From patchwork Mon Jun 13 20:40:10 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: 9174295 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 1C9CF60573 for ; Mon, 13 Jun 2016 20:49:50 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id E57471FFC7 for ; Mon, 13 Jun 2016 20:49:49 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id D8F4A264F4; Mon, 13 Jun 2016 20:49:49 +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 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.wl.linuxfoundation.org (Postfix) with ESMTPS id 4B7E71FFC7 for ; Mon, 13 Jun 2016 20:49:49 +0000 (UTC) Received: from localhost ([::1]:59192 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bCYns-0003n8-E2 for patchwork-qemu-devel@patchwork.kernel.org; Mon, 13 Jun 2016 16:49:48 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:46412) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bCYei-0003p8-Hi for qemu-devel@nongnu.org; Mon, 13 Jun 2016 16:40:21 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1bCYec-0002lH-FZ for qemu-devel@nongnu.org; Mon, 13 Jun 2016 16:40:19 -0400 Received: from mx1.redhat.com ([209.132.183.28]:33058) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bCYec-0002l9-7H for qemu-devel@nongnu.org; Mon, 13 Jun 2016 16:40:14 -0400 Received: from int-mx10.intmail.prod.int.phx2.redhat.com (int-mx10.intmail.prod.int.phx2.redhat.com [10.5.11.23]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id C95B97F352; Mon, 13 Jun 2016 20:40:13 +0000 (UTC) Received: from redhat.com (vpn1-6-220.ams2.redhat.com [10.36.6.220]) by int-mx10.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with SMTP id u5DKeB49003530; Mon, 13 Jun 2016 16:40:12 -0400 Date: Mon, 13 Jun 2016 23:40:10 +0300 From: "Michael S. Tsirkin" To: qemu-devel@nongnu.org Message-ID: <20160613234010-mutt-send-email-mst@redhat.com> References: <1465850292-10726-1-git-send-email-mst@redhat.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <1465850292-10726-1-git-send-email-mst@redhat.com> X-Mutt-Fcc: =sent X-Scanned-By: MIMEDefang 2.68 on 10.5.11.23 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.26]); Mon, 13 Jun 2016 20:40:13 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PULL 19/32] pc-dimm: introduce get_vmstate_memory_region callback X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Peter Maydell , Xiao Guangrong , Stefan Hajnoczi , Igor Mammedov Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP From: Xiao Guangrong This callback returns the MemoryRegion that is the memory of dimm should be kept during live migration nvdimm device is different with pc-dimm as its memory includes not only the MemoryRegion directly mapping to guest's address space but also the memory used as label data Signed-off-by: Xiao Guangrong Reviewed-by: Stefan Hajnoczi Reviewed-by: Michael S. Tsirkin Signed-off-by: Michael S. Tsirkin --- include/hw/mem/pc-dimm.h | 5 ++++- hw/mem/pc-dimm.c | 14 ++++++++++++-- 2 files changed, 16 insertions(+), 3 deletions(-) diff --git a/include/hw/mem/pc-dimm.h b/include/hw/mem/pc-dimm.h index 67e92d8..1e483f2 100644 --- a/include/hw/mem/pc-dimm.h +++ b/include/hw/mem/pc-dimm.h @@ -61,7 +61,9 @@ typedef struct PCDIMMDevice { * @realize: called after common dimm is realized so that the dimm based * devices get the chance to do specified operations. * @get_memory_region: returns #MemoryRegion associated with @dimm which - * is directly mapped into the physical address space of guest + * is directly mapped into the physical address space of guest. + * @get_vmstate_memory_region: returns #MemoryRegion which indicates the + * memory of @dimm should be kept during live migration. */ typedef struct PCDIMMDeviceClass { /* private */ @@ -70,6 +72,7 @@ typedef struct PCDIMMDeviceClass { /* public */ void (*realize)(PCDIMMDevice *dimm, Error **errp); MemoryRegion *(*get_memory_region)(PCDIMMDevice *dimm); + MemoryRegion *(*get_vmstate_memory_region)(PCDIMMDevice *dimm); } PCDIMMDeviceClass; /** diff --git a/hw/mem/pc-dimm.c b/hw/mem/pc-dimm.c index 6de2275..249193a 100644 --- a/hw/mem/pc-dimm.c +++ b/hw/mem/pc-dimm.c @@ -40,6 +40,8 @@ void pc_dimm_memory_plug(DeviceState *dev, MemoryHotplugState *hpms, int slot; MachineState *machine = MACHINE(qdev_get_machine()); PCDIMMDevice *dimm = PC_DIMM(dev); + PCDIMMDeviceClass *ddc = PC_DIMM_GET_CLASS(dimm); + MemoryRegion *vmstate_mr = ddc->get_vmstate_memory_region(dimm); Error *local_err = NULL; uint64_t existing_dimms_capacity = 0; uint64_t addr; @@ -105,7 +107,7 @@ void pc_dimm_memory_plug(DeviceState *dev, MemoryHotplugState *hpms, } memory_region_add_subregion(&hpms->mr, addr - hpms->base, mr); - vmstate_register_ram(mr, dev); + vmstate_register_ram(vmstate_mr, dev); numa_set_mem_node_id(addr, memory_region_size(mr), dimm->node); out: @@ -116,10 +118,12 @@ void pc_dimm_memory_unplug(DeviceState *dev, MemoryHotplugState *hpms, MemoryRegion *mr) { PCDIMMDevice *dimm = PC_DIMM(dev); + PCDIMMDeviceClass *ddc = PC_DIMM_GET_CLASS(dimm); + MemoryRegion *vmstate_mr = ddc->get_vmstate_memory_region(dimm); numa_unset_mem_node_id(dimm->addr, memory_region_size(mr), dimm->node); memory_region_del_subregion(&hpms->mr, mr); - vmstate_unregister_ram(mr, dev); + vmstate_unregister_ram(vmstate_mr, dev); } static int pc_existing_dimms_capacity_internal(Object *obj, void *opaque) @@ -424,6 +428,11 @@ static MemoryRegion *pc_dimm_get_memory_region(PCDIMMDevice *dimm) return host_memory_backend_get_memory(dimm->hostmem, &error_abort); } +static MemoryRegion *pc_dimm_get_vmstate_memory_region(PCDIMMDevice *dimm) +{ + return host_memory_backend_get_memory(dimm->hostmem, &error_abort); +} + static void pc_dimm_class_init(ObjectClass *oc, void *data) { DeviceClass *dc = DEVICE_CLASS(oc); @@ -434,6 +443,7 @@ static void pc_dimm_class_init(ObjectClass *oc, void *data) dc->desc = "DIMM memory module"; ddc->get_memory_region = pc_dimm_get_memory_region; + ddc->get_vmstate_memory_region = pc_dimm_get_vmstate_memory_region; } static TypeInfo pc_dimm_info = {