24b5e20f11
Pull EFI updates from Ingo Molnar:
"The main changes are:
- Use separate EFI page tables when executing EFI firmware code.
This isolates the EFI context from the rest of the kernel, which
has security and general robustness advantages. (Matt Fleming)
- Run regular UEFI firmware with interrupts enabled. This is already
the status quo under other OSs. (Ard Biesheuvel)
- Various x86 EFI enhancements, such as the use of non-executable
attributes for EFI memory mappings. (Sai Praneeth Prakhya)
- Various arm64 UEFI enhancements. (Ard Biesheuvel)
- ... various fixes and cleanups.
The separate EFI page tables feature got delayed twice already,
because it's an intrusive change and we didn't feel confident about
it - third time's the charm we hope!"
* 'efi-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (37 commits)
x86/mm/pat: Fix boot crash when 1GB pages are not supported by the CPU
x86/efi: Only map kernel text for EFI mixed mode
x86/efi: Map EFI_MEMORY_{XP,RO} memory region bits to EFI page tables
x86/mm/pat: Don't implicitly allow _PAGE_RW in kernel_map_pages_in_pgd()
efi/arm*: Perform hardware compatibility check
efi/arm64: Check for h/w support before booting a >4 KB granular kernel
efi/arm: Check for LPAE support before booting a LPAE kernel
efi/arm-init: Use read-only early mappings
efi/efistub: Prevent __init annotations from being used
arm64/vmlinux.lds.S: Handle .init.rodata.xxx and .init.bss sections
efi/arm64: Drop __init annotation from handle_kernel_image()
x86/mm/pat: Use _PAGE_GLOBAL bit for EFI page table mappings
efi/runtime-wrappers: Run UEFI Runtime Services with interrupts enabled
efi: Reformat GUID tables to follow the format in UEFI spec
efi: Add Persistent Memory type name
efi: Add NV memory attribute
x86/efi: Show actual ending addresses in efi_print_memmap
x86/efi/bgrt: Don't ignore the BGRT if the 'valid' bit is 0
efivars: Use to_efivar_entry
efi: Runtime-wrapper: Get rid of the rtc_lock spinlock
...
65 lines
2.2 KiB
C
65 lines
2.2 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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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 update_fdt(efi_system_table_t *sys_table, void *orig_fdt,
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unsigned long orig_fdt_size,
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void *fdt, int new_fdt_size, char *cmdline_ptr,
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u64 initrd_addr, u64 initrd_size,
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efi_memory_desc_t *memory_map,
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unsigned long map_size, unsigned long desc_size,
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u32 desc_ver);
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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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#endif
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