From patchwork Fri Jan 14 14:07:38 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marc Zyngier X-Patchwork-Id: 12713688 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 7350AC433F5 for ; Fri, 14 Jan 2022 14:32:33 +0000 (UTC) Received: from localhost ([::1]:36262 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1n8Nd2-0007d4-IT for qemu-devel@archiver.kernel.org; Fri, 14 Jan 2022 09:32:32 -0500 Received: from eggs.gnu.org ([209.51.188.92]:47986) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1n8NFY-0006if-Co for qemu-devel@nongnu.org; Fri, 14 Jan 2022 09:08:16 -0500 Received: from [2604:1380:4641:c500::1] (port=45840 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 1n8NFV-0002pO-Pf for qemu-devel@nongnu.org; Fri, 14 Jan 2022 09:08:15 -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 AA51C61C7A; Fri, 14 Jan 2022 14:08:05 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 17A00C36AEF; Fri, 14 Jan 2022 14:08:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1642169285; bh=nAblTk6IMLqx5QlaZTT3XwmgPRTylGTb8UUfnkLW9S8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=nmLLmF7g6b3bmG9mVpYoGxv3DQZXs99KYqXN1LZPtgkYkCdBy4J9LjTrARHX/ckmS pzglD1YgV406lpRMltInTPK0+g6n0ORZRoGArps3XjHF77DznIe0NtYUxGBu+9C99q UInDn12rX3AvUj/TRicDmWv+Us2huu2Rw/bVob1GuNviccjWfQwkzR68dxt5n94Jo5 9kmGBxNAAbeiD3cj7n6kaarADfx8sqUj0zkUJywIg8GibH3+CFmtETO/WuWzXN+q3r vQZr6kFxAOjWIX4XKgFrIFRXzQAOzPwbemnaS1QrtS5B4Z9AIH2JKhmac12QZ9qvYu P/NQJBGZj6yhA== 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 1n8NFL-000V8K-9z; Fri, 14 Jan 2022 14:08:03 +0000 From: Marc Zyngier To: qemu-devel@nongnu.org Subject: [PATCH v5 3/6] hw/arm/virt: Honor highmem setting when computing the memory map Date: Fri, 14 Jan 2022 14:07:38 +0000 Message-Id: <20220114140741.1358263-4-maz@kernel.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220114140741.1358263-1-maz@kernel.org> References: <20220114140741.1358263-1-maz@kernel.org> 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: -68 X-Spam_score: -6.9 X-Spam_bar: ------ X-Spam_report: (-6.9 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.595, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_HI=-5, RDNS_NONE=0.793, 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: 2.1.29 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" Even when the VM is configured with highmem=off, the highest_gpa field includes devices that are above the 4GiB limit. Similarily, nothing seem to check that the memory is within the limit set by the highmem=off option. This leads to failures in virt_kvm_type() on systems that have a crippled IPA range, as the reported IPA space is larger than what it should be. Instead, honor the user-specified limit to only use the devices at the lowest end of the spectrum, and fail if we have memory crossing the 4GiB limit. Reviewed-by: Andrew Jones Reviewed-by: Eric Auger Signed-off-by: Marc Zyngier --- hw/arm/virt.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff --git a/hw/arm/virt.c b/hw/arm/virt.c index e734a75850..ecc3e3e5b0 100644 --- a/hw/arm/virt.c +++ b/hw/arm/virt.c @@ -1663,7 +1663,7 @@ static uint64_t virt_cpu_mp_affinity(VirtMachineState *vms, int idx) static void virt_set_memmap(VirtMachineState *vms) { MachineState *ms = MACHINE(vms); - hwaddr base, device_memory_base, device_memory_size; + hwaddr base, device_memory_base, device_memory_size, memtop; int i; vms->memmap = extended_memmap; @@ -1690,7 +1690,11 @@ static void virt_set_memmap(VirtMachineState *vms) device_memory_size = ms->maxram_size - ms->ram_size + ms->ram_slots * GiB; /* Base address of the high IO region */ - base = device_memory_base + ROUND_UP(device_memory_size, GiB); + memtop = base = device_memory_base + ROUND_UP(device_memory_size, GiB); + if (!vms->highmem && memtop > 4 * GiB) { + error_report("highmem=off, but memory crosses the 4GiB limit\n"); + exit(EXIT_FAILURE); + } if (base < device_memory_base) { error_report("maxmem/slots too huge"); exit(EXIT_FAILURE); @@ -1707,7 +1711,7 @@ static void virt_set_memmap(VirtMachineState *vms) vms->memmap[i].size = size; base += size; } - vms->highest_gpa = base - 1; + vms->highest_gpa = (vms->highmem ? base : memtop) - 1; if (device_memory_size > 0) { ms->device_memory = g_malloc0(sizeof(*ms->device_memory)); ms->device_memory->base = device_memory_base;