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2022-04-28vfio: Set DMA ownership for VFIO devicesLu Baolu2-0/+2
Claim group dma ownership when an IOMMU group is set to a container, and release the dma ownership once the iommu group is unset from the container. This change disallows some unsafe bridge drivers to bind to non-ACS bridges while devices under them are assigned to user space. This is an intentional enhancement and possibly breaks some existing configurations. The recommendation to such an affected user would be that the previously allowed host bridge driver was unsafe for this use case and to continue to enable assignment of devices within that group, the driver should be unbound from the bridge device or replaced with the pci-stub driver. For any bridge driver, we consider it unsafe if it satisfies any of the following conditions: 1) The bridge driver uses DMA. Calling pci_set_master() or calling any kernel DMA API (dma_map_*() and etc.) is an indicate that the driver is doing DMA. 2) If the bridge driver uses MMIO, it should be tolerant to hostile userspace also touching the same MMIO registers via P2P DMA attacks. If the bridge driver turns out to be a safe one, it could be used as before by setting the driver's .driver_managed_dma field, just like what we have done in the pcieport driver. Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com> Reviewed-by: Jason Gunthorpe <jgg@nvidia.com> Acked-by: Alex Williamson <alex.williamson@redhat.com> Link: https://lore.kernel.org/r/20220418005000.897664-8-baolu.lu@linux.intel.com Signed-off-by: Joerg Roedel <jroedel@suse.de>
2021-09-30vfio: Move vfio_iommu_group_get() to vfio_register_group_dev()Jason Gunthorpe1-12/+1
We don't need to hold a reference to the group in the driver as well as obtain a reference to the same group as the first thing vfio_register_group_dev() does. Since the drivers never use the group move this all into the core code. Signed-off-by: Jason Gunthorpe <jgg@nvidia.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Kevin Tian <kevin.tian@intel.com> Link: https://lore.kernel.org/r/20210924155705.4258-2-hch@lst.de Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
2021-08-26Merge branches 'v5.15/vfio/spdx-license-cleanups', ↵Alex Williamson2-5/+5
'v5.15/vfio/dma-valid-waited-v3', 'v5.15/vfio/vfio-pci-core-v5' and 'v5.15/vfio/vfio-ap' into v5.15/vfio/next
2021-08-26vfio: Use kconfig if XX/endif blocks instead of repeating 'depends on'Jason Gunthorpe2-5/+5
This results in less kconfig wordage and a simpler understanding of the required "depends on" to create the menu structure. The next patch increases the nesting level a lot so this is a nice preparatory simplification. Signed-off-by: Jason Gunthorpe <jgg@nvidia.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Yishai Hadas <yishaih@nvidia.com> Link: https://lore.kernel.org/r/20210826103912.128972-13-yishaih@nvidia.com Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
2021-08-26vfio: Use select for eventfdJason Gunthorpe1-1/+1
If VFIO_VIRQFD is required then turn on eventfd automatically. The majority of kconfig users of the EVENTFD use select not depends on. Signed-off-by: Jason Gunthorpe <jgg@nvidia.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Yishai Hadas <yishaih@nvidia.com> Link: https://lore.kernel.org/r/20210826103912.128972-12-yishaih@nvidia.com Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
2021-08-24vfio: platform: reset: Convert to SPDX identifierCai Huoqing1-9/+1
use SPDX-License-Identifier instead of a verbose license text Signed-off-by: Cai Huoqing <caihuoqing@baidu.com> Link: https://lore.kernel.org/r/20210822043643.2040-1-caihuoqing@baidu.com Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
2021-08-11vfio/platform: Use open_device() instead of open coding a refcnt schemeJason Gunthorpe2-48/+32
Platform simply wants to run some code when the device is first opened/last closed. Use the core framework and locking for this. Aside from removing a bit of code this narrows the locking scope from a global lock. Reviewed-by: Cornelia Huck <cohuck@redhat.com> Reviewed-by: Eric Auger <eric.auger@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com> Signed-off-by: Yishai Hadas <yishaih@nvidia.com> Link: https://lore.kernel.org/r/7-v4-9ea22c5e6afb+1adf-vfio_reflck_jgg@nvidia.com Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
2021-08-11vfio: Introduce a vfio_uninit_group_dev() API callMax Gurtovoy1-2/+5
This pairs with vfio_init_group_dev() and allows undoing any state that is stored in the vfio_device unrelated to registration. Add appropriately placed calls to all the drivers. The following patch will use this to add pre-registration state for the device set. Signed-off-by: Max Gurtovoy <mgurtovoy@nvidia.com> Reviewed-by: Cornelia Huck <cohuck@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com> Link: https://lore.kernel.org/r/3-v4-9ea22c5e6afb+1adf-vfio_reflck_jgg@nvidia.com Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
2021-06-15vfio/platform: remove unneeded parent_module attributeMax Gurtovoy3-3/+0
The vfio core driver is now taking refcount on the provider drivers, remove redundant parent_module attribute from vfio_platform_device structure. Signed-off-by: Max Gurtovoy <mgurtovoy@nvidia.com> Acked-by: Eric Auger <eric.auger@redhat.com> Link: https://lore.kernel.org/r/20210518192133.59195-3-mgurtovoy@nvidia.com Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
2021-06-15vfio: centralize module refcount in subsystem layerMax Gurtovoy1-6/+0
Remove code duplication and move module refcounting to the subsystem module. Signed-off-by: Max Gurtovoy <mgurtovoy@nvidia.com> Reviewed-by: Eric Auger <eric.auger@redhat.com> Link: https://lore.kernel.org/r/20210518192133.59195-2-mgurtovoy@nvidia.com Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
2021-05-24vfio/platform: fix module_put call in error flowMax Gurtovoy1-1/+1
The ->parent_module is the one that use in try_module_get. It should also be the one the we use in module_put during vfio_platform_open(). Fixes: 32a2d71c4e80 ("vfio: platform: introduce vfio-platform-base module") Signed-off-by: Max Gurtovoy <mgurtovoy@nvidia.com> Message-Id: <20210518192133.59195-1-mgurtovoy@nvidia.com> Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
2021-04-06Merge branches 'v5.13/vfio/embed-vfio_device', 'v5.13/vfio/misc' and ↵Alex Williamson1-1/+1
'v5.13/vfio/nvlink' into v5.13/vfio/next Spelling fixes merged with file deletion. Conflicts: drivers/vfio/pci/vfio_pci_nvlink2.c Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
2021-04-06vfio: Remove device_data from the vfio bus driver APIJason Gunthorpe1-1/+1
There are no longer any users, so it can go away. Everything is using container_of now. Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Kevin Tian <kevin.tian@intel.com> Reviewed-by: Cornelia Huck <cohuck@redhat.com> Reviewed-by: Max Gurtovoy <mgurtovoy@nvidia.com> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com> Message-Id: <14-v3-225de1400dfc+4e074-vfio1_jgg@nvidia.com> Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
2021-04-06vfio: Make vfio_device_ops pass a 'struct vfio_device *' instead of 'void *'Jason Gunthorpe1-13/+20
This is the standard kernel pattern, the ops associated with a struct get the struct pointer in for typesafety. The expected design is to use container_of to cleanly go from the subsystem level type to the driver level type without having any type erasure in a void *. Reviewed-by: Dan Williams <dan.j.williams@intel.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Cornelia Huck <cohuck@redhat.com> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com> Message-Id: <12-v3-225de1400dfc+4e074-vfio1_jgg@nvidia.com> Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
2021-04-06vfio/platform: Use vfio_init/register/unregister_group_devJason Gunthorpe4-31/+25
platform already allocates a struct vfio_platform_device with exactly the same lifetime as vfio_device, switch to the new API and embed vfio_device in vfio_platform_device. Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Cornelia Huck <cohuck@redhat.com> Acked-by: Eric Auger <eric.auger@redhat.com> Tested-by: Eric Auger <eric.auger@redhat.com> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com> Message-Id: <4-v3-225de1400dfc+4e074-vfio1_jgg@nvidia.com> Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
2021-04-06vfio/platform: Fix spelling mistake "registe" -> "register"Zhen Lei1-1/+1
There is a spelling mistake in a comment, fix it. Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com> Acked-by: Eric Auger <eric.auger@redhat.com> Message-Id: <20210326083528.1329-5-thunder.leizhen@huawei.com> Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
2021-03-16ARM: amba: Allow some ARM_AMBA users to compile with COMPILE_TESTJason Gunthorpe1-1/+1
CONFIG_VFIO_AMBA has a light use of AMBA, adding some inline fallbacks when AMBA is disabled will allow it to be compiled under COMPILE_TEST and make VFIO easier to maintain. Signed-off-by: Jason Gunthorpe <jgg@nvidia.com> Message-Id: <3-v1-df057e0f92c3+91-vfio_arm_compile_test_jgg@nvidia.com> Reviewed-by: Eric Auger <eric.auger@redhat.com> Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
2021-03-16vfio-platform: Add COMPILE_TEST to VFIO_PLATFORMJason Gunthorpe1-1/+1
x86 can build platform bus code too, so vfio-platform and all the platform reset implementations compile successfully on x86. Signed-off-by: Jason Gunthorpe <jgg@nvidia.com> Message-Id: <2-v1-df057e0f92c3+91-vfio_arm_compile_test_jgg@nvidia.com> Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
2021-02-02amba: Make the remove callback return voidUwe Kleine-König1-2/+1
All amba drivers return 0 in their remove callback. Together with the driver core ignoring the return value anyhow, it doesn't make sense to return a value here. Change the remove prototype to return void, which makes it explicit that returning an error value doesn't work as expected. This simplifies changing the core remove callback to return void, too. Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org> Reviewed-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Acked-by: Krzysztof Kozlowski <krzk@kernel.org> # for drivers/memory Acked-by: Mark Brown <broonie@kernel.org> Acked-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Suzuki K Poulose <suzuki.poulose@arm.com> # for hwtracing/coresight Acked-By: Vinod Koul <vkoul@kernel.org> # for dmaengine Acked-by: Guenter Roeck <linux@roeck-us.net> # for watchdog Acked-by: Wolfram Sang <wsa@kernel.org> # for I2C Acked-by: Takashi Iwai <tiwai@suse.de> # for sound Acked-by: Vladimir Zapolskiy <vz@mleia.com> # for memory/pl172 Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Link: https://lore.kernel.org/r/20210126165835.687514-5-u.kleine-koenig@pengutronix.de Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
2021-02-02vfio: platform: simplify device removalUwe Kleine-König1-9/+5
vfio_platform_remove_common() cannot return non-NULL in vfio_amba_remove() as the latter is only called if vfio_amba_probe() returned success. Diagnosed-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Eric Auger <eric.auger@redhat.com> Link: https://lore.kernel.org/r/20210126165835.687514-4-u.kleine-koenig@pengutronix.de Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
2020-12-10vfio: platform: Switch to use platform_get_mem_or_io()Andy Shevchenko1-12/+1
Switch to use new platform_get_mem_or_io() instead of home grown analogue. Cc: Alex Williamson <alex.williamson@redhat.com> Cc: Cornelia Huck <cohuck@redhat.com> Cc: kvm@vger.kernel.org Acked-by: Eric Auger <eric.auger@redhat.com> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Link: https://lore.kernel.org/r/20201209203642.27648-2-andriy.shevchenko@linux.intel.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-11-03vfio: platform: fix reference leak in vfio_platform_openZhang Qilong1-2/+1
pm_runtime_get_sync() will increment pm usage counter even it failed. Forgetting to call pm_runtime_put will result in reference leak in vfio_platform_open, so we should fix it. Signed-off-by: Zhang Qilong <zhangqilong3@huawei.com> Acked-by: Eric Auger <eric.auger@redhat.com> Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
2020-03-24vfio: platform: Switch to platform_get_irq_optional()Eric Auger1-1/+1
Since commit 7723f4c5ecdb ("driver core: platform: Add an error message to platform_get_irq*()"), platform_get_irq() calls dev_err() on an error. As we enumerate all interrupts until platform_get_irq() fails, we now systematically get a message such as: "vfio-platform fff51000.ethernet: IRQ index 3 not found" which is a false positive. Let's use platform_get_irq_optional() instead. Signed-off-by: Eric Auger <eric.auger@redhat.com> Cc: stable@vger.kernel.org # v5.3+ Reviewed-by: Andre Przywara <andre.przywara@arm.com> Tested-by: Andre Przywara <andre.przywara@arm.com> Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
2020-02-04Merge tag 'vfio-v5.6-rc1' of git://github.com/awilliam/linux-vfioLinus Torvalds1-2/+2
Pull VFIO updates from Alex Williamson: - Fix nvlink error path (Alexey Kardashevskiy) - Update nvlink and spapr to use mmgrab() (Julia Lawall) - Update static declaration (Ben Dooks) - Annotate __iomem to fix sparse warnings (Ben Dooks) * tag 'vfio-v5.6-rc1' of git://github.com/awilliam/linux-vfio: vfio: platform: fix __iomem in vfio_platform_amdxgbe.c vfio/mdev: make create attribute static vfio/spapr_tce: use mmgrab vfio: vfio_pci_nvlink2: use mmgrab vfio/spapr/nvlink2: Skip unpinning pages on error exit
2020-01-09vfio: platform: fix __iomem in vfio_platform_amdxgbe.cBen Dooks (Codethink)1-2/+2
The ioaddr should have __iomem marker on it, so add that to fix the following sparse warnings: drivers/vfio/platform/reset/vfio_platform_amdxgbe.c:33:44: warning: incorrect type in argument 2 (different address spaces) drivers/vfio/platform/reset/vfio_platform_amdxgbe.c:33:44: expected void volatile [noderef] <asn:2> *addr drivers/vfio/platform/reset/vfio_platform_amdxgbe.c:33:44: got void * drivers/vfio/platform/reset/vfio_platform_amdxgbe.c:34:33: warning: incorrect type in argument 1 (different address spaces) drivers/vfio/platform/reset/vfio_platform_amdxgbe.c:34:33: expected void const volatile [noderef] <asn:2> *addr drivers/vfio/platform/reset/vfio_platform_amdxgbe.c:34:33: got void * drivers/vfio/platform/reset/vfio_platform_amdxgbe.c:44:44: warning: incorrect type in argument 2 (different address spaces) drivers/vfio/platform/reset/vfio_platform_amdxgbe.c:44:44: expected void volatile [noderef] <asn:2> *addr drivers/vfio/platform/reset/vfio_platform_amdxgbe.c:44:44: got void * drivers/vfio/platform/reset/vfio_platform_amdxgbe.c:45:33: warning: incorrect type in argument 2 (different address spaces) drivers/vfio/platform/reset/vfio_platform_amdxgbe.c:45:33: expected void volatile [noderef] <asn:2> *addr drivers/vfio/platform/reset/vfio_platform_amdxgbe.c:45:33: got void * drivers/vfio/platform/reset/vfio_platform_amdxgbe.c:69:41: warning: incorrect type in argument 1 (different address spaces) drivers/vfio/platform/reset/vfio_platform_amdxgbe.c:69:41: expected void *ioaddr drivers/vfio/platform/reset/vfio_platform_amdxgbe.c:69:41: got void [noderef] <asn:2> *ioaddr drivers/vfio/platform/reset/vfio_platform_amdxgbe.c:71:30: warning: incorrect type in argument 1 (different address spaces) drivers/vfio/platform/reset/vfio_platform_amdxgbe.c:71:30: expected void *ioaddr drivers/vfio/platform/reset/vfio_platform_amdxgbe.c:71:30: got void [noderef] <asn:2> *ioaddr drivers/vfio/platform/reset/vfio_platform_amdxgbe.c:76:49: warning: incorrect type in argument 1 (different address spaces) drivers/vfio/platform/reset/vfio_platform_amdxgbe.c:76:49: expected void *ioaddr drivers/vfio/platform/reset/vfio_platform_amdxgbe.c:76:49: got void [noderef] <asn:2> *ioaddr drivers/vfio/platform/reset/vfio_platform_amdxgbe.c:85:37: warning: incorrect type in argument 1 (different address spaces) drivers/vfio/platform/reset/vfio_platform_amdxgbe.c:85:37: expected void *ioaddr drivers/vfio/platform/reset/vfio_platform_amdxgbe.c:85:37: got void [noderef] <asn:2> *ioaddr drivers/vfio/platform/reset/vfio_platform_amdxgbe.c:87:30: warning: incorrect type in argument 1 (different address spaces) drivers/vfio/platform/reset/vfio_platform_amdxgbe.c:87:30: expected void *ioaddr drivers/vfio/platform/reset/vfio_platform_amdxgbe.c:87:30: got void [noderef] <asn:2> *ioaddr drivers/vfio/platform/reset/vfio_platform_amdxgbe.c:90:30: warning: incorrect type in argument 1 (different address spaces) drivers/vfio/platform/reset/vfio_platform_amdxgbe.c:90:30: expected void *ioaddr drivers/vfio/platform/reset/vfio_platform_amdxgbe.c:90:30: got void [noderef] <asn:2> *ioaddr drivers/vfio/platform/reset/vfio_platform_amdxgbe.c:93:30: warning: incorrect type in argument 1 (different address spaces) drivers/vfio/platform/reset/vfio_platform_amdxgbe.c:93:30: expected void *ioaddr drivers/vfio/platform/reset/vfio_platform_amdxgbe.c:93:30: got void [noderef] <asn:2> *ioaddr Signed-off-by: Ben Dooks (Codethink) <ben.dooks@codethink.co.uk> Acked-by: Eric Auger <eric.auger@redhat.com> Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
2020-01-06remove ioremap_nocache and devm_ioremap_nocacheChristoph Hellwig4-6/+6
ioremap has provided non-cached semantics by default since the Linux 2.6 days, so remove the additional ioremap_nocache interface. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Arnd Bergmann <arnd@arndb.de>
2019-05-30treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 201Thomas Gleixner2-24/+2
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 you should have received a copy of the gnu general public license along with this program if not see http www gnu org licenses extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 228 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Steve Winslow <swinslow@gmail.com> Reviewed-by: Richard Fontana <rfontana@redhat.com> Reviewed-by: Alexios Zavras <alexios.zavras@intel.com> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190528171438.107155473@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-30treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174Thomas Gleixner5-45/+5
Based on 1 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 distributed in the hope that 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 655 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Richard Fontana <rfontana@redhat.com> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070034.575739538@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-21treewide: Add SPDX license identifier - Makefile/KconfigThomas Gleixner2-0/+2
Add SPDX license identifiers to all Make/Kconfig files which: - Have no license information of any form These files fall under the project license, GPL v2 only. The resulting SPDX license identifier is: GPL-2.0-only Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-04-22vfio: Use dev_printk() when possibleBjorn Helgaas2-7/+10
Use dev_printk() when possible to make messages consistent with other device-related messages. Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Acked-by: Eric Auger <eric.auger@redhat.com> Reviewed-by: Eric Auger <eric.auger@redhat.com> Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
2019-02-05vfio: platform: reset: fix up include directives to remove ccflags-yMasahiro Yamada4-5/+3
For the include directive with double-quotes "", the preprocessor searches the header in the relative path to the current file. Fix them up, and remove the header search path option. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Acked-by: Eric Auger <eric.auger@redhat.com> Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
2018-06-08vfio: platform: Fix using devices in PM DomainsGeert Uytterhoeven1-0/+10
If a device is part of a PM Domain (e.g. power and/or clock domain), its power state is managed using Runtime PM. Without Runtime PM, the device may not be powered up or clocked, causing subtle failures, crashes, or system lock-ups when the device is accessed by the guest. Fix this by adding Runtime PM support, powering the device when the VFIO device is opened by the guest. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: Simon Horman <horms+renesas@verge.net.au> Acked-by: Eric Auger <eric.auger@redhat.com> Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
2018-06-08vfio: platform: Make printed error messages more consistentGeert Uytterhoeven1-3/+2
- Capitalize the first word of error messages, - Unwrap statements that fit on a single line, - Use "VFIO" instead of "vfio" as the error message prefix. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: Eric Auger <eric.auger@redhat.com> Acked-by: Eric Auger <eric.auger@redhat.com> Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
2018-06-08vfio: platform: Fix reset module leak in error pathGeert Uytterhoeven1-5/+10
If the IOMMU group setup fails, the reset module is not released. Fixes: b5add544d677d363 ("vfio, platform: make reset driver a requirement by default") Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: Eric Auger <eric.auger@redhat.com> Reviewed-by: Simon Horman <horms+renesas@verge.net.au> Acked-by: Eric Auger <eric.auger@redhat.com> Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
2017-11-15Merge tag 'vfio-v4.15-rc1' of git://github.com/awilliam/linux-vfioLinus Torvalds3-0/+123
Pull VFIO updates from Alex Williamson: - Virtualize PCI MPS and MRRS registers - Avoid soft lockups on SPAPR when clearing TCE - Broadcom FlexRM platform device support - Samples driver cleanup & type1 integer overflow fix * tag 'vfio-v4.15-rc1' of git://github.com/awilliam/linux-vfio: vfio: platform: reset: Add Broadcom FlexRM reset module vfio/type1: silence integer overflow warning vfio-mdev/samples: make mdev_fops const and static vfio/spapr: Add cond_resched() for huge updates vfio/pci: Virtualize Maximum Read Request Size vfio/pci: Virtualize Maximum Payload Size
2017-11-02License cleanup: add SPDX GPL-2.0 license identifier to files with no licenseGreg Kroah-Hartman2-0/+2
Many source files in the tree are missing licensing information, which makes it harder for compliance tools to determine the correct license. By default all files without license information are under the default license of the kernel, which is GPL version 2. Update the files which contain no license information with the 'GPL-2.0' SPDX license identifier. The SPDX identifier is a legally binding shorthand, which can be used instead of the full boiler plate text. This patch is based on work done by Thomas Gleixner and Kate Stewart and Philippe Ombredanne. How this work was done: Patches were generated and checked against linux-4.14-rc6 for a subset of the use cases: - file had no licensing information it it. - file was a */uapi/* one with no licensing information in it, - file was a */uapi/* one with existing licensing information, Further patches will be generated in subsequent months to fix up cases where non-standard license headers were used, and references to license had to be inferred by heuristics based on keywords. The analysis to determine which SPDX License Identifier to be applied to a file was done in a spreadsheet of side by side results from of the output of two independent scanners (ScanCode & Windriver) producing SPDX tag:value files created by Philippe Ombredanne. Philippe prepared the base worksheet, and did an initial spot review of a few 1000 files. The 4.13 kernel was the starting point of the analysis with 60,537 files assessed. Kate Stewart did a file by file comparison of the scanner results in the spreadsheet to determine which SPDX license identifier(s) to be applied to the file. She confirmed any determination that was not immediately clear with lawyers working with the Linux Foundation. Criteria used to select files for SPDX license identifier tagging was: - Files considered eligible had to be source code files. - Make and config files were included as candidates if they contained >5 lines of source - File already had some variant of a license header in it (even if <5 lines). All documentation files were explicitly excluded. The following heuristics were used to determine which SPDX license identifiers to apply. - when both scanners couldn't find any license traces, file was considered to have no license information in it, and the top level COPYING file license applied. For non */uapi/* files that summary was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 11139 and resulted in the first patch in this series. If that file was a */uapi/* path one, it was "GPL-2.0 WITH Linux-syscall-note" otherwise it was "GPL-2.0". Results of that was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 WITH Linux-syscall-note 930 and resulted in the second patch in this series. - if a file had some form of licensing information in it, and was one of the */uapi/* ones, it was denoted with the Linux-syscall-note if any GPL family license was found in the file or had no licensing in it (per prior point). Results summary: SPDX license identifier # files ---------------------------------------------------|------ GPL-2.0 WITH Linux-syscall-note 270 GPL-2.0+ WITH Linux-syscall-note 169 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause) 21 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) 17 LGPL-2.1+ WITH Linux-syscall-note 15 GPL-1.0+ WITH Linux-syscall-note 14 ((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause) 5 LGPL-2.0+ WITH Linux-syscall-note 4 LGPL-2.1 WITH Linux-syscall-note 3 ((GPL-2.0 WITH Linux-syscall-note) OR MIT) 3 ((GPL-2.0 WITH Linux-syscall-note) AND MIT) 1 and that resulted in the third patch in this series. - when the two scanners agreed on the detected license(s), that became the concluded license(s). - when there was disagreement between the two scanners (one detected a license but the other didn't, or they both detected different licenses) a manual inspection of the file occurred. - In most cases a manual inspection of the information in the file resulted in a clear resolution of the license that should apply (and which scanner probably needed to revisit its heuristics). - When it was not immediately clear, the license identifier was confirmed with lawyers working with the Linux Foundation. - If there was any question as to the appropriate license identifier, the file was flagged for further research and to be revisited later in time. In total, over 70 hours of logged manual review was done on the spreadsheet to determine the SPDX license identifiers to apply to the source files by Kate, Philippe, Thomas and, in some cases, confirmation by lawyers working with the Linux Foundation. Kate also obtained a third independent scan of the 4.13 code base from FOSSology, and compared selected files where the other two scanners disagreed against that SPDX file, to see if there was new insights. The Windriver scanner is based on an older version of FOSSology in part, so they are related. Thomas did random spot checks in about 500 files from the spreadsheets for the uapi headers and agreed with SPDX license identifier in the files he inspected. For the non-uapi files Thomas did random spot checks in about 15000 files. In initial set of patches against 4.14-rc6, 3 files were found to have copy/paste license identifier errors, and have been fixed to reflect the correct identifier. Additionally Philippe spent 10 hours this week doing a detailed manual inspection and review of the 12,461 patched files from the initial patch version early this week with: - a full scancode scan run, collecting the matched texts, detected license ids and scores - reviewing anything where there was a license detected (about 500+ files) to ensure that the applied SPDX license was correct - reviewing anything where there was no detection but the patch license was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied SPDX license was correct This produced a worksheet with 20 files needing minor correction. This worksheet was then exported into 3 different .csv files for the different types of files to be modified. These .csv files were then reviewed by Greg. Thomas wrote a script to parse the csv files and add the proper SPDX tag to the file, in the format that the file expected. This script was further refined by Greg based on the output to detect more types of files automatically and to distinguish between header and source .c files (which need different comment types.) Finally Greg ran the script using the .csv files to generate the patches. Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-10-20vfio: platform: reset: Add Broadcom FlexRM reset moduleAnup Patel3-0/+123
This patch adds Broadcom FlexRM low-level reset for VFIO platform. It will do the following: 1. Disable/Deactivate each FlexRM ring 2. Flush each FlexRM ring The cleanup sequence for FlexRM rings is adapted from Broadcom FlexRM mailbox driver. Signed-off-by: Anup Patel <anup.patel@broadcom.com> Reviewed-by: Oza Oza <oza.oza@broadcom.com> Reviewed-by: Scott Branden <scott.branden@broadcom.com> Reviewed-by: Eric Auger <eric.auger@redhat.com> Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
2017-08-30vfio: platform: constify amba_idArvind Yadav1-1/+1
amba_id are not supposed to change at runtime. All functions working with const amba_id. So mark the non-const structs as const. Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com> Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
2016-11-17vfio_platform: Updated to use vfio_set_irqs_validate_and_prepare()Kirti Wankhede1-23/+8
Updated vfio_platform_common.c file to use vfio_set_irqs_validate_and_prepare() Signed-off-by: Kirti Wankhede <kwankhede@nvidia.com> Signed-off-by: Neo Jia <cjia@nvidia.com> Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
2016-09-14vfio: platform: mark symbols static where possibleBaoyou Xie3-5/+5
We get a few warnings when building kernel with W=1: drivers/vfio/platform/vfio_platform_common.c:76:5: warning: no previous prototype for 'vfio_platform_acpi_call_reset' [-Wmissing-prototypes] drivers/vfio/platform/vfio_platform_common.c:98:6: warning: no previous prototype for 'vfio_platform_acpi_has_reset' [-Wmissing-prototypes] drivers/vfio/platform/vfio_platform_common.c:640:5: warning: no previous prototype for 'vfio_platform_of_probe' [-Wmissing-prototypes] drivers/vfio/platform/reset/vfio_platform_amdxgbe.c:59:5: warning: no previous prototype for 'vfio_platform_amdxgbe_reset' [-Wmissing-prototypes] drivers/vfio/platform/reset/vfio_platform_calxedaxgmac.c:60:5: warning: no previous prototype for 'vfio_platform_calxedaxgmac_reset' [-Wmissing-prototypes] .... In fact, these functions are only used in the file in which they are declared and don't need a declaration, but can be made static. so this patch marks these functions with 'static'. Signed-off-by: Baoyou Xie <baoyou.xie@linaro.org> Acked-by: Arnd Bergmann <arnd@arndb.de> Reviewed-by: Eric Auger <eric.auger@redhat.com> Reviewed-by: Baptiste Reynal <b.reynal@virtualopensystems.com> Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
2016-07-19vfio: platform: check reset call return code during releaseSinan Kaya1-1/+9
Release call is ignoring the return code from reset call and can potentially continue even though reset call failed. If reset_required module parameter is set, this patch is going to validate the return code and will cause stack dump with WARN_ON and warn the user of failure. Signed-off-by: Sinan Kaya <okaya@codeaurora.org> Reviewed-by: Eric Auger <eric.auger@redhat.com> Reviewed-by: Baptiste Reynal <b.reynal@virtualopensystems.com> Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
2016-07-19vfio: platform: check reset call return code during openSinan Kaya1-1/+10
Open call is ignoring the return code from reset call and can potentially continue even though reset call failed. If reset_required module parameter is set, this patch is going to validate the return code and will abort open if reset fails. Signed-off-by: Sinan Kaya <okaya@codeaurora.org> Reviewed-by: Baptiste Reynal <b.reynal@virtualopensystems.com> Reviewed-by: Eric Auger <eric.auger@redhat.com> Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
2016-07-19vfio, platform: make reset driver a requirement by defaultSinan Kaya4-4/+19
The code was allowing platform devices to be used without a supporting VFIO reset driver. The hardware can be left in some inconsistent state after a guest machine abort. The reset driver will put the hardware back to safe state and disable interrupts before returning the control back to the host machine. Adding a new reset_required kernel module option to platform VFIO drivers. The default value is true for the DT and ACPI based drivers. The reset requirement value for AMBA drivers is set to false and is unchangeable to maintain the existing functionality. New requirements are: 1. A reset function needs to be implemented by the corresponding driver via DT/ACPI. 2. The reset function needs to be discovered via DT/ACPI. The probe of the driver will fail if any of the above conditions are not satisfied. Signed-off-by: Sinan Kaya <okaya@codeaurora.org> Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
2016-07-19vfio: platform: call _RST method when using ACPISinan Kaya1-1/+49
The device tree code checks for the presence of a reset driver and calls the of_reset function pointer by looking up the reset driver as a module. ACPI defines _RST method to perform device level reset. After the _RST method is executed, the OS can resume using the device. _RST method is expected to stop DMA transfers and IRQs. This patch introduces two functions as vfio_platform_acpi_has_reset and vfio_platform_acpi_call_reset. The has reset method is used to declare reset capability via the ioctl flag VFIO_DEVICE_FLAGS_RESET. The call reset function is used to execute the _RST ACPI method. Signed-off-by: Sinan Kaya <okaya@codeaurora.org> Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
2016-07-19vfio: platform: add extra debug info argument to call resetSinan Kaya1-4/+5
Getting ready to bring out extra debug information to the caller so that more verbose information can be printed when an error is observed. Signed-off-by: Sinan Kaya <okaya@codeaurora.org> Reviewed-by: Baptiste Reynal <b.reynal@virtualopensystems.com> Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
2016-07-19vfio: platform: add support for ACPI probeSinan Kaya2-5/+60
The code is using the compatible DT string to associate a reset driver with the actual device itself. The compatible string does not exist on ACPI based systems. HID is the unique identifier for a device driver instead. Signed-off-by: Sinan Kaya <okaya@codeaurora.org> Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
2016-07-19vfio: platform: determine reset capabilitySinan Kaya1-1/+6
Creating a new function to determine if this driver supports reset function or not. This is an attempt to abstract device tree calls from the rest of the code. Signed-off-by: Sinan Kaya <okaya@codeaurora.org> Reviewed-by: Eric Auger <eric.auger@linaro.org> Reviewed-by: Baptiste Reynal <b.reynal@virtualopensystems.com> Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
2016-07-19vfio: platform: move reset call to a common functionSinan Kaya1-16/+14
The reset call sequence seems to replicate itself multiple times across the file. Grouping them together for maintenance reasons. Signed-off-by: Sinan Kaya <okaya@codeaurora.org> Reviewed-by: Eric Auger <eric.auger@linaro.org> Reviewed-by: Baptiste Reynal <b.reynal@virtualopensystems.com> Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
2016-07-19vfio: platform: rename reset functionSinan Kaya2-18/+18
Renaming the reset function to of_reset as it is only used by the device tree based platforms. Signed-off-by: Sinan Kaya <okaya@codeaurora.org> Reviewed-by: Eric Auger <eric.auger@linaro.org> Reviewed-by: Baptiste Reynal <b.reynal@virtualopensystems.com> Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
2016-06-23vfio: platform: support No-IOMMU modePeng Fan1-3/+3
The vfio No-IOMMU mode was supported by this 'commit 03a76b60f8ba2797 ("vfio: Include No-IOMMU mode")', but it only support vfio-pci. Using vfio_iommu_group_get/put, but not iommu_group_get/put, the platform devices can be exposed to userspace with CONFIG_VFIO_NOIOMMU and the "enable_unsafe_noiommu_mode" option enabled. From 'commit 03a76b60f8ba2797 ("vfio: Include No-IOMMU mode")', "This should make it very clear that this mode is not safe. Additionally, CAP_SYS_RAWIO privileges are necessary to work with groups and containers using this mode. Groups making use of this support are named /dev/vfio/noiommu-$GROUP and can only make use of the special VFIO_NOIOMMU_IOMMU for the container. Use of this mode, specifically binding a device without a native IOMMU group to a VFIO bus driver will taint the kernel and should therefore not be considered supported." Signed-off-by: Peng Fan <van.freenix@gmail.com> Cc: Eric Auger <eric.auger@linaro.org> Cc: Baptiste Reynal <b.reynal@virtualopensystems.com> Cc: Alex Williamson <alex.williamson@redhat.com> Reviewed-by: Eric Auger <eric.auger@redhat.com> Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-19 10:17:00 +0300