From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 623E7C433F5 for ; Thu, 6 Oct 2022 21:48:27 +0000 (UTC) Received: from localhost ([::1]:53672 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1ogYjC-0004mK-Hf for qemu-devel@archiver.kernel.org; Thu, 06 Oct 2022 17:48:26 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:40004) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1ogYWx-0003In-68 for qemu-devel@nongnu.org; Thu, 06 Oct 2022 17:35:49 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124]:42858) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1ogYWt-0006tj-Uf for qemu-devel@nongnu.org; Thu, 06 Oct 2022 17:35:46 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1665092142; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=2uoNyr/XSKf+OD83Nh+bVP2/xYaSIaJlR6XmlFpdjFM=; b=GI1gh2J2MUzDBR9J2Q+6bcczPNiJJTJMGnfSg5GzaUumB2ENzqpzqwyDNMgk4U8at1PWHl 3D6I5gh10jP33MFc4e1uJTgX805u1YlY/a8jHA3ac+r32LWIAPgz+klyHlWo3GpoxYO24C yl/adsTu8TiDVUbc0tA4vEhDskEWwFA= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-277-H44xBWIzNpm628qf-T4axA-1; Thu, 06 Oct 2022 17:35:37 -0400 X-MC-Unique: H44xBWIzNpm628qf-T4axA-1 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.rdu2.redhat.com [10.11.54.1]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 9ED9B858F13; Thu, 6 Oct 2022 21:35:36 +0000 (UTC) Received: from localhost (unknown [10.39.193.119]) by smtp.corp.redhat.com (Postfix) with ESMTP id 0EE82404705D; Thu, 6 Oct 2022 21:35:35 +0000 (UTC) From: Stefan Hajnoczi To: qemu-devel@nongnu.org Cc: Yanan Wang , sgarzare@redhat.com, "Richard W.M. Jones" , Fam Zheng , Hanna Reitz , David Hildenbrand , integration@gluster.org, qemu-block@nongnu.org, Vladimir Sementsov-Ogievskiy , Paolo Bonzini , Kevin Wolf , afaria@redhat.com, Richard Henderson , Eric Blake , "Michael S. Tsirkin" , Thomas Huth , Xie Changlong , John Snow , Eduardo Habkost , Jeff Cody , Stefan Hajnoczi , "Denis V. Lunev" , Markus Armbruster , Laurent Vivier , Peter Xu , Raphael Norwitz , Marcel Apfelbaum , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , Wen Congyang Subject: [PATCH v6 10/13] exec/cpu-common: add qemu_ram_get_fd() Date: Thu, 6 Oct 2022 17:35:04 -0400 Message-Id: <20221006213507.645402-11-stefanha@redhat.com> In-Reply-To: <20221006213507.645402-1-stefanha@redhat.com> References: <20221006213507.645402-1-stefanha@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 3.1 on 10.11.54.1 Received-SPF: pass client-ip=170.10.129.124; envelope-from=stefanha@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Add a function to get the file descriptor for a RAMBlock. Device emulation code typically uses the MemoryRegion APIs but vhost-style code may use RAMBlock directly for sharing guest memory with another process. This new API will be used by the libblkio block driver so it can share guest memory via .bdrv_register_buf(). Signed-off-by: Stefan Hajnoczi --- include/exec/cpu-common.h | 1 + softmmu/physmem.c | 5 +++++ 2 files changed, 6 insertions(+) diff --git a/include/exec/cpu-common.h b/include/exec/cpu-common.h index c493510ee9..6feaa40ca7 100644 --- a/include/exec/cpu-common.h +++ b/include/exec/cpu-common.h @@ -92,6 +92,7 @@ void qemu_ram_set_uf_zeroable(RAMBlock *rb); bool qemu_ram_is_migratable(RAMBlock *rb); void qemu_ram_set_migratable(RAMBlock *rb); void qemu_ram_unset_migratable(RAMBlock *rb); +int qemu_ram_get_fd(RAMBlock *rb); size_t qemu_ram_pagesize(RAMBlock *block); size_t qemu_ram_pagesize_largest(void); diff --git a/softmmu/physmem.c b/softmmu/physmem.c index 56e03e07b5..d9578ccfd4 100644 --- a/softmmu/physmem.c +++ b/softmmu/physmem.c @@ -1748,6 +1748,11 @@ void qemu_ram_unset_migratable(RAMBlock *rb) rb->flags &= ~RAM_MIGRATABLE; } +int qemu_ram_get_fd(RAMBlock *rb) +{ + return rb->fd; +} + /* Called with iothread lock held. */ void qemu_ram_set_idstr(RAMBlock *new_block, const char *name, DeviceState *dev) { -- 2.37.3