From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mx0b-001b2d01.pphosted.com (mx0b-001b2d01.pphosted.com [148.163.158.5]) (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 81AFE202F6D; Wed, 12 Feb 2025 21:34:35 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=148.163.158.5 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1739396078; cv=none; b=DgVaqxvkBEt5IQrxT/Z3r2NnThjVY9X2HbHkFY0LlapH3fcHZmpQlAJpTMAuyx9DL8zFIcBtiiIjwWuhp2DIjlqyP7wVnvMXZGndeCJYygy9CqsSMoiFw0c06O1pin2gzXeLIyYqxOYpufdOTZcXAWm8v5w8QUBtC6ICkoQo1ao= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1739396078; c=relaxed/simple; bh=fzERoalNNXp/hmizWvEuDSArp4eamDZD6SV8xLCFnvg=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=mFM+96PsKhIqc+S2/J5kfl+hBUcA4SHAE121MPPIbL1MKAGZaq/0M/MsBKVEGODcbPcwyTBJzjxbJxGlpk+n4NxsnpIoeV5cDvlsPIxyzFWgAqBQRAFiRIF+YkQ2T+Y55FCIwmVtXAbfSGyB4zB5FeeBBF3EWwt6hOCXRHwYXDo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.ibm.com; spf=pass smtp.mailfrom=linux.ibm.com; dkim=pass (2048-bit key) header.d=ibm.com header.i=@ibm.com header.b=qtDmKaS/; arc=none smtp.client-ip=148.163.158.5 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.ibm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.ibm.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=ibm.com header.i=@ibm.com header.b="qtDmKaS/" Received: from pps.filterd (m0353725.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 51CKGGfx030209; Wed, 12 Feb 2025 21:34:22 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=cc :content-transfer-encoding:date:from:message-id:mime-version :subject:to; s=pp1; bh=MgBTRAm2qlJPQpFVXIko132bunUaVhteRudWPVi7E cQ=; b=qtDmKaS/QND1FLaq2CHccAYvt3EpqeaIgNcG+ds+rjYnrZyPBJlclhtgN 7NQmFI121Ig3lwz/olAaLxevcBsK1OW/I9ELZk914nr31sXuYOdONzT69/lFt4e2 QymGUS6zsQsbopPgvxZmCAC4qhiwzSLoQex6YJuphBgfK+jh4iivVOm9LMVzQcij /gcyQL7vM30VHoI8yn0h6t6ghVIyjomDuEJxZaMExIIcNFnpNTFV5uW16D+TPhGU CAZlnWIVrzRpwmR4ILuSEO/m9yOr9llT8RKUftLchyHAq4piyxAg3o+LSKnf5H89 TDJKVNiLWWlxY2Xd6xUEbbdU2mSCQ== Received: from ppma22.wdc07v.mail.ibm.com (5c.69.3da9.ip4.static.sl-reverse.com [169.61.105.92]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 44rjfywmnd-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 12 Feb 2025 21:34:22 +0000 (GMT) Received: from pps.filterd (ppma22.wdc07v.mail.ibm.com [127.0.0.1]) by ppma22.wdc07v.mail.ibm.com (8.18.1.2/8.18.1.2) with ESMTP id 51CISi6L028244; Wed, 12 Feb 2025 21:34:21 GMT Received: from smtprelay02.dal12v.mail.ibm.com ([172.16.1.4]) by ppma22.wdc07v.mail.ibm.com (PPS) with ESMTPS id 44phyyk53x-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 12 Feb 2025 21:34:21 +0000 Received: from smtpav03.dal12v.mail.ibm.com (smtpav03.dal12v.mail.ibm.com [10.241.53.102]) by smtprelay02.dal12v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 51CLYKK427460106 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 12 Feb 2025 21:34:20 GMT Received: from smtpav03.dal12v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 6C5975805A; Wed, 12 Feb 2025 21:34:20 +0000 (GMT) Received: from smtpav03.dal12v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 4C74F58056; Wed, 12 Feb 2025 21:34:19 +0000 (GMT) Received: from li-2311da4c-2e09-11b2-a85c-c003041e9174.ibm.com.com (unknown [9.61.186.234]) by smtpav03.dal12v.mail.ibm.com (Postfix) with ESMTP; Wed, 12 Feb 2025 21:34:19 +0000 (GMT) From: Matthew Rosato To: joro@8bytes.org, will@kernel.org, robin.murphy@arm.com, gerald.schaefer@linux.ibm.com, schnelle@linux.ibm.com Cc: hca@linux.ibm.com, gor@linux.ibm.com, agordeev@linux.ibm.com, svens@linux.ibm.com, borntraeger@linux.ibm.com, farman@linux.ibm.com, clegoate@redhat.com, jgg@nvidia.com, iommu@lists.linux.dev, linux-kernel@vger.kernel.org, linux-s390@vger.kernel.org Subject: [PATCH v5 0/4] iommu/s390: add support for IOMMU passthrough Date: Wed, 12 Feb 2025 16:34:14 -0500 Message-ID: <20250212213418.182902-1-mjrosato@linux.ibm.com> X-Mailer: git-send-email 2.48.1 Precedence: bulk X-Mailing-List: linux-s390@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-GUID: c8Zv0tFLzrc5MeB81vmbhQJXWciR6Rc1 X-Proofpoint-ORIG-GUID: c8Zv0tFLzrc5MeB81vmbhQJXWciR6Rc1 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1057,Hydra:6.0.680,FMLib:17.12.68.34 definitions=2025-02-12_06,2025-02-11_01,2024-11-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 impostorscore=0 mlxscore=0 suspectscore=0 adultscore=0 clxscore=1015 mlxlogscore=689 lowpriorityscore=0 priorityscore=1501 phishscore=0 malwarescore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2501170000 definitions=main-2502120152 This series introduces the ability for certain devices on s390 to bypass a layer of IOMMU via the iommu.passthrough=1 option. In order to enable this, the concept of an identity domain is added to s390-iommu. On s390, IOMMU passthrough is only allowed if indicated via a special bit in s390 CLP data for the associated device group, otherwise we must fall back to dma-iommu. Changes for v5: - Fixup error checking for bus_dma_region size - Add review/test tags Changes for v4: - Additional patch to handle IOAT registration within s390-iommu. This fixes an issue with re-registration of identity domain during events like zpci_hot_reset_device - Fixup page alignment for bus_dma_region setup - Dropped a few review/test tags due to above changes Changes for v3: - Rebase onto 6.13 - fixed bus_dma_region size (Niklas) Changes for v2: - Remove ARCH_HAS_PHYS_TO_DMA, use bus_dma_region - Remove use of def_domain_type, use 1 of 2 ops chosen at init Matthew Rosato (4): s390/pci: check for relaxed translation capability s390/pci: store DMA offset in bus_dma_region iommu/s390: handle IOAT registration based on domain iommu/s390: implement iommu passthrough via identity domain arch/s390/include/asm/pci.h | 4 +- arch/s390/include/asm/pci_clp.h | 4 +- arch/s390/kvm/pci.c | 17 +--- arch/s390/pci/pci.c | 35 ++++---- arch/s390/pci/pci_bus.c | 25 ++++++ arch/s390/pci/pci_clp.c | 1 + arch/s390/pci/pci_sysfs.c | 11 +-- drivers/iommu/s390-iommu.c | 138 ++++++++++++++++++++++++++------ 8 files changed, 168 insertions(+), 67 deletions(-) -- 2.48.1