From patchwork Mon Dec 27 21:16:37 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marc Zyngier X-Patchwork-Id: 12700046 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org 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 smtp.lore.kernel.org (Postfix) with ESMTPS id 35D49C433EF for ; Mon, 27 Dec 2021 21:21:21 +0000 (UTC) Received: from localhost ([::1]:50534 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1n1xQh-0003Gf-32 for qemu-devel@archiver.kernel.org; Mon, 27 Dec 2021 16:21:16 -0500 Received: from eggs.gnu.org ([209.51.188.92]:51658) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1n1xMj-0005I2-C4 for qemu-devel@nongnu.org; Mon, 27 Dec 2021 16:17:09 -0500 Received: from [2604:1380:4641:c500::1] (port=35422 helo=dfw.source.kernel.org) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1n1xMh-0002WV-52 for qemu-devel@nongnu.org; Mon, 27 Dec 2021 16:17:08 -0500 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id AEA3161073; Mon, 27 Dec 2021 21:17:05 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 229E9C36AEA; Mon, 27 Dec 2021 21:17:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1640639825; bh=iVCmmeeO13JoomogqvcGNrgq4nDJ+FZNDPXN9KsDdHw=; h=From:To:Cc:Subject:Date:From; b=alQ3nfWkYPPngjyPmoIaTwKsZk/INt338gLXMlUHNVbYetsfpmNrq1bZH1zoJ/Z95 7/2GRDPAt8PSk1PRuLI0u0m2KXvTkgguVSCosihvZ83HpC2838ZPwe1zI7OfdYKvvA VuBdzPLkIaE392EqljeOdh5XDP6eNNa3Po2Sey1NwnpUMN2woMYBr1HzVX0sDNKgIu gw1GT8V8eDlzppzrllvlDAjWMXdqqJ1Et5K1MuDdPBT424Wo83pJkEu8TK2O75oXk6 A+EMBHnhRNgerydZDa+85HmLuK3AZgpqvpBtFoSQPQdtGOPKbrPp5l+WWYLhHnHXUZ wHFKEuIdyKERw== Received: from cfbb000407.r.cam.camfibre.uk ([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 1n1xMd-00Ed4b-6N; Mon, 27 Dec 2021 21:17:03 +0000 From: Marc Zyngier To: qemu-devel@nongnu.org Subject: [PATCH v3 0/5] target/arm: Reduced-IPA space and highmem=off fixes Date: Mon, 27 Dec 2021 21:16:37 +0000 Message-Id: <20211227211642.994461-1-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 X-Host-Lookup-Failed: Reverse DNS lookup failed for 2604:1380:4641:c500::1 (failed) Received-SPF: pass client-ip=2604:1380:4641:c500::1; envelope-from=maz@kernel.org; helo=dfw.source.kernel.org X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.575, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, 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: 2.1.29 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" Here's another stab at enabling QEMU on systems with pathologically reduced IPA ranges such as the Apple M1 (previous 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 v5.16-rc6 with both KVM and TCG. * From v2: - Fixed checking of the maximum memory against the IPA space - Fixed TCG memory map creation - Rebased on top of QEMU's 89f3bfa326 - Collected Andrew's RBs, with thanks [1] https://lore.kernel.org/r/20211003164605.3116450-1-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 | 67 ++++++++++++++++++++++++++++++++++------ include/hw/arm/virt.h | 4 ++- 3 files changed, 67 insertions(+), 16 deletions(-)