From patchwork Fri Aug 25 13:21:38 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Hildenbrand X-Patchwork-Id: 13365660 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 0D2D0C88CB2 for ; Fri, 25 Aug 2023 13:23:29 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qZWlc-0001kO-7L; Fri, 25 Aug 2023 09:22:24 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qZWla-0001jM-8U for qemu-devel@nongnu.org; Fri, 25 Aug 2023 09:22:22 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qZWlY-0001lY-64 for qemu-devel@nongnu.org; Fri, 25 Aug 2023 09:22:22 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1692969739; 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=5aYype+/m5Ua9J9GXrOnmQCaHtgn/d5QZ+dupryNHxg=; b=HVxJLVKb2pnfHhL+Pd2Noh4rPNKt2lkvS0uCpWsLJbhxva/2Ni02eOQkjwXf7V1wyKEjMP F2wvKiYrWaeQb35Z1I+Vbch7qj4rgDDhoWYfGvamwFMpb7YRR7NTKRi0jJF+7L40tq81Mg SlfBiHT9M+q1mYeY/Fo3KS0RBNjQyKA= 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-691-uNMsFd4dPdaqfqJPLT03fg-1; Fri, 25 Aug 2023 09:22:14 -0400 X-MC-Unique: uNMsFd4dPdaqfqJPLT03fg-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 EDAD685CBE7; Fri, 25 Aug 2023 13:22:13 +0000 (UTC) Received: from t14s.fritz.box (unknown [10.39.193.68]) by smtp.corp.redhat.com (Postfix) with ESMTP id 67F92140E963; Fri, 25 Aug 2023 13:22:10 +0000 (UTC) From: David Hildenbrand To: qemu-devel@nongnu.org Cc: David Hildenbrand , Paolo Bonzini , Igor Mammedov , Xiao Guangrong , "Michael S. Tsirkin" , Peter Xu , =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= , Eduardo Habkost , Marcel Apfelbaum , Yanan Wang , Michal Privoznik , =?utf-8?q?Daniel_P_=2E_Berrang=C3=A9?= , Gavin Shan , Alex Williamson , Stefan Hajnoczi , "Maciej S . Szmigiero" , kvm@vger.kernel.org Subject: [PATCH v2 05/16] vhost: Return number of free memslots Date: Fri, 25 Aug 2023 15:21:38 +0200 Message-ID: <20230825132149.366064-6-david@redhat.com> In-Reply-To: <20230825132149.366064-1-david@redhat.com> References: <20230825132149.366064-1-david@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.1 on 10.11.54.7 Received-SPF: pass client-ip=170.10.129.124; envelope-from=david@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 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_NONE=-0.0001, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, 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-bounces+qemu-devel=archiver.kernel.org@nongnu.org Let's return the number of free slots instead of only checking if there is a free slot. Required to support memory devices that consume multiple memslots. This is a preparation for memory devices that consume multiple memslots. Signed-off-by: David Hildenbrand --- hw/mem/memory-device.c | 2 +- hw/virtio/vhost-stub.c | 4 ++-- hw/virtio/vhost.c | 4 ++-- include/hw/virtio/vhost.h | 2 +- 4 files changed, 6 insertions(+), 6 deletions(-) diff --git a/hw/mem/memory-device.c b/hw/mem/memory-device.c index 7c24685796..22c12a4345 100644 --- a/hw/mem/memory-device.c +++ b/hw/mem/memory-device.c @@ -63,7 +63,7 @@ static void memory_device_check_addable(MachineState *ms, MemoryRegion *mr, error_setg(errp, "hypervisor has no free memory slots left"); return; } - if (!vhost_has_free_slot()) { + if (!vhost_get_free_memslots()) { error_setg(errp, "a used vhost backend has no free memory slots left"); return; } diff --git a/hw/virtio/vhost-stub.c b/hw/virtio/vhost-stub.c index aa858ef3fb..d53dd9d288 100644 --- a/hw/virtio/vhost-stub.c +++ b/hw/virtio/vhost-stub.c @@ -2,9 +2,9 @@ #include "hw/virtio/vhost.h" #include "hw/virtio/vhost-user.h" -bool vhost_has_free_slot(void) +unsigned int vhost_get_free_memslots(void) { - return true; + return UINT_MAX; } bool vhost_user_init(VhostUserState *user, CharBackend *chr, Error **errp) diff --git a/hw/virtio/vhost.c b/hw/virtio/vhost.c index c16ad14535..8e84dca246 100644 --- a/hw/virtio/vhost.c +++ b/hw/virtio/vhost.c @@ -54,7 +54,7 @@ static unsigned int used_shared_memslots; static QLIST_HEAD(, vhost_dev) vhost_devices = QLIST_HEAD_INITIALIZER(vhost_devices); -bool vhost_has_free_slot(void) +unsigned int vhost_get_free_memslots(void) { unsigned int free = UINT_MAX; struct vhost_dev *hdev; @@ -71,7 +71,7 @@ bool vhost_has_free_slot(void) } free = MIN(free, cur_free); } - return free > 0; + return free; } static void vhost_dev_sync_region(struct vhost_dev *dev, diff --git a/include/hw/virtio/vhost.h b/include/hw/virtio/vhost.h index 6a173cb9fa..603bf834be 100644 --- a/include/hw/virtio/vhost.h +++ b/include/hw/virtio/vhost.h @@ -315,7 +315,7 @@ uint64_t vhost_get_features(struct vhost_dev *hdev, const int *feature_bits, */ void vhost_ack_features(struct vhost_dev *hdev, const int *feature_bits, uint64_t features); -bool vhost_has_free_slot(void); +unsigned int vhost_get_free_memslots(void); int vhost_net_set_backend(struct vhost_dev *hdev, struct vhost_vring_file *file);