| Commit message (Collapse) | Author | Age | Files | Lines |
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Apart from fault handling and page table manipulation, we don't care
about memory ordering between SMMU control registers and normal,
cacheable memory, so use the _relaxed I/O accessors wherever possible.
Signed-off-by: Will Deacon <will.deacon@arm.com>
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Use devm_ioremap_resource instead of devm_request_and_ioremap.
This was partly done using the semantic patch
scripts/coccinelle/api/devm_ioremap_resource.cocci
The error-handling code on the call to platform_get_resource was removed
manually, and the initialization of smmu->size was manually moved lower, to
take advantage of the NULL test on res performed by devm_ioremap_resource.
Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Will Deacon <will.deacon@arm.com>
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Replace list_for_each_safe() + list_entry() with the simpler
list_for_each_entry_safe().
Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Joerg Roedel <joro@8bytes.org>
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Use for_each_drhd_unit() instead of list_for_each_entry for
better readability.
Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Joerg Roedel <joro@8bytes.org>
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The BUG_ON in drivers/iommu/intel-iommu.c:785 can be triggered from userspace via
VFIO by calling the VFIO_IOMMU_MAP_DMA ioctl on a vfio device with any address
beyond the addressing capabilities of the IOMMU. The problem is that the ioctl code
calls iommu_iova_to_phys before it calls iommu_map. iommu_map handles the case that
it gets addresses beyond the addressing capabilities of its IOMMU.
intel_iommu_iova_to_phys does not.
This patch fixes iommu_iova_to_phys to return NULL for addresses beyond what the
IOMMU can handle. This in turn causes the ioctl call to fail in iommu_map and
(correctly) return EFAULT to the user with a helpful warning message in the kernel
log.
Signed-off-by: Julian Stecklina <jsteckli@os.inf.tu-dresden.de>
Acked-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Joerg Roedel <joro@8bytes.org>
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The warning for the irq remapping broken check in intel_irq_remapping.c is
pretty pointless. We need the warning, but we know where its comming from, the
stack trace will always be the same, and it needlessly triggers things like
Abrt. This changes the warning to just print a text warning about BIOS being
broken, without the stack trace, then sets the appropriate taint bit. Since we
automatically disable irq remapping, theres no need to contiue making Abrt jump
at this problem
Signed-off-by: Neil Horman <nhorman@tuxdriver.com>
CC: Joerg Roedel <joro@8bytes.org>
CC: Bjorn Helgaas <bhelgaas@google.com>
CC: Andy Lutomirski <luto@amacapital.net>
CC: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
CC: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>
Signed-off-by: Joerg Roedel <joro@8bytes.org>
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'tegra_smmu_pm_ops' is used only in this file. Make it static.
Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Acked-by: Hiroshi Doyu <hdoyu@nvidia.com>
Signed-off-by: Joerg Roedel <joro@8bytes.org>
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'tegra_gart_pm_ops' is local to this file. Make it static.
Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Acked-by: Hiroshi Doyu <hdoyu@nvidia.com>
Signed-off-by: Joerg Roedel <joro@8bytes.org>
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The devm_[kzalloc|ioremap] functions allocates data that are released
when a driver detaches. Thus, there is no reason to explicitly call
devm_[kfree|iounmap] in probe or remove functions.
Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Acked-by: Hiroshi Doyu <hdoyu@nvidia.com>
Signed-off-by: Joerg Roedel <joro@8bytes.org>
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When enabling LPAE on ARM, phys_addr_t becomes 64 bits wide and printing
a variable of that type using a simple %x format specifier causes the
compiler to complain. Change the format specifier to %pa, which is used
specifically for variables of type phys_addr_t.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Acked-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Joerg Roedel <joro@8bytes.org>
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Commit 6197ca82 (iommu: Use %pa and %zx instead of casting) introduced the
usage of '%pa', but still kept the '0x', which leads to printing '0x0x'.
Remove the '0x' when '%pa' is used.
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Joerg Roedel <joro@8bytes.org>
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iommu_error class event can be enabled to trigger when an iommu
error occurs. This trace event is intended to be called to report the
error information. Trace information includes driver name, device name,
iova, and flags.
iommu_error:io_page_fault
Signed-off-by: Shuah Khan <shuah.kh@samsung.com>
Signed-off-by: Joerg Roedel <joro@8bytes.org>
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Change iommu driver to call unmap trace event. This iommu_map_unmap class
event can be enabled to trigger when iommu unmap iommu ops is called. Trace
information includes iova, physical address (map event only), and size.
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] .... 1.854102: unmap: IOMMU: iova=0x00000000cb800000 size=0x400
Signed-off-by: Shuah Khan <shuah.kh@samsung.com>
Signed-off-by: Joerg Roedel <joro@8bytes.org>
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Change iommu driver to call map trace event. This iommu_map_unmap class event
can be enabled to trigger when iommu map iommu ops is called. Trace information
includes iova, physical address (map event only), and size.
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] .... 1.854102: map: IOMMU: iova=0x00000000cb800000 paddr=0x00000000cf9fffff size=0x400
Signed-off-by: Shuah Khan <shuah.kh@samsung.com>
Signed-off-by: Joerg Roedel <joro@8bytes.org>
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Change iommu driver to call detach_device_to_domain trace event. This
iommu_device class event can be enabled to trigger when devices are detached
from a domain. Trace information includes device name.
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] .... 1.854102: detach_device_from_domain: IOMMU: device=0000:00:02.0
Signed-off-by: Shuah Khan <shuah.kh@samsung.com>
Signed-off-by: Joerg Roedel <joro@8bytes.org>
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Change iommu driver to call attach_device_to_domain trace event. This
iommu_device class event can be enabled to trigger when devices are attached
to a domain. Trace information includes device name.
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] .... 1.854102: attach_device_to_domain: IOMMU: device=0000:00:02.0
Signed-off-by: Shuah Khan <shuah.kh@samsung.com>
Signed-off-by: Joerg Roedel <joro@8bytes.org>
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Change iommu driver to call remove_device_to_group trace event. This
iommu_group class event can be enabled to trigger when devices get
removed from an iommu group. Trace information includes iommu group id and
device name.
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] .... 1.854101: remove_device_from_group: IOMMU: groupID=0 device=0000:00:02.0
Signed-off-by: Shuah Khan <shuah.kh@samsung.com>
Signed-off-by: Joerg Roedel <joro@8bytes.org>
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Change iommu driver to call add_device_to_group trace event. This iommu_group
class event can be enabled to trigger when devices get added to an iommu group.
Trace information includes iommu group id and device name.
Testing:
The following is trace is generated when intel-iommu driver adds devices to
to iommu groups during boot-time during its initialization:
swapper/0-1 [003] .... 1.854793: add_device_to_group: IOMMU: groupID=0 device=0000:00:00.0
swapper/0-1 [003] .... 1.854797: add_device_to_group: IOMMU: groupID=1 device=0000:00:02.0
Signed-off-by: Shuah Khan <shuah.kh@samsung.com>
Signed-off-by: Joerg Roedel <joro@8bytes.org>
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Add tracing feature to iommu to report various iommu events. Classes
iommu_group, iommu_device, and iommu_map_unmap are defined.
iommu_group class events can be enabled to trigger when devices get added
to and removed from an iommu group. Trace information includes iommu group
id and device name.
iommu:add_device_to_group
iommu:remove_device_from_group
iommu_device class events can be enabled to trigger when devices are attached
to and detached from a domain. Trace information includes device name.
iommu:attach_device_to_domain
iommu:detach_device_from_domain
iommu_map_unmap class events can be enabled to trigger when iommu map and
unmap iommu ops. Trace information includes iova, physical address (map event
only), and size.
iommu:map
iommu:unmap
Signed-off-by: Shuah Khan <shuah.kh@samsung.com>
Signed-off-by: Joerg Roedel <joro@8bytes.org>
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Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Cc: Grant Likely <grant.likely@linaro.org>
Cc: Rob Herring <rob.herring@calxeda.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull ACPI and power management updates from Rafael J Wysocki:
- New power capping framework and the the Intel Running Average Power
Limit (RAPL) driver using it from Srinivas Pandruvada and Jacob Pan.
- Addition of the in-kernel switching feature to the arm_big_little
cpufreq driver from Viresh Kumar and Nicolas Pitre.
- cpufreq support for iMac G5 from Aaro Koskinen.
- Baytrail processors support for intel_pstate from Dirk Brandewie.
- cpufreq support for Midway/ECX-2000 from Mark Langsdorf.
- ARM vexpress/TC2 cpufreq support from Sudeep KarkadaNagesha.
- ACPI power management support for the I2C and SPI bus types from Mika
Westerberg and Lv Zheng.
- cpufreq core fixes and cleanups from Viresh Kumar, Srivatsa S Bhat,
Stratos Karafotis, Xiaoguang Chen, Lan Tianyu.
- cpufreq drivers updates (mostly fixes and cleanups) from Viresh
Kumar, Aaro Koskinen, Jungseok Lee, Sudeep KarkadaNagesha, Lukasz
Majewski, Manish Badarkhe, Hans-Christian Egtvedt, Evgeny Kapaev.
- intel_pstate updates from Dirk Brandewie and Adrian Huang.
- ACPICA update to version 20130927 includig fixes and cleanups and
some reduction of divergences between the ACPICA code in the kernel
and ACPICA upstream in order to improve the automatic ACPICA patch
generation process. From Bob Moore, Lv Zheng, Tomasz Nowicki, Naresh
Bhat, Bjorn Helgaas, David E Box.
- ACPI IPMI driver fixes and cleanups from Lv Zheng.
- ACPI hotplug fixes and cleanups from Bjorn Helgaas, Toshi Kani, Zhang
Yanfei, Rafael J Wysocki.
- Conversion of the ACPI AC driver to the platform bus type and
multiple driver fixes and cleanups related to ACPI from Zhang Rui.
- ACPI processor driver fixes and cleanups from Hanjun Guo, Jiang Liu,
Bartlomiej Zolnierkiewicz, Mathieu Rhéaume, Rafael J Wysocki.
- Fixes and cleanups and new blacklist entries related to the ACPI
video support from Aaron Lu, Felipe Contreras, Lennart Poettering,
Kirill Tkhai.
- cpuidle core cleanups from Viresh Kumar and Lorenzo Pieralisi.
- cpuidle drivers fixes and cleanups from Daniel Lezcano, Jingoo Han,
Bartlomiej Zolnierkiewicz, Prarit Bhargava.
- devfreq updates from Sachin Kamat, Dan Carpenter, Manish Badarkhe.
- Operation Performance Points (OPP) core updates from Nishanth Menon.
- Runtime power management core fix from Rafael J Wysocki and update
from Ulf Hansson.
- Hibernation fixes from Aaron Lu and Rafael J Wysocki.
- Device suspend/resume lockup detection mechanism from Benoit Goby.
- Removal of unused proc directories created for various ACPI drivers
from Lan Tianyu.
- ACPI LPSS driver fix and new device IDs for the ACPI platform scan
handler from Heikki Krogerus and Jarkko Nikula.
- New ACPI _OSI blacklist entry for Toshiba NB100 from Levente Kurusa.
- Assorted fixes and cleanups related to ACPI from Andy Shevchenko, Al
Stone, Bartlomiej Zolnierkiewicz, Colin Ian King, Dan Carpenter,
Felipe Contreras, Jianguo Wu, Lan Tianyu, Yinghai Lu, Mathias Krause,
Liu Chuansheng.
- Assorted PM fixes and cleanups from Andy Shevchenko, Thierry Reding,
Jean-Christophe Plagniol-Villard.
* tag 'pm+acpi-3.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (386 commits)
cpufreq: conservative: fix requested_freq reduction issue
ACPI / hotplug: Consolidate deferred execution of ACPI hotplug routines
PM / runtime: Use pm_runtime_put_sync() in __device_release_driver()
ACPI / event: remove unneeded NULL pointer check
Revert "ACPI / video: Ignore BIOS initial backlight value for HP 250 G1"
ACPI / video: Quirk initial backlight level 0
ACPI / video: Fix initial level validity test
intel_pstate: skip the driver if ACPI has power mgmt option
PM / hibernate: Avoid overflow in hibernate_preallocate_memory()
ACPI / hotplug: Do not execute "insert in progress" _OST
ACPI / hotplug: Carry out PCI root eject directly
ACPI / hotplug: Merge device hot-removal routines
ACPI / hotplug: Make acpi_bus_hot_remove_device() internal
ACPI / hotplug: Simplify device ejection routines
ACPI / hotplug: Fix handle_root_bridge_removal()
ACPI / hotplug: Refuse to hot-remove all objects with disabled hotplug
ACPI / scan: Start matching drivers after trying scan handlers
ACPI: Remove acpi_pci_slot_init() headers from internal.h
ACPI / blacklist: fix name of ThinkPad Edge E530
PowerCap: Fix build error with option -Werror=format-security
...
Conflicts:
arch/arm/mach-omap2/opp.c
drivers/Kconfig
drivers/spi/spi.c
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* acpica: (35 commits)
ACPICA: Add __init for ACPICA initializers/finalizers.
ACPICA: Cleanup asmlinkage for ACPICA APIs.
ACPICA: Update acpidump related header file changes.
ACPICA: Update compilation environment settings.
ACPICA: Fix cached object deletion code.
ACPICA: Remove dead AOPOBJ_INVALID check.
ACPICA: Cleanup useless memset invocations.
ACPICA: Fix an ACPI_ALLOCATE_ZEROED() reversal.
ACPICA: Fix wrong object length returned by acpi_ut_get_simple_object_size().
ACPICA: Add new statistics interface.
ACPICA: Update DMAR table definitions.
ACPICA: Update RSDP table definitions.
ACPICA: Update namespace dump code.
ACPICA: Update check for setting the ANOBJ_IS_EXTERNAL flag.
ACPICA: Update default space handlers.
ACPICA: Update version to 20130927.
ACPICA: Update aclinux.h for new OSL override mechanism.
ACPICA: Add support to allow host OS to redefine individual OSL prototypes.
ACPICA: Simplify configuration of global ACPI_REDUCED_HARDWARE macro.
ACPICA: Fix indentation issues for macro invocations.
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This patch updates DMAR table header definitions as such enhancement
has been made in ACPICA upstream already. It ports that change to
the Linux source to reduce source code differences between Linux and
ACPICA upstream.
Build test done on x86-64 machine with the following configs enabled:
CONFIG_DMAR_TABLE
CONFIG_IRQ_REMAP
CONFIG_INTEL_IOMMU
This patch does not affect the generation of the Linux kernel binary.
[rjw: Changelog]
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: Tony Lindgren <tony@atomide.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Commit ebd97be635 ('PCI: remove ARCH_SUPPORTS_MSI kconfig option')
removed the ARCH_SUPPORTS_MSI option which architectures could select
to indicate that they support MSI. Now, all architectures are supposed
to build fine when MSI support is enabled: instead of having the
architecture tell *when* MSI support can be used, it's up to the
architecture code to ensure that MSI support can be enabled.
On x86, commit ebd97be635 removed the following line:
select ARCH_SUPPORTS_MSI if (X86_LOCAL_APIC && X86_IO_APIC)
Which meant that MSI support was only available when the local APIC
and I/O APIC were enabled. While this is always true on SMP or x86-64,
it is not necessarily the case on i386 !SMP.
The below patch makes sure that the local APIC and I/O APIC support is
always enabled when MSI support is enabled. To do so, it:
* Ensures the X86_UP_APIC option is not visible when PCI_MSI is
enabled. This is the option that allows, on UP machines, to enable
or not the APIC support. It is already not visible on SMP systems,
or x86-64 systems, for example. We're simply also making it
invisible on i386 MSI systems.
* Ensures that the X86_LOCAL_APIC and X86_IO_APIC options are 'y'
when PCI_MSI is enabled.
Notice that this change requires a change in drivers/iommu/Kconfig to
avoid a recursive Kconfig dependencey. The AMD_IOMMU option selects
PCI_MSI, but was depending on X86_IO_APIC. This dependency is no
longer needed: as soon as PCI_MSI is selected, the presence of
X86_IO_APIC is guaranteed. Moreover, the AMD_IOMMU already depended on
X86_64, which already guaranteed that X86_IO_APIC was enabled, so this
dependency was anyway redundant.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Link: http://lkml.kernel.org/r/1380794354-9079-1-git-send-email-thomas.petazzoni@free-electrons.com
Reported-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
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We currently reset and enable the SMMU before the device has finished
being probed, so if we fail later on (for example, because we couldn't
request a global irq successfully) then we will leave the device in an
active state.
This patch delays the reset and enabling of the SMMU hardware until
probing has completed.
Cc: <stable@vger.kernel.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
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The extra semi-colon on the end breaks the test.
Cc: <stable@vger.kernel.org>
Tested-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
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Unsigned char is never equal to -1.
Cc: <stable@vger.kernel.org>
Tested-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu
Pull IOMMU Updates from Joerg Roedel:
"This round the updates contain:
- A new driver for the Freescale PAMU IOMMU from Varun Sethi.
This driver has cooked for a while and required changes to the
IOMMU-API and infrastructure that were already merged before.
- Updates for the ARM-SMMU driver from Will Deacon
- Various fixes, the most important one is probably a fix from Alex
Williamson for a memory leak in the VT-d page-table freeing code
In summary not all that much. The biggest part in the diffstat is the
new PAMU driver"
* tag 'iommu-updates-v3.12' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu:
intel-iommu: Fix leaks in pagetable freeing
iommu/amd: Fix resource leak in iommu_init_device()
iommu/amd: Clean up unnecessary MSI/MSI-X capability find
iommu/arm-smmu: Simplify VMID and ASID allocation
iommu/arm-smmu: Don't use VMIDs for stage-1 translations
iommu/arm-smmu: Tighten up global fault reporting
iommu/arm-smmu: Remove broken big-endian check
iommu/fsl: Remove unnecessary 'fsl-pamu' prefixes
iommu/fsl: Fix whitespace problems noticed by git-am
iommu/fsl: Freescale PAMU driver and iommu implementation.
iommu/fsl: Add additional iommu attributes required by the PAMU driver.
powerpc: Add iommu domain pointer to device archdata
iommu/exynos: Remove dead code (set_prefbuf)
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'iommu/fixes' into next
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At best the current code only seems to free the leaf pagetables and
the root. If you're unlucky enough to have a large gap (like any
QEMU guest with more than 3G of memory), only the first chunk of leaf
pagetables are freed (plus the root). This is a massive memory leak.
This patch re-writes the pagetable freeing function to use a
recursive algorithm and manages to not only free all the pagetables,
but does it without any apparent performance loss versus the current
broken version.
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Cc: stable@vger.kernel.org
Reviewed-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Joerg Roedel <joro@8bytes.org>
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Detected by cppcheck.
Signed-off-by: Kamil Dudka <kdudka@redhat.com>
Signed-off-by: Joerg Roedel <joro@8bytes.org>
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PCI core will initialize device MSI/MSI-X capability in
pci_msi_init_pci_dev(). So device driver should use
pci_dev->msi_cap/msix_cap to determine whether the device
support MSI/MSI-X instead of using
pci_find_capability(pci_dev, PCI_CAP_ID_MSI/MSIX). Access
to PCIe device config space again will consume more time.
Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: iommu@lists.linux-foundation.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Joerg Roedel <joro@8bytes.org>
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We only use ASIDs and VMIDs to identify individual stage-1 and stage-2
context-banks respectively, so rather than allocate these separately
from the context-banks, just calculate them based on the context bank
index.
Note that VMIDs are offset by 1, since VMID 0 is reserved for stage-1.
This doesn't cause us any issues with the numberspaces, since the
maximum number of context banks is half the minimum number of VMIDs.
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Joerg Roedel <joro@8bytes.org>
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Although permitted by the architecture, using VMIDs for stage-1
translations causes a complete nightmare for hypervisors, who end up
having to virtualise the VMID space across VMs, which may be using
multiple VMIDs each.
To make life easier for hypervisors (which might just decide not to
support this VMID virtualisation), this patch reworks the stage-1
context-bank TLB invalidation so that:
- Stage-1 mappings are marked non-global in the ptes
- Each Stage-1 context-bank is assigned an ASID in TTBR0
- VMID 0 is reserved for Stage-1 context-banks
This allows the hypervisor to overwrite the Stage-1 VMID in the CBAR
when trapping the write from the guest.
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Joerg Roedel <joro@8bytes.org>
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On systems which use a single, combined irq line for the SMMU, context
faults may result in us spuriously reporting global faults with zero
status registers.
This patch fixes up the fsr checks in both the context and global fault
interrupt handlers, so that we only report the fault if the fsr
indicates something did indeed go awry.
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Joerg Roedel <joro@8bytes.org>
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The bottom word of the pgd should always be written to the low half of
the TTBR, so we don't need to swap anything for big-endian.
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Joerg Roedel <joro@8bytes.org>
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The file defines a pr_fmt macro, so there is no need to add
this prefix to individual messages.
Signed-off-by: Joerg Roedel <joro@8bytes.org>
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Following is a brief description of the PAMU hardware:
PAMU determines what action to take and whether to authorize the action on
the basis of the memory address, a Logical IO Device Number (LIODN), and
PAACT table (logically) indexed by LIODN and address. Hardware devices which
need to access memory must provide an LIODN in addition to the memory address.
Peripheral Access Authorization and Control Tables (PAACTs) are the primary
data structures used by PAMU. A PAACT is a table of peripheral access
authorization and control entries (PAACE).Each PAACE defines the range of
I/O bus address space that is accessible by the LIOD and the associated access
capabilities.
There are two types of PAACTs: primary PAACT (PPAACT) and secondary PAACT
(SPAACT).A given physical I/O device may be able to act as one or more
independent logical I/O devices (LIODs). Each such logical I/O device is
assigned an identifier called logical I/O device number (LIODN). A LIODN is
allocated a contiguous portion of the I/O bus address space called the DSA window
for performing DSA operations. The DSA window may optionally be divided into
multiple sub-windows, each of which may be used to map to a region in system
storage space. The first sub-window is referred to as the primary sub-window
and the remaining are called secondary sub-windows.
This patch provides the PAMU driver (fsl_pamu.c) and the corresponding IOMMU
API implementation (fsl_pamu_domain.c). The PAMU hardware driver (fsl_pamu.c)
has been derived from the work done by Ashish Kalra and Timur Tabi.
[For iommu group support]
Acked-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Timur Tabi <timur@tabi.org>
Signed-off-by: Varun Sethi <Varun.Sethi@freescale.com>
Signed-off-by: Joerg Roedel <joro@8bytes.org>
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exynos_sysmmu_set_prefbuf() is not called any where.
Signed-off-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Cho KyongHo <pullip.cho@samsung.com>
Signed-off-by: Joerg Roedel <joro@8bytes.org>
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The driver core clears the driver data to NULL after device_release or
on probe failure. Thus, it is not needed to manually clear the device
driver data to NULL.
Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Cc: David Brown <davidb@codeaurora.org>
Cc: Stephen Boyd <sboyd@codeaurora.org>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: Suman Anna <s-anna@ti.com>
Acked-by: Libo Chen <libo.chen@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/swarren/linux-tegra into next/cleanup
From: Stephen Warren:
ARM: tegra: cleanups for 3.12
This branch includes a single cleanup patch which removes redundant
error-handling for platform_get_resource().
* tag 'tegra-for-3.12-cleanup' of git://git.kernel.org/pub/scm/linux/kernel/git/swarren/linux-tegra:
tegra: simplify use of devm_ioremap_resource
Signed-off-by: Kevin Hilman <khilman@linaro.org>
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Remove unneeded error handling on the result of a call to
platform_get_resource when the value is passed to devm_ioremap_resource.
A simplified version of the semantic patch that makes this change is as
follows: (http://coccinelle.lip6.fr/)
// <smpl>
@@
expression pdev,res,n,e,e1;
expression ret != 0;
identifier l;
@@
- res = platform_get_resource(pdev, IORESOURCE_MEM, n);
... when != res
- if (res == NULL) { ... \(goto l;\|return ret;\) }
... when != res
+ res = platform_get_resource(pdev, IORESOURCE_MEM, n);
e = devm_ioremap_resource(e1, res);
// </smpl>
Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Stephen Warren <swarren@nvidia.com>
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Two header files exist in mach-msm's include/mach directory that
are only used by the MSM iommu driver. Move these files to the
iommu driver directory and prefix them with "msm_". This allows
us to compile the MSM iommu driver on multi-platform kernels.
Acked-by: Joerg Roedel <joro@8bytes.org>
Cc: Stepan Moskovchenko <stepanm@codeaurora.org>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: David Brown <davidb@codeaurora.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu
Pull IOMMU updates from Joerg Roedel:
"A few updates this time, most important and exiciting (to me) is:
- The new ARM SMMU driver. This is a common IOMMU driver that will
hopefully be used in a lot of upcoming ARM chips. So the mess in
the past where every SOC had its own IOMMU will be over.
Besides that:
- Some important fixes in the IOMMU unmap path. There are fixes in
the common code and also in the AMD IOMMU driver.
- Other random fixes"
* tag 'iommu-updates-v3.11' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu:
MAINTAINERS: add entry for ARM system MMU driver
iommu/arm: Add support for ARM Ltd. System MMU architecture
documentation/iommu: Add description of ARM System MMU binding
iommu: Use %pa and %zx instead of casting
iommu/amd: Only unmap large pages from the first pte
iommu: Fix compiler warning on pr_debug
iommu/amd: Fix memory leak in free_pagetable
iommu: Split iommu_unmaps
iommu/{vt-d,amd}: Remove multifunction assumption around grouping
iommu/omap: fix checkpatch warnings in omap iommu code
iommu/omap: fix printk formats for dma_addr_t
iommu/vt-d: DMAR reporting table needs at least one DRHD
iommu/vt-d: Downgrade the warning if enabling irq remapping fails
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This patch adds support for SMMUs implementing the ARM System MMU
architecture versions 1 or 2. Both arm and arm64 are supported, although
the v7s descriptor format is not used.
Cc: Rob Herring <robherring2@gmail.com>
Cc: Andreas Herrmann <andreas.herrmann@calxeda.com>
Cc: Olav Haugan <ohaugan@codeaurora.org>
Cc: Joerg Roedel <joro@8bytes.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Acked-by: Andreas Herrmann <andreas.herrmann@calxeda.com>
Signed-off-by: Joerg Roedel <joro@8bytes.org>
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If we use a large mapping, the expectation is that only unmaps from
the first pte in the superpage are supported. Unmaps from offsets
into the superpage should fail (ie. return zero sized unmap). In the
current code, unmapping from an offset clears the size of the full
mapping starting from an offset. For instance, if we map a 16k
physically contiguous range at IOVA 0x0 with a large page, then
attempt to unmap 4k at offset 12k, 4 ptes are cleared (12k - 28k) and
the unmap returns 16k unmapped. This potentially incorrectly clears
valid mappings and confuses drivers like VFIO that use the unmap size
to release pinned pages.
Fix by refusing to unmap from offsets into the page.
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Cc: stable@vger.kernel.org
Signed-off-by: Joerg Roedel <joro@8bytes.org>
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The IOMMU pagetables can have up to 6 levels, but the code
in free_pagetable() only releases the first 3 levels. Fix
this leak by releasing all levels.
Reported-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Joerg Roedel <joro@8bytes.org>
Reviewed-by: Alex Williamson <alex.williamson@redhat.com>
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