From patchwork Tue Oct 4 00:26:26 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Gavin Shan X-Patchwork-Id: 12997904 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 8246AC433FE for ; Tue, 4 Oct 2022 00:42:53 +0000 (UTC) Received: from localhost ([::1]:47602 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1ofW1M-0006Un-IN for qemu-devel@archiver.kernel.org; Mon, 03 Oct 2022 20:42:52 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:47514) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1ofVm8-0008HE-LR for qemu-devel@nongnu.org; Mon, 03 Oct 2022 20:27:08 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:38943) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1ofVm7-0004wq-1B for qemu-devel@nongnu.org; Mon, 03 Oct 2022 20:27:08 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1664843226; 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=9AsOGcv3LZhphPkFGMW7RDSQQeSlyfk9xRX48/WO+SE=; b=SH68dfTB3f9eTvE0CuZ7BHy9grfoiSk8+nupLbD0nUSYG7N08jccWb2XSVNBgOtXGEKFpv jw+kMKJnZMVdCJGF97Th8Xjesv5kGhvpXB/ST3JUHBQXdDBUeXxdSuaJToayLlrMSkGDDx 7D44fuPZvwrmPxR/7eiriJhZR5KkRF4= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-306-4qmv38jMOb6kLY0wIZiYxw-1; Mon, 03 Oct 2022 20:26:56 -0400 X-MC-Unique: 4qmv38jMOb6kLY0wIZiYxw-1 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.rdu2.redhat.com [10.11.54.1]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 96DE2811726; Tue, 4 Oct 2022 00:26:55 +0000 (UTC) Received: from gshan.redhat.com (vpn2-54-56.bne.redhat.com [10.64.54.56]) by smtp.corp.redhat.com (Postfix) with ESMTP id 2F43240C206B; Tue, 4 Oct 2022 00:26:50 +0000 (UTC) From: Gavin Shan To: qemu-arm@nongnu.org Cc: qemu-devel@nongnu.org, maz@kernel.org, eric.auger@redhat.com, cohuck@redhat.com, zhenyzha@redhat.com, richard.henderson@linaro.org, peter.maydell@linaro.org, shan.gavin@gmail.com Subject: [PATCH v4 5/6] hw/arm/virt: Improve high memory region address Date: Tue, 4 Oct 2022 08:26:26 +0800 Message-Id: <20221004002627.59172-6-gshan@redhat.com> In-Reply-To: <20221004002627.59172-1-gshan@redhat.com> References: <20221004002627.59172-1-gshan@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.1 on 10.11.54.1 Received-SPF: pass client-ip=170.10.133.124; envelope-from=gshan@redhat.com; helo=us-smtp-delivery-124.mimecast.com 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, 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: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" There are three high memory regions, which are VIRT_HIGH_REDIST2, VIRT_HIGH_PCIE_ECAM and VIRT_HIGH_PCIE_MMIO. Their base addresses are floating on highest RAM address. However, they can be disabled in several cases. (1) One specific high memory region is disabled by developer by toggling vms->highmem_{redists, ecam, mmio}. (2) VIRT_HIGH_PCIE_ECAM region is disabled on machine, which is 'virt-2.12' or ealier than it. (3) VIRT_HIGH_PCIE_ECAM region is disabled when firmware is loaded on 32-bits system. (4) One specific high memory region is disabled when it breaks the PA space limit. The current implementation of virt_set_memmap() isn't comprehensive because the space for one specific high memory region is always reserved from the PA space for case (1), (2) and (3). In the code, 'base' and 'vms->highest_gpa' are always increased for those three cases. It's unnecessary since the assigned space of the disabled high memory region won't be used afterwards. This improves the address assignment for those three high memory region by skipping the address assignment for one specific high memory region if it has been disabled in case (1), (2) and (3). 'vms->high_compact' is false for now, meaning that we don't have any behavior changes until it becomes configurable through property 'compact-highmem' in next patch. Signed-off-by: Gavin Shan --- hw/arm/virt.c | 19 ++++++++++++------- include/hw/arm/virt.h | 1 + 2 files changed, 13 insertions(+), 7 deletions(-) diff --git a/hw/arm/virt.c b/hw/arm/virt.c index 59de7b78b5..4164da49e9 100644 --- a/hw/arm/virt.c +++ b/hw/arm/virt.c @@ -1715,9 +1715,6 @@ static void virt_set_high_memmap(VirtMachineState *vms, region_base = ROUND_UP(base, extended_memmap[i].size); region_size = extended_memmap[i].size; - vms->memmap[i].base = region_base; - vms->memmap[i].size = region_size; - /* * Check each device to see if they fit in the PA space, * moving highest_gpa as we go. @@ -1725,12 +1722,20 @@ static void virt_set_high_memmap(VirtMachineState *vms, * For each device that doesn't fit, disable it. */ fits = (region_base + region_size) <= BIT_ULL(pa_bits); - if (fits) { + if (*region_enabled && fits) { + vms->memmap[i].base = region_base; + vms->memmap[i].size = region_size; vms->highest_gpa = region_base + region_size - 1; + base = region_base + region_size; + } else { + *region_enabled = false; + if (!vms->highmem_compact) { + base = region_base + region_size; + if (fits) { + vms->highest_gpa = region_base + region_size - 1; + } + } } - - *region_enabled &= fits; - base = region_base + region_size; } } diff --git a/include/hw/arm/virt.h b/include/hw/arm/virt.h index 6ec479ca2b..709f623741 100644 --- a/include/hw/arm/virt.h +++ b/include/hw/arm/virt.h @@ -144,6 +144,7 @@ struct VirtMachineState { PFlashCFI01 *flash[2]; bool secure; bool highmem; + bool highmem_compact; bool highmem_ecam; bool highmem_mmio; bool highmem_redists;