linux-toradex.git/include/linux/iommu.h, branch v3.17.8

iommu: Fix IOMMU sysfs stubs

2014-07-08T07:40:06+00:00

0-day kernel build testing reports:

   arch/x86/kvm/x86.o: In function `iommu_device_destroy':
>> (.text+0x7a0a): multiple definition of `iommu_device_destroy'
   arch/x86/kvm/../../../virt/kvm/vfio.o:vfio.c:(.text+0x490): first defined here
   arch/x86/kvm/x86.o: In function `iommu_device_link':
>> (.text+0x7a15): multiple definition of `iommu_device_link'
   arch/x86/kvm/../../../virt/kvm/vfio.o:vfio.c:(.text+0x49b): first defined here
   arch/x86/kvm/x86.o: In function `iommu_device_unlink':
>> (.text+0x7a25): multiple definition of `iommu_device_unlink'
   arch/x86/kvm/../../../virt/kvm/vfio.o:vfio.c:(.text+0x4ab): first defined here
   arch/x86/kvm/x86.o: In function `iommu_device_create':
>> (.text+0x79f8): multiple definition of `iommu_device_create'
   arch/x86/kvm/../../../virt/kvm/vfio.o:vfio.c:(.text+0x47e): first defined here

These are due to failing to define the stubs as static inline.  Fix.

Signed-off-by: Alex Williamson 
Signed-off-by: Joerg Roedel

iommu: Constify struct iommu_ops

2014-07-07T08:36:59+00:00

This structure is read-only data and should never be modified.

Signed-off-by: Thierry Reding 
Signed-off-by: Greg Kroah-Hartman 
Signed-off-by: Joerg Roedel

iommu: Add sysfs support for IOMMUs

2014-07-04T10:35:59+00:00

IOMMUs currently have no common representation to userspace, most
seem to have no representation at all aside from a few printks
on bootup.  There are however features of IOMMUs that are useful
to know about.  For instance the IOMMU might support superpages,
making use of processor large/huge pages more important in a device
assignment scenario.  It's also useful to create cross links between
devices and IOMMU hardware units, so that users might be able to
load balance their devices to avoid thrashing a single hardware unit.

This patch adds a device create and destroy interface as well as
device linking, making it very lightweight for an IOMMU driver to add
basic support.  IOMMU drivers can provide additional attributes
automatically by using an attribute_group.

The attributes exposed are expected to be relatively device specific,
the means to retrieve them certainly are, so there are currently no
common attributes for the new class created here.

Signed-off-by: Alex Williamson 
Signed-off-by: Joerg Roedel

iommu/core: Create central IOMMU group lookup/creation interface

2014-07-04T10:35:58+00:00

Currently each IOMMU driver that supports IOMMU groups has its own
code for discovering the base device used in grouping.  This code
is generally not specific to the IOMMU hardware, but to the bus of
the devices managed by the IOMMU.  We can therefore create a common
interface for supporting devices on different buses.

Signed-off-by: Alex Williamson 
Signed-off-by: Joerg Roedel

Merge branches 'arm/smmu', 'core', 'x86/vt-d', 'arm/shmobile', 'x86/amd', 'ppc/pamu', 'iommu/fixes' and 'arm/msm' into next

2014-01-09T12:06:59+00:00

iommu: Rename domain_has_cap to iommu_domain_has_cap

2014-01-07T14:31:59+00:00

domain_has_cap is a misnomer bc the func name should be
the same for CONFIG_IOMMU_API and !CONFIG_IOMMU_API.

Signed-off-by: Upinder Malhi 
Signed-off-by: Joerg Roedel

iommu: Add empty stub for iommu_group_get_by_id()

2013-12-30T14:17:31+00:00

Almost every function in include/linux/iommu.h has an empty stub
but the iommu_group_get_by_id() did not get one by mistake.

This adds an empty stub for iommu_group_get_by_id() for IOMMU_API
disabled config.

Signed-off-by: Alexey Kardashevskiy 
Signed-off-by: Joerg Roedel

iommu: add IOMMU_EXEC flag for safely allowing XN mappings

2013-12-16T19:30:31+00:00

Whilst most IOMMU mappings should probably be non-executable, there
may be cases (HSA?) where executable mappings are required.

This patch introduces a new mapping flag, IOMMU_EXEC, to indicate that
the mapping should be mapped as executable.

Signed-off-by: Will Deacon

iommu: Change iommu driver to call io_page_fault trace event

2013-09-25T09:07:04+00:00

Change iommu driver call io_page_fault trace event. This iommu_error class
event can be enabled to trigger when an iommu error occurs. Trace information
includes driver name, device name, iova, and flags.

Testing:
Added trace calls to iommu_prepare_identity_map() for testing some of the
conditions that are hard to trigger. Here is the trace from the testing:

       swapper/0-1     [003] ....     2.003774: io_page_fault: IOMMU:pci 0000:00:02.0 iova=0x00000000cb800000 flags=0x0002
       swapper/0-1     [003] ....     2.004098: io_page_fault: IOMMU:pci 0000:00:1d.0 iova=0x00000000cadc6000 flags=0x0002
       swapper/0-1     [003] ....     2.004115: io_page_fault: IOMMU:pci 0000:00:1a.0 iova=0x00000000cadc6000 flags=0x0002
       swapper/0-1     [003] ....     2.004129: io_page_fault: IOMMU:pci 0000:00:1f.0 iova=0x0000000000000000 flags=0x0002

Signed-off-by: Shuah Khan 
Signed-off-by: Joerg Roedel

iommu/fsl: Add additional iommu attributes required by the PAMU driver.

2013-08-14T09:38:34+00:00

Added the following domain attributes for the FSL PAMU driver:
1. Added new iommu stash attribute, which allows setting of the
   LIODN specific stash id parameter through IOMMU API.
2. Added an attribute for enabling/disabling DMA to a particular
   memory window.
3. Added domain attribute to check for PAMUV1 specific constraints.

Signed-off-by: Varun Sethi 
Signed-off-by: Joerg Roedel