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=-9.8 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT 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 6E7FEC33CA4 for ; Fri, 10 Jan 2020 15:29:08 +0000 (UTC) Received: from hemlock.osuosl.org (smtp2.osuosl.org [140.211.166.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 44A2F20838 for ; Fri, 10 Jan 2020 15:29:08 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="kRw2ANs+" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 44A2F20838 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=iommu-bounces@lists.linux-foundation.org Received: from localhost (localhost [127.0.0.1]) by hemlock.osuosl.org (Postfix) with ESMTP id 0C85C87D63; Fri, 10 Jan 2020 15:29:08 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from hemlock.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id iXf5oKRdOAFb; Fri, 10 Jan 2020 15:29:07 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by hemlock.osuosl.org (Postfix) with ESMTP id 9802F87D76; Fri, 10 Jan 2020 15:29:07 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id 8A706C1D7D; Fri, 10 Jan 2020 15:29:07 +0000 (UTC) Received: from whitealder.osuosl.org (smtp1.osuosl.org [140.211.166.138]) by lists.linuxfoundation.org (Postfix) with ESMTP id 3B328C0881 for ; Fri, 10 Jan 2020 15:29:04 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by whitealder.osuosl.org (Postfix) with ESMTP id 3826082D5F for ; Fri, 10 Jan 2020 15:29:04 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from whitealder.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 09jT2aUMD7gg for ; Fri, 10 Jan 2020 15:29:03 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.7.6 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by whitealder.osuosl.org (Postfix) with ESMTPS id C72DA81E5E for ; Fri, 10 Jan 2020 15:29:03 +0000 (UTC) Received: from localhost.localdomain (236.31.169.217.in-addr.arpa [217.169.31.236]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 7398A2082E; Fri, 10 Jan 2020 15:29:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1578670143; bh=WdNwMexkPV2ze5lGJ306FvJuZTOCE1fFYBtTnKvVsxc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=kRw2ANs+mELhK95I5zvuJVCnWVpW4DkCb0IPWkWCXHF+51M3VBh/NOJeb9roRwUZF mwzJf7xKTpylH7PUypG0ctOSfbf0CerHi3mbzQjshQqRyDB5W///f/FE/AIgUK1rM3 mByl6iAvb74IDF3cbFbWxsdRebMIhhal3XrVJbHs= From: Will Deacon To: iommu@lists.linux-foundation.org Subject: [PATCH 4/8] iommu/io-pgtable-arm: Ensure ARM_64_LPAE_S2_TCR_RES1 is unsigned Date: Fri, 10 Jan 2020 15:28:48 +0000 Message-Id: <20200110152852.24259-5-will@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200110152852.24259-1-will@kernel.org> References: <20200110152852.24259-1-will@kernel.org> MIME-Version: 1.0 Cc: Will Deacon , kernel-team@android.com, Robin Murphy , linux-arm-kernel@lists.infradead.org X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" ARM_64_LPAE_S2_TCR_RES1 is intended to map to bit 31 of the VTCR register, which is required to be set to 1 by the architecture. Unfortunately, we accidentally treat this as a signed quantity which means we also set the upper 32 bits of the VTCR to one, and they are required to be zero. Treat ARM_64_LPAE_S2_TCR_RES1 as unsigned to avoid the unwanted sign-extension up to 64 bits. Cc: Robin Murphy Signed-off-by: Will Deacon --- drivers/iommu/io-pgtable-arm.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/iommu/io-pgtable-arm.c b/drivers/iommu/io-pgtable-arm.c index 4b437ead2300..89216bf37282 100644 --- a/drivers/iommu/io-pgtable-arm.c +++ b/drivers/iommu/io-pgtable-arm.c @@ -101,7 +101,7 @@ /* Register bits */ #define ARM_32_LPAE_TCR_EAE (1 << 31) -#define ARM_64_LPAE_S2_TCR_RES1 (1 << 31) +#define ARM_64_LPAE_S2_TCR_RES1 (1U << 31) #define ARM_LPAE_TCR_EPD1 (1 << 23) -- 2.25.0.rc1.283.g88dfdc4193-goog _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu