From patchwork Sun Aug 22 14:44:38 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marc Zyngier X-Patchwork-Id: 12451553 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=-12.0 required=3.0 tests=BAYES_00,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT 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 16387C4338F for ; Sun, 22 Aug 2021 14:48:47 +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 C71E66125F for ; Sun, 22 Aug 2021 14:48:46 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org C71E66125F Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=nongnu.org Received: from localhost ([::1]:58372 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mHomE-0002OO-0D for qemu-devel@archiver.kernel.org; Sun, 22 Aug 2021 10:48:46 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:54264) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mHoih-0005RB-Rs for qemu-devel@nongnu.org; Sun, 22 Aug 2021 10:45:07 -0400 Received: from mail.kernel.org ([198.145.29.99]:50794) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mHoid-0002Ia-UM for qemu-devel@nongnu.org; Sun, 22 Aug 2021 10:45:07 -0400 Received: from disco-boy.misterjones.org (disco-boy.misterjones.org [51.254.78.96]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 6BEAA61246; Sun, 22 Aug 2021 14:45:01 +0000 (UTC) Received: from sofa.misterjones.org ([185.219.108.64] helo=hot-poop.lan) by disco-boy.misterjones.org with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1mHoiZ-006VES-9H; Sun, 22 Aug 2021 15:44:59 +0100 From: Marc Zyngier To: qemu-devel@nongnu.org Subject: [PATCH 0/3] target/arm: Reduced-IPA space and highmem=off fixes Date: Sun, 22 Aug 2021 15:44:38 +0100 Message-Id: <20210822144441.1290891-1-maz@kernel.org> X-Mailer: git-send-email 2.30.2 MIME-Version: 1.0 X-SA-Exim-Connect-IP: 185.219.108.64 X-SA-Exim-Rcpt-To: qemu-devel@nongnu.org, drjones@redhat.com, eric.auger@redhat.com, peter.maydell@linaro.org, kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org, kernel-team@android.com X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false Received-SPF: pass client-ip=198.145.29.99; envelope-from=maz@kernel.org; helo=mail.kernel.org X-Spam_score_int: -68 X-Spam_score: -6.9 X-Spam_bar: ------ X-Spam_report: (-6.9 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_HI=-5, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham 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: Peter Maydell , Andrew Jones , kvm@vger.kernel.org, Eric Auger , kernel-team@android.com, kvmarm@lists.cs.columbia.edu Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" With the availability of a fruity range of arm64 systems, it becomes obvious that QEMU doesn't deal very well with limited IPA ranges when used as a front-end for KVM. This short series aims at making usable on such systems: - the first patch makes the creation of a scratch VM IPA-limit aware - the second one actually removes the highmem devices from the computed IPA range when highmem=off - the last one addresses an imprecision in the documentation for the highmem option This has been tested on an M1-based Mac-mini running Linux v5.14-rc6. Marc Zyngier (3): hw/arm/virt: KVM: Probe for KVM_CAP_ARM_VM_IPA_SIZE when creating scratch VM hw/arm/virt: Honor highmem setting when computing highest_gpa docs/system/arm/virt: Fix documentation for the 'highmem' option docs/system/arm/virt.rst | 6 +++--- hw/arm/virt.c | 10 +++++++--- target/arm/kvm.c | 7 ++++++- 3 files changed, 16 insertions(+), 7 deletions(-)