From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 8750834CC3 for ; Wed, 7 Jun 2023 21:00:29 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0CDFDC433EF; Wed, 7 Jun 2023 21:00:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1686171629; bh=W7cDmmMskAmQKOeAEBTMMtSUHQeSM063tf6xjoDLGpQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=SSutqo7GI0ITxH8Vfso1z294Y+z+Fkl63VroElgrIrOYUtkFDRdTqIdLbY3Yg2C2g /V8XcIxMam0NbdmOHF94MVhv2acqeDWD1UQkfZWYiWCFIaKsfvPgITAGGIsrbV2/B1 8mHa146SqieJS0Q8saA5yQ0ae6ja9y9ulme6oH9Y= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Rob Clark , Dmitry Baryshkov , Sasha Levin Subject: [PATCH 5.15 091/159] drm/msm: Be more shouty if per-process pgtables arent working Date: Wed, 7 Jun 2023 22:16:34 +0200 Message-ID: <20230607200906.674981193@linuxfoundation.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230607200903.652580797@linuxfoundation.org> References: <20230607200903.652580797@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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