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 319CAC07E9D for ; Tue, 27 Sep 2022 19:46:51 +0000 (UTC) Received: from localhost ([::1]:57080 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1odGXP-0004x6-HS for qemu-devel@archiver.kernel.org; Tue, 27 Sep 2022 15:46:39 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:50758) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1odGN7-0001dG-9W for qemu-devel@nongnu.org; Tue, 27 Sep 2022 15:36:01 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124]:32979) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1odGN5-0004oV-3u for qemu-devel@nongnu.org; Tue, 27 Sep 2022 15:36:00 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1664307357; 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=rMAWH7T4jNFvBiGpw/D0I26YcYGg0D+L1tXNADXTNX8=; b=UdxCFmrRHrfzMKPjwTYdGbZbOi5PF2M4+TrP7k1XRMcLubg+aqB6jkVbKgFps9g4VLCRIK N5GdAXT/Jehh1e8vh25fL2cY02NbTBa0mZLgb0wWVtw1Y3aVm8DnL/Gg+q+7UqvDJWHb1U KAi61irySdXQDjCfTBnECeVBItaT3T4= 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-235-M-Kr7-9SMFqz7WNEJwrUlQ-1; Tue, 27 Sep 2022 15:35:54 -0400 X-MC-Unique: M-Kr7-9SMFqz7WNEJwrUlQ-1 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.rdu2.redhat.com [10.11.54.4]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id C0A40185A79C; Tue, 27 Sep 2022 19:35:51 +0000 (UTC) Received: from localhost (unknown [10.39.192.120]) by smtp.corp.redhat.com (Postfix) with ESMTP id EC8E02027062; Tue, 27 Sep 2022 19:35:50 +0000 (UTC) From: Stefan Hajnoczi To: qemu-devel@nongnu.org Cc: Yanan Wang , Kevin Wolf , Markus Armbruster , John Snow , "Denis V. Lunev" , Xie Changlong , Eric Blake , integration@gluster.org, David Hildenbrand , Wen Congyang , Laurent Vivier , "Richard W.M. Jones" , afaria@redhat.com, Fam Zheng , Thomas Huth , Hanna Reitz , Eduardo Habkost , Peter Xu , Raphael Norwitz , Stefan Hajnoczi , Marcel Apfelbaum , Vladimir Sementsov-Ogievskiy , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , Jeff Cody , qemu-block@nongnu.org, Paolo Bonzini , Richard Henderson , "Michael S. Tsirkin" , sgarzare@redhat.com Subject: [PATCH v5 09/12] exec/cpu-common: add qemu_ram_get_fd() Date: Tue, 27 Sep 2022 15:34:28 -0400 Message-Id: <20220927193431.22302-10-stefanha@redhat.com> In-Reply-To: <20220927193431.22302-1-stefanha@redhat.com> References: <20220927193431.22302-1-stefanha@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 3.1 on 10.11.54.4 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: -28 X-Spam_score: -2.9 X-Spam_bar: -- X-Spam_report: (-2.9 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.082, 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=ham 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 d909429427..5bd73a9db5 100644 --- a/include/exec/cpu-common.h +++ b/include/exec/cpu-common.h @@ -91,6 +91,7 @@ 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