# # 1-wire bus master configuration # menu "1-wire Bus Masters" config W1_MASTER_MATROX tristate "Matrox G400 transport layer for 1-wire" depends on PCI help Say Y here if you want to communicate with your 1-wire devices using Matrox's G400 GPIO pins. This support is also available as a module. If so, the module will be called matrox_w1. config W1_MASTER_DS2490 tristate "DS2490 USB <-> W1 transport layer for 1-wire" depends on USB help Say Y here if you want to have a driver for DS2490 based USB <-> W1 bridges, for example DS9490*. This support is also available as a module. If so, the module will be called ds2490. config W1_MASTER_DS2482 tristate "Maxim DS2482 I2C to 1-Wire bridge" depends on I2C help If you say yes here you get support for the Maxim DS2482 I2C to 1-Wire bridge. This driver can also be built as a module. If so, the module will be called ds2482. config W1_MASTER_MXC tristate "Freescale MXC 1-wire busmaster" depends on ARCH_MXC || COMPILE_TEST help Say Y here to enable MXC 1-wire host config W1_MASTER_DS1WM tristate "Maxim DS1WM 1-wire busmaster" help Say Y here to enable the DS1WM 1-wire driver, such as that in HP iPAQ devices like h5xxx, h2200, and ASIC3-based like hx4700. config W1_MASTER_GPIO tristate "GPIO 1-wire busmaster" depends on GPIOLIB help Say Y here if you want to communicate with your 1-wire devices using GPIO pins. This driver uses the GPIO API to control the wire. This support is also available as a module. If so, the module will be called w1-gpio. config HDQ_MASTER_OMAP tristate "OMAP HDQ driver" depends on ARCH_OMAP help Say Y here if you want support for the 1-wire or HDQ Interface on an OMAP processor. endmenu /linux/net-next.git/log/net/dccp/ackvec.c?h=nds-private-remove'>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 /net/dccp/ackvec.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/dccp/ackvec.c')