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[2620:137:e000::1:20]) by mx.google.com with ESMTP id h21-20020a1709060f5500b0099cf58066efsi1223097ejj.828.2023.08.08.12.03.07; Tue, 08 Aug 2023 12:03:31 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@intel.com header.s=Intel header.b=VL3+r+Jo; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=intel.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229790AbjHHQma (ORCPT + 99 others); Tue, 8 Aug 2023 12:42:30 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39260 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233001AbjHHQlT (ORCPT ); Tue, 8 Aug 2023 12:41:19 -0400 Received: from mgamail.intel.com (mgamail.intel.com [134.134.136.100]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C4FC915CB5 for ; Tue, 8 Aug 2023 08:54:54 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1691510094; x=1723046094; h=from:to:cc:subject:date:message-id; bh=bZYKDkWN/NzViSoHo0Sz+w7bafCwSfAclgWR77m9hZM=; b=VL3+r+Joia9AEKj6g474X8WaPHVDN953ZisfX033av7/XysWTrw5kTzx 34U9/lOVkcKyO25E0u9q2utSlMSO6M/JwHK2sHRWmSe6X3p62DUfe2W/b mgAV0w4RNqmVLy98+kI8HTiBU9ETC1vuHH25jlIsIXouv/uX2LIk6v75u znpNEcV0sj9eh0PNDO6WAkBDAmpRJyFMxXBMhnprb7wgKMdYKYfn4EfMY PLc2LHIpZm0SBJj880IcSqvYvF0yMsBUxv/59AdELXo+MnudssRUoBXhd oHFPJF7Bc3GRYOFfdcGFpnNTTweJDSEnmhIu24jugbliRG/3tyqJqYpLe A==; X-IronPort-AV: E=McAfee;i="6600,9927,10795"; a="437078606" X-IronPort-AV: E=Sophos;i="6.01,263,1684825200"; d="scan'208";a="437078606" Received: from orsmga003.jf.intel.com ([10.7.209.27]) by orsmga105.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 08 Aug 2023 00:49:51 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10795"; a="681146258" X-IronPort-AV: E=Sophos;i="6.01,263,1684825200"; d="scan'208";a="681146258" Received: from kechen-optiplex-9020.bj.intel.com ([10.238.156.126]) by orsmga003.jf.intel.com with ESMTP; 08 Aug 2023 00:49:49 -0700 From: Tina Zhang To: Jason Gunthorpe , Kevin Tian , Lu Baolu , Michael Shavit Cc: iommu@lists.linux.dev, linux-kernel@vger.kernel.org, Tina Zhang Subject: [PATCH 0/5] Share sva domains with all devices bound to a mm Date: Tue, 8 Aug 2023 15:49:39 +0800 Message-Id: <20230808074944.7825-1-tina.zhang@intel.com> X-Mailer: git-send-email 2.17.1 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF, RCVD_IN_DNSWL_BLOCKED,SPF_HELO_NONE,SPF_NONE,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1773688755652745629 X-GMAIL-MSGID: 1773688755652745629 A sva domain's lifetime begins with binding a device to a mm and ends by releasing all the bound devices from that sva domain. Technically, there could be more than one sva domain identified by the mm PASID for the use of bound devices issuing DMA transactions. To support mm PASID 1:n with sva domains, each mm needs to keep both a reference list of allocated sva domains and the corresponding PASID. However, currently, mm struct only has one pasid field for sva usage, which is used to keep the info of an assigned PASID. That pasid field cannot provide sufficient info to build up the 1:n mapping between PASID and sva domains. This patch-set fills the gap by adding an mm_iommu field[1], whose type is mm_iommu_data struct, to replace the old pasid field. The introduced mm_iommu_data struct keeps info of both a reference list of sva domains and an assigned PASID. [1]: https://lore.kernel.org/linux-iommu/ZIBxPd1%2FJCAle6yP@nvidia.com/ The RFC version of this patch-set is here: https://lore.kernel.org/linux-iommu/20230707013441.365583-1-tina.zhang@intel.com/ Tina Zhang (5): iommu: Add mm_get_pasid() helper function iommu: Call helper function to get assigned pasid value mm: Add structure to keep sva information iommu: Support mm PASID 1:n with sva domains mm: Deprecate pasid field arch/x86/kernel/traps.c | 2 +- .../iommu/arm/arm-smmu-v3/arm-smmu-v3-sva.c | 12 ++--- drivers/iommu/intel/svm.c | 8 +-- drivers/iommu/iommu-sva.c | 50 ++++++++++++------- include/linux/iommu.h | 19 +++++-- include/linux/mm_types.h | 3 +- kernel/fork.c | 1 - mm/init-mm.c | 3 -- 8 files changed, 58 insertions(+), 40 deletions(-)