Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752788AbdCHLKy (ORCPT ); Wed, 8 Mar 2017 06:10:54 -0500 Received: from mail-pf0-f194.google.com ([209.85.192.194]:34317 "EHLO mail-pf0-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750745AbdCHLKt (ORCPT ); Wed, 8 Mar 2017 06:10:49 -0500 From: Magnus Damm To: joro@8bytes.org Cc: laurent.pinchart+renesas@ideasonboard.com, geert+renesas@glider.be, linux-kernel@vger.kernel.org, linux-renesas-soc@vger.kernel.org, iommu@lists.linux-foundation.org, horms+renesas@verge.net.au, Magnus Damm , robin.murphy@arm.com, m.szyprowski@samsung.com Date: Wed, 08 Mar 2017 20:02:33 +0900 Message-Id: <148897095343.16106.17126859556338057136.sendpatchset@little-apple> In-Reply-To: <148897088333.16106.13237004440297956899.sendpatchset@little-apple> References: <148897088333.16106.13237004440297956899.sendpatchset@little-apple> Subject: [PATCH v3 07/09] iommu/ipmmu-vmsa: Make IMBUSCTR setup optional Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1441 Lines: 51 From: Magnus Damm Introduce a feature to allow opt-out of setting up IMBUSCR. The default case is unchanged. Signed-off-by: Magnus Damm --- Changes since V2: - None Changes since V1: - Updated the commit message - Reworked patch to coexist with the multi context feature drivers/iommu/ipmmu-vmsa.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) --- 0020/drivers/iommu/ipmmu-vmsa.c +++ work/drivers/iommu/ipmmu-vmsa.c 2017-03-08 18:32:26.280607110 +0900 @@ -37,6 +37,7 @@ struct ipmmu_features { bool use_ns_alias_offset; bool has_cache_leaf_nodes; bool has_eight_ctx; + bool setup_imbuscr; }; struct ipmmu_vmsa_device { @@ -465,10 +466,10 @@ static int ipmmu_domain_init_context(str ipmmu_ctx_write(domain, IMMAIR0, domain->cfg.arm_lpae_s1_cfg.mair[0]); /* IMBUSCR */ - ipmmu_ctx_write(domain, IMBUSCR, - ipmmu_ctx_read(domain, IMBUSCR) & - ~(IMBUSCR_DVM | IMBUSCR_BUSSEL_MASK)); - + if (domain->root->features->setup_imbuscr) + ipmmu_ctx_write(domain, IMBUSCR, + ipmmu_ctx_read(domain, IMBUSCR) & + ~(IMBUSCR_DVM | IMBUSCR_BUSSEL_MASK)); /* * IMSTR * Clear all interrupt flags. @@ -1078,6 +1079,7 @@ static const struct ipmmu_features ipmmu .use_ns_alias_offset = true, .has_cache_leaf_nodes = false, .has_eight_ctx = false, + .setup_imbuscr = true, }; static const struct of_device_id ipmmu_of_ids[] = {