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path: root/drivers/iommu/iommu-sysfs.c
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* drivers/iommu: Export core IOMMU API symbols to permit modular driversWill Deacon2019-12-231-0/+5
| | | | | | | | | | Building IOMMU drivers as modules requires that the core IOMMU API symbols are exported as GPL symbols. Signed-off-by: Will Deacon <will@kernel.org> Tested-by: John Garry <john.garry@huawei.com> # smmu v3 Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Joerg Roedel <jroedel@suse.de>
* treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500Thomas Gleixner2019-06-191-4/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | 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 <tglx@linutronix.de> Reviewed-by: Enrico Weigelt <info@metux.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* iommu/sysfs: Rename iommu_release_device()Joerg Roedel2018-12-171-6/+6
| | | | | | | | Remove the iommu_ prefix from the function and a few other static data structures so that the iommu_release_device name can be re-used in iommu core code. Signed-off-by: Joerg Roedel <jroedel@suse.de>
* iommu: Audit and remove any unnecessary uses of module.hPaul Gortmaker2018-12-031-1/+1
| | | | | | | | | | | | | | | | | | | | | | Historically a lot of these existed because we did not have a distinction between what was modular code and what was providing support to modules via EXPORT_SYMBOL and friends. That changed when we forked out support for the latter into the export.h file. This means we should be able to reduce the usage of module.h in code that is obj-y Makefile or bool Kconfig. The advantage in removing such instances is that module.h itself sources about 15 other headers; adding significantly to what we feed cpp, and it can obscure what headers we are effectively using. Since module.h might have been the implicit source for init.h (for __init) and for export.h (for EXPORT_SYMBOL) we consider each instance for the presence of either and replace as needed. Cc: Joerg Roedel <joro@8bytes.org> Cc: iommu@lists.linux-foundation.org Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
* iommu: Fix wrong freeing of iommu_device->devJoerg Roedel2017-08-151-12/+20
| | | | | | | | | | | | | | | | | | | | | The struct iommu_device has a 'struct device' embedded into it, not as a pointer, but the whole struct. In the conversion of the iommu drivers to use struct iommu_device it was forgotten that the relase function for that struct device simply calls kfree() on the pointer. This frees memory that was never allocated and causes memory corruption. To fix this issue, use a pointer to struct device instead of embedding the whole struct. This needs some updates in the iommu sysfs code as well as the Intel VT-d and AMD IOMMU driver. Reported-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Fixes: 39ab9555c241 ('iommu: Add sysfs bindings for struct iommu_device') Cc: stable@vger.kernel.org # >= v4.11 Signed-off-by: Joerg Roedel <jroedel@suse.de>
* iommu: Make iommu_device_link/unlink take a struct iommu_deviceJoerg Roedel2017-02-101-8/+8
| | | | | | | This makes the interface more consistent with iommu_device_sysfs_add/remove. Signed-off-by: Joerg Roedel <jroedel@suse.de>
* iommu: Add sysfs bindings for struct iommu_deviceJoerg Roedel2017-02-101-27/+18
| | | | | | | | | | | | There is currently support for iommu sysfs bindings, but those need to be implemented in the IOMMU drivers. Add a more generic version of this by adding a struct device to struct iommu_device and use that for the sysfs bindings. Also convert the AMD and Intel IOMMU driver to make use of it. Signed-off-by: Joerg Roedel <jroedel@suse.de>
* iommu: Fix compile error in iommu-sysfs.cJoerg Roedel2014-07-071-0/+1
| | | | | | Add missing include of <linux/slab.h>. Signed-off-by: Joerg Roedel <jroedel@suse.de>
* iommu: Add sysfs support for IOMMUsAlex Williamson2014-07-041-0/+133
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 <alex.williamson@redhat.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>