From nobody Tue Nov 4 21:21:19 2025 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=redhat.com Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1538732573686256.2091685139983; Fri, 5 Oct 2018 02:42:53 -0700 (PDT) Received: from localhost ([::1]:34178 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1g8MdD-00053d-DT for importer@patchew.org; Fri, 05 Oct 2018 05:42:47 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:47368) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1g8MRg-0001nn-Ex for qemu-devel@nongnu.org; Fri, 05 Oct 2018 05:30:54 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1g8MJB-0006cX-Vm for qemu-devel@nongnu.org; Fri, 05 Oct 2018 05:22:07 -0400 Received: from mx1.redhat.com ([209.132.183.28]:55870) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1g8MJB-0006c6-NF; Fri, 05 Oct 2018 05:22:05 -0400 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 7924DC04B928; Fri, 5 Oct 2018 09:22:04 +0000 (UTC) Received: from t460s.redhat.com (ovpn-116-131.ams2.redhat.com [10.36.116.131]) by smtp.corp.redhat.com (Postfix) with ESMTP id BE67310018F8; Fri, 5 Oct 2018 09:22:00 +0000 (UTC) From: David Hildenbrand To: qemu-devel@nongnu.org Date: Fri, 5 Oct 2018 11:20:18 +0200 Message-Id: <20181005092024.14344-11-david@redhat.com> In-Reply-To: <20181005092024.14344-1-david@redhat.com> References: <20181005092024.14344-1-david@redhat.com> X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.31]); Fri, 05 Oct 2018 09:22:05 +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] [PATCH v5 10/16] memory-device: factor out get_memory_region() from pc-dimm 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: Pankaj Gupta , Eduardo Habkost , "Michael S . Tsirkin" , Xiao Guangrong , David Hildenbrand , "Dr . David Alan Gilbert" , Markus Armbruster , Auger Eric , Alexander Graf , qemu-ppc@nongnu.org, Paolo Bonzini , Igor Mammedov , Luiz Capitulino , David Gibson , Richard Henderson Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RDMRC_1 RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" The memory region is necessary for plugging/unplugging a memory device. The region size (via get_region_size()) is no longer sufficient, as besides the alignment, also the region itself is required in order to add it to the device memory region of the machine via - memory_region_add_subregion - memory_region_del_subregion So, to factor out plugging/unplugging of memory devices from pc-dimm code, we have to factor out access to the memory region first. Reviewed-by: David Gibson Reviewed-by: Igor Mammedov Signed-off-by: David Hildenbrand --- hw/mem/nvdimm.c | 9 ++++++--- hw/mem/pc-dimm.c | 27 ++++++++++++++++++--------- include/hw/mem/memory-device.h | 15 +++++++++++++++ include/hw/mem/pc-dimm.h | 4 ---- 4 files changed, 39 insertions(+), 16 deletions(-) diff --git a/hw/mem/nvdimm.c b/hw/mem/nvdimm.c index 1c6674c4ed..49324f3fae 100644 --- a/hw/mem/nvdimm.c +++ b/hw/mem/nvdimm.c @@ -27,6 +27,7 @@ #include "qapi/error.h" #include "qapi/visitor.h" #include "hw/mem/nvdimm.h" +#include "hw/mem/memory-device.h" =20 static void nvdimm_get_label_size(Object *obj, Visitor *v, const char *nam= e, void *opaque, Error **errp) @@ -118,9 +119,10 @@ static void nvdimm_prepare_memory_region(NVDIMMDevice = *nvdimm, Error **errp) nvdimm->nvdimm_mr->align =3D align; } =20 -static MemoryRegion *nvdimm_get_memory_region(PCDIMMDevice *dimm, Error **= errp) +static MemoryRegion *nvdimm_md_get_memory_region(MemoryDeviceState *md, + Error **errp) { - NVDIMMDevice *nvdimm =3D NVDIMM(dimm); + NVDIMMDevice *nvdimm =3D NVDIMM(md); Error *local_err =3D NULL; =20 if (!nvdimm->nvdimm_mr) { @@ -190,11 +192,12 @@ static Property nvdimm_properties[] =3D { static void nvdimm_class_init(ObjectClass *oc, void *data) { PCDIMMDeviceClass *ddc =3D PC_DIMM_CLASS(oc); + MemoryDeviceClass *mdc =3D MEMORY_DEVICE_CLASS(oc); NVDIMMClass *nvc =3D NVDIMM_CLASS(oc); DeviceClass *dc =3D DEVICE_CLASS(oc); =20 ddc->realize =3D nvdimm_realize; - ddc->get_memory_region =3D nvdimm_get_memory_region; + mdc->get_memory_region =3D nvdimm_md_get_memory_region; dc->props =3D nvdimm_properties; =20 nvc->read_label_data =3D nvdimm_read_label_data; diff --git a/hw/mem/pc-dimm.c b/hw/mem/pc-dimm.c index 3e43ec8742..c9f6ad589e 100644 --- a/hw/mem/pc-dimm.c +++ b/hw/mem/pc-dimm.c @@ -32,7 +32,7 @@ static int pc_dimm_get_free_slot(const int *hint, int max= _slots, Error **errp); void pc_dimm_pre_plug(PCDIMMDevice *dimm, MachineState *machine, const uint64_t *legacy_align, Error **errp) { - PCDIMMDeviceClass *ddc =3D PC_DIMM_GET_CLASS(dimm); + MemoryDeviceClass *mdc =3D MEMORY_DEVICE_GET_CLASS(dimm); Error *local_err =3D NULL; MemoryRegion *mr; uint64_t addr, align; @@ -49,7 +49,7 @@ void pc_dimm_pre_plug(PCDIMMDevice *dimm, MachineState *m= achine, &error_abort); trace_mhp_pc_dimm_assigned_slot(slot); =20 - mr =3D ddc->get_memory_region(dimm, &local_err); + mr =3D mdc->get_memory_region(MEMORY_DEVICE(dimm), &local_err); if (local_err) { goto out; } @@ -72,9 +72,11 @@ out: void pc_dimm_plug(PCDIMMDevice *dimm, MachineState *machine, Error **errp) { PCDIMMDeviceClass *ddc =3D PC_DIMM_GET_CLASS(dimm); + MemoryDeviceClass *mdc =3D MEMORY_DEVICE_GET_CLASS(dimm); MemoryRegion *vmstate_mr =3D ddc->get_vmstate_memory_region(dimm, &error_abort= ); - MemoryRegion *mr =3D ddc->get_memory_region(dimm, &error_abort); + MemoryRegion *mr =3D mdc->get_memory_region(MEMORY_DEVICE(dimm), + &error_abort); uint64_t addr; =20 addr =3D object_property_get_uint(OBJECT(dimm), PC_DIMM_ADDR_PROP, @@ -87,9 +89,11 @@ void pc_dimm_plug(PCDIMMDevice *dimm, MachineState *mach= ine, Error **errp) void pc_dimm_unplug(PCDIMMDevice *dimm, MachineState *machine) { PCDIMMDeviceClass *ddc =3D PC_DIMM_GET_CLASS(dimm); + MemoryDeviceClass *mdc =3D MEMORY_DEVICE_GET_CLASS(dimm); MemoryRegion *vmstate_mr =3D ddc->get_vmstate_memory_region(dimm, &error_abort= ); - MemoryRegion *mr =3D ddc->get_memory_region(dimm, &error_abort); + MemoryRegion *mr =3D mdc->get_memory_region(MEMORY_DEVICE(dimm), + &error_abort); =20 memory_device_unplug_region(machine, mr); vmstate_unregister_ram(vmstate_mr, DEVICE(dimm)); @@ -235,12 +239,11 @@ static uint64_t pc_dimm_md_get_addr(const MemoryDevic= eState *md) static uint64_t pc_dimm_md_get_region_size(const MemoryDeviceState *md, Error **errp) { - /* dropping const here is fine as we don't touch the memory region */ - PCDIMMDevice *dimm =3D PC_DIMM(md); - const PCDIMMDeviceClass *ddc =3D PC_DIMM_GET_CLASS(md); + MemoryDeviceClass *mdc =3D MEMORY_DEVICE_GET_CLASS(md); MemoryRegion *mr; =20 - mr =3D ddc->get_memory_region(dimm, errp); + /* dropping const here is fine as we don't touch the memory region */ + mr =3D mdc->get_memory_region((MemoryDeviceState *)md, errp); if (!mr) { return 0; } @@ -248,6 +251,12 @@ static uint64_t pc_dimm_md_get_region_size(const Memor= yDeviceState *md, return memory_region_size(mr); } =20 +static MemoryRegion *pc_dimm_md_get_memory_region(MemoryDeviceState *md, + Error **errp) +{ + return pc_dimm_get_memory_region(PC_DIMM(md), errp); +} + static void pc_dimm_md_fill_device_info(const MemoryDeviceState *md, MemoryDeviceInfo *info) { @@ -289,13 +298,13 @@ static void pc_dimm_class_init(ObjectClass *oc, void = *data) dc->props =3D pc_dimm_properties; dc->desc =3D "DIMM memory module"; =20 - ddc->get_memory_region =3D pc_dimm_get_memory_region; ddc->get_vmstate_memory_region =3D pc_dimm_get_memory_region; =20 mdc->get_addr =3D pc_dimm_md_get_addr; /* for a dimm plugged_size =3D=3D region_size */ mdc->get_plugged_size =3D pc_dimm_md_get_region_size; mdc->get_region_size =3D pc_dimm_md_get_region_size; + mdc->get_memory_region =3D pc_dimm_md_get_memory_region; mdc->fill_device_info =3D pc_dimm_md_fill_device_info; } =20 diff --git a/include/hw/mem/memory-device.h b/include/hw/mem/memory-device.h index 898df3057d..659f38385c 100644 --- a/include/hw/mem/memory-device.h +++ b/include/hw/mem/memory-device.h @@ -38,6 +38,11 @@ typedef struct MemoryDeviceState { * mapped into guest physical address space at a certain address. The * address in guest physical memory can either be specified explicitly * or get assigned automatically. + * + * Conceptually, memory devices only span one memory region. If multiple + * successive memory regions are used, a covering memory region has to + * be provided. Scattered memory regions are not supported for single + * devices. */ typedef struct MemoryDeviceClass { /* private */ @@ -68,6 +73,16 @@ typedef struct MemoryDeviceClass { uint64_t (*get_plugged_size)(const MemoryDeviceState *md, Error **errp= ); uint64_t (*get_region_size)(const MemoryDeviceState *md, Error **errp); =20 + /* + * Return the memory region of the memory device. + * + * Called when (un)plugging the memory device, to (un)map the + * memory region in guest physical memory, but also to detect the + * required alignment during address assignment or when the size of the + * memory region is required. + */ + MemoryRegion *(*get_memory_region)(MemoryDeviceState *md, Error **errp= ); + /* * Translate the memory device into #MemoryDeviceInfo. */ diff --git a/include/hw/mem/pc-dimm.h b/include/hw/mem/pc-dimm.h index 99cbd54de7..01436b9f50 100644 --- a/include/hw/mem/pc-dimm.h +++ b/include/hw/mem/pc-dimm.h @@ -61,9 +61,6 @@ typedef struct PCDIMMDevice { * PCDIMMDeviceClass: * @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. Will not - * fail after the device was realized. * @get_vmstate_memory_region: returns #MemoryRegion which indicates the * memory of @dimm should be kept during live migration. Will not fail * after the device was realized. @@ -74,7 +71,6 @@ typedef struct PCDIMMDeviceClass { =20 /* public */ void (*realize)(PCDIMMDevice *dimm, Error **errp); - MemoryRegion *(*get_memory_region)(PCDIMMDevice *dimm, Error **errp); MemoryRegion *(*get_vmstate_memory_region)(PCDIMMDevice *dimm, Error **errp); } PCDIMMDeviceClass; --=20 2.17.1