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path: root/net/ieee802154/Kconfig
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menuconfig IEEE802154
	tristate "IEEE Std 802.15.4 Low-Rate Wireless Personal Area Networks support"
	---help---
	  IEEE Std 802.15.4 defines a low data rate, low power and low
	  complexity short range wireless personal area networks. It was
	  designed to organise networks of sensors, switches, etc automation
	  devices. Maximum allowed data rate is 250 kb/s and typical personal
	  operating space around 10m.

	  Say Y here to compile LR-WPAN support into the kernel or say M to
	  compile it as modules.

if IEEE802154

config IEEE802154_NL802154_EXPERIMENTAL
	bool "IEEE 802.15.4 experimental netlink support"
	---help---
	  Adds experimental netlink support for nl802154.

config IEEE802154_SOCKET
	tristate "IEEE 802.15.4 socket interface"
	default y
	---help---
	  Socket interface for IEEE 802.15.4. Contains DGRAM sockets interface
	  for 802.15.4 dataframes. Also RAW socket interface to build MAC
	  header from userspace.

source "net/ieee802154/6lowpan/Kconfig"

endif
6ed9b415c25e92'>tools/perf/arch/arm/tests/regs_load.S 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/perf/arch/arm/tests/regs_load.S')