From patchwork Mon Jul 11 13:45:11 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xiao Guangrong X-Patchwork-Id: 646948 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [IPv6:2001:4830:134:3::11]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 3rp6Hf6SQpz9s9N for ; Tue, 12 Jul 2016 00:02:54 +1000 (AEST) Received: from localhost ([::1]:33865 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bMbnQ-0003h1-SB for incoming@patchwork.ozlabs.org; Mon, 11 Jul 2016 10:02:52 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:50854) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bMbhk-0005Gb-0L for qemu-devel@nongnu.org; Mon, 11 Jul 2016 09:57:00 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1bMbhd-0006Uf-Bf for qemu-devel@nongnu.org; Mon, 11 Jul 2016 09:56:59 -0400 Received: from mga02.intel.com ([134.134.136.20]:30874) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bMbhd-0006US-5W for qemu-devel@nongnu.org; Mon, 11 Jul 2016 09:56:53 -0400 Received: from orsmga002.jf.intel.com ([10.7.209.21]) by orsmga101.jf.intel.com with ESMTP; 11 Jul 2016 06:56:52 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos; i="5.28,346,1464678000"; d="scan'208"; a="1014571946" Received: from xiaoreal1.sh.intel.com (HELO xiaoreal1.sh.intel.com.sh.intel.com) ([10.239.48.133]) by orsmga002.jf.intel.com with ESMTP; 11 Jul 2016 06:56:51 -0700 From: Xiao Guangrong To: pbonzini@redhat.com, imammedo@redhat.com Date: Mon, 11 Jul 2016 21:45:11 +0800 Message-Id: <1468244718-3731-2-git-send-email-guangrong.xiao@linux.intel.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1468244718-3731-1-git-send-email-guangrong.xiao@linux.intel.com> References: <1468244718-3731-1-git-send-email-guangrong.xiao@linux.intel.com> X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 134.134.136.20 Subject: [Qemu-devel] [PATCH 1/8] acpi nvdimm: fix wrong buffer size returned by DSM method 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: Xiao Guangrong , ehabkost@redhat.com, kvm@vger.kernel.org, mst@redhat.com, gleb@kernel.org, mtosatti@redhat.com, qemu-devel@nongnu.org, stefanha@redhat.com, dan.j.williams@intel.com, rth@twiddle.net Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" Currently, 'RLEN' is the totally buffer size written by QEMU and it is ACPI internally used only. The buffer size returned to guest should not include 'RLEN' itself Signed-off-by: Xiao Guangrong --- hw/acpi/nvdimm.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/hw/acpi/nvdimm.c b/hw/acpi/nvdimm.c index e486128..5454c0f 100644 --- a/hw/acpi/nvdimm.c +++ b/hw/acpi/nvdimm.c @@ -863,6 +863,8 @@ static void nvdimm_build_common_dsm(Aml *dev) result_size = aml_local(1); aml_append(method, aml_store(aml_name("RLEN"), result_size)); + /* RLEN is not included in the payload returned to guest. */ + aml_append(method, aml_subtract(result_size, aml_int(4), result_size)); aml_append(method, aml_store(aml_shiftleft(result_size, aml_int(3)), result_size)); aml_append(method, aml_create_field(aml_name("ODAT"), aml_int(0),