From nobody Thu Nov 6 21:08:52 2025 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=linux.intel.com Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1543498052857707.5097908430137; Thu, 29 Nov 2018 05:27:32 -0800 (PST) Received: from localhost ([::1]:54139 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gSMLr-0001ZD-62 for importer@patchew.org; Thu, 29 Nov 2018 08:27:31 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:58675) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gSMJo-0000Fu-1M for qemu-devel@nongnu.org; Thu, 29 Nov 2018 08:25:25 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1gSMJj-0001oG-Ga for qemu-devel@nongnu.org; Thu, 29 Nov 2018 08:25:23 -0500 Received: from mga03.intel.com ([134.134.136.65]:30951) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1gSMJj-0001hj-6S; Thu, 29 Nov 2018 08:25:19 -0500 Received: from fmsmga008.fm.intel.com ([10.253.24.58]) by orsmga103.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 29 Nov 2018 05:25:16 -0800 Received: from hharjula-mobl.ger.corp.intel.com (HELO localhost.localdomain) ([10.252.29.114]) by fmsmga008.fm.intel.com with ESMTP; 29 Nov 2018 05:25:10 -0800 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.56,294,1539673200"; d="scan'208";a="97547186" From: Samuel Ortiz To: qemu-devel@nongnu.org Date: Thu, 29 Nov 2018 14:24:22 +0100 Message-Id: <20181129132428.333-3-sameo@linux.intel.com> X-Mailer: git-send-email 2.19.2 In-Reply-To: <20181129132428.333-1-sameo@linux.intel.com> References: <20181129132428.333-1-sameo@linux.intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 134.134.136.65 Subject: [Qemu-devel] [PATCH v2 2/8] hw: arm: acpi: Fix incorrect checksums in RSDP X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Laurent Vivier , Peter Maydell , Thomas Huth , Eduardo Habkost , Ben Warren , "Michael S. Tsirkin" , Ard Biesheuvel , Shannon Zhao , qemu-arm@nongnu.org, Igor Mammedov , Paolo Bonzini , Richard Henderson Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" Content-Type: text/plain; charset="utf-8" From: Igor Mammedov When RSDP table was introduced (d4bec5d87), we calculated only legacy checksum, and that was incorrect as it - specified rev=3D2 and forgot about extended checksum. - legacy checksum calculated on full table instead of the 1st 20 bytes Fix it by adding extended checksum calculation and using correct size for legacy checksum. While at it use explicit constants to specify sub/full tables sizes instead of relying on AcpiRsdpDescriptor size and fields offsets. The follow up commits will convert this table to build_append_int_noprefix(= ) API, will use constants anyway and remove unused AcpiRsdpDescriptor structure. Based on "[PATCH v5 05/24] hw: acpi: Implement XSDT support for RSDP" by Samuel Ortiz, who did it right in his impl. Fixes: d4bec5d87 (hw/arm/virt-acpi-build: Generate RSDP table) Signed-off-by: Igor Mammedov CC: Ard Biesheuvel CC: Shannon Zhao Reviewed-by: Samuel Ortiz Signed-off-by: Samuel Ortiz Reviewed-by: Andrew Jones --- hw/arm/virt-acpi-build.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/hw/arm/virt-acpi-build.c b/hw/arm/virt-acpi-build.c index fcaa350892..0835900052 100644 --- a/hw/arm/virt-acpi-build.c +++ b/hw/arm/virt-acpi-build.c @@ -390,8 +390,13 @@ build_rsdp(GArray *rsdp_table, BIOSLinker *linker, uns= igned xsdt_tbl_offset) =20 /* Checksum to be filled by Guest linker */ bios_linker_loader_add_checksum(linker, ACPI_BUILD_RSDP_FILE, - (char *)rsdp - rsdp_table->data, sizeof *rsdp, + (char *)rsdp - rsdp_table->data, 20 /* ACPI rev 1.0 RSDP size */, (char *)&rsdp->checksum - rsdp_table->data); + + /* Extended checksum to be filled by Guest linker */ + bios_linker_loader_add_checksum(linker, ACPI_BUILD_RSDP_FILE, + (char *)rsdp - rsdp_table->data, 36 /* ACPI rev 2.0 RSDP size */, + (char *)&rsdp->extended_checksum - rsdp_table->data); } =20 static void --=20 2.19.2