From patchwork Tue Mar 1 10:56:10 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xiao Guangrong X-Patchwork-Id: 8464251 Return-Path: X-Original-To: patchwork-kvm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 8EC8EC0553 for ; Tue, 1 Mar 2016 10:56:47 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id A9856200E1 for ; Tue, 1 Mar 2016 10:56:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B16E320148 for ; Tue, 1 Mar 2016 10:56:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753204AbcCAK4k (ORCPT ); Tue, 1 Mar 2016 05:56:40 -0500 Received: from mga03.intel.com ([134.134.136.65]:23239 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753192AbcCAK4h (ORCPT ); Tue, 1 Mar 2016 05:56:37 -0500 Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by orsmga103.jf.intel.com with ESMTP; 01 Mar 2016 02:56:37 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.22,522,1449561600"; d="scan'208";a="57509825" Received: from xiaoreal1.sh.intel.com (HELO xiaoreal1.sh.intel.com.sh.intel.com) ([10.239.48.79]) by fmsmga004.fm.intel.com with ESMTP; 01 Mar 2016 02:56:35 -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 8/9] nvdimm acpi: emulate dsm method Date: Tue, 1 Mar 2016 18:56:10 +0800 Message-Id: <1456829771-71553-9-git-send-email-guangrong.xiao@linux.intel.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1456829771-71553-1-git-send-email-guangrong.xiao@linux.intel.com> References: <1456829771-71553-1-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 Emulate dsm method after IO VM-exit Currently, we only introduce the framework and no function is actually supported Signed-off-by: Xiao Guangrong --- hw/acpi/aml-build.c | 2 +- hw/acpi/nvdimm.c | 44 ++++++++++++++++++++++++++++++++++++++++++++ include/hw/acpi/aml-build.h | 1 + include/hw/mem/nvdimm.h | 8 ++++++++ 4 files changed, 54 insertions(+), 1 deletion(-) diff --git a/hw/acpi/aml-build.c b/hw/acpi/aml-build.c index ab89ca6..da11bf8 100644 --- a/hw/acpi/aml-build.c +++ b/hw/acpi/aml-build.c @@ -227,7 +227,7 @@ static void build_extop_package(GArray *package, uint8_t op) build_prepend_byte(package, 0x5B); /* ExtOpPrefix */ } -static void build_append_int_noprefix(GArray *table, uint64_t value, int size) +void build_append_int_noprefix(GArray *table, uint64_t value, int size) { int i; diff --git a/hw/acpi/nvdimm.c b/hw/acpi/nvdimm.c index 781f6c1..e0b483a 100644 --- a/hw/acpi/nvdimm.c +++ b/hw/acpi/nvdimm.c @@ -393,12 +393,56 @@ typedef struct NvdimmDsmOut NvdimmDsmOut; static uint64_t nvdimm_dsm_read(void *opaque, hwaddr addr, unsigned size) { + fprintf(stderr, "BUG: we never read _DSM IO Port.\n"); return 0; } static void nvdimm_dsm_write(void *opaque, hwaddr addr, uint64_t val, unsigned size) { + NvdimmDsmIn *in; + GArray *out; + uint32_t buf_size; + hwaddr dsm_mem_addr = val; + + nvdimm_debug("dsm memory address %#lx.\n", dsm_mem_addr); + + /* + * The DSM memory is mapped to guest address space so an evil guest + * can change its content while we are doing DSM emulation. Avoid + * this by copying DSM memory to QEMU local memory. + */ + in = g_malloc(TARGET_PAGE_SIZE); + cpu_physical_memory_read(dsm_mem_addr, in, TARGET_PAGE_SIZE); + + le32_to_cpus(&in->revision); + le32_to_cpus(&in->function); + le32_to_cpus(&in->handle); + + nvdimm_debug("Revision %#x Handler %#x Function %#x.\n", in->revision, + in->handle, in->function); + + out = g_array_new(false, true /* clear */, 1); + + /* + * function 0 is called to inquire what functions are supported by + * OSPM + */ + if (in->function == 0) { + build_append_int_noprefix(out, 0 /* No function Supported */, + sizeof(uint8_t)); + } else { + /* No function is supported yet. */ + build_append_int_noprefix(out, 1 /* Not Supported */, + sizeof(uint8_t)); + } + + buf_size = cpu_to_le32(out->len); + cpu_physical_memory_write(dsm_mem_addr, &buf_size, sizeof(buf_size)); + cpu_physical_memory_write(dsm_mem_addr + sizeof(buf_size), out->data, + out->len); + g_free(in); + g_array_free(out, true); } static const MemoryRegionOps nvdimm_dsm_ops = { diff --git a/include/hw/acpi/aml-build.h b/include/hw/acpi/aml-build.h index 7404e2a..b0826f0 100644 --- a/include/hw/acpi/aml-build.h +++ b/include/hw/acpi/aml-build.h @@ -357,6 +357,7 @@ Aml *aml_derefof(Aml *arg); Aml *aml_sizeof(Aml *arg); Aml *aml_concatenate(Aml *source1, Aml *source2, Aml *target); +void build_append_int_noprefix(GArray *table, uint64_t value, int size); void build_header(GArray *linker, GArray *table_data, AcpiTableHeader *h, const char *sig, int len, uint8_t rev, diff --git a/include/hw/mem/nvdimm.h b/include/hw/mem/nvdimm.h index 634c60b..aaa2608 100644 --- a/include/hw/mem/nvdimm.h +++ b/include/hw/mem/nvdimm.h @@ -25,6 +25,14 @@ #include "hw/mem/pc-dimm.h" +#define NVDIMM_DEBUG 0 +#define nvdimm_debug(fmt, ...) \ + do { \ + if (NVDIMM_DEBUG) { \ + fprintf(stderr, "nvdimm: " fmt, ## __VA_ARGS__); \ + } \ + } while (0) + #define TYPE_NVDIMM "nvdimm" #define NVDIMM_DSM_MEM_FILE "etc/acpi/nvdimm-mem"