linux-toradex.git/include/linux/intel-iommu.h, branch v5.1-rc1

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

2019-01-11T12:10:03+00:00

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

iommu/vt-d: Remove deferred invalidation

2018-12-11T09:46:00+00:00

Deferred invalidation is an ECS specific feature. It will not be
supported when IOMMU works in scalable mode. As we deprecated the
ECS support, remove deferred invalidation and cleanup the code.

Cc: Ashok Raj 
Cc: Jacob Pan 
Cc: Kevin Tian 
Cc: Liu Yi L 
Cc: Sanjay Kumar 
Signed-off-by: Lu Baolu 
Reviewed-by: Ashok Raj 
Signed-off-by: Joerg Roedel

iommu/vt-d: Shared virtual address in scalable mode

2018-12-11T09:46:00+00:00

This patch enables the current SVA (Shared Virtual Address)
implementation to work in the scalable mode.

Cc: Ashok Raj 
Cc: Jacob Pan 
Cc: Kevin Tian 
Signed-off-by: Sanjay Kumar 
Signed-off-by: Liu Yi L 
Signed-off-by: Lu Baolu 
Reviewed-by: Ashok Raj 
Signed-off-by: Joerg Roedel

iommu/vt-d: Add first level page table interface

2018-12-11T09:45:59+00:00

This adds an interface to setup the PASID entries for first
level page table translation.

Cc: Ashok Raj 
Cc: Jacob Pan 
Cc: Kevin Tian 
Signed-off-by: Sanjay Kumar 
Signed-off-by: Liu Yi L 
Signed-off-by: Lu Baolu 
Reviewed-by: Ashok Raj 
Signed-off-by: Joerg Roedel

iommu/vt-d: Setup context and enable RID2PASID support

2018-12-11T09:45:59+00:00

This patch enables the translation for requests without PASID in
the scalable mode by setting up the root and context entries.

Cc: Ashok Raj 
Cc: Jacob Pan 
Cc: Kevin Tian 
Signed-off-by: Sanjay Kumar 
Signed-off-by: Liu Yi L 
Signed-off-by: Lu Baolu 
Reviewed-by: Ashok Raj 
Signed-off-by: Joerg Roedel

iommu/vt-d: Add second level page table interface

2018-12-11T09:45:58+00:00

This adds the interfaces to setup or tear down the structures
for second level page table translations. This includes types
of second level only translation and pass through.

Cc: Ashok Raj 
Cc: Jacob Pan 
Cc: Kevin Tian 
Signed-off-by: Sanjay Kumar 
Signed-off-by: Liu Yi L 
Signed-off-by: Lu Baolu 
Reviewed-by: Ashok Raj 
Signed-off-by: Joerg Roedel

iommu/vt-d: Add 256-bit invalidation descriptor support

2018-12-11T09:45:58+00:00

Intel vt-d spec rev3.0 requires software to use 256-bit
descriptors in invalidation queue. As the spec reads in
section 6.5.2:

Remapping hardware supporting Scalable Mode Translations
(ECAP_REG.SMTS=1) allow software to additionally program
the width of the descriptors (128-bits or 256-bits) that
will be written into the Queue. Software should setup the
Invalidation Queue for 256-bit descriptors before progra-
mming remapping hardware for scalable-mode translation as
128-bit descriptors are treated as invalid descriptors
(see Table 21 in Section 6.5.2.10) in scalable-mode.

This patch adds 256-bit invalidation descriptor support
if the hardware presents scalable mode capability.

Cc: Ashok Raj 
Cc: Jacob Pan 
Cc: Kevin Tian 
Signed-off-by: Sanjay Kumar 
Signed-off-by: Liu Yi L 
Signed-off-by: Lu Baolu 
Signed-off-by: Joerg Roedel

iommu/vt-d: Move page table helpers into header

2018-12-11T09:45:57+00:00

So that they could also be used in other source files.

Cc: Ashok Raj 
Cc: Jacob Pan 
Cc: Kevin Tian 
Cc: Liu Yi L 
Cc: Sanjay Kumar 
Signed-off-by: Lu Baolu 
Reviewed-by: Ashok Raj 
Reviewed-by: Kevin Tian 
Signed-off-by: Joerg Roedel

iommu/vt-d: Enumerate the scalable mode capability

2018-12-11T09:45:57+00:00

The Intel vt-d spec rev3.0 introduces a new translation
mode called scalable mode, which enables PASID-granular
translations for first level, second level, nested and
pass-through modes. At the same time, the previous
Extended Context (ECS) mode is deprecated (no production
ever implements ECS).

This patch adds enumeration for Scalable Mode and removes
the deprecated ECS enumeration. It provides a boot time
option to disable scalable mode even hardware claims to
support it.

Cc: Ashok Raj 
Cc: Jacob Pan 
Cc: Kevin Tian 
Signed-off-by: Sanjay Kumar 
Signed-off-by: Liu Yi L 
Signed-off-by: Lu Baolu 
Reviewed-by: Ashok Raj 
Reviewed-by: Kevin Tian 
Signed-off-by: Joerg Roedel

iommu/vtd: Cleanup dma_remapping.h header

2018-11-12T13:22:56+00:00

Commit e61d98d8dad00 ("x64, x2apic/intr-remap: Intel vt-d, IOMMU
code reorganization") moved dma_remapping.h from drivers/pci/ to
current place. It is entirely VT-d specific, but uses a generic
name. This merges dma_remapping.h with include/linux/intel-iommu.h
and removes dma_remapping.h as the result.

Cc: Ashok Raj 
Cc: Jacob Pan 
Cc: Sohil Mehta 
Suggested-by: Christoph Hellwig 
Signed-off-by: Lu Baolu 
Reviewed-by: Christoph Hellwig 
Reviewed-by: Liu, Yi L 
Signed-off-by: Joerg Roedel