From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-3.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5AA9CC10F14 for ; Wed, 2 Oct 2019 19:38:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 402C3206BB for ; Wed, 2 Oct 2019 19:38:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729061AbfJBTiu (ORCPT ); Wed, 2 Oct 2019 15:38:50 -0400 Received: from mga06.intel.com ([134.134.136.31]:10181 "EHLO mga06.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726087AbfJBTih (ORCPT ); Wed, 2 Oct 2019 15:38:37 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga001.jf.intel.com ([10.7.209.18]) by orsmga104.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 02 Oct 2019 12:38:35 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.67,249,1566889200"; d="scan'208";a="275456097" Received: from jacob-builder.jf.intel.com ([10.7.199.155]) by orsmga001.jf.intel.com with ESMTP; 02 Oct 2019 12:38:34 -0700 From: Jacob Pan To: iommu@lists.linux-foundation.org, LKML , Joerg Roedel , David Woodhouse , Alex Williamson , Jean-Philippe Brucker Cc: "Yi Liu" , "Tian, Kevin" , Raj Ashok , "Christoph Hellwig" , "Lu Baolu" , Jonathan Cameron , Eric Auger , Jerry Snitselaar , Jacob Pan Subject: [PATCH v4 0/4] User API for nested shared virtual address (SVA) Date: Wed, 2 Oct 2019 12:42:39 -0700 Message-Id: <1570045363-24856-1-git-send-email-jacob.jun.pan@linux.intel.com> X-Mailer: git-send-email 2.7.4 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This set consists of IOMMU APIs to support SVA in the guest, a.k.a nested SVA. As the complete SVA support is complex, we break down the enabling effort into three stages: 1. PCI device direct assignment 2. Fault handling, especially page request service support 3. Mediated device assignment Each stage includes common API and vendor specific IOMMU driver changes. This series is the common uAPI for stage #1. It is intended to build consensus on the interface which all vendors reply on. This series is extracted from the complete stage1 set which includes VT-d code. https://lkml.org/lkml/2019/8/15/951 Changes: - Use spinlock instead of mutex to protect ioasid custom allocators. This is to support callers in atomic context - Added more padding to guest PASID bind data for future extensions, suggested by Joerg. After much thinking, I did not do name change from PASID to IOASID in the uAPI, considering we have been using PASID in the rest of uAPIs. IOASID will remain used within the kernel. For more discussions lead to this series, checkout LPC 2019 VFIO/IOMMU/PCI microconference materials. https://linuxplumbersconf.org/event/4/sessions/66/#20190909 Change log: v4: - minor patch regroup and fixes based on review from Jean v3: - include errno.h in ioasid.h to fix compile error - rebased to v5.4-rc1, no change v2: - Addressed review comments by Jean on IOASID custom allocators, locking fix, misc control flow fix. - Fixed a compile error with missing header errno.h - Updated Jean-Philiippe's new email and updateded reviewed-by tag Jacob Pan (2): iommu/ioasid: Add custom allocators iommu: Introduce guest PASID bind function Jean-Philippe Brucker (1): iommu: Add I/O ASID allocator Yi L Liu (1): iommu: Introduce cache_invalidate API drivers/iommu/Kconfig | 4 + drivers/iommu/Makefile | 1 + drivers/iommu/ioasid.c | 422 +++++++++++++++++++++++++++++++++++++++++++++ drivers/iommu/iommu.c | 30 ++++ include/linux/ioasid.h | 76 ++++++++ include/linux/iommu.h | 36 ++++ include/uapi/linux/iommu.h | 169 ++++++++++++++++++ 7 files changed, 738 insertions(+) create mode 100644 drivers/iommu/ioasid.c create mode 100644 include/linux/ioasid.h -- 2.7.4