#ifndef DT_BINDINGS_MEMORY_TEGRA124_MC_H #define DT_BINDINGS_MEMORY_TEGRA124_MC_H #define TEGRA_SWGROUP_PTC 0 #define TEGRA_SWGROUP_DC 1 #define TEGRA_SWGROUP_DCB 2 #define TEGRA_SWGROUP_AFI 3 #define TEGRA_SWGROUP_AVPC 4 #define TEGRA_SWGROUP_HDA 5 #define TEGRA_SWGROUP_HC 6 #define TEGRA_SWGROUP_MSENC 7 #define TEGRA_SWGROUP_PPCS 8 #define TEGRA_SWGROUP_SATA 9 #define TEGRA_SWGROUP_VDE 10 #define TEGRA_SWGROUP_MPCORELP 11 #define TEGRA_SWGROUP_MPCORE 12 #define TEGRA_SWGROUP_ISP2 13 #define TEGRA_SWGROUP_XUSB_HOST 14 #define TEGRA_SWGROUP_XUSB_DEV 15 #define TEGRA_SWGROUP_ISP2B 16 #define TEGRA_SWGROUP_TSEC 17 #define TEGRA_SWGROUP_A9AVP 18 #define TEGRA_SWGROUP_GPU 19 #define TEGRA_SWGROUP_SDMMC1A 20 #define TEGRA_SWGROUP_SDMMC2A 21 #define TEGRA_SWGROUP_SDMMC3A 22 #define TEGRA_SWGROUP_SDMMC4A 23 #define TEGRA_SWGROUP_VIC 24 #define TEGRA_SWGROUP_VI 25 #endif form'>
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/mac80211/mesh_ps.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/mac80211/mesh_ps.c')