kernel/include/linux/intel-svm.h, branch linux-5.14.y

iommu/vt-d: Remove SVM_FLAG_PRIVATE_PASID

2021-04-07T08:15:19Z

The SVM_FLAG_PRIVATE_PASID has never been referenced in the tree, and there's no plan to have anything to use it. So cleanup it. Signed-off-by: Lu Baolu Reviewed-by: Christoph Hellwig Link: https://lore.kernel.org/r/20210323010600.678627-4-baolu.lu@linux.intel.com Signed-off-by: Joerg Roedel

iommu/vt-d: Remove svm_dev_ops

2021-04-07T08:15:19Z

The svm_dev_ops has never been referenced in the tree, and there's no plan to have anything to use it. Remove it to make the code neat. Signed-off-by: Lu Baolu Reviewed-by: Christoph Hellwig Link: https://lore.kernel.org/r/20210323010600.678627-3-baolu.lu@linux.intel.com Signed-off-by: Joerg Roedel

drm, iommu: Change type of pasid to u32

2020-09-17T17:21:16Z

PASID is defined as a few different types in iommu including "int", "u32", and "unsigned int". To be consistent and to match with uapi definitions, define PASID and its variations (e.g. max PASID) as "u32". "u32" is also shorter and a little more explicit than "unsigned int". No PASID type change in uapi although it defines PASID as __u64 in some places. Suggested-by: Thomas Gleixner Signed-off-by: Fenghua Yu Signed-off-by: Borislav Petkov Reviewed-by: Tony Luck Reviewed-by: Lu Baolu Acked-by: Felix Kuehling Acked-by: Joerg Roedel Link: https://lkml.kernel.org/r/1600187413-163670-2-git-send-email-fenghua.yu@intel.com

iommu/vt-d: Replace intel SVM APIs with generic SVA APIs

2020-05-18T13:37:25Z

This patch is an initial step to replace Intel SVM code with the following IOMMU SVA ops: intel_svm_bind_mm() => iommu_sva_bind_device() intel_svm_unbind_mm() => iommu_sva_unbind_device() intel_svm_is_pasid_valid() => iommu_sva_get_pasid() The features below will continue to work but are not included in this patch in that they are handled mostly within the IOMMU subsystem. - IO page fault - mmu notifier Consolidation of the above will come after merging generic IOMMU sva code[1]. There should not be any changes needed for SVA users such as accelerator device drivers during this time. [1] http://jpbrucker.net/sva/ Signed-off-by: Jacob Pan Signed-off-by: Lu Baolu Link: https://lore.kernel.org/r/20200516062101.29541-12-baolu.lu@linux.intel.com Signed-off-by: Joerg Roedel

iommu/vt-d: Add bind guest PASID support

2020-05-18T13:37:25Z

When supporting guest SVA with emulated IOMMU, the guest PASID table is shadowed in VMM. Updates to guest vIOMMU PASID table will result in PASID cache flush which will be passed down to the host as bind guest PASID calls. For the SL page tables, it will be harvested from device's default domain (request w/o PASID), or aux domain in case of mediated device. .-------------. .---------------------------. | vIOMMU | | Guest process CR3, FL only| | | '---------------------------' .----------------/ | PASID Entry |--- PASID cache flush - '-------------' | | | V | | CR3 in GPA '-------------' Guest ------| Shadow |--------------------------|-------- v v v Host .-------------. .----------------------. | pIOMMU | | Bind FL for GVA-GPA | | | '----------------------' .----------------/ | | PASID Entry | V (Nested xlate) '----------------\.------------------------------. | | |SL for GPA-HPA, default domain| | | '------------------------------' '-------------' Where: - FL = First level/stage one page tables - SL = Second level/stage two page tables Signed-off-by: Jacob Pan Signed-off-by: Liu Yi L Signed-off-by: Lu Baolu Link: https://lore.kernel.org/r/20200516062101.29541-5-baolu.lu@linux.intel.com Signed-off-by: Joerg Roedel

iommu/vt-d: Fix compile warning from intel-svm.h

2020-02-10T09:41:20Z

The intel_svm_is_pasid_valid() needs to be marked inline, otherwise it causes the compile warning below: CC [M] drivers/dma/idxd/cdev.o In file included from drivers/dma/idxd/cdev.c:9:0: ./include/linux/intel-svm.h:125:12: warning: ‘intel_svm_is_pasid_valid’ defined but not used [-Wunused-function] static int intel_svm_is_pasid_valid(struct device *dev, int pasid) ^~~~~~~~~~~~~~~~~~~~~~~~ Reported-by: Borislav Petkov Fixes: 15060aba71711 ('iommu/vt-d: Helper function to query if a pasid has any active users') Signed-off-by: Joerg Roedel

Merge branches 'x86/vt-d', 'x86/amd', 'arm/smmu', 'arm/omap', 'generic-dma-ops' and 'core' into next

2019-07-04T15:26:48Z

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 288

2019-06-05T15:36:37Z

Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms and conditions of the gnu general public license version 2 as published by the free software foundation this program is distributed in the hope it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 263 file(s). Signed-off-by: Thomas Gleixner Reviewed-by: Allison Randal Reviewed-by: Alexios Zavras Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190529141901.208660670@linutronix.de Signed-off-by: Greg Kroah-Hartman

iommu/vt-d: Fix typo in SVM code comment

2019-05-28T13:40:27Z

Fix 'acccess' to 'access'. Signed-off-by: Weitao Hou Signed-off-by: Joerg Roedel

iommu/vt-d: Support page request in scalable mode

2019-01-11T12:10:03Z

VT-d Rev3.0 has made a few changes to the page request interface, 1. widened PRQ descriptor from 128 bits to 256 bits; 2. removed streaming response type; 3. introduced private data that requires page response even the request is not last request in group (LPIG). This is a supplement to commit 1c4f88b7f1f92 ("iommu/vt-d: Shared virtual address in scalable mode") and makes the svm code compliant with VT-d Rev3.0. Cc: Ashok Raj Cc: Liu Yi L Cc: Kevin Tian Signed-off-by: Jacob Pan Fixes: 1c4f88b7f1f92 ("iommu/vt-d: Shared virtual address in scalable mode") Signed-off-by: Lu Baolu Signed-off-by: Joerg Roedel