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 lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id AF860FF6E95 for ; Tue, 17 Mar 2026 22:41:29 +0000 (UTC) Received: from boromir.ozlabs.org (localhost [127.0.0.1]) by lists.ozlabs.org (Postfix) with ESMTP id 4fb6Pz6fjWz2ygK; Wed, 18 Mar 2026 09:41:27 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; arc=none smtp.remote-ip=185.67.36.66 ARC-Seal: i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707; t=1773787287; cv=none; b=CbBSfCQ7XxywOb+qREdc1HKjlVZh8ULpepJyYRr4AHW/T6A4eHHuH14UeY0cPmNqJ7HFwdGrlGastpZUpJoYTkUvP5A115l8/wJUlTg8rdANPWN33xAHFLd/IAK+GbfpynLDmRjT9S7WgclhQ4VvD+PRQQwGH60mJtorfBWpRJOaghj3oZvRbza+97MjEFK95FOykVOjCEsTYkcHnQke+qHqOwvtM3OHIDdr6hbrwrs2f5EnE99CRIPsNVwdC93HIEMIeW1YcyhTazu4mx5OVvfwQTwYtdDhr2hFZYge94aBiixEkBs5z67nJrTc0FvXmhojq3mikYFp5qgLnFDsgw== ARC-Message-Signature: i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707; t=1773787287; c=relaxed/relaxed; bh=8oBmF4DPhKwbg+7vhSOziw0ETGItzql/tzkq13a9Mrw=; h=Message-ID:Date:MIME-Version:To:References:Subject:From: In-Reply-To:Content-Type; b=VM8xT3mxOZNJNq0WT2OVX/IlXUWovayauChhq4kqs5GYDeJN2EqFWwDcr9lJgq5kJB94/bOk9ngjeCyXxQoeiROASVBZ9scp3G+eXoqbl1gcdIk30yMkJX3f7aWvya2xZ9ae/p7cl9qpdwUBnzQ2WxN0qH+g8WuixnLdBfHZUnbMCKzm9E/qXq++JkiTRwWLL2KhxHKUQQR0uQ4SjhkFp9KDKPRMx7DG022pzeMBVYZwfFGNeDE84ZYjvmZNpFX63vYI+2NCiwrBM/0v+Rmmz34l+/KEdb/K029ttS8VklbGFfH2BDPlZnumxLVb41s/bsIRuXGJTfGdAebZMUy87w== ARC-Authentication-Results: i=1; lists.ozlabs.org; dmarc=pass (p=none dis=none) header.from=posteo.de; dkim=pass (2048-bit key; secure) header.d=posteo.de header.i=@posteo.de header.a=rsa-sha256 header.s=2017 header.b=pDABxx2y; dkim-atps=neutral; spf=pass (client-ip=185.67.36.66; helo=mout02.posteo.de; envelope-from=schimanek@posteo.de; receiver=lists.ozlabs.org) smtp.mailfrom=posteo.de Authentication-Results: lists.ozlabs.org; dmarc=pass (p=none dis=none) header.from=posteo.de Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; secure) header.d=posteo.de header.i=@posteo.de header.a=rsa-sha256 header.s=2017 header.b=pDABxx2y; dkim-atps=neutral Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=posteo.de (client-ip=185.67.36.66; helo=mout02.posteo.de; envelope-from=schimanek@posteo.de; receiver=lists.ozlabs.org) X-Greylist: delayed 393 seconds by postgrey-1.37 at boromir; Wed, 18 Mar 2026 09:41:24 AEDT Received: from mout02.posteo.de (mout02.posteo.de [185.67.36.66]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange x25519) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4fb6Pw666rz2ygG for ; Wed, 18 Mar 2026 09:41:22 +1100 (AEDT) Received: from submission (posteo.de [185.67.36.169]) by mout02.posteo.de (Postfix) with ESMTPS id 7AD10240101 for ; Tue, 17 Mar 2026 23:34:43 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=posteo.de; s=2017; t=1773786884; bh=8oBmF4DPhKwbg+7vhSOziw0ETGItzql/tzkq13a9Mrw=; h=Message-ID:Date:MIME-Version:To:Subject:From:Content-Type: Content-Transfer-Encoding:From; b=pDABxx2yxkazTduMlNVYpRHSj3Q/9RYtPZdFSavnY17vb3xNC0Ff5nfTlJfnlqaoa aTB8vtjgmS38/auKmVSp1dxIDSyySjJ66tGJkklvgh2GR2o6iRLtXjjsabSon5Ptao cdevelNhntsDbf91JlEZA7JeFysfUNFNc91ucBZjkRMV+bgljtK+gRtBOy/yssVwGI vMVlNv4bGrIsippAiF3ryhGM02psCuikuaDXivRR6V3CXQOg8IaWG76IFAwpbUSLLW 8D548Qtgv0Vc4wi50Qrl6YsbcaX0sgp5y4t20F3hjybwbqvh7UCz7n0z6sz6MsTBHn 2HEUttUvivYtQ== Received: from customer (localhost [127.0.0.1]) by submission (posteo.de) with ESMTPSA id 4fb6GC494Xz9rxP for ; Tue, 17 Mar 2026 23:34:43 +0100 (CET) Message-ID: <4d28b579-52a8-44d7-a15b-2daee20bfa8a@posteo.de> Date: Tue, 17 Mar 2026 22:34:43 +0000 X-Mailing-List: linuxppc-dev@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Archive: , List-Subscribe: , , List-Unsubscribe: Precedence: list MIME-Version: 1.0 To: linuxppc-dev@lists.ozlabs.org References: Subject: Re: amdgpu driver fails to initialize on ppc64le in 7.0-rc1 and newer From: Karl Schimanek In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Hi Ritesh, Dan, I can reproduce the issue on my system running Chimera Linux with 4K page size. System details: - Machine: RaptorCS Blackbird (POWER9, PowerNV) - GPU: Sapphire Pulse Radeon RX 5500 XT (Navi 14) - Kernel: 7.0-rc1 The failure is identical, ending in: > amdgpu ... (-12) failed to allocate kernel bo > amdgpu ... amdgpu_device_wb_init failed -12 > amdgpu ... Fatal error during GPU init I also see: > iommu: 64-bit OK but direct DMA is limited by 0 > dma_iommu_get_required_mask: returning bypass mask 0xfffffffffffffff This is with 4K pages, so it does not seem to be limited to 64K page configurations. Regards, Karl