From mboxrd@z Thu Jan 1 00:00:00 1970 From: Lu Baolu Subject: [PATCH 00/10] iommu/vt-d: Add scalable mode support Date: Mon, 16 Jul 2018 14:49:43 +0800 Message-ID: <1531723793-14607-1-git-send-email-baolu.lu@linux.intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org Errors-To: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org To: Joerg Roedel , David Woodhouse Cc: ashok.raj-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org, sanjay.k.kumar-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org, iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, yi.y.sun-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org, jacob.jun.pan-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org List-Id: iommu@lists.linux-foundation.org Hi, Intel vt-d rev3.0 [1] introduces a new translation mode called 'scalable mode', which enables PASID-granular translations for first level, second level, nested and pass-through modes. The vt-d scalable mode is the key ingredient to enable Scalable I/O Virtualization (Scalable IOV) [2] [3], which allows sharing a device in minimal possible granularity (ADI - Assignable Device Interface). It also includes all the capabilities required to enable Shared Virtual Addressing (SVA). As a result, previous Extended Context (ECS) mode is deprecated (no production ever implements ECS). Each scalable mode pasid table entry is 64 bytes in length, with fields point to the first level page table and the second level page table. The PGTT (Pasid Granular Translation Type) field is used by hardware to determine the translation type. A Scalable Mode .-------------. PASID Entry .-| | .------------------. .-| | 1st Level | 7| | | | | Page Table | .------------------. | | | | 6| | | | | | '------------------' | | '-------------' 5| | | '-------------' '------------------' '-------------' 4| | ^ '------------------' / 3| | / .-------------. .----.-------.-----. / .-| | 2| | FLPTR | |/ .-| | 2nd Level | .----'-------'-----. | | | Page Table | 1| | | | | | .-.-------..------.. | | | | 0| | SLPTR || PGTT ||----> | | '-------------' '-'-------''------'' | '-------------' 6 | 0 '-------------' 3 v .------------------------------------. | PASID Granular Translation Type | | | | 001b: 1st level translation only | | 101b: 2nd level translation only | | 011b: Nested translation | | 100b: Pass through | '------------------------------------' This patch series adds the scalable mode support in the Intel IOMMU driver. It will make all the Intel IOMMU features work in scalable mode. The changes are all constrained within the Intel IOMMU driver, as it's purely internal format change. This patch series depends on a patch set titled ("iommu/vt-d: Improve PASID id and table management") post here [4] which implements global pasid namespace and per-device pasid table APIs. References: [1] https://software.intel.com/en-us/download/intel-virtualization-technology-for-directed-io-architecture-specification [2] https://software.intel.com/en-us/download/intel-scalable-io-virtualization-technical-specification [3] https://schd.ws/hosted_files/lc32018/00/LC3-SIOV-final.pdf [4] https://lkml.org/lkml/2018/7/14/69 Best regards, Lu Baolu Lu Baolu (10): iommu/vt-d: Enumerate the scalable mode capability iommu/vt-d: Manage scalalble mode PASID tables iommu/vt-d: Move page table helpers into header iommu/vt-d: Add second level page table interface iommu/vt-d: Setup pasid entry for RID2PASID support iommu/vt-d: Pass pasid table to context mapping iommu/vt-d: Setup context and enable RID2PASID support iommu/vt-d: Add first level page table interface iommu/vt-d: Shared virtual address in scalable mode iommu/vt-d: Remove deferred invalidation drivers/iommu/intel-iommu.c | 252 +++++++++++++++++++----------------- drivers/iommu/intel-pasid.c | 295 ++++++++++++++++++++++++++++++++++++++++-- drivers/iommu/intel-pasid.h | 20 ++- drivers/iommu/intel-svm.c | 74 +---------- include/linux/dma_remapping.h | 9 +- include/linux/intel-iommu.h | 54 ++++++-- 6 files changed, 485 insertions(+), 219 deletions(-) -- 2.7.4