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=-15.8 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 16FD0C4361B for ; Tue, 15 Dec 2020 15:01:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D88F922518 for ; Tue, 15 Dec 2020 15:01:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729737AbgLOOqv (ORCPT ); Tue, 15 Dec 2020 09:46:51 -0500 Received: from us-smtp-delivery-124.mimecast.com ([63.128.21.124]:20109 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729619AbgLOOpS (ORCPT ); Tue, 15 Dec 2020 09:45:18 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1608043431; 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=wArsqgzCWDcvwgGpOlHJ94D+i7gVf5ZKVnJlx27P+T8=; b=QORALRUnEinFrNANjB6PDE3ZiL5reP8b58JLMwB+CuguMGB40bg7G1q9O2HBxMcEFf1N5b TOJPQEZ5LkkbOdO6tnF/Tq4i2di02Uay001sD1ti00AODtXI65bNCXLDfcVfJOP97QdYRV G1uqEtOJb5KsIH9VX5yBCDWxJjUQY38= 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-206-Hgu1okhiObSZaxV51CZP-Q-1; Tue, 15 Dec 2020 09:43:47 -0500 X-MC-Unique: Hgu1okhiObSZaxV51CZP-Q-1 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.phx2.redhat.com [10.5.11.23]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 11FCA107ACF5; Tue, 15 Dec 2020 14:43:46 +0000 (UTC) Received: from steredhat.redhat.com (ovpn-115-49.ams2.redhat.com [10.36.115.49]) by smtp.corp.redhat.com (Postfix) with ESMTP id 2CFEB19C44; Tue, 15 Dec 2020 14:43:36 +0000 (UTC) From: Stefano Garzarella To: virtualization@lists.linux-foundation.org Cc: Oren Duer , Laurent Vivier , Max Gurtovoy , Randy Dunlap , Shahaf Shuler , Stefan Hajnoczi , "Michael S. Tsirkin" , Eli Cohen , linux-kernel@vger.kernel.org, Stefano Garzarella , Jason Wang Subject: [PATCH v4 04/18] vdpa_sim: make IOTLB entries limit configurable Date: Tue, 15 Dec 2020 15:42:42 +0100 Message-Id: <20201215144256.155342-5-sgarzare@redhat.com> In-Reply-To: <20201215144256.155342-1-sgarzare@redhat.com> References: <20201215144256.155342-1-sgarzare@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 2.84 on 10.5.11.23 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Some devices may require a higher limit for the number of IOTLB entries, so let's make it configurable through a module parameter. By default, it's initialized with the current limit (2048). Suggested-by: Jason Wang Signed-off-by: Stefano Garzarella --- drivers/vdpa/vdpa_sim/vdpa_sim.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim.c b/drivers/vdpa/vdpa_sim/vdpa_sim.c index 07ccc8609784..d716bfaadb3b 100644 --- a/drivers/vdpa/vdpa_sim/vdpa_sim.c +++ b/drivers/vdpa/vdpa_sim/vdpa_sim.c @@ -31,6 +31,11 @@ static int batch_mapping = 1; module_param(batch_mapping, int, 0444); MODULE_PARM_DESC(batch_mapping, "Batched mapping 1 -Enable; 0 - Disable"); +static int max_iotlb_entries = 2048; +module_param(max_iotlb_entries, int, 0444); +MODULE_PARM_DESC(max_iotlb_entries, + "Maximum number of iotlb entries. 0 means unlimited. (default: 2048)"); + static char *macaddr; module_param(macaddr, charp, 0); MODULE_PARM_DESC(macaddr, "Ethernet MAC address"); @@ -371,7 +376,7 @@ static struct vdpasim *vdpasim_create(void) if (!vdpasim->vqs) goto err_iommu; - vdpasim->iommu = vhost_iotlb_alloc(2048, 0); + vdpasim->iommu = vhost_iotlb_alloc(max_iotlb_entries, 0); if (!vdpasim->iommu) goto err_iommu; -- 2.26.2