From patchwork Fri Aug 12 06:54:06 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xiao Guangrong X-Patchwork-Id: 9276509 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 23E81600CB for ; Fri, 12 Aug 2016 07:09:00 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 0894E288CB for ; Fri, 12 Aug 2016 07:09:00 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id EDA07288D0; Fri, 12 Aug 2016 07:08:59 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 5F251288CB for ; Fri, 12 Aug 2016 07:08:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751598AbcHLHIv (ORCPT ); Fri, 12 Aug 2016 03:08:51 -0400 Received: from mga14.intel.com ([192.55.52.115]:63576 "EHLO mga14.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751396AbcHLHIs (ORCPT ); Fri, 12 Aug 2016 03:08:48 -0400 Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by fmsmga103.fm.intel.com with ESMTP; 12 Aug 2016 00:07:30 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.28,509,1464678000"; d="scan'208";a="154662658" Received: from xiaoreal1.sh.intel.com (HELO xiaoreal1.sh.intel.com.sh.intel.com) ([10.239.48.133]) by fmsmga004.fm.intel.com with ESMTP; 12 Aug 2016 00:07:17 -0700 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 4/8] nvdimm acpi: implement Read FIT function Date: Fri, 12 Aug 2016 14:54:06 +0800 Message-Id: <1470984850-66891-5-git-send-email-guangrong.xiao@linux.intel.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1470984850-66891-1-git-send-email-guangrong.xiao@linux.intel.com> References: <1470984850-66891-1-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-Virus-Scanned: ClamAV using ClamSMTP Read FIT whose function index is 0xFFFFFFFF is reserved by QEMU to read the piece of FIT buffer. Please refer to docs/specs/acpi_nvdimm.txt for detailed info Signed-off-by: Xiao Guangrong --- hw/acpi/nvdimm.c | 61 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 61 insertions(+) diff --git a/hw/acpi/nvdimm.c b/hw/acpi/nvdimm.c index 4bbd1e7..f6f8413 100644 --- a/hw/acpi/nvdimm.c +++ b/hw/acpi/nvdimm.c @@ -466,6 +466,22 @@ typedef struct NvdimmFuncSetLabelDataIn NvdimmFuncSetLabelDataIn; QEMU_BUILD_BUG_ON(sizeof(NvdimmFuncSetLabelDataIn) + offsetof(NvdimmDsmIn, arg3) > 4096); +struct NvdimmFuncReadFITIn { + uint32_t offset; /* the offset of FIT buffer. */ +} QEMU_PACKED; +typedef struct NvdimmFuncReadFITIn NvdimmFuncReadFITIn; +QEMU_BUILD_BUG_ON(sizeof(NvdimmFuncReadFITIn) + + offsetof(NvdimmDsmIn, arg3) > 4096); + +struct NvdimmFuncReadFITOut { + /* the size of buffer filled by QEMU. */ + uint32_t len; + uint32_t func_ret_status; /* return status code. */ + uint8_t fit[0]; /* the FIT data. */ +} QEMU_PACKED; +typedef struct NvdimmFuncReadFITOut NvdimmFuncReadFITOut; +QEMU_BUILD_BUG_ON(sizeof(NvdimmFuncReadFITOut) > 4096); + static void nvdimm_dsm_function0(uint32_t supported_func, hwaddr dsm_mem_addr) { @@ -486,6 +502,46 @@ nvdimm_dsm_no_payload(uint32_t func_ret_status, hwaddr dsm_mem_addr) cpu_physical_memory_write(dsm_mem_addr, &out, sizeof(out)); } +/* Read FIT data, defined in docs/specs/acpi_nvdimm.txt. */ +static void nvdimm_dsm_func_read_fit(NvdimmDsmIn *in, hwaddr dsm_mem_addr) +{ + NvdimmFuncReadFITIn *read_fit; + NvdimmFuncReadFITOut *read_fit_out; + GSList *device_list = nvdimm_get_plugged_device_list(); + GArray *fit = nvdimm_build_device_structure(device_list); + uint32_t read_len = 0, func_ret_status; + int size; + + read_fit = (NvdimmFuncReadFITIn *)in->arg3; + le32_to_cpus(&read_fit->offset); + + nvdimm_debug("Read FIT: offset %#x FIT size %#x.\n", read_fit->offset, + fit->len); + + if (read_fit->offset > fit->len) { + func_ret_status = 3 /* Invalid Input Parameters */; + goto build_out; + } + + func_ret_status = 0 /* Success */; + read_len = MIN(fit->len - read_fit->offset, + 4096 - sizeof(NvdimmFuncReadFITOut)); + +build_out: + size = sizeof(NvdimmFuncReadFITOut) + read_len; + read_fit_out = g_malloc(size); + + read_fit_out->len = cpu_to_le32(size); + read_fit_out->func_ret_status = cpu_to_le32(func_ret_status); + memcpy(read_fit_out->fit, fit->data + read_fit->offset, read_len); + + cpu_physical_memory_write(dsm_mem_addr, read_fit_out, size); + + g_slist_free(device_list); + g_array_free(fit, true); + g_free(read_fit_out); +} + static void nvdimm_dsm_root(NvdimmDsmIn *in, hwaddr dsm_mem_addr) { /* @@ -498,6 +554,11 @@ static void nvdimm_dsm_root(NvdimmDsmIn *in, hwaddr dsm_mem_addr) return; } + if (in->function == 0xFFFFFFFF /* Read FIT */) { + nvdimm_dsm_func_read_fit(in, dsm_mem_addr); + return; + } + /* No function except function 0 is supported yet. */ nvdimm_dsm_no_payload(1 /* Not Supported */, dsm_mem_addr); }