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 7CB9717E8EE; Wed, 3 Jul 2024 10:52:58 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1720003978; cv=none; b=YOFF6x3j98aXgJyBC4HChTdc6evgc8WhOvRQvU0db/P30oRMVqi096cBcm9ulaW/bnxL5jdp7RFlbgopCe0eK0IWQa14ImB+pRu+TVv2GnfL+n6X5XQFGHfA3LtP/Ng2xJZ/XF6ShlHi8Ths8pwxfQEN9JKXEXOdFdYt5huy/Dc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1720003978; c=relaxed/simple; bh=pPz+aKLXZOghQ7VtjQHusi+fj+NpFq4VHkcVX8X3bH8=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=Olzs6C01dW/uyLIQV4DMxyTT65UVUaSAuBCPjmND+aZomXLHdK94+hCxwYIXM99Yw0R4Qz+NnZKoTGZ5NQxAhAgeedsVEDSEKiZ8eAp2XgRnLKPZqDnCS55f/vFlpcPNX6XR4KUQ3tMKdhbw9PBrFRMCDsLP0dT9y0j3qfLuxY4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=nYd4RQLP; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="nYd4RQLP" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 836CAC4AF0B; Wed, 3 Jul 2024 10:52:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1720003978; bh=pPz+aKLXZOghQ7VtjQHusi+fj+NpFq4VHkcVX8X3bH8=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=nYd4RQLPNWY78pIbNAILafDzME2V0q1JxD04RIMzYEVRTvt89jlLKvJriZcMCuH2T w96uRRv/Q4LrMA7qbS+tVVzGZ8TbYD4a7uxMEPOOXtyhfAZjqiLtWvl7qwC+YZD5Ba v6Hluy8LaijXySSMoswEpGvrCLN3gkwpFP2bG31B2uIuuhMWFdHvJ6hmi9njK5bywp geNwo4OuHZBuA495qG+lQBMrzBgxPLYgn8KinCmvDBq9hmAZenc9g0C6DeVOsibSX2 IVVgir3Al85xqpIrwp6ua76xZvzC0FWDuHMKCBDh5k2QhOV31v4/Nqa/LhITpDNtHG 1wsaj+G6o4oiw== Date: Wed, 3 Jul 2024 13:52:53 +0300 From: Leon Romanovsky To: Christoph Hellwig Cc: Jens Axboe , Jason Gunthorpe , Robin Murphy , Joerg Roedel , Will Deacon , Keith Busch , "Zeng, Oak" , Chaitanya Kulkarni , Sagi Grimberg , Bjorn Helgaas , Logan Gunthorpe , Yishai Hadas , Shameer Kolothum , Kevin Tian , Alex Williamson , Marek Szyprowski , =?iso-8859-1?B?Suly9G1l?= Glisse , Andrew Morton , linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org, iommu@lists.linux.dev, linux-nvme@lists.infradead.org, linux-pci@vger.kernel.org, kvm@vger.kernel.org, linux-mm@kvack.org Subject: Re: [RFC PATCH v1 00/18] Provide a new two step DMA API mapping API Message-ID: <20240703105253.GA95824@unreal> References: <20240703054238.GA25366@lst.de> Precedence: bulk X-Mailing-List: linux-pci@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20240703054238.GA25366@lst.de> On Wed, Jul 03, 2024 at 07:42:38AM +0200, Christoph Hellwig wrote: > I just tried to boot this on my usual qemu test setup with emulated > nvme devices, and it dead-loops with messages like this fairly late > in the boot cycle: > > [ 43.826627] iommu: unaligned: iova 0xfff7e000 pa 0x000000010be33650 size 0x1000 min_pagesz 0x1000 > [ 43.826982] dma_mapping_error -12 > > passing intel_iommu=off instead of intel_iommu=on (expectedly) makes > it go away. Can you please share your kernel command line and qemu? On my and Chaitanya setups it works fine. Thanks