From patchwork Fri Sep 8 14:21:31 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Hildenbrand X-Patchwork-Id: 13377519 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id B3DF3EE800F for ; Fri, 8 Sep 2023 14:23:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S243836AbjIHOXM (ORCPT ); Fri, 8 Sep 2023 10:23:12 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38770 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S243853AbjIHOXJ (ORCPT ); Fri, 8 Sep 2023 10:23:09 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 17A541FC6 for ; Fri, 8 Sep 2023 07:22:18 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1694182937; 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=514wTQxaHYtnxSk3ThPQLF4tfMogtFuGARQoE0qmeVc=; b=YsFRxCxQty2yplh83BFIA0Kqnxw2g76n5HC4ItfRS+V4j8Ewk6tAIMVablxIFxLB+49019 PZgDQzgpP7oJUkbG2pGAIsG/SqbG5DbmrKoL66sN9Jqh/VKiBV/JfYWeWkxkTPGUPyeVdr MDFcIw4mDiCi9DDCaG9vL0IMR2eGZx4= 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-501-D7Up91O8OEWekiN_z8Wg9w-1; Fri, 08 Sep 2023 10:22:13 -0400 X-MC-Unique: D7Up91O8OEWekiN_z8Wg9w-1 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.rdu2.redhat.com [10.11.54.8]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 7649980D75F; Fri, 8 Sep 2023 14:22:12 +0000 (UTC) Received: from t14s.redhat.com (unknown [10.39.194.76]) by smtp.corp.redhat.com (Postfix) with ESMTP id D3CE1C03295; Fri, 8 Sep 2023 14:22:09 +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 v3 11/16] vhost: Add vhost_get_max_memslots() Date: Fri, 8 Sep 2023 16:21:31 +0200 Message-ID: <20230908142136.403541-12-david@redhat.com> In-Reply-To: <20230908142136.403541-1-david@redhat.com> References: <20230908142136.403541-1-david@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.1 on 10.11.54.8 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Let's add vhost_get_max_memslots(). Signed-off-by: David Hildenbrand Reviewed-by: Maciej S. Szmigiero --- hw/virtio/vhost-stub.c | 5 +++++ hw/virtio/vhost.c | 11 +++++++++++ include/hw/virtio/vhost.h | 1 + 3 files changed, 17 insertions(+) diff --git a/hw/virtio/vhost-stub.c b/hw/virtio/vhost-stub.c index d53dd9d288..52d42adab2 100644 --- a/hw/virtio/vhost-stub.c +++ b/hw/virtio/vhost-stub.c @@ -2,6 +2,11 @@ #include "hw/virtio/vhost.h" #include "hw/virtio/vhost-user.h" +unsigned int vhost_get_max_memslots(void) +{ + return UINT_MAX; +} + unsigned int vhost_get_free_memslots(void) { return UINT_MAX; diff --git a/hw/virtio/vhost.c b/hw/virtio/vhost.c index f7e1ac12a8..ee193b07c7 100644 --- a/hw/virtio/vhost.c +++ b/hw/virtio/vhost.c @@ -55,6 +55,17 @@ static unsigned int used_shared_memslots; static QLIST_HEAD(, vhost_dev) vhost_devices = QLIST_HEAD_INITIALIZER(vhost_devices); +unsigned int vhost_get_max_memslots(void) +{ + unsigned int max = UINT_MAX; + struct vhost_dev *hdev; + + QLIST_FOREACH(hdev, &vhost_devices, entry) { + max = MIN(max, hdev->vhost_ops->vhost_backend_memslots_limit(hdev)); + } + return max; +} + unsigned int vhost_get_free_memslots(void) { unsigned int free = UINT_MAX; diff --git a/include/hw/virtio/vhost.h b/include/hw/virtio/vhost.h index 603bf834be..c7e5467693 100644 --- a/include/hw/virtio/vhost.h +++ b/include/hw/virtio/vhost.h @@ -315,6 +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); +unsigned int vhost_get_max_memslots(void); unsigned int vhost_get_free_memslots(void); int vhost_net_set_backend(struct vhost_dev *hdev,