From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-qv1-f48.google.com (mail-qv1-f48.google.com [209.85.219.48]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7376F35962 for ; Sat, 1 Mar 2025 00:32:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.219.48 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1740789125; cv=none; b=WGw/BLbrRIL5ad0j7ARzwgvjDnsqxpOEkog7XnL1VbuHK8bUSa6ESTdOOW1NZMCheqjPBkBV3hhRi9aQGRUR3pPOkiTpUwCYAQR2nE1pt0+9xoG3Humsswkivu/wLxucPPheSB9nakBeC8udVDPs9cd8D5ib78/O0afSbLJoKQg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1740789125; c=relaxed/simple; bh=IJ/uAZ1nD5RItLsU4XWErABvAF+S58BRfovN898A/9A=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=D7fVpZF/fNlvScwSUTPCZ3G9bu4FBuFnPZbFlc/2bWcznzd/2e0fpkMJwa+UPTfII5tMkqQNaopvkyR45gR4B/NBxOZT/s3kBpp7x5g4WvM3HR8yyLTE8MjDGolI4J3WzxsFCuEZbBG8cR9P8/406niHkYYNLl1L912YK58m93A= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=ziepe.ca; spf=pass smtp.mailfrom=ziepe.ca; dkim=pass (2048-bit key) header.d=ziepe.ca header.i=@ziepe.ca header.b=MOakwd4c; arc=none smtp.client-ip=209.85.219.48 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=ziepe.ca Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=ziepe.ca Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=ziepe.ca header.i=@ziepe.ca header.b="MOakwd4c" Received: by mail-qv1-f48.google.com with SMTP id 6a1803df08f44-6e895f3365aso20692476d6.0 for ; Fri, 28 Feb 2025 16:32:03 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ziepe.ca; s=google; t=1740789122; x=1741393922; darn=lists.linux.dev; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:from:to:cc:subject:date:message-id:reply-to; bh=UGmZpux3eW+jxhKZP1ofv0c4XveJW25IwmZp9EBvmdU=; b=MOakwd4cgGeXPC61qMdvCd0RHYM/5MW9FHDaZwK4MiFd8I5Oi8fJksZ0gs7XreIb1I GajcsfZmTmijAt/6vjMEY8MnU2wiK83fWD8sE0IxYZYfoFyh+LDMAST30ituyGExUuf/ F7TB1irSNCc8B1/FXVasmEu+rlbvW8RSx8/O//jkS76TnejCFGZgn0LMZASRjyIS1mL+ L+cFgXTYafDo7Pnhwo5jmZiH/vrOLhNFMZQW/3nqp/tOTlWlaFA4lAoAS7bTK+9zyc3E cqFbyIRPBsaYpjbl9KdXeUSbjcYyfauwnGzA5e77I9AEMp698cx+PO3of5/ZgahYxrcc DXrg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1740789122; x=1741393922; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=UGmZpux3eW+jxhKZP1ofv0c4XveJW25IwmZp9EBvmdU=; b=L4ZBcbZKjsf358KCk09kKVWtsZYG3jJeLnQQ/aZwjAGlsiOnwwrpykuqALGtLfV09s OvBYelNmAannTQUv1KFE2lUzXj5MXZHzcUF5yUCwCwLDnJmCHp29aDwyL3twtTITDTio CT0mpfcFLbBNBtDxeln12NrDRX6PxD7zZzezQP5adg4Ezl4eoKhe8TO+HQCJhdUiGci2 ocsvSZ3pP2Z7Nm5IP1D6PEdJDlhDRSxxfGs45DqvfIEXbclnA2qQe2y/JmBWnffRUp9E oY0GE73n0jM6lO6OrZOiaWgDQRoEJVGUNvS5g18upuD9DW2GgKWdNYLANL1HPurgNBFe +URw== X-Forwarded-Encrypted: i=1; AJvYcCXSOE5mNTJh3dTd1Zusky7c3qu0ciIiZ1nRpjHpPYnSqrUOm9YYM0s+/y0kv/gMtnOgOoZ1SA==@lists.linux.dev X-Gm-Message-State: AOJu0YyUWayOCtq9awINaF+M7sVCJbzfj2/WMBK1bhO4NcUbj0VCEVvm KvgVj+/5lV4YrQganFmR3tyvZxn8JetINslUsWDFRzujZXtkIBP1R6e+85j0U9s= X-Gm-Gg: ASbGncvycYl433aaiVUDAyDjmM5F/xfoSrtn2+OsqqT4wHAJ9kfM1x+F2Bj3G9n3OJO sFMC1WGWQYjuKjlTMLSpijJw6YplQsE+Ur3P/61zjsi7jICkDOfHhoVeAb5wnAmamUC6m2GreCm mFeQuf3+6oqkhdtcCGzc4iuT2oh21OD5Dklp/j1xDcCr/8NY5X96Eiih+Zw52MC1O4ziBL1orf4 T5dDk5I2pLLTvthJXLoNcBOE9b6uLJSNxgAlnEjbxFWvT3vPbx4EA5CkRunaHYbIfw9a9VG4Ag5 iN6F/z0x2srCq9Rw7srzge0QjPh1JlUOrTYaAA12jZsKDVhVvgwScKZT/Elvo9BVS2JW1f+hVM1 IymNlrsW6/yYbbYczTg== X-Google-Smtp-Source: AGHT+IGisC/6wMYSFfGCwksz3Hqk310E6+QHChS9Lt2rzSb1IaRmOie8VRdlWltqdIKsz9jGOQcrlw== X-Received: by 2002:a05:6214:2586:b0:6e6:617c:abb6 with SMTP id 6a1803df08f44-6e8a0cd3b06mr68816196d6.6.1740789122305; Fri, 28 Feb 2025 16:32:02 -0800 (PST) Received: from ziepe.ca (hlfxns017vw-142-68-128-5.dhcp-dynamic.fibreop.ns.bellaliant.net. [142.68.128.5]) by smtp.gmail.com with ESMTPSA id 6a1803df08f44-6e897652066sm27657806d6.30.2025.02.28.16.32.01 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 28 Feb 2025 16:32:01 -0800 (PST) Received: from jgg by wakko with local (Exim 4.97) (envelope-from ) id 1toAls-00000000VPg-3Ini; Fri, 28 Feb 2025 20:32:00 -0400 Date: Fri, 28 Feb 2025 20:32:00 -0400 From: Jason Gunthorpe To: Alexey Kardashevskiy Cc: Xu Yilun , x86@kernel.org, kvm@vger.kernel.org, linux-crypto@vger.kernel.org, linux-pci@vger.kernel.org, linux-arch@vger.kernel.org, Sean Christopherson , Paolo Bonzini , Tom Lendacky , Ashish Kalra , Joerg Roedel , Suravee Suthikulpanit , Robin Murphy , Kevin Tian , Bjorn Helgaas , Dan Williams , Christoph Hellwig , Nikunj A Dadhania , Michael Roth , Vasant Hegde , Joao Martins , Nicolin Chen , Lu Baolu , Steve Sistare , Lukas Wunner , Jonathan Cameron , Suzuki K Poulose , Dionna Glaze , Yi Liu , iommu@lists.linux.dev, linux-coco@lists.linux.dev, Zhi Wang , "Aneesh Kumar K . V" Subject: Re: [RFC PATCH v2 14/22] iommufd: Add TIO calls Message-ID: <20250301003200.GQ5011@ziepe.ca> References: <20250218111017.491719-1-aik@amd.com> <20250218111017.491719-15-aik@amd.com> <2fe6b3c6-3eed-424d-87f0-34c4e7e1c906@amd.com> <20250226131202.GH5011@ziepe.ca> <433217be-55e3-477b-bc10-cf81f02ab21e@amd.com> Precedence: bulk X-Mailing-List: iommu@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <433217be-55e3-477b-bc10-cf81f02ab21e@amd.com> On Thu, Feb 27, 2025 at 11:33:31AM +1100, Alexey Kardashevskiy wrote: > > > On 27/2/25 00:12, Jason Gunthorpe wrote: > > On Wed, Feb 26, 2025 at 06:49:18PM +0800, Xu Yilun wrote: > > > > > E.g. I don't think VFIO driver would expect its MMIO access suddenly > > > failed without knowing what happened. > > > > What do people expect to happen here anyhow? Do you still intend to > > mmap any of the MMIO into the hypervisor? No, right? It is all locked > > down? > > This patchset expects it to be mmap'able as this is how MMIO gets mapped in > the NPT and SEV-SNP still works with that (and updates the RMPs on top), the > host os is not expected to access these though. TDX will handle this somehow > different. Thanks, I'm expecting you'll wrap that in a FD, since iommufd will not be accessing MMIO through mmaps. Jason