasLe1Df1RY8JHRyM7TtmGmR5AZVReQcrTwkoiY15e0UhRuha5yA 9l2Q== X-Gm-Message-State: AOAM530QYCkDS5VDl4wrYkK8fg5XBGn23rtDys4NRCQAmNuYOAkRoM6B PwcS77WKfpu1jXzySkzXRTP5f5ViBl46UV3vhIGZnA== X-Google-Smtp-Source: ABdhPJxycTeSWeIpXE604Rv7OKOhyPwdB/C0l37cZ9XFoEJPadt8TLt0mFAkArntAiJ+Yjwi+jCN60eEeH/i+uBtyoY= X-Received: by 2002:a17:906:8a65:: with SMTP id hy5mr41270972ejc.250.1616066515310; Thu, 18 Mar 2021 04:21:55 -0700 (PDT) MIME-Version: 1.0 References: <20210221222617.2579610-1-f4bug@amsat.org> <20210221222617.2579610-4-f4bug@amsat.org> <8a302c84-b69c-b0c2-de45-607dd1f686a6@redhat.com> In-Reply-To: From: Peter Maydell Date: Thu, 18 Mar 2021 11:21:31 +0000 Message-ID: Subject: Re: [PATCH v2 3/3] target/arm: Restrict v7A TCG cpus to TCG accel To: =?UTF-8?Q?Philippe_Mathieu=2DDaud=C3=A9?= Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Received-SPF: pass client-ip=2a00:1450:4864:20::636; envelope-from=peter.maydell@linaro.org; helo=mail-ej1-x636.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 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, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable 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: , Cc: Andrew Jones , "Dr. David Alan Gilbert" , QEMU Developers , qemu-arm , Claudio Fontana , =?UTF-8?B?QWxleCBCZW5uw6ll?= Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On Thu, 18 Mar 2021 at 11:09, Philippe Mathieu-Daud=C3=A9 wrote: > Still, I'm not sure it makes sense. If you want to migrate a such > machine, KVM can not virtualize it, so you'll be forced to use TCG > right? In that case cpu_tcg is built in and you have the A15. > > IOW the problem is not this patch, it is that since 82bf7ae84ce we > can not migrate A15. Do you mean "we can't migrate a TCG A15" ? That would be a problem. Or do you mean "we can't migrate a KVM A15" ? That's entirely expected when we drop support for KVM A15 :-) Or do you mean "migration from KVM to TCG doesn't work?" That's a pre-existing thing I don't expect to work (we don't put anything in to stop it working, but I'm pretty sure there will be a bunch of things that mean it doesn't in practice work.) > So we need both 1/ revert 82bf7ae84ce and 2/ be sure the kernel > support 32-bit host... Am I missing something? We're definitely not reverting 82bf7ae84ce if we can avoid it... thanks -- PMM