/* * intel_soc_dts_iosf.h * Copyright (c) 2015, Intel Corporation. * * 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. * */ #ifndef _INTEL_SOC_DTS_IOSF_CORE_H #define _INTEL_SOC_DTS_IOSF_CORE_H #include /* DTS0 and DTS 1 */ #define SOC_MAX_DTS_SENSORS 2 enum intel_soc_dts_interrupt_type { INTEL_SOC_DTS_INTERRUPT_NONE, INTEL_SOC_DTS_INTERRUPT_APIC, INTEL_SOC_DTS_INTERRUPT_MSI, INTEL_SOC_DTS_INTERRUPT_SCI, INTEL_SOC_DTS_INTERRUPT_SMI, }; struct intel_soc_dts_sensors; struct intel_soc_dts_sensor_entry { int id; u32 temp_mask; u32 temp_shift; u32 store_status; u32 trip_mask; u32 trip_count; enum thermal_trip_type trip_types[2]; struct thermal_zone_device *tzone; struct intel_soc_dts_sensors *sensors; }; struct intel_soc_dts_sensors { u32 tj_max; spinlock_t intr_notify_lock; struct mutex dts_update_lock; enum intel_soc_dts_interrupt_type intr_type; struct intel_soc_dts_sensor_entry soc_dts[SOC_MAX_DTS_SENSORS]; }; struct intel_soc_dts_sensors *intel_soc_dts_iosf_init( enum intel_soc_dts_interrupt_type intr_type, int trip_count, int read_only_trip_count); void intel_soc_dts_iosf_exit(struct intel_soc_dts_sensors *sensors); void intel_soc_dts_iosf_interrupt_handler( struct intel_soc_dts_sensors *sensors); int intel_soc_dts_iosf_add_read_only_critical_trip( struct intel_soc_dts_sensors *sensors, int critical_offset); #endif t-next.git/tree/drivers/usb/usbip/vhci_hcd.c?id=c8f325a59cfc718d13a50fbc746ed9b415c25e92'>treecommitdiff
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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 /drivers/usb/usbip/vhci_hcd.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 'drivers/usb/usbip/vhci_hcd.c')