From patchwork Tue Mar 15 15:01:43 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Michael S. Tsirkin" X-Patchwork-Id: 8589401 Return-Path: X-Original-To: patchwork-qemu-devel@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 1E35E9F6E1 for ; Tue, 15 Mar 2016 15:17:26 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 6DD362012B for ; Tue, 15 Mar 2016 15:17:25 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id D23FB20263 for ; Tue, 15 Mar 2016 15:17:20 +0000 (UTC) Received: from localhost ([::1]:49013 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1afqim-00048u-5K for patchwork-qemu-devel@patchwork.kernel.org; Tue, 15 Mar 2016 11:17:20 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:58042) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1afqTp-0000I1-A5 for qemu-devel@nongnu.org; Tue, 15 Mar 2016 11:01:59 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1afqTj-0006s9-FU for qemu-devel@nongnu.org; Tue, 15 Mar 2016 11:01:53 -0400 Received: from mx1.redhat.com ([209.132.183.28]:54194) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1afqTj-0006rS-7J for qemu-devel@nongnu.org; Tue, 15 Mar 2016 11:01:47 -0400 Received: from int-mx11.intmail.prod.int.phx2.redhat.com (int-mx11.intmail.prod.int.phx2.redhat.com [10.5.11.24]) by mx1.redhat.com (Postfix) with ESMTPS id C6F777824A; Tue, 15 Mar 2016 15:01:46 +0000 (UTC) Received: from redhat.com (vpn1-6-68.ams2.redhat.com [10.36.6.68]) by int-mx11.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with SMTP id u2FF1i0g011735; Tue, 15 Mar 2016 11:01:44 -0400 Date: Tue, 15 Mar 2016 17:01:43 +0200 From: "Michael S. Tsirkin" To: qemu-devel@nongnu.org Message-ID: <1458053975-2410-26-git-send-email-mst@redhat.com> References: <1458053975-2410-1-git-send-email-mst@redhat.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <1458053975-2410-1-git-send-email-mst@redhat.com> X-Mutt-Fcc: =sent X-Scanned-By: MIMEDefang 2.68 on 10.5.11.24 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-Received-From: 209.132.183.28 Cc: Peter Maydell , Xiao Guangrong , Eduardo Habkost , Igor Mammedov Subject: [Qemu-devel] [PULL v2 25/51] nvdimm acpi: emulate dsm method 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+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, 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 From: Xiao Guangrong Emulate dsm method after IO VM-exit Currently, we only introduce the framework and no function is actually supported Signed-off-by: Xiao Guangrong Reviewed-by: Michael S. Tsirkin Signed-off-by: Michael S. Tsirkin --- include/hw/mem/nvdimm.h | 8 +++++++ hw/acpi/nvdimm.c | 56 +++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 64 insertions(+) diff --git a/include/hw/mem/nvdimm.h b/include/hw/mem/nvdimm.h index 26d5b78..517de9c 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" diff --git a/hw/acpi/nvdimm.c b/hw/acpi/nvdimm.c index 19c2642..9531340 100644 --- a/hw/acpi/nvdimm.c +++ b/hw/acpi/nvdimm.c @@ -390,15 +390,71 @@ struct NvdimmDsmOut { } QEMU_PACKED; typedef struct NvdimmDsmOut NvdimmDsmOut; +struct NvdimmDsmFunc0Out { + /* the size of buffer filled by QEMU. */ + uint32_t len; + uint32_t supported_func; +} QEMU_PACKED; +typedef struct NvdimmDsmFunc0Out NvdimmDsmFunc0Out; + +struct NvdimmDsmFuncNoPayloadOut { + /* the size of buffer filled by QEMU. */ + uint32_t len; + uint32_t func_ret_status; +} QEMU_PACKED; +typedef struct NvdimmDsmFuncNoPayloadOut NvdimmDsmFuncNoPayloadOut; + static uint64_t nvdimm_dsm_read(void *opaque, hwaddr addr, unsigned size) { + nvdimm_debug("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; + hwaddr dsm_mem_addr = val; + + nvdimm_debug("dsm memory address %#" HWADDR_PRIx ".\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); + + /* + * function 0 is called to inquire which functions are supported by + * OSPM + */ + if (in->function == 0) { + NvdimmDsmFunc0Out func0 = { + .len = cpu_to_le32(sizeof(func0)), + /* No function supported other than function 0 */ + .supported_func = cpu_to_le32(0), + }; + cpu_physical_memory_write(dsm_mem_addr, &func0, sizeof func0); + } else { + /* No function except function 0 is supported yet. */ + NvdimmDsmFuncNoPayloadOut out = { + .len = cpu_to_le32(sizeof(out)), + .func_ret_status = cpu_to_le32(1) /* Not Supported */, + }; + cpu_physical_memory_write(dsm_mem_addr, &out, sizeof(out)); + } + + g_free(in); } static const MemoryRegionOps nvdimm_dsm_ops = {