linux.git/drivers/acpi/arm64, branch v5.6

Merge tag 'iommu-updates-v5.6' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu

2020-02-05T17:49:54+00:00

Pull iommu updates from Joerg Roedel:

 - Allow compiling the ARM-SMMU drivers as modules.

 - Fixes and cleanups for the ARM-SMMU drivers and io-pgtable code
   collected by Will Deacon. The merge-commit (6855d1ba7537) has all the
   details.

 - Cleanup of the iommu_put_resv_regions() call-backs in various
   drivers.

 - AMD IOMMU driver cleanups.

 - Update for the x2APIC support in the AMD IOMMU driver.

 - Preparation patches for Intel VT-d nested mode support.

 - RMRR and identity domain handling fixes for the Intel VT-d driver.

 - More small fixes and cleanups.

* tag 'iommu-updates-v5.6' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu: (87 commits)
  iommu/amd: Remove the unnecessary assignment
  iommu/vt-d: Remove unnecessary WARN_ON_ONCE()
  iommu/vt-d: Unnecessary to handle default identity domain
  iommu/vt-d: Allow devices with RMRRs to use identity domain
  iommu/vt-d: Add RMRR base and end addresses sanity check
  iommu/vt-d: Mark firmware tainted if RMRR fails sanity check
  iommu/amd: Remove unused struct member
  iommu/amd: Replace two consecutive readl calls with one readq
  iommu/vt-d: Don't reject Host Bridge due to scope mismatch
  PCI/ATS: Add PASID stubs
  iommu/arm-smmu-v3: Return -EBUSY when trying to re-add a device
  iommu/arm-smmu-v3: Improve add_device() error handling
  iommu/arm-smmu-v3: Use WRITE_ONCE() when changing validity of an STE
  iommu/arm-smmu-v3: Add second level of context descriptor table
  iommu/arm-smmu-v3: Prepare for handling arm_smmu_write_ctx_desc() failure
  iommu/arm-smmu-v3: Propagate ssid_bits
  iommu/arm-smmu-v3: Add support for Substream IDs
  iommu/arm-smmu-v3: Add context descriptor tables allocators
  iommu/arm-smmu-v3: Prepare arm_smmu_s1_cfg for SSID support
  ACPI/IORT: Parse SSID property of named component node
  ...

ACPI/IORT: Fix 'Number of IDs' handling in iort_id_map()

2020-01-17T12:48:50+00:00

The IORT specification [0] (Section 3, table 4, page 9) defines the
'Number of IDs' as 'The number of IDs in the range minus one'.

However, the IORT ID mapping function iort_id_map() treats the 'Number
of IDs' field as if it were the full IDs mapping count, with the
following check in place to detect out of boundary input IDs:

InputID >= Input base + Number of IDs

This check is flawed in that it considers the 'Number of IDs' field as
the full number of IDs mapping and disregards the 'minus one' from
the IDs count.

The correct check in iort_id_map() should be implemented as:

InputID > Input base + Number of IDs

this implements the specification correctly but unfortunately it breaks
existing firmwares that erroneously set the 'Number of IDs' as the full
IDs mapping count rather than IDs mapping count minus one.

e.g.

PCI hostbridge mapping entry 1:
Input base:  0x1000
ID Count:    0x100
Output base: 0x1000
Output reference: 0xC4  //ITS reference

PCI hostbridge mapping entry 2:
Input base:  0x1100
ID Count:    0x100
Output base: 0x2000
Output reference: 0xD4  //ITS reference

Two mapping entries which the second entry's Input base = the first
entry's Input base + ID count, so for InputID 0x1100 and with the
correct InputID check in place in iort_id_map() the kernel would map
the InputID to ITS 0xC4 not 0xD4 as it would be expected.

Therefore, to keep supporting existing flawed firmwares, introduce a
workaround that instructs the kernel to use the old InputID range check
logic in iort_id_map(), so that we can support both firmwares written
with the flawed 'Number of IDs' logic and the correct one as defined in
the specifications.

[0]: http://infocenter.arm.com/help/topic/com.arm.doc.den0049d/DEN0049D_IO_Remapping_Table.pdf

Reported-by: Pankaj Bansal 
Link: https://lore.kernel.org/linux-acpi/20191215203303.29811-1-pankaj.bansal@nxp.com/
Signed-off-by: Hanjun Guo 
Signed-off-by: Lorenzo Pieralisi 
Cc: Pankaj Bansal 
Cc: Will Deacon 
Cc: Sudeep Holla 
Cc: Catalin Marinas 
Cc: Robin Murphy 
Signed-off-by: Will Deacon

ACPI/IORT: Parse SSID property of named component node

2020-01-15T16:00:57+00:00

Named component nodes in the IORT tables describe the number of
Substream ID bits (aka. PASID) supported by the device. Propagate this
value to the fwspec structure in order to enable PASID for platform
devices.

Acked-by: Hanjun Guo 
Reviewed-by: Eric Auger 
Reviewed-by: Jonathan Cameron 
Signed-off-by: Jean-Philippe Brucker 
Signed-off-by: Will Deacon

iommu/arm-smmu: Support SMMU module probing from the IORT

2019-12-23T13:06:05+00:00

Add support for SMMU drivers built as modules to the ACPI/IORT device
probing path, by deferring the probe of the master if the SMMU driver is
known to exist but has not been loaded yet. Given that the IORT code
registers a platform device for each SMMU that it discovers, we can
easily trigger the udev based autoloading of the SMMU drivers by making
the platform device identifier part of the module alias.

Reviewed-by: Robin Murphy 
Acked-by: Lorenzo Pieralisi 
Tested-by: John Garry  # only manual smmu ko loading
Signed-off-by: Ard Biesheuvel 
Signed-off-by: Will Deacon 
Tested-by: John Garry  # smmu v3
Reviewed-by: Greg Kroah-Hartman 
Signed-off-by: Joerg Roedel

dma-mapping: treat dev->bus_dma_mask as a DMA limit

2019-11-21T17:14:35+00:00

Using a mask to represent bus DMA constraints has a set of limitations.
The biggest one being it can only hold a power of two (minus one). The
DMA mapping code is already aware of this and treats dev->bus_dma_mask
as a limit. This quirk is already used by some architectures although
still rare.

With the introduction of the Raspberry Pi 4 we've found a new contender
for the use of bus DMA limits, as its PCIe bus can only address the
lower 3GB of memory (of a total of 4GB). This is impossible to represent
with a mask. To make things worse the device-tree code rounds non power
of two bus DMA limits to the next power of two, which is unacceptable in
this case.

In the light of this, rename dev->bus_dma_mask to dev->bus_dma_limit all
over the tree and treat it as such. Note that dev->bus_dma_limit should
contain the higher accessible DMA address.

Signed-off-by: Nicolas Saenz Julienne 
Reviewed-by: Robin Murphy 
Signed-off-by: Christoph Hellwig

ACPI/IORT: Rename arm_smmu_v3_set_proximity() 'node' local variable

2019-08-05T10:06:34+00:00

Commit 36a2ba07757d ("ACPI/IORT: Reject platform device creation on NUMA
node mapping failure") introduced a local variable 'node' in
arm_smmu_v3_set_proximity() that shadows the struct acpi_iort_node
pointer function parameter.

Execution was unaffected but it is prone to errors and can lead
to subtle bugs.

Rename the local variable to prevent any issue.

Reviewed-by: Hanjun Guo 
Reported-by: Will Deacon 
Signed-off-by: Lorenzo Pieralisi 
Cc: Will Deacon 
Cc: Hanjun Guo 
Cc: Sudeep Holla 
Cc: Catalin Marinas 
Cc: Robin Murphy 
Cc: Kefeng Wang 
Signed-off-by: Will Deacon

ACPI/IORT: Fix off-by-one check in iort_dev_find_its_id()

2019-07-23T14:45:46+00:00

Static analysis identified that index comparison against ITS entries in
iort_dev_find_its_id() is off by one.

Update the comparison condition and clarify the resulting error
message.

Fixes: 4bf2efd26d76 ("ACPI: Add new IORT functions to support MSI domain handling")
Link: https://lore.kernel.org/linux-arm-kernel/20190613065410.GB16334@mwanda/
Reviewed-by: Hanjun Guo 
Reported-by: Dan Carpenter 
Signed-off-by: Lorenzo Pieralisi 
Cc: Dan Carpenter 
Cc: Will Deacon 
Cc: Hanjun Guo 
Cc: Sudeep Holla 
Cc: Catalin Marinas 
Cc: Robin Murphy 
Signed-off-by: Will Deacon

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500

2019-06-19T15:09:55+00:00

Based on 2 normalized pattern(s):

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license version 2 as
  published by the free software foundation

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license version 2 as
  published by the free software foundation #

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-only

has been chosen to replace the boilerplate/reference in 4122 file(s).

Signed-off-by: Thomas Gleixner 
Reviewed-by: Enrico Weigelt 
Reviewed-by: Kate Stewart 
Reviewed-by: Allison Randal 
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de
Signed-off-by: Greg Kroah-Hartman

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

2019-06-05T15:36:37+00:00

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

Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux

2019-05-24T18:03:26+00:00

Pull more arm64 fixes from Will Deacon:

 - Fix incorrect LDADD instruction encoding in our disassembly macros

 - Disable the broken ARM64_PSEUDO_NMI support for now

 - Add workaround for Cortex-A76 CPU erratum #1463225

 - Handle Cortex-A76/Neoverse-N1 erratum #1418040 w/ existing workaround

 - Fix IORT build failure if IOMMU_SUPPORT=n

 - Fix place-relative module relocation range checking and its
   interaction with KASLR

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  arm64: insn: Add BUILD_BUG_ON() for invalid masks
  arm64: insn: Fix ldadd instruction encoding
  arm64: Kconfig: Make ARM64_PSEUDO_NMI depend on BROKEN for now
  arm64: Handle erratum 1418040 as a superset of erratum 1188873
  arm64/module: deal with ambiguity in PRELxx relocation ranges
  ACPI/IORT: Fix build error when IOMMU_SUPPORT is disabled
  arm64/kernel: kaslr: reduce module randomization range to 2 GB
  arm64: errata: Add workaround for Cortex-A76 erratum #1463225
  arm64: Remove useless message during oops