From patchwork Tue Jan 12 18:50:06 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xiao Guangrong X-Patchwork-Id: 8020251 Return-Path: X-Original-To: patchwork-kvm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 618539F1CC for ; Tue, 12 Jan 2016 18:57:35 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 94D6620412 for ; Tue, 12 Jan 2016 18:57:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9A80E20416 for ; Tue, 12 Jan 2016 18:57:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1763483AbcALS52 (ORCPT ); Tue, 12 Jan 2016 13:57:28 -0500 Received: from mga14.intel.com ([192.55.52.115]:19771 "EHLO mga14.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1763455AbcALS51 (ORCPT ); Tue, 12 Jan 2016 13:57:27 -0500 Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by fmsmga103.fm.intel.com with ESMTP; 12 Jan 2016 10:57:27 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.22,558,1449561600"; d="scan'208";a="891764477" Received: from xiaoreal1.sh.intel.com (HELO xiaoreal1.sh.intel.com.sh.intel.com) ([10.239.48.79]) by fmsmga002.fm.intel.com with ESMTP; 12 Jan 2016 10:57:24 -0800 From: Xiao Guangrong To: pbonzini@redhat.com, imammedo@redhat.com Cc: gleb@kernel.org, mtosatti@redhat.com, stefanha@redhat.com, mst@redhat.com, rth@twiddle.net, ehabkost@redhat.com, dan.j.williams@intel.com, kvm@vger.kernel.org, qemu-devel@nongnu.org, Xiao Guangrong Subject: [PATCH v2 07/11] nvdimm acpi: introduce patched dsm memory Date: Wed, 13 Jan 2016 02:50:06 +0800 Message-Id: <1452624610-46945-8-git-send-email-guangrong.xiao@linux.intel.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1452624610-46945-1-git-send-email-guangrong.xiao@linux.intel.com> References: <1452624610-46945-1-git-send-email-guangrong.xiao@linux.intel.com> Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The dsm memory is used to save the input parameters and store the dsm result which is filled by QEMU. The address of dsm memory is decided by bios and patched into int32 object named "MEMA" Signed-off-by: Xiao Guangrong --- hw/acpi/nvdimm.c | 34 +++++++++++++++++++++++++++++++++- 1 file changed, 33 insertions(+), 1 deletion(-) diff --git a/hw/acpi/nvdimm.c b/hw/acpi/nvdimm.c index 256cedd..e7acc98 100644 --- a/hw/acpi/nvdimm.c +++ b/hw/acpi/nvdimm.c @@ -28,6 +28,7 @@ #include "hw/acpi/acpi.h" #include "hw/acpi/aml-build.h" +#include "hw/acpi/bios-linker-loader.h" #include "hw/nvram/fw_cfg.h" #include "hw/mem/nvdimm.h" @@ -405,6 +406,7 @@ void nvdimm_init_acpi_state(AcpiNVDIMMState *state, MemoryRegion *io, } #define NVDIMM_COMMON_DSM "NCAL" +#define NVDIMM_ACPI_MEM_ADDR "MEMA" static void nvdimm_build_common_dsm(Aml *dev) { @@ -469,7 +471,9 @@ static void nvdimm_build_nvdimm_devices(GSList *device_list, Aml *root_dev) static void nvdimm_build_ssdt(GSList *device_list, GArray *table_offsets, GArray *table_data, GArray *linker) { - Aml *ssdt, *sb_scope, *dev; + Aml *ssdt, *sb_scope, *dev, *mem_addr; + uint32_t zero_offset = 0; + int offset; acpi_add_table(table_offsets, table_data); @@ -500,9 +504,37 @@ static void nvdimm_build_ssdt(GSList *device_list, GArray *table_offsets, aml_append(sb_scope, dev); + /* + * leave it at the end of ssdt so that we can conveniently get the + * offset of int32 object which will be patched with the real address + * of the dsm memory by BIOS. + * + * 0x32000000 is the magic number to let aml_int() create int32 object. + * It will be zeroed later to make bios_linker_loader_add_pointer() + * happy. + */ + mem_addr = aml_name_decl(NVDIMM_ACPI_MEM_ADDR, aml_int(0x32000000)); + + aml_append(sb_scope, mem_addr); aml_append(ssdt, sb_scope); /* copy AML table into ACPI tables blob and patch header there */ g_array_append_vals(table_data, ssdt->buf->data, ssdt->buf->len); + + offset = table_data->len - 4; + + /* + * zero the last 4 bytes, i.e, it is the offset of + * NVDIMM_ACPI_MEM_ADDR object. + */ + g_array_remove_range(table_data, offset, 4); + g_array_append_vals(table_data, &zero_offset, 4); + + bios_linker_loader_alloc(linker, NVDIMM_DSM_MEM_FILE, TARGET_PAGE_SIZE, + false /* high memory */); + bios_linker_loader_add_pointer(linker, ACPI_BUILD_TABLE_FILE, + NVDIMM_DSM_MEM_FILE, table_data, + table_data->data + offset, + sizeof(uint32_t)); build_header(linker, table_data, (void *)(table_data->data + table_data->len - ssdt->buf->len), "SSDT", ssdt->buf->len, 1, "NVDIMM");