abfb7b686a
As reported by James Morse, the current libstub code involving the annotated memory map only works somewhat correctly by accident, due to the fact that a pool allocation happens to be reused immediately, retaining its former contents on most implementations of the UEFI boot services. Instead of juggling memory maps, which makes the code more complex than it needs to be, simply put placeholder values into the FDT for the memory map parameters, and only write the actual values after ExitBootServices() has been called. Reported-by: James Morse <james.morse@arm.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Cc: <stable@vger.kernel.org> Cc: Jeffrey Hugo <jhugo@codeaurora.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Matt Fleming <matt@codeblueprint.co.uk> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-arm-kernel@lists.infradead.org Cc: linux-efi@vger.kernel.org Fixes: ed9cc156c42f ("efi/libstub: Use efi_exit_boot_services() in FDT") Link: http://lkml.kernel.org/r/1482587963-20183-2-git-send-email-ard.biesheuvel@linaro.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
69 lines
2.3 KiB
C
69 lines
2.3 KiB
C
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#ifndef _DRIVERS_FIRMWARE_EFI_EFISTUB_H
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#define _DRIVERS_FIRMWARE_EFI_EFISTUB_H
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/* error code which can't be mistaken for valid address */
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#define EFI_ERROR (~0UL)
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/*
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* __init annotations should not be used in the EFI stub, since the code is
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* either included in the decompressor (x86, ARM) where they have no effect,
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* or the whole stub is __init annotated at the section level (arm64), by
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* renaming the sections, in which case the __init annotation will be
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* redundant, and will result in section names like .init.init.text, and our
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* linker script does not expect that.
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*/
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#undef __init
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/*
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* Allow the platform to override the allocation granularity: this allows
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* systems that have the capability to run with a larger page size to deal
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* with the allocations for initrd and fdt more efficiently.
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*/
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#ifndef EFI_ALLOC_ALIGN
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#define EFI_ALLOC_ALIGN EFI_PAGE_SIZE
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#endif
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void efi_char16_printk(efi_system_table_t *, efi_char16_t *);
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efi_status_t efi_open_volume(efi_system_table_t *sys_table_arg, void *__image,
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void **__fh);
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efi_status_t efi_file_size(efi_system_table_t *sys_table_arg, void *__fh,
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efi_char16_t *filename_16, void **handle,
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u64 *file_sz);
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efi_status_t efi_file_read(void *handle, unsigned long *size, void *addr);
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efi_status_t efi_file_close(void *handle);
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unsigned long get_dram_base(efi_system_table_t *sys_table_arg);
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efi_status_t allocate_new_fdt_and_exit_boot(efi_system_table_t *sys_table,
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void *handle,
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unsigned long *new_fdt_addr,
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unsigned long max_addr,
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u64 initrd_addr, u64 initrd_size,
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char *cmdline_ptr,
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unsigned long fdt_addr,
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unsigned long fdt_size);
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void *get_fdt(efi_system_table_t *sys_table, unsigned long *fdt_size);
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void efi_get_virtmap(efi_memory_desc_t *memory_map, unsigned long map_size,
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unsigned long desc_size, efi_memory_desc_t *runtime_map,
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int *count);
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efi_status_t efi_get_random_bytes(efi_system_table_t *sys_table,
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unsigned long size, u8 *out);
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efi_status_t efi_random_alloc(efi_system_table_t *sys_table_arg,
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unsigned long size, unsigned long align,
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unsigned long *addr, unsigned long random_seed);
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efi_status_t check_platform_features(efi_system_table_t *sys_table_arg);
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efi_status_t efi_random_get_seed(efi_system_table_t *sys_table_arg);
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#endif
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