From patchwork Sat Sep 26 13:00:01 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: AngeloGioacchino Del Regno X-Patchwork-Id: 11801373 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id CC2CB16BC for ; Sat, 26 Sep 2020 13:00:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id AC4F8221ED for ; Sat, 26 Sep 2020 13:00:30 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="GVKvSy0s" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729505AbgIZNA0 (ORCPT ); Sat, 26 Sep 2020 09:00:26 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36446 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729374AbgIZNAP (ORCPT ); Sat, 26 Sep 2020 09:00:15 -0400 Received: from mail-wr1-x442.google.com (mail-wr1-x442.google.com [IPv6:2a00:1450:4864:20::442]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 421DDC0613CE; Sat, 26 Sep 2020 06:00:15 -0700 (PDT) Received: by mail-wr1-x442.google.com with SMTP id z4so6893581wrr.4; Sat, 26 Sep 2020 06:00:15 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=0jmpuG1sG/LCfKsjazCgf9OHk0sr2fgX8L2MMSiufQc=; b=GVKvSy0sgUcoO2wR+MPkLvnJLC1JWabHJc374jpH3QNtS+OfhY6zKPZQ9y7/DUWg2t dXP6qfinI7aP9ZHV/Q0esy4mb+4RrRwh8LZzflfZXhJ8ztBASY53Buc0mfVJp0117cKO lpK+3kZfPe5kGjDw/3N6wQL7dQMROqYdr8yY8hdYXL/QzKBHbqSpkprUtarWqzg1+G6d qDM9cgm8D00Rd2gnb+hKzULNIfLZ4v4eHEAglF9eO/hf7FQFCRQGhmZgVgBfemAmzOQd D7b8FCHnlRCnNHZfUvr3f9q2XVyNA3KwYH6PyML+Rwb/D4yjC/gsmepbEL90w1t5Z/X5 Qb1g== 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:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=0jmpuG1sG/LCfKsjazCgf9OHk0sr2fgX8L2MMSiufQc=; b=IouWwKXtfvakFQm8KWfVwVay8+8X+6xRjMUqMLeam23Shj612BXFnbQK+Egs66nSR2 z2LuYVv1qujTXzvI71DvWqSELBDvz/O6MiLhzesnRgkO3z2GzuWi4IQmquq2J6rfvkJt tJZ98wrZ2+NxU0OqdQPn1rr6DqHWwvts6r4ZfuwCoWfThV7yHbzsEuDS4+6w0NsZ7Qll s4utHWfbrLPHSpERhzSj1BpOLaV6o8kOFjnwxqQj7PpoNUNOcFaA/gED2H3QakNNEyil Ip9l0p3scXR3YF7dQM7Zk5rWTai2v6rDuJph95oW+VKhtBwkxtnfuYNbID//5RUYZKec Qn/A== X-Gm-Message-State: AOAM533ly12mgzT/8/hVJ5vKSQGeaooOeCQeC8Gafan5+aCM3eaQmZ4W VXtjKck1UqR5r0TtXXRzQJetj5+AFEhK0g== X-Google-Smtp-Source: ABdhPJyIuZfQRoZQ+orDTsJ4JEDVE4SCSy84utTQYhNdRFzDilj+Ty9sQoQIxOcufdQGIoZ1ebtlGg== X-Received: by 2002:a5d:56cd:: with SMTP id m13mr9197517wrw.261.1601125213898; Sat, 26 Sep 2020 06:00:13 -0700 (PDT) Received: from IcarusMOD.eternityproject.eu ([2.237.20.237]) by smtp.gmail.com with ESMTPSA id b11sm6462896wrt.38.2020.09.26.06.00.12 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 26 Sep 2020 06:00:13 -0700 (PDT) From: kholk11@gmail.com To: will@kernel.org Cc: robin.murphy@arm.com, joro@8bytes.org, bjorn.andersson@linaro.org, linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, kholk11@gmail.com, marijns95@gmail.com, konradybcio@gmail.com, martin.botka1@gmail.com, linux-arm-msm@vger.kernel.org, phone-devel@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 5/8] iommu/arm-smmu-qcom: Add test_smr_masks detail to QCOM SMMUv2 Date: Sat, 26 Sep 2020 15:00:01 +0200 Message-Id: <20200926130004.13528-6-kholk11@gmail.com> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200926130004.13528-1-kholk11@gmail.com> References: <20200926130004.13528-1-kholk11@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org From: AngeloGioacchino Del Regno On some Qualcomm SoCs with certain hypervisor configurations, writing the streamid masks to the SMRs will trigger a hyp-fault and crash the system. This is seen on at least Qualcomm SDM630, SDM636 and SDM660. Signed-off-by: AngeloGioacchino Del Regno --- drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c b/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c index f5bbfe86ef30..b18e70bddf29 100644 --- a/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c +++ b/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c @@ -85,8 +85,21 @@ static int qcom_smmuv2_cfg_probe(struct arm_smmu_device *smmu) return 0; } +static void qcom_smmuv2_test_smr_masks(struct arm_smmu_device *smmu) +{ + /* + * Broken firmware quirk: + * On some Qualcomm SoCs with certain hypervisor configurations, + * writing the streamid masks to the SMRs will trigger a hyp-fault + * and crash the system. + */ + smmu->streamid_mask = 0x7FFF; + smmu->smr_mask_mask = 0x7FFF; +} + static const struct arm_smmu_impl qcom_smmuv2_impl = { .cfg_probe = qcom_smmuv2_cfg_probe, + .test_smr_masks = qcom_smmuv2_test_smr_masks, }; struct arm_smmu_device *qcom_smmu_impl_init(struct arm_smmu_device *smmu)