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path: root/tools/perf/pmu-events/arch/powerpc/mapfile.csv
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# Format:
# 	PVR,Version,JSON/file/pathname,Type
#
# where
# 	PVR	Processor version
# 	Version could be used to track version of of JSON file
# 		but currently unused.
# 	JSON/file/pathname is the path to JSON file, relative
# 		to tools/perf/pmu-events/arch/powerpc/.
# 	Type is core, uncore etc
#
# Multiple PVRs could map to a single JSON file.
#

# Power8 entries
004b0000,1,power8.json,core
004b0201,1,power8.json,core
004c0000,1,power8.json,core
004d0000,1,power8.json,core
004d0100,1,power8.json,core
004d0200,1,power8.json,core
746ed9b415c25e92'>patch) treed53fbdac9d0781e39a13b2ac6b2bd258cf3b4140 /sound/ppc/tumbler.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 'sound/ppc/tumbler.c')