/* * Squashfs - a compressed read only filesystem for Linux * * Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008 * Phillip Lougher * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2, * or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. * * squashfs.h */ #define TRACE(s, args...) pr_debug("SQUASHFS: "s, ## args) #define ERROR(s, args...) pr_err("SQUASHFS error: "s, ## args) #define WARNING(s, args...) pr_warn("SQUASHFS: "s, ## args) /* block.c */ extern int squashfs_read_data(struct super_block *, u64, int, u64 *, struct squashfs_page_actor *); /* cache.c */ extern struct squashfs_cache *squashfs_cache_init(char *, int, int); extern void squashfs_cache_delete(struct squashfs_cache *); extern struct squashfs_cache_entry *squashfs_cache_get(struct super_block *, struct squashfs_cache *, u64, int); extern void squashfs_cache_put(struct squashfs_cache_entry *); extern int squashfs_copy_data(void *, struct squashfs_cache_entry *, int, int); extern int squashfs_read_metadata(struct super_block *, void *, u64 *, int *, int); extern struct squashfs_cache_entry *squashfs_get_fragment(struct super_block *, u64, int); extern struct squashfs_cache_entry *squashfs_get_datablock(struct super_block *, u64, int); extern void *squashfs_read_table(struct super_block *, u64, int); /* decompressor.c */ extern const struct squashfs_decompressor *squashfs_lookup_decompressor(int); extern void *squashfs_decompressor_setup(struct super_block *, unsigned short); /* decompressor_xxx.c */ extern void *squashfs_decompressor_create(struct squashfs_sb_info *, void *); extern void squashfs_decompressor_destroy(struct squashfs_sb_info *); extern int squashfs_decompress(struct squashfs_sb_info *, struct buffer_head **, int, int, int, struct squashfs_page_actor *); extern int squashfs_max_decompressors(void); /* export.c */ extern __le64 *squashfs_read_inode_lookup_table(struct super_block *, u64, u64, unsigned int); /* fragment.c */ extern int squashfs_frag_lookup(struct super_block *, unsigned int, u64 *); extern __le64 *squashfs_read_fragment_index_table(struct super_block *, u64, u64, unsigned int); /* file.c */ void squashfs_copy_cache(struct page *, struct squashfs_cache_entry *, int, int); /* file_xxx.c */ extern int squashfs_readpage_block(struct page *, u64, int); /* id.c */ extern int squashfs_get_id(struct super_block *, unsigned int, unsigned int *); extern __le64 *squashfs_read_id_index_table(struct super_block *, u64, u64, unsigned short); /* inode.c */ extern struct inode *squashfs_iget(struct super_block *, long long, unsigned int); extern int squashfs_read_inode(struct inode *, long long); /* xattr.c */ extern ssize_t squashfs_listxattr(struct dentry *, char *, size_t); /* * Inodes, files, decompressor and xattr operations */ /* dir.c */ extern const struct file_operations squashfs_dir_ops; /* export.c */ extern const struct export_operations squashfs_export_ops; /* file.c */ extern const struct address_space_operations squashfs_aops; /* inode.c */ extern const struct inode_operations squashfs_inode_ops; /* namei.c */ extern const struct inode_operations squashfs_dir_inode_ops; /* symlink.c */ extern const struct address_space_operations squashfs_symlink_aops; extern const struct inode_operations squashfs_symlink_inode_ops; /* xattr.c */ extern const struct xattr_handler *squashfs_xattr_handlers[]; e='6'>6space:mode:
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 /tools/perf/builtin-sched.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 'tools/perf/builtin-sched.c')