linux-stable.git/include/linux/intel-iommu.h, branch v5.18.3

iommu/vt-d: Enable ATS for the devices in SATC table

2022-03-04T15:46:31+00:00

Starting from Intel VT-d v3.2, Intel platform BIOS can provide additional
SATC table structure. SATC table includes a list of SoC integrated devices
that support ATC (Address translation cache).

Enabling ATC (via ATS capability) can be a functional requirement for SATC
device operation or optional to enhance device performance/functionality.
This is determined by the bit of ATC_REQUIRED in SATC table. When IOMMU is
working in scalable mode, software chooses to always enable ATS for every
device in SATC table because Intel SoC devices in SATC table are trusted to
use ATS.

On the other hand, if IOMMU is in legacy mode, ATS of SATC capable devices
can work transparently to software and be automatically enabled by IOMMU
hardware. As the result, there is no need for software to enable ATS on
these devices.

This also removes dmar_find_matched_atsr_unit() helper as it becomes dead
code now.

Signed-off-by: Yian Chen 
Link: https://lore.kernel.org/r/20220222185416.1722611-1-yian.chen@intel.com
Signed-off-by: Lu Baolu 
Link: https://lore.kernel.org/r/20220301020159.633356-13-baolu.lu@linux.intel.com
Signed-off-by: Joerg Roedel

iommu/vt-d: Move intel_iommu_ops to header file

2022-03-04T15:46:31+00:00

Compiler is not happy about hidden declaration of intel_iommu_ops.

.../iommu.c:414:24: warning: symbol 'intel_iommu_ops' was not declared. Should it be static?

Move declaration to header file to make compiler happy.

Signed-off-by: Andy Shevchenko 
Link: https://lore.kernel.org/r/20220207141240.8253-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Lu Baolu 
Link: https://lore.kernel.org/r/20220301020159.633356-10-baolu.lu@linux.intel.com
Signed-off-by: Joerg Roedel

iommu/vt-d: Remove DEFER_DEVICE_DOMAIN_INFO

2022-03-04T15:46:30+00:00

Allocate and set the per-device iommu private data during iommu device
probe. This makes the per-device iommu private data always available
during iommu_probe_device() and iommu_release_device(). With this changed,
the dummy DEFER_DEVICE_DOMAIN_INFO pointer could be removed. The wrappers
for getting the private data and domain are also cleaned.

Signed-off-by: Lu Baolu 
Reviewed-by: Christoph Hellwig 
Reviewed-by: Jason Gunthorpe 
Link: https://lore.kernel.org/r/20220214025704.3184654-1-baolu.lu@linux.intel.com
Link: https://lore.kernel.org/r/20220301020159.633356-6-baolu.lu@linux.intel.com
Signed-off-by: Joerg Roedel

iommu/vt-d: Remove intel_iommu::domains

2022-03-04T15:46:30+00:00

The "domains" field of the intel_iommu structure keeps the mapping of
domain_id to dmar_domain. This information is not used anywhere. Remove
and cleanup it to avoid unnecessary memory consumption.

Signed-off-by: Lu Baolu 
Reviewed-by: Christoph Hellwig 
Reviewed-by: Jason Gunthorpe 
Link: https://lore.kernel.org/r/20220214025704.3184654-1-baolu.lu@linux.intel.com
Link: https://lore.kernel.org/r/20220301020159.633356-2-baolu.lu@linux.intel.com
Signed-off-by: Joerg Roedel

iommu/vt-d: Remove aux-domain related callbacks

2022-02-28T12:25:48+00:00

The aux-domain related callbacks are not called in the tree. Remove them
to avoid dead code.

Signed-off-by: Lu Baolu 
Reviewed-by: Christoph Hellwig 
Reviewed-by: Jason Gunthorpe 
Link: https://lore.kernel.org/r/20220216025249.3459465-4-baolu.lu@linux.intel.com
Signed-off-by: Joerg Roedel

iommu/vt-d: Remove guest pasid related callbacks

2022-02-28T12:25:48+00:00

The guest pasid related callbacks are not called in the tree. Remove them
to avoid dead code.

Signed-off-by: Lu Baolu 
Reviewed-by: Christoph Hellwig 
Reviewed-by: Jason Gunthorpe 
Link: https://lore.kernel.org/r/20220216025249.3459465-2-baolu.lu@linux.intel.com
Signed-off-by: Joerg Roedel

iommu/vt-d: Avoid duplicate removing in __domain_mapping()

2021-10-18T10:31:48+00:00

The __domain_mapping() always removes the pages in the range from
'iov_pfn' to 'end_pfn', but the 'end_pfn' is always the last pfn
of the range that the caller wants to map.

This would introduce too many duplicated removing and leads the
map operation take too long, for example:

  Map iova=0x100000,nr_pages=0x7d61800
    iov_pfn: 0x100000, end_pfn: 0x7e617ff
    iov_pfn: 0x140000, end_pfn: 0x7e617ff
    iov_pfn: 0x180000, end_pfn: 0x7e617ff
    iov_pfn: 0x1c0000, end_pfn: 0x7e617ff
    iov_pfn: 0x200000, end_pfn: 0x7e617ff
    ...
  it takes about 50ms in total.

We can reduce the cost by recalculate the 'end_pfn' and limit it
to the boundary of the end of this pte page.

  Map iova=0x100000,nr_pages=0x7d61800
    iov_pfn: 0x100000, end_pfn: 0x13ffff
    iov_pfn: 0x140000, end_pfn: 0x17ffff
    iov_pfn: 0x180000, end_pfn: 0x1bffff
    iov_pfn: 0x1c0000, end_pfn: 0x1fffff
    iov_pfn: 0x200000, end_pfn: 0x23ffff
    ...
  it only need 9ms now.

This also removes a meaningless BUG_ON() in __domain_mapping().

Signed-off-by: Longpeng(Mike) 
Tested-by: Liujunjie 
Link: https://lore.kernel.org/r/20211008000433.1115-1-longpeng2@huawei.com
Signed-off-by: Lu Baolu 
Link: https://lore.kernel.org/r/20211014053839.727419-10-baolu.lu@linux.intel.com
Signed-off-by: Joerg Roedel

iommu/vt-d: Convert the return type of first_pte_in_page to bool

2021-10-18T10:31:48+00:00

The first_pte_in_page() returns true or false, so let's convert its
return type to bool. In addition, use 'IS_ALIGNED' to make the
code more readable and neater.

Signed-off-by: Longpeng(Mike) 
Link: https://lore.kernel.org/r/20211008000433.1115-1-longpeng2@huawei.com
Signed-off-by: Lu Baolu 
Link: https://lore.kernel.org/r/20211014053839.727419-9-baolu.lu@linux.intel.com
Signed-off-by: Joerg Roedel

iommu/vt-d: Remove duplicate identity domain flag

2021-10-18T10:31:48+00:00

The iommu_domain data structure already has the "type" field to keep the
type of a domain. It's unnecessary to have the DOMAIN_FLAG_STATIC_IDENTITY
flag in the vt-d implementation. This cleans it up with no functionality
change.

Signed-off-by: Lu Baolu 
Reviewed-by: Kevin Tian 
Link: https://lore.kernel.org/r/20210926114535.923263-1-baolu.lu@linux.intel.com
Link: https://lore.kernel.org/r/20211014053839.727419-4-baolu.lu@linux.intel.com
Signed-off-by: Joerg Roedel

iommu/vt-d: Update the virtual command related registers

2021-08-19T08:41:08+00:00

The VT-d spec Revision 3.3 updated the virtual command registers, virtual
command opcode B register, virtual command response register and virtual
command capability register (Section 10.4.43, 10.4.44, 10.4.45, 10.4.46).
This updates the virtual command interface implementation in the Intel
IOMMU driver accordingly.

Fixes: 24f27d32ab6b7 ("iommu/vt-d: Enlightened PASID allocation")
Signed-off-by: Lu Baolu 
Cc: Ashok Raj 
Cc: Sanjay Kumar 
Cc: Kevin Tian 
Link: https://lore.kernel.org/r/20210713042649.3547403-1-baolu.lu@linux.intel.com
Link: https://lore.kernel.org/r/20210818134852.1847070-2-baolu.lu@linux.intel.com
Signed-off-by: Joerg Roedel