From patchwork Sun Oct 3 16:46:00 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marc Zyngier X-Patchwork-Id: 1535838 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) 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 bilbo.ozlabs.org (Postfix) with ESMTPS id 4HMqXG3FWMz9t5m for ; Mon, 4 Oct 2021 03:47:41 +1100 (AEDT) Received: from localhost ([::1]:53022 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mX4eI-0000qt-Sz for incoming@patchwork.ozlabs.org; Sun, 03 Oct 2021 12:47:38 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:46038) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mX4d2-0000n0-Du for qemu-devel@nongnu.org; Sun, 03 Oct 2021 12:46:21 -0400 Received: from mail.kernel.org ([198.145.29.99]:55604) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mX4cv-00024M-RY for qemu-devel@nongnu.org; Sun, 03 Oct 2021 12:46:17 -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 6F05D61A4F; Sun, 3 Oct 2021 16:46:11 +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 1mX4cr-00EUhe-Eg; Sun, 03 Oct 2021 17:46:09 +0100 From: Marc Zyngier To: qemu-devel@nongnu.org Subject: [PATCH v2 0/5] target/arm: Reduced-IPA space and highmem=off fixes Date: Sun, 3 Oct 2021 17:46:00 +0100 Message-Id: <20211003164605.3116450-1-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+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" Here's another stab at enabling QEMU on systems with pathologically reduced IPA ranges such as the Apple M1 (original version at [1]). Eventually, we're able to run a KVM guest with more than just 3GB of RAM on a system with a 36bit IPA space, and at most 123 vCPUs. This series does a few things: - decouple the enabling of the highmem PCIe region from the highmem attribute - introduce a new attribute to control the enabling of the highmem GICv3 redistributors - correctly cap the PA range with highmem is off - generalise the highmem behaviour to any PA range - disable both highmem PCIe and GICv3 RDs when they are outside of the PA range This has been tested on an M1-based Mac-mini running Linux v5.15-rc3. [1] https://lore.kernel.org/r/20210822144441.1290891-1-maz@kernel.org Marc Zyngier (5): hw/arm/virt: Key enablement of highmem PCIe on highmem_ecam hw/arm/virt: Add a control for the the highmem redistributors hw/arm/virt: Honor highmem setting when computing the memory map hw/arm/virt: Use the PA range to compute the memory map hw/arm/virt: Disable highmem devices that don't fit in the PA range hw/arm/virt-acpi-build.c | 12 ++++----- hw/arm/virt.c | 53 ++++++++++++++++++++++++++++++++++------ include/hw/arm/virt.h | 4 ++- 3 files changed, 54 insertions(+), 15 deletions(-)