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d=hostedemail.com; t=1720017313; a=rsa-sha256; cv=none; b=3QfHp1KKuwfiEX7ZqeM2cecdP2uN0L3GqRztgoaiCOOhJyTuCW5j2e46abI3Tkcck2pw4L pTuHhckcrx7Z9lN8fFLqFivubKeByP5rJYsqlIc7XEvtcckFgznmC0fpUn8dZwkxwMnj87 TJ2tv14A1rhY7qTD1DGwJ7aClBDBjqg= ARC-Authentication-Results: i=1; imf12.hostedemail.com; dkim=none; spf=pass (imf12.hostedemail.com: domain of hch@lst.de designates 213.95.11.211 as permitted sender) smtp.mailfrom=hch@lst.de; dmarc=none Received: by verein.lst.de (Postfix, from userid 2407) id D1D0E68AFE; Wed, 3 Jul 2024 16:35:30 +0200 (CEST) Date: Wed, 3 Jul 2024 16:35:30 +0200 From: Christoph Hellwig To: Leon Romanovsky Cc: Christoph Hellwig , 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: <20240703143530.GA30857@lst.de> References: <20240703054238.GA25366@lst.de> <20240703105253.GA95824@unreal> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20240703105253.GA95824@unreal> User-Agent: Mutt/1.5.17 (2007-11-01) X-Rspam-User: X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: 4E33040006 X-Stat-Signature: hs6bda87uo79er74kyoywsujt8qcbjpk X-HE-Tag: 1720017337-364771 X-HE-Meta: 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 BilKc/m+ GvRx0HhxfHgrPf5Fvq7sbaSzpIrajaWjAFRFXo9QNHcVOpL//p/yAUbuRtwwF+TLb0VnF2LIZurF6ieU= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Wed, Jul 03, 2024 at 01:52:53PM +0300, Leon Romanovsky wrote: > 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. qemu-system-x86_64 \ -nographic \ -enable-kvm \ -m 6g \ -smp 4 \ -cpu host \ -M q35,kernel-irqchip=split \ -kernel arch/x86/boot/bzImage \ -append "root=/dev/vda console=ttyS0,115200n8 intel_iommu=on" \ -device intel-iommu,intremap=on \ -device ioh3420,multifunction=on,bus=pcie.0,id=port9-0,addr=9.0,chassis=0 \ -blockdev driver=file,cache.direct=on,node-name=root,filename=/home/hch/images/bookworm.img \ -blockdev driver=host_device,cache.direct=on,node-name=test,filename=/dev/nvme0n1p4 \ -device virtio-blk,drive=root \ -device nvme,drive=test,serial=1234