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 7B27BC28D13 for ; Mon, 22 Aug 2022 22:30:49 +0000 (UTC) Received: from localhost ([::1]:57000 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1oQFwW-0004KQ-Ir for qemu-devel@archiver.kernel.org; Mon, 22 Aug 2022 18:30:48 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:34456) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oQFqY-0001ml-Tz for qemu-devel@nongnu.org; Mon, 22 Aug 2022 18:24:38 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124]:20616) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oQFqV-0004c0-UE for qemu-devel@nongnu.org; Mon, 22 Aug 2022 18:24:37 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1661207075; 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=SGlMrQq7a+bcb/HnaNokUZUt1wwP6gWHLtMtPIbkMrk=; b=Gg9Wpy+sMbjWzVFH4UubDQ60nTHb/DAspAsHHsMKtwTqqTtA8fYp8wsZlUxNCapNzC76bc 5QIb6X99sDP1fTsNbFoHQkZA537WNV++H0X4y7w8web/Rljc/zVbQcL3uS75sJyvzhXJy9 rvmDxrgMUgSSWK6clpwuOUeAatItdOQ= Received: from mimecast-mx02.redhat.com (mx3-rdu2.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-45-owRqVrrHM1yr5VG1hbsX2g-1; Mon, 22 Aug 2022 18:24:30 -0400 X-MC-Unique: owRqVrrHM1yr5VG1hbsX2g-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.rdu2.redhat.com [10.11.54.7]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 1C90F299E776; Mon, 22 Aug 2022 22:24:29 +0000 (UTC) Received: from localhost (unknown [10.39.192.66]) by smtp.corp.redhat.com (Postfix) with ESMTP id 8D50414152E0; Mon, 22 Aug 2022 22:24:28 +0000 (UTC) From: Stefan Hajnoczi To: qemu-devel@nongnu.org Cc: Paolo Bonzini , "Denis V. Lunev" , Peter Xu , Yanan Wang , Marcel Apfelbaum , "Richard W.M. Jones" , qemu-block@nongnu.org, John Snow , integration@gluster.org, Vladimir Sementsov-Ogievskiy , Vladimir Sementsov-Ogievskiy , David Hildenbrand , Laurent Vivier , Markus Armbruster , Raphael Norwitz , Richard Henderson , Fam Zheng , sgarzare@redhat.com, Alberto Faria , Kevin Wolf , Stefan Hajnoczi , Wen Congyang , Eric Blake , Hanna Reitz , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , Eduardo Habkost , "Michael S. Tsirkin" , Thomas Huth , Jeff Cody , Xie Changlong Subject: [RFC v4 09/11] stubs: add qemu_ram_block_from_host() and qemu_ram_get_fd() Date: Mon, 22 Aug 2022 18:24:00 -0400 Message-Id: <20220822222402.176088-10-stefanha@redhat.com> In-Reply-To: <20220822222402.176088-1-stefanha@redhat.com> References: <20220822222402.176088-1-stefanha@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 2.85 on 10.11.54.7 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, T_SCC_BODY_TEXT_LINE=-0.01 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" The blkio block driver will need to look up the file descriptor for a given pointer. This is possible in softmmu builds where the RAMBlock API is available for querying guest RAM. Add stubs so tools like qemu-img that link the block layer still build successfully. In this case there is no guest RAM but that is fine. Bounce buffers and their file descriptors will be allocated with libblkio's blkio_alloc_mem_region() so we won't rely on QEMU's qemu_ram_get_fd() in that case. Signed-off-by: Stefan Hajnoczi --- stubs/physmem.c | 13 +++++++++++++ stubs/meson.build | 1 + 2 files changed, 14 insertions(+) create mode 100644 stubs/physmem.c diff --git a/stubs/physmem.c b/stubs/physmem.c new file mode 100644 index 0000000000..1fc5f2df29 --- /dev/null +++ b/stubs/physmem.c @@ -0,0 +1,13 @@ +#include "qemu/osdep.h" +#include "exec/cpu-common.h" + +RAMBlock *qemu_ram_block_from_host(void *ptr, bool round_offset, + ram_addr_t *offset) +{ + return NULL; +} + +int qemu_ram_get_fd(RAMBlock *rb) +{ + return -1; +} diff --git a/stubs/meson.build b/stubs/meson.build index d8f3fd5c44..4314161f5f 100644 --- a/stubs/meson.build +++ b/stubs/meson.build @@ -29,6 +29,7 @@ stub_ss.add(files('migr-blocker.c')) stub_ss.add(files('module-opts.c')) stub_ss.add(files('monitor.c')) stub_ss.add(files('monitor-core.c')) +stub_ss.add(files('physmem.c')) stub_ss.add(files('qemu-timer-notify-cb.c')) stub_ss.add(files('qmp_memory_device.c')) stub_ss.add(files('qmp-command-available.c')) -- 2.37.2