From patchwork Sat Jan 9 13:46:11 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: AngeloGioacchino Del Regno X-Patchwork-Id: 359795 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=-16.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, 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 ADD8BC4321A for ; Sat, 9 Jan 2021 13:47:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8B2C32388B for ; Sat, 9 Jan 2021 13:47:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726108AbhAINrN (ORCPT ); Sat, 9 Jan 2021 08:47:13 -0500 Received: from relay05.th.seeweb.it ([5.144.164.166]:36435 "EHLO relay05.th.seeweb.it" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725854AbhAINrD (ORCPT ); Sat, 9 Jan 2021 08:47:03 -0500 Received: from IcarusMOD.eternityproject.eu (unknown [2.237.20.237]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by m-r2.th.seeweb.it (Postfix) with ESMTPSA id D98953EEBD; Sat, 9 Jan 2021 14:46:20 +0100 (CET) From: AngeloGioacchino Del Regno To: linux-arm-msm@vger.kernel.org Cc: konrad.dybcio@somainline.org, marijn.suijten@somainline.org, martin.botka@somainline.org, phone-devel@vger.kernel.org, linux-kernel@vger.kernel.org, agross@kernel.org, bjorn.andersson@linaro.org, mturquette@baylibre.com, sboyd@kernel.org, robh+dt@kernel.org, linux-clk@vger.kernel.org, devicetree@vger.kernel.org, AngeloGioacchino Del Regno Subject: [PATCH 3/9] clk: qcom: gcc-msm8998: Mark gpu_cfg_ahb_clk as critical Date: Sat, 9 Jan 2021 14:46:11 +0100 Message-Id: <20210109134617.146275-4-angelogioacchino.delregno@somainline.org> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20210109134617.146275-1-angelogioacchino.delregno@somainline.org> References: <20210109134617.146275-1-angelogioacchino.delregno@somainline.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org The GPU IOMMU depends on this clock and the hypervisor will crash the SoC if this clock gets disabled because the secure contexts that have been set on this IOMMU by the bootloader will become unaccessible (or they get reset). Mark this clock as critical to avoid this issue when the Adreno GPU is enabled. Signed-off-by: AngeloGioacchino Del Regno --- drivers/clk/qcom/gcc-msm8998.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/clk/qcom/gcc-msm8998.c b/drivers/clk/qcom/gcc-msm8998.c index c8d4c0348952..afea60a3ef43 100644 --- a/drivers/clk/qcom/gcc-msm8998.c +++ b/drivers/clk/qcom/gcc-msm8998.c @@ -2081,6 +2081,12 @@ static struct clk_branch gcc_gpu_cfg_ahb_clk = { .hw.init = &(struct clk_init_data){ .name = "gcc_gpu_cfg_ahb_clk", .ops = &clk_branch2_ops, + /* + * The GPU IOMMU depends on this clock and hypervisor + * will crash the SoC if this clock goes down, due to + * secure contexts protection. + */ + .flags = CLK_IS_CRITICAL, }, }, };