diff options
Diffstat (limited to 'arch/arm64/include/asm/efi.h')
| -rw-r--r-- | arch/arm64/include/asm/efi.h | 106 |
1 files changed, 50 insertions, 56 deletions
diff --git a/arch/arm64/include/asm/efi.h b/arch/arm64/include/asm/efi.h index b54d3a86c444..bcd5622aa096 100644 --- a/arch/arm64/include/asm/efi.h +++ b/arch/arm64/include/asm/efi.h @@ -14,34 +14,40 @@ #ifdef CONFIG_EFI extern void efi_init(void); + +bool efi_runtime_fixup_exception(struct pt_regs *regs, const char *msg); #else #define efi_init() + +static inline +bool efi_runtime_fixup_exception(struct pt_regs *regs, const char *msg) +{ + return false; +} #endif int efi_create_mapping(struct mm_struct *mm, efi_memory_desc_t *md); -int efi_set_mapping_permissions(struct mm_struct *mm, efi_memory_desc_t *md); - -#define arch_efi_call_virt_setup() \ -({ \ - efi_virtmap_load(); \ - __efi_fpsimd_begin(); \ -}) +int efi_set_mapping_permissions(struct mm_struct *mm, efi_memory_desc_t *md, + bool has_bti); +#undef arch_efi_call_virt #define arch_efi_call_virt(p, f, args...) \ -({ \ - efi_##f##_t *__f; \ - __f = p->f; \ - __efi_rt_asm_wrapper(__f, #f, args); \ -}) - -#define arch_efi_call_virt_teardown() \ -({ \ - __efi_fpsimd_end(); \ - efi_virtmap_unload(); \ -}) + __efi_rt_asm_wrapper((p)->f, #f, args) +extern u64 *efi_rt_stack_top; efi_status_t __efi_rt_asm_wrapper(void *, const char *, ...); +void arch_efi_call_virt_setup(void); +void arch_efi_call_virt_teardown(void); + +/* + * efi_rt_stack_top[-1] contains the value the stack pointer had before + * switching to the EFI runtime stack. + */ +#define current_in_efi() \ + (!preemptible() && efi_rt_stack_top != NULL && \ + on_task_stack(current, READ_ONCE(efi_rt_stack_top[-1]), 1)) + #define ARCH_EFI_IRQ_FLAGS_MASK (PSR_D_BIT | PSR_A_BIT | PSR_I_BIT | PSR_F_BIT) /* @@ -58,67 +64,46 @@ efi_status_t __efi_rt_asm_wrapper(void *, const char *, ...); /* arch specific definitions used by the stub code */ /* - * AArch64 requires the DTB to be 8-byte aligned in the first 512MiB from - * start of kernel and may not cross a 2MiB boundary. We set alignment to - * 2MiB so we know it won't cross a 2MiB boundary. - */ -#define EFI_FDT_ALIGN SZ_2M /* used by allocate_new_fdt_and_exit_boot() */ - -/* * In some configurations (e.g. VMAP_STACK && 64K pages), stacks built into the * kernel need greater alignment than we require the segments to be padded to. */ #define EFI_KIMG_ALIGN \ (SEGMENT_ALIGN > THREAD_ALIGN ? SEGMENT_ALIGN : THREAD_ALIGN) -/* on arm64, the FDT may be located anywhere in system RAM */ -static inline unsigned long efi_get_max_fdt_addr(unsigned long dram_base) -{ - return ULONG_MAX; -} - /* * On arm64, we have to ensure that the initrd ends up in the linear region, * which is a 1 GB aligned region of size '1UL << (VA_BITS_MIN - 1)' that is * guaranteed to cover the kernel Image. * * Since the EFI stub is part of the kernel Image, we can relax the - * usual requirements in Documentation/arm64/booting.rst, which still + * usual requirements in Documentation/arch/arm64/booting.rst, which still * apply to other bootloaders, and are required for some kernel * configurations. */ -static inline unsigned long efi_get_max_initrd_addr(unsigned long dram_base, - unsigned long image_addr) +static inline unsigned long efi_get_max_initrd_addr(unsigned long image_addr) { return (image_addr & ~(SZ_1G - 1UL)) + (1UL << (VA_BITS_MIN - 1)); } -#define efi_call_early(f, ...) sys_table_arg->boottime->f(__VA_ARGS__) -#define __efi_call_early(f, ...) f(__VA_ARGS__) -#define efi_call_runtime(f, ...) sys_table_arg->runtime->f(__VA_ARGS__) -#define efi_is_64bit() (true) - -#define efi_table_attr(table, attr, instance) \ - ((table##_t *)instance)->attr - -#define efi_call_proto(protocol, f, instance, ...) \ - ((protocol##_t *)instance)->f(instance, ##__VA_ARGS__) - -#define alloc_screen_info(x...) &screen_info - -static inline void free_screen_info(efi_system_table_t *sys_table_arg, - struct screen_info *si) -{ -} - -/* redeclare as 'hidden' so the compiler will generate relative references */ -extern struct screen_info screen_info __attribute__((__visibility__("hidden"))); - -static inline void efifb_setup_from_dmi(struct screen_info *si, const char *opt) +static inline unsigned long efi_get_kimg_min_align(void) { + extern bool efi_nokaslr; + + /* + * Although relocatable kernels can fix up the misalignment with + * respect to MIN_KIMG_ALIGN, the resulting virtual text addresses are + * subtly out of sync with those recorded in the vmlinux when kaslr is + * disabled but the image required relocation anyway. Therefore retain + * 2M alignment if KASLR was explicitly disabled, even if it was not + * going to be activated to begin with. + */ + return efi_nokaslr ? MIN_KIMG_ALIGN : EFI_KIMG_ALIGN; } #define EFI_ALLOC_ALIGN SZ_64K +#define EFI_ALLOC_LIMIT ((1UL << 48) - 1) + +extern unsigned long primary_entry_offset(void); /* * On ARM systems, virtually remapped UEFI runtime services are set up in two @@ -164,4 +149,13 @@ static inline void efi_set_pgd(struct mm_struct *mm) void efi_virtmap_load(void); void efi_virtmap_unload(void); +static inline void efi_capsule_flush_cache_range(void *addr, int size) +{ + dcache_clean_inval_poc((unsigned long)addr, (unsigned long)addr + size); +} + +efi_status_t efi_handle_corrupted_x18(efi_status_t s, const char *f); + +void efi_icache_sync(unsigned long start, unsigned long end); + #endif /* _ASM_EFI_H */ |