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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id BEE8DC7EE29 for ; Thu, 25 May 2023 18:48:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S242902AbjEYSs1 (ORCPT ); Thu, 25 May 2023 14:48:27 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35214 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S242774AbjEYSpZ (ORCPT ); Thu, 25 May 2023 14:45:25 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id AC5E93A85; Thu, 25 May 2023 11:41:31 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 0D0B460BEC; Thu, 25 May 2023 18:40:50 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1D328C4339C; Thu, 25 May 2023 18:40:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1685040049; bh=W7cDmmMskAmQKOeAEBTMMtSUHQeSM063tf6xjoDLGpQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=JzdcfOid6x06z3HWw0UZSqWfBnF9mBZniu74xxl/AA4m+Fi4tTfK7j8Rju1STJQQb vYZDro03Yp/QrC15CyeSo4/OXpQU/yipCBS/jCbWy8bnbT7Ea4yXooMmJC4qJRa3Gk nBnzeIHHfkRX+ShOMU7CJ2151T38XJtCy3BeixHE0M42nY1v4tzWPrNNu02sMpSUbf qzXaFz90GIkMVkyz50mAYuyJRLhxJxkbWZy2o8s0xdeBlHTnV7EybcL8pToSlV4xiV 5DDeoi2mxvwojtAFJdpzRR5N/SGiXC5kLxnv8aRgeYYOJkImK5G93O00A8worZTO06 HOJYIEimdNJhw== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Rob Clark , Dmitry Baryshkov , Sasha Levin , robdclark@gmail.com, quic_abhinavk@quicinc.com, airlied@gmail.com, daniel@ffwll.ch, linux-arm-msm@vger.kernel.org, dri-devel@lists.freedesktop.org, freedreno@lists.freedesktop.org Subject: [PATCH AUTOSEL 5.15 39/43] drm/msm: Be more shouty if per-process pgtables aren't working Date: Thu, 25 May 2023 14:38:50 -0400 Message-Id: <20230525183854.1855431-39-sashal@kernel.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230525183854.1855431-1-sashal@kernel.org> References: <20230525183854.1855431-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Rob Clark [ Upstream commit 5c054db54c43a5fcb5cc81012361f5e3fac37637 ] Otherwise it is not always obvious if a dt or iommu change is causing us to fall back to global pgtable. Signed-off-by: Rob Clark Reviewed-by: Dmitry Baryshkov Patchwork: https://patchwork.freedesktop.org/patch/537359/ Link: https://lore.kernel.org/r/20230516222039.907690-2-robdclark@gmail.com Signed-off-by: Sasha Levin --- drivers/gpu/drm/msm/msm_iommu.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/msm/msm_iommu.c b/drivers/gpu/drm/msm/msm_iommu.c index a54ed354578b5..ef4da3f0cd22d 100644 --- a/drivers/gpu/drm/msm/msm_iommu.c +++ b/drivers/gpu/drm/msm/msm_iommu.c @@ -157,7 +157,12 @@ struct msm_mmu *msm_iommu_pagetable_create(struct msm_mmu *parent) /* Get the pagetable configuration from the domain */ if (adreno_smmu->cookie) ttbr1_cfg = adreno_smmu->get_ttbr1_cfg(adreno_smmu->cookie); - if (!ttbr1_cfg) + + /* + * If you hit this WARN_ONCE() you are probably missing an entry in + * qcom_smmu_impl_of_match[] in arm-smmu-qcom.c + */ + if (WARN_ONCE(!ttbr1_cfg, "No per-process page tables")) return ERR_PTR(-ENODEV); /* -- 2.39.2