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=-3.9 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY,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 8774AC43381 for ; Tue, 19 Mar 2019 13:24:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4B93420854 for ; Tue, 19 Mar 2019 13:24:10 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="bdUBWFrN" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726703AbfCSNYJ (ORCPT ); Tue, 19 Mar 2019 09:24:09 -0400 Received: from mail-pf1-f195.google.com ([209.85.210.195]:41235 "EHLO mail-pf1-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725951AbfCSNYJ (ORCPT ); Tue, 19 Mar 2019 09:24:09 -0400 Received: by mail-pf1-f195.google.com with SMTP id d25so13667402pfn.8 for ; Tue, 19 Mar 2019 06:24:09 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:date:message-id:subject; bh=wgE6POHDApIyk0+fujEYsA2TuoICXUlRWT+QmvrMjO4=; b=bdUBWFrNsbDaGAKulzPKDowfgjDcjl14XJBDVGCKAcr4XyAYBJQG4xZ+7vAIroo4HB DpDzQCPFCF6Rh2Jg70HWuaSKTGPgIbUnF93RHC5kfx9AXy/91+9PLSRNqN/QhUqhqihL ZSjxqlFJU5KbUWnAoUN1UXEHKZX55HyXufQGqU5Gn3i2XItQOKJzgOh1XRmTYCY+YQw7 uRbGloEae37R5H05Ux0YaVSHi0qwOPzxptagSesUltON8gUGL9tuSi/UYStsTvttgvAX PmiLj887y7FUiiN7617UHR16eZ7m7vGCWxXti6YT80NwMrLuqe7yZ0PzCgesH8GanTcM lh2Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:date:message-id:subject; bh=wgE6POHDApIyk0+fujEYsA2TuoICXUlRWT+QmvrMjO4=; b=S1prbIyW4++hIsaezpCsIBQ9NM0SJkDZiHbFXsoNUahH6yzZ5FF11AAHzyTxlEknZg eKRzNYD113exiOJu4YLqVxjjHlm0NJAS4u/MZ3eK6Yiwd9tfeP+Pl1kyW+EjlmULLhxJ XuyWZXNXBZTCSzpy5M79ovwN0x9BJczcrs0kOive7YzAFh4oPejjKeXJYLrrVWGo7r2u O8Loz4qWSCbTJvmQw1wleMEX180XxmXOEcAng++ZYVnz9mkdCamS0sqa2ZvS1aDBeDro lLuX76m151Y7mqQhKOjPx02d0j1mGaXKzxr3gxoutoiJ72g7CQ/DT7+tBeVVbVEvIX/9 otZw== X-Gm-Message-State: APjAAAVOLVKDL3Puv2D5iEgxd9Jq7auUXuqHOJdC3ZIB6vKQSzdIJ5EH XnJjZeisK/Mql4rdpP5TbMzhNr6RsQE= X-Google-Smtp-Source: APXvYqxML7UDaKxivocXrEVMyYhs8LqUprzf/6pno5wNhIJUPWDWNHTq1dXNDeixw2/HwUJLCJFSxQ== X-Received: by 2002:a63:da43:: with SMTP id l3mr1858684pgj.164.1553001848635; Tue, 19 Mar 2019 06:24:08 -0700 (PDT) Received: from [127.0.0.1] (s214090.ppp.asahi-net.or.jp. [220.157.214.90]) by smtp.gmail.com with ESMTPSA id x1sm21128528pge.73.2019.03.19.06.24.06 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 19 Mar 2019 06:24:07 -0700 (PDT) From: Magnus Damm To: linux-renesas-soc@vger.kernel.org Cc: Magnus Damm Date: Tue, 19 Mar 2019 22:25:08 +0900 Message-Id: <155300190865.2469.7364392263486575447.sendpatchset@octo> Subject: [PATCH/RFC V2] iommu/ipmmu-vmsa: Disable IPMMU when address expansion is not needed Sender: linux-renesas-soc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-renesas-soc@vger.kernel.org From: Magnus Damm Add a memory bank location check to the whitelist handling. Signed-off-by: Magnus Damm --- Changes since V1: - None, simply broke out this patch from the rest of the series drivers/iommu/ipmmu-vmsa.c | 7 +++++++ 1 file changed, 7 insertions(+) --- 0001/drivers/iommu/ipmmu-vmsa.c +++ work/drivers/iommu/ipmmu-vmsa.c 2019-03-19 21:04:43.000000000 +0900 @@ -17,6 +17,7 @@ #include #include #include +#include #include #include #include @@ -797,6 +798,12 @@ static bool ipmmu_slave_whitelist(struct if (!soc_device_match(soc_rcar_gen3_whitelist)) return false; + /* In case all system memory fits within 32 bits of physical space + * then assume the IPMMU will not be needed for address expansion. + */ + if (memblock_end_of_DRAM() <= SZ_4G) + return false; + /* Check whether this slave device can work with the IPMMU */ for (i = 0; i < ARRAY_SIZE(rcar_gen3_slave_whitelist); i++) { if (!strcmp(dev_name(dev), rcar_gen3_slave_whitelist[i]))