/* * * Copyright (c) 2009 Nuvoton technology corporation * All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * Author: * Wang Qiang(rurality.linux@gmail.com) 2009/12/16 */ #ifndef __NUC900FB_H #define __NUC900FB_H #include #include enum nuc900_lcddrv_type { LCDDRV_NUC910, LCDDRV_NUC930, LCDDRV_NUC932, LCDDRV_NUC950, LCDDRV_NUC960, }; #define PALETTE_BUFFER_SIZE 256 #define PALETTE_BUFF_CLEAR (0x80000000) /* entry is clear/invalid */ struct nuc900fb_info { struct device *dev; struct clk *clk; struct resource *mem; void __iomem *io; void __iomem *irq_base; int drv_type; struct nuc900fb_hw regs; unsigned long clk_rate; #ifdef CONFIG_CPU_FREQ struct notifier_block freq_transition; #endif /* keep these registers in case we need to re-write palette */ u32 palette_buffer[PALETTE_BUFFER_SIZE]; u32 pseudo_pal[16]; }; int nuc900fb_init(void); #endif /* __NUC900FB_H */ d='selected'>nds-private-remove net-next plumbingsTobias Klauser
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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 /net/netlabel/netlabel_mgmt.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 'net/netlabel/netlabel_mgmt.c')