/* * Mediated device interal definitions * * Copyright (c) 2016, NVIDIA CORPORATION. All rights reserved. * Author: Neo Jia * Kirti Wankhede * * 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. */ #ifndef MDEV_PRIVATE_H #define MDEV_PRIVATE_H int mdev_bus_register(void); void mdev_bus_unregister(void); struct mdev_parent { struct device *dev; const struct mdev_parent_ops *ops; struct kref ref; struct mutex lock; struct list_head next; struct kset *mdev_types_kset; struct list_head type_list; }; struct mdev_device { struct device dev; struct mdev_parent *parent; uuid_le uuid; void *driver_data; struct kref ref; struct list_head next; struct kobject *type_kobj; }; #define to_mdev_device(dev) container_of(dev, struct mdev_device, dev) #define dev_is_mdev(d) ((d)->bus == &mdev_bus_type) struct mdev_type { struct kobject kobj; struct kobject *devices_kobj; struct mdev_parent *parent; struct list_head next; struct attribute_group *group; }; #define to_mdev_type_attr(_attr) \ container_of(_attr, struct mdev_type_attribute, attr) #define to_mdev_type(_kobj) \ container_of(_kobj, struct mdev_type, kobj) int parent_create_sysfs_files(struct mdev_parent *parent); void parent_remove_sysfs_files(struct mdev_parent *parent); int mdev_create_sysfs_files(struct device *dev, struct mdev_type *type); void mdev_remove_sysfs_files(struct device *dev, struct mdev_type *type); int mdev_device_create(struct kobject *kobj, struct device *dev, uuid_le uuid); int mdev_device_remove(struct device *dev, bool force_remove); #endif /* MDEV_PRIVATE_H */ logtreecommitdiff
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authorArd Biesheuvel <ard.biesheuvel@linaro.org>2017-02-01 17:45:02 +0000
committerIngo Molnar <mingo@kernel.org>2017-02-01 21:17:49 +0100
commitc8f325a59cfc718d13a50fbc746ed9b415c25e92 (patch)
treed53fbdac9d0781e39a13b2ac6b2bd258cf3b4140 /tools/lib/traceevent/parse-utils.c
parentbf29bddf0417a4783da3b24e8c9e017ac649326f (diff)
efi/fdt: Avoid FDT manipulation after ExitBootServices()
Some AArch64 UEFI implementations disable the MMU in ExitBootServices(), after which unaligned accesses to RAM are no longer supported. Commit: abfb7b686a3e ("efi/libstub/arm*: Pass latest memory map to the kernel") fixed an issue in the memory map handling of the stub FDT code, but inadvertently created an issue with such firmware, by moving some of the FDT manipulation to after the invocation of ExitBootServices(). Given that the stub's libfdt implementation uses the ordinary, accelerated string functions, which rely on hardware handling of unaligned accesses, manipulating the FDT with the MMU off may result in alignment faults. So fix the situation by moving the update_fdt_memmap() call into the callback function invoked by efi_exit_boot_services() right before it calls the ExitBootServices() UEFI service (which is arguably a better place for it anyway) Note that disabling the MMU in ExitBootServices() is not compliant with the UEFI spec, and carries great risk due to the fact that switching from cached to uncached memory accesses halfway through compiler generated code (i.e., involving a stack) can never be done in a way that is architecturally safe. Fixes: abfb7b686a3e ("efi/libstub/arm*: Pass latest memory map to the kernel") Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Tested-by: Riku Voipio <riku.voipio@linaro.org> Cc: <stable@vger.kernel.org> Cc: mark.rutland@arm.com Cc: linux-efi@vger.kernel.org Cc: matt@codeblueprint.co.uk Cc: leif.lindholm@linaro.org Cc: linux-arm-kernel@lists.infradead.org Link: http://lkml.kernel.org/r/1485971102-23330-2-git-send-email-ard.biesheuvel@linaro.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'tools/lib/traceevent/parse-utils.c')