From patchwork Thu Mar 4 10:55:54 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Hildenbrand X-Patchwork-Id: 12115877 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=-13.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham 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 4138AC433E0 for ; Thu, 4 Mar 2021 11:02:55 +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 9E8D464E67 for ; Thu, 4 Mar 2021 11:02:54 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 9E8D464E67 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:52962 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lHlkr-0007Dm-Ca for qemu-devel@archiver.kernel.org; Thu, 04 Mar 2021 06:02:53 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:58288) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lHleV-00015t-Nm for qemu-devel@nongnu.org; Thu, 04 Mar 2021 05:56:19 -0500 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:53333) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1lHleT-00033L-Vu for qemu-devel@nongnu.org; Thu, 04 Mar 2021 05:56:19 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1614855377; 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=5SOwtyN3Zbc4Z927SH0l0jz+6PoxQQXJFaiIPfeFKOQ=; b=BXMbpzvjzbNI5GpjhFYcmNS+WY4MWlNOSDC2iXoKnFOQu33ds13QX/c1Nonr6ef5R46VoR 5Yha9S+/nb1Tany1/seAA3E3GN64Sv6C54wJtBdyMvbQthwqNahEaDJVZXtD3sLxlNxapo cOJ2ocFAMwBNZ1E4IpMkJSv9lFQwKyo= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-235-ei-ldS5NOou_OcrXB0wmLg-1; Thu, 04 Mar 2021 05:56:15 -0500 X-MC-Unique: ei-ldS5NOou_OcrXB0wmLg-1 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 0241D80432E; Thu, 4 Mar 2021 10:56:14 +0000 (UTC) Received: from t480s.redhat.com (ovpn-113-171.ams2.redhat.com [10.36.113.171]) by smtp.corp.redhat.com (Postfix) with ESMTP id A632F5D720; Thu, 4 Mar 2021 10:56:11 +0000 (UTC) From: David Hildenbrand To: qemu-devel@nongnu.org Subject: [PATCH v3 4/4] acpi: Set proper maximum size for "etc/acpi/rsdp" blob Date: Thu, 4 Mar 2021 11:55:54 +0100 Message-Id: <20210304105554.121674-5-david@redhat.com> In-Reply-To: <20210304105554.121674-1-david@redhat.com> References: <20210304105554.121674-1-david@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=david@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=216.205.24.124; envelope-from=david@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 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_LOW=-0.7, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, 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 , "Michael S. Tsirkin" , David Hildenbrand , Richard Henderson , Alistair Francis , Shannon Zhao , qemu-arm@nongnu.org, Igor Mammedov , Paolo Bonzini , Laszlo Ersek Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Let's also set a maximum size for "etc/acpi/rsdp", so the maximum size doesn't get implicitly set based on the initial table size. In my experiments, the table size was in the range of 22 bytes, so a single page (== what we used until now) seems to be good enough. Now that we have defined maximum sizes for all currently used table types, let's assert that we catch usage with new tables that need a proper maximum size definition. Also assert that our initial size does not exceed the maximum size; while qemu_ram_alloc_internal() properly asserts that the initial RAMBlock size is <= its maximum size, the result might differ when the host page size is bigger than 4k. Suggested-by: Laszlo Ersek Cc: Alistair Francis Cc: Paolo Bonzini Cc: "Michael S. Tsirkin" Cc: Igor Mammedov Cc: Peter Maydell Cc: Shannon Zhao Cc: Marcel Apfelbaum Cc: Paolo Bonzini Cc: Richard Henderson Cc: Laszlo Ersek Signed-off-by: David Hildenbrand --- hw/acpi/utils.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/hw/acpi/utils.c b/hw/acpi/utils.c index f2d69a6d92..0c486ea29f 100644 --- a/hw/acpi/utils.c +++ b/hw/acpi/utils.c @@ -29,14 +29,19 @@ MemoryRegion *acpi_add_rom_blob(FWCfgCallback update, void *opaque, GArray *blob, const char *name) { - uint64_t max_size = 0; + uint64_t max_size; /* Reserve RAM space for tables: add another order of magnitude. */ if (!strcmp(name, ACPI_BUILD_TABLE_FILE)) { max_size = 0x200000; } else if (!strcmp(name, ACPI_BUILD_LOADER_FILE)) { max_size = 0x10000; + } else if (!strcmp(name, ACPI_BUILD_RSDP_FILE)) { + max_size = 0x1000; + } else { + g_assert_not_reached(); } + g_assert(acpi_data_len(blob) <= max_size); return rom_add_blob(name, blob->data, acpi_data_len(blob), max_size, -1, name, update, opaque, NULL, true);