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 1538732707082614.5149269272404; Fri, 5 Oct 2018 02:45:07 -0700 (PDT) Received: from localhost ([::1]:34201 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1g8MfN-0007Ag-IF for importer@patchew.org; Fri, 05 Oct 2018 05:45:01 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:47318) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1g8MRh-0001nG-67 for qemu-devel@nongnu.org; Fri, 05 Oct 2018 05:30:57 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1g8MIz-0006Vq-Cd for qemu-devel@nongnu.org; Fri, 05 Oct 2018 05:21:56 -0400 Received: from mx1.redhat.com ([209.132.183.28]:57292) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1g8MIz-0006VQ-53; Fri, 05 Oct 2018 05:21:53 -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 5D0DBC04B2CC; Fri, 5 Oct 2018 09:21:52 +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 B59C5105704F; Fri, 5 Oct 2018 09:21:41 +0000 (UTC) From: David Hildenbrand To: qemu-devel@nongnu.org Date: Fri, 5 Oct 2018 11:20:16 +0200 Message-Id: <20181005092024.14344-9-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 [10.5.110.32]); Fri, 05 Oct 2018 09:21:52 +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 08/16] memory-device: document MemoryDeviceClass 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" Document the functions. Don't document get_region_size(), as we will be dropping/replacing that one soon. Use same documentation style as in include/exec/memory.h, but don't document the parameters, as they are self-explanatory. Reviewed-by: David Gibson Reviewed-by: Igor Mammedov Signed-off-by: David Hildenbrand --- include/hw/mem/memory-device.h | 36 ++++++++++++++++++++++++++++++++++ 1 file changed, 36 insertions(+) diff --git a/include/hw/mem/memory-device.h b/include/hw/mem/memory-device.h index f02b229837..0474a3dd11 100644 --- a/include/hw/mem/memory-device.h +++ b/include/hw/mem/memory-device.h @@ -29,12 +29,48 @@ typedef struct MemoryDeviceState { Object parent_obj; } MemoryDeviceState; =20 +/** + * MemoryDeviceClass: + * + * All memory devices need to implement TYPE_MEMORY_DEVICE as an interface. + * + * A memory device is a device that owns a memory region which is + * 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. + */ typedef struct MemoryDeviceClass { + /* private */ InterfaceClass parent_class; =20 + /* + * Return the address of the memory device in guest physical memory. + * + * Called when (un)plugging a memory device or when iterating over + * all memory devices mapped into guest physical address space. + * + * If "0" is returned, no address has been specified by the user and + * no address has been assigned to this memory device yet. + */ uint64_t (*get_addr)(const MemoryDeviceState *md); + + /* + * Return the amount of memory provided by the memory device currently + * usable ("plugged") by the VM. + * + * Called when calculating the total amount of ram available to the + * VM (e.g. to report memory stats to the user). + * + * This is helpful for devices that dynamically manage the amount of + * memory accessible by the guest via the reserved memory region. For + * most devices, this corresponds to the size of the memory region. + */ uint64_t (*get_plugged_size)(const MemoryDeviceState *md, Error **errp= ); uint64_t (*get_region_size)(const MemoryDeviceState *md, Error **errp); + + /* + * Translate the memory device into #MemoryDeviceInfo. + */ void (*fill_device_info)(const MemoryDeviceState *md, MemoryDeviceInfo *info); } MemoryDeviceClass; --=20 2.17.1