@@ -6,10 +6,8 @@
#ifdef CONFIG_EFI
extern void efi_init(void);
-extern void efi_idmap_init(void);
#else
#define efi_init()
-#define efi_idmap_init()
#endif
#define efi_call_virt(f, ...) \
@@ -31,8 +31,6 @@ extern void paging_init(void);
extern void setup_mm_for_reboot(void);
extern void __iomem *early_io_map(phys_addr_t phys, unsigned long virt);
extern void init_mem_pgprot(void);
-/* create an identity mapping for memory (or io if map_io is true) */
-extern void create_id_mapping(phys_addr_t addr, phys_addr_t size, int map_io);
extern void create_pgd_mapping(struct mm_struct *mm, phys_addr_t phys,
unsigned long virt, phys_addr_t size,
pgprot_t prot);
@@ -47,27 +47,6 @@ static int __init is_normal_ram(efi_memory_desc_t *md)
return 0;
}
-static void __init efi_setup_idmap(void)
-{
- struct memblock_region *r;
- efi_memory_desc_t *md;
- u64 paddr, npages, size;
-
- for_each_memblock(memory, r)
- create_id_mapping(r->base, r->size, 0);
-
- /* map runtime io spaces */
- for_each_efi_memory_desc(&memmap, md) {
- if (!(md->attribute & EFI_MEMORY_RUNTIME) || is_normal_ram(md))
- continue;
- paddr = md->phys_addr;
- npages = md->num_pages;
- memrange_efi_to_native(&paddr, &npages);
- size = npages << PAGE_SHIFT;
- create_id_mapping(paddr, size, 1);
- }
-}
-
static int __init uefi_init(void)
{
efi_char16_t *c16;
@@ -207,15 +186,6 @@ void __init efi_init(void)
reserve_regions();
}
-void __init efi_idmap_init(void)
-{
- if (!efi_enabled(EFI_BOOT))
- return;
-
- /* boot time idmap_pg_dir is incomplete, so fill in missing parts */
- efi_setup_idmap();
-}
-
static int __init arm64_enter_virtual_mode(void)
{
u64 mapsize;
@@ -392,7 +392,6 @@ void __init setup_arch(char **cmdline_p)
paging_init();
request_standard_resources();
- efi_idmap_init();
efi_virtmap_init();
unflatten_device_tree();
@@ -283,18 +283,6 @@ static void __init create_mapping(phys_addr_t phys, unsigned long virt,
size, PAGE_KERNEL_EXEC);
}
-void __init create_id_mapping(phys_addr_t addr, phys_addr_t size, int map_io)
-{
- if ((addr >> PGDIR_SHIFT) >= ARRAY_SIZE(idmap_pg_dir)) {
- pr_warn("BUG: not creating id mapping for %pa\n", &addr);
- return;
- }
- __create_mapping(&init_mm, &idmap_pg_dir[pgd_index(addr)],
- addr, addr, size,
- map_io ? __pgprot(PROT_DEVICE_nGnRE)
- : PAGE_KERNEL_EXEC);
-}
-
void __init create_pgd_mapping(struct mm_struct *mm, phys_addr_t phys,
unsigned long virt, phys_addr_t size,
pgprot_t prot)
Now that we have moved the call to SetVirtualAddressMap() to the stub, UEFI has no use for the ID map, so we can drop the code that installs ID mappings for UEFI memory regions. Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> --- arch/arm64/include/asm/efi.h | 2 -- arch/arm64/include/asm/mmu.h | 2 -- arch/arm64/kernel/efi.c | 30 ------------------------------ arch/arm64/kernel/setup.c | 1 - arch/arm64/mm/mmu.c | 12 ------------ 5 files changed, 47 deletions(-)