From mboxrd@z Thu Jan 1 00:00:00 1970 Received: by 2002:a19:711a:0:0:0:0:0 with SMTP id m26csp2188539lfc; Mon, 25 May 2020 09:38:05 -0700 (PDT) X-Google-Smtp-Source: ABdhPJxOw9tDsblwooSisHNZFpyXkuCO2RFBUyZJaaKtLBDbTFhB5aLn9kbStkpIA7Vn5V01cnPa X-Received: by 2002:a25:d153:: with SMTP id i80mr27737211ybg.330.1590424685453; Mon, 25 May 2020 09:38:05 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1590424685; cv=none; d=google.com; s=arc-20160816; b=ktgytsnHk6bMHTMOvMsLluKMiBYF4fp8smu6UJ5lWeVdOebNeYtwiGn7lk3yT+zhHm 22gmkNTScmYYVyyqd5fNcIj4AtEMeI0YzMvPMan2VFjzuQ7jKjc+s5uiH5i7tBlzF/DZ J8vMQ4XekNHlmPDOETP6f43HepclLnTO7TrU7BxEywYi4mQpnRc4ByFhx0ansoJXLtQJ A12D8MbojHHGFfL3AKBPBFQjugyK5HnprSLYCr2Z+WNR/jy1+Nqaclz5+GvYCplQm58a VDEat/XSd/PcYqpwtajTLt6YkU/7I+AMferd/9JXhgTwMX+qkn0QQ6merPY4sfJt54S+ QccQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=sender:errors-to:cc:list-subscribe:list-help:list-post:list-archive :list-unsubscribe:list-id:precedence:content-transfer-encoding :mime-version:references:in-reply-to:message-id:subject:to:from:date :dkim-signature; bh=VqC0owlCJ9rBHLzzUT39QT98qwVwgHZMF3KZE+p89NI=; b=hT8MY7rA36Ty7jUpNV5rgCVxx9BrWQ3Q40YExp6hATMnqZubWj+m2gcYKfSZOfM9dW rtW8d27ECN0eRRpTtss56ExzpOjeC+89BBymU9mPEcTybVxsS7Bx9EdCC0l0tSHRkaFl 4pOc22wNob+UXNQGCpnbTgFKPa4F0kutkx2kyIFc0bYm6C/wAHCnHJfWqK8EmVAzUv9v TMQMzZgM1ls6RV+GLy8UgqsGX+dAb3BFDKqR1/ExdyjxnzxRMxHRRZZJib1o0Efp8JZD ThYD0Yz6KGGfcUG/HRgmgLzfqYZn7vUqeKczSnkQVEBlOtiep/2rrEsWKvXEwD+C+7bw YdoA== ARC-Authentication-Results: i=1; mx.google.com; dkim=fail header.i=@redhat.com header.s=mimecast20190719 header.b=B6SMd8yM; spf=pass (google.com: domain of qemu-devel-bounces+alex.bennee=linaro.org@nongnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom="qemu-devel-bounces+alex.bennee=linaro.org@nongnu.org"; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=redhat.com Return-Path: Received: from lists.gnu.org (lists.gnu.org. [209.51.188.17]) by mx.google.com with ESMTPS id h81si16105758ybc.149.2020.05.25.09.38.05 for (version=TLS1_2 cipher=ECDHE-ECDSA-CHACHA20-POLY1305 bits=256/256); Mon, 25 May 2020 09:38:05 -0700 (PDT) Received-SPF: pass (google.com: domain of qemu-devel-bounces+alex.bennee=linaro.org@nongnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; Authentication-Results: mx.google.com; dkim=fail header.i=@redhat.com header.s=mimecast20190719 header.b=B6SMd8yM; spf=pass (google.com: domain of qemu-devel-bounces+alex.bennee=linaro.org@nongnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom="qemu-devel-bounces+alex.bennee=linaro.org@nongnu.org"; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=redhat.com Received: from localhost ([::1]:59550 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jdG72-00028G-TN for alex.bennee@linaro.org; Mon, 25 May 2020 12:38:04 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:35248) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jdG5d-00013I-CL for qemu-devel@nongnu.org; Mon, 25 May 2020 12:36:37 -0400 Received: from us-smtp-delivery-1.mimecast.com ([207.211.31.120]:30187 helo=us-smtp-1.mimecast.com) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1jdG5c-0008Q2-4z for qemu-devel@nongnu.org; Mon, 25 May 2020 12:36:36 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1590424594; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=VqC0owlCJ9rBHLzzUT39QT98qwVwgHZMF3KZE+p89NI=; b=B6SMd8yMnkN4Q7Y1UGpP84IOvWyIDzpDPjsha1rawNrLi1gum4zZKvvq7aJSFvji1w2rdp c2kf73IcKBn7PK280cm5ladJZhtkNmFDJct9rTN/jIbfrmMYAN+QSMpbjuxVIHId4mZxZL WjyBj7MsApt7YwkJaZxrqEPKJYfLWWM= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-433-FcqzBKVwOOCuLhVebfRshQ-1; Mon, 25 May 2020 12:36:31 -0400 X-MC-Unique: FcqzBKVwOOCuLhVebfRshQ-1 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 23BF6107ACCD; Mon, 25 May 2020 16:36:30 +0000 (UTC) Received: from localhost (unknown [10.40.208.12]) by smtp.corp.redhat.com (Postfix) with ESMTP id B89855D9C5; Mon, 25 May 2020 16:36:17 +0000 (UTC) Date: Mon, 25 May 2020 18:36:15 +0200 From: Igor Mammedov To: Gerd Hoffmann Subject: Re: [PATCH v3 14/22] microvm: use 2G split unconditionally Message-ID: <20200525183615.5f8e67d3@redhat.com> In-Reply-To: <20200525114508.hhvyzjiqja6knz6l@sirius.home.kraxel.org> References: <20200520132003.9492-1-kraxel@redhat.com> <20200520132003.9492-15-kraxel@redhat.com> <20200521112921.641f12bb@redhat.com> <20200525114508.hhvyzjiqja6knz6l@sirius.home.kraxel.org> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Received-SPF: pass client-ip=207.211.31.120; envelope-from=imammedo@redhat.com; helo=us-smtp-1.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/05/25 08:28:26 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] 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, DKIMWL_WL_HIGH=0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_PASS=-0.001 autolearn=_AUTOLEARN 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: Peter Maydell , Eduardo Habkost , Sergio Lopez , "Michael S. Tsirkin" , qemu-devel@nongnu.org, Shannon Zhao , qemu-arm@nongnu.org, Paolo Bonzini , Richard Henderson Errors-To: qemu-devel-bounces+alex.bennee=linaro.org@nongnu.org Sender: "Qemu-devel" X-TUID: s+KkUvRH2Gjb On Mon, 25 May 2020 13:45:08 +0200 Gerd Hoffmann wrote: > On Thu, May 21, 2020 at 11:29:21AM +0200, Igor Mammedov wrote: > > On Wed, 20 May 2020 15:19:55 +0200 > > Gerd Hoffmann wrote: > > > > > Looks like the logiv was copied over from q35. > > > > > > q35 does this for backward compatibility, there is no reason to do this > > > on microvm though. So split @ 2G unconditionally. > > > > not related to your ACPI rework, but just an idea for future of microvm > > > > I wonder if we should carry over all this fixed RAM layout legacy from pc/q35 > > with a bunch of knobs to tweak it (along with complicated logic). > > Well, I think we can (should) drop max-ram-below-4g too. There is > no reason to use that with microvm, other that shooting yourself into > the foot (by making mmio overlap with ram). > > With that being gone too there isn't much logic left ... I wonder if we need 2G split for microvm at all? Can we map 1 contiguous big blob from 0 GPA and overlay bios & other x86 TOLUD stuff? > take care, > Gerd >