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: 566691 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 6930514032F for ; Wed, 13 Jan 2016 06:04:11 +1100 (AEDT) Received: from localhost ([::1]:33762 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aJ4Ej-00077e-7e for incoming@patchwork.ozlabs.org; Tue, 12 Jan 2016 14:04:09 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:43919) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aJ48G-0002Xv-Fw for qemu-devel@nongnu.org; Tue, 12 Jan 2016 13:57:29 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1aJ48F-0003gB-FP for qemu-devel@nongnu.org; Tue, 12 Jan 2016 13:57:28 -0500 Received: from mga11.intel.com ([192.55.52.93]:39851) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aJ48F-0003ZX-A1 for qemu-devel@nongnu.org; Tue, 12 Jan 2016 13:57:27 -0500 Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by fmsmga102.fm.intel.com with ESMTP; 12 Jan 2016 10:57:26 -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 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> X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 192.55.52.93 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 Subject: [Qemu-devel] [PATCH v2 07/11] nvdimm acpi: introduce patched dsm memory X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org 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");