#ifndef __ENCRYPTED_KEY_H #define __ENCRYPTED_KEY_H #define ENCRYPTED_DEBUG 0 #if defined(CONFIG_TRUSTED_KEYS) || \ (defined(CONFIG_TRUSTED_KEYS_MODULE) && defined(CONFIG_ENCRYPTED_KEYS_MODULE)) extern struct key *request_trusted_key(const char *trusted_desc, const u8 **master_key, size_t *master_keylen); #else static inline struct key *request_trusted_key(const char *trusted_desc, const u8 **master_key, size_t *master_keylen) { return ERR_PTR(-EOPNOTSUPP); } #endif #if ENCRYPTED_DEBUG static inline void dump_master_key(const u8 *master_key, size_t master_keylen) { print_hex_dump(KERN_ERR, "master key: ", DUMP_PREFIX_NONE, 32, 1, master_key, master_keylen, 0); } static inline void dump_decrypted_data(struct encrypted_key_payload *epayload) { print_hex_dump(KERN_ERR, "decrypted data: ", DUMP_PREFIX_NONE, 32, 1, epayload->decrypted_data, epayload->decrypted_datalen, 0); } static inline void dump_encrypted_data(struct encrypted_key_payload *epayload, unsigned int encrypted_datalen) { print_hex_dump(KERN_ERR, "encrypted data: ", DUMP_PREFIX_NONE, 32, 1, epayload->encrypted_data, encrypted_datalen, 0); } static inline void dump_hmac(const char *str, const u8 *digest, unsigned int hmac_size) { if (str) pr_info("encrypted_key: %s", str); print_hex_dump(KERN_ERR, "hmac: ", DUMP_PREFIX_NONE, 32, 1, digest, hmac_size, 0); } #else static inline void dump_master_key(const u8 *master_key, size_t master_keylen) { } static inline void dump_decrypted_data(struct encrypted_key_payload *epayload) { } static inline void dump_encrypted_data(struct encrypted_key_payload *epayload, unsigned int encrypted_datalen) { } static inline void dump_hmac(const char *str, const u8 *digest, unsigned int hmac_size) { } #endif #endif class='active' href='/cgit.cgi/linux/net-next.git/commit/include/pcmcia/ds.h?id=c8f325a59cfc718d13a50fbc746ed9b415c25e92'>commitdiff
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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 /include/pcmcia/ds.h
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 'include/pcmcia/ds.h')