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 X-Spam-Level: X-Spam-Status: No, score=-17.2 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 14593C433FE for ; Thu, 3 Dec 2020 17:07:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id AB9A0207B2 for ; Thu, 3 Dec 2020 17:07:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2501904AbgLCRHZ (ORCPT ); Thu, 3 Dec 2020 12:07:25 -0500 Received: from us-smtp-delivery-124.mimecast.com ([63.128.21.124]:39985 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725918AbgLCRHZ (ORCPT ); Thu, 3 Dec 2020 12:07:25 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1607015159; 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=FwRJrUBTPsHO6CS9p2N6npskY2prbgJKju6rYBszPUY=; b=HD8SMLaWEyq4VIJtdx6/d2ytaAL++Mi3W3LVLwXAKt8IElch7Rl6n4UWwnTDIyBM67spT9 dRZoP3wel+jUcFHJ8h+fJ0bo56ksopZlWVXGL/Obehna+atzDw/o0wfZnQGbtt09QJz9JL WYBAZe+vtJ7Zi6VqVu2og8gdJQxZ8l4= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-254-AenLv00DOHOZc5Kke33WtA-1; Thu, 03 Dec 2020 12:05:55 -0500 X-MC-Unique: AenLv00DOHOZc5Kke33WtA-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 137711922043; Thu, 3 Dec 2020 17:05:54 +0000 (UTC) Received: from steredhat.redhat.com (ovpn-113-142.ams2.redhat.com [10.36.113.142]) by smtp.corp.redhat.com (Postfix) with ESMTP id 5ED8160C15; Thu, 3 Dec 2020 17:05:44 +0000 (UTC) From: Stefano Garzarella To: virtualization@lists.linux-foundation.org Cc: Stefan Hajnoczi , "Michael S. Tsirkin" , Oren Duer , Jason Wang , Laurent Vivier , Stefano Garzarella , linux-kernel@vger.kernel.org, Max Gurtovoy , Shahaf Shuler , Eli Cohen Subject: [PATCH v3 04/19] vhost/iotlb: add VHOST_IOTLB_UNLIMITED macro Date: Thu, 3 Dec 2020 18:04:56 +0100 Message-Id: <20201203170511.216407-5-sgarzare@redhat.com> In-Reply-To: <20201203170511.216407-1-sgarzare@redhat.com> References: <20201203170511.216407-1-sgarzare@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org It's possible to allocate an unlimited IOTLB calling vhost_iotlb_alloc() with 'limit' = 0. Add a new macro (VHOST_IOTLB_UNLIMITED) for this case and document it in the vhost_iotlb_alloc() documentation block. Suggested-by: Jason Wang Signed-off-by: Stefano Garzarella --- include/linux/vhost_iotlb.h | 2 ++ drivers/vhost/iotlb.c | 3 ++- 2 files changed, 4 insertions(+), 1 deletion(-) diff --git a/include/linux/vhost_iotlb.h b/include/linux/vhost_iotlb.h index 6b09b786a762..47019f97f795 100644 --- a/include/linux/vhost_iotlb.h +++ b/include/linux/vhost_iotlb.h @@ -4,6 +4,8 @@ #include +#define VHOST_IOTLB_UNLIMITED 0 + struct vhost_iotlb_map { struct rb_node rb; struct list_head link; diff --git a/drivers/vhost/iotlb.c b/drivers/vhost/iotlb.c index 0fd3f87e913c..80fdde78ee5a 100644 --- a/drivers/vhost/iotlb.c +++ b/drivers/vhost/iotlb.c @@ -100,7 +100,8 @@ EXPORT_SYMBOL_GPL(vhost_iotlb_del_range); /** * vhost_iotlb_alloc - add a new vhost IOTLB - * @limit: maximum number of IOTLB entries + * @limit: maximum number of IOTLB entries (use VHOST_IOTLB_UNLIMITED for an + * unlimited IOTLB) * @flags: VHOST_IOTLB_FLAG_XXX * * Returns an error is memory allocation fails -- 2.26.2