| Message ID | 1419245944-2424-9-git-send-email-ard.biesheuvel@linaro.org |
|---|---|
| State | New |
| Headers | show |
On Mon, Dec 22, 2014 at 10:59:04AM +0000, Ard Biesheuvel wrote: > 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(-) > > diff --git a/arch/arm64/include/asm/efi.h b/arch/arm64/include/asm/efi.h > index 6cc668a378c5..84c50853b5dc 100644 > --- a/arch/arm64/include/asm/efi.h > +++ b/arch/arm64/include/asm/efi.h > @@ -6,11 +6,9 @@ > > #ifdef CONFIG_EFI > extern void efi_init(void); > -extern void efi_idmap_init(void); > extern void efi_virtmap_init(void); > #else > #define efi_init() > -#define efi_idmap_init() > #define efi_virtmap_init > #endif > > diff --git a/arch/arm64/include/asm/mmu.h b/arch/arm64/include/asm/mmu.h > index 5fd40c43be80..3d311761e3c2 100644 > --- a/arch/arm64/include/asm/mmu.h > +++ b/arch/arm64/include/asm/mmu.h > @@ -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); > diff --git a/arch/arm64/kernel/efi.c b/arch/arm64/kernel/efi.c > index e969c5076713..d7d2e818c856 100644 > --- a/arch/arm64/kernel/efi.c > +++ b/arch/arm64/kernel/efi.c > @@ -53,27 +53,6 @@ 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); > - } > -} > - > /* > * Translate a EFI virtual address into a physical address: this is necessary, > * as some data members of the EFI system table are virtually remapped after > @@ -235,15 +214,6 @@ 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; > diff --git a/arch/arm64/kernel/setup.c b/arch/arm64/kernel/setup.c > index d8390f507da0..0771de962f37 100644 > --- a/arch/arm64/kernel/setup.c > +++ b/arch/arm64/kernel/setup.c > @@ -401,7 +401,6 @@ void __init setup_arch(char **cmdline_p) > paging_init(); > request_standard_resources(); > > - efi_idmap_init(); > efi_virtmap_init(); > > unflatten_device_tree(); > diff --git a/arch/arm64/mm/mmu.c b/arch/arm64/mm/mmu.c > index 3f3d5aa4a8b1..328638548871 100644 > --- a/arch/arm64/mm/mmu.c > +++ b/arch/arm64/mm/mmu.c > @@ -271,18 +271,6 @@ 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) > -- > 1.8.3.2 So, this one will clearly need to be reworked if it is to fit on top of the patches I sent out today. However, this is trivial rework, so: Acked-by: Leif Lindholm <leif.lindholm@linaro.org>
diff --git a/arch/arm64/include/asm/efi.h b/arch/arm64/include/asm/efi.h index 6cc668a378c5..84c50853b5dc 100644 --- a/arch/arm64/include/asm/efi.h +++ b/arch/arm64/include/asm/efi.h @@ -6,11 +6,9 @@ #ifdef CONFIG_EFI extern void efi_init(void); -extern void efi_idmap_init(void); extern void efi_virtmap_init(void); #else #define efi_init() -#define efi_idmap_init() #define efi_virtmap_init #endif diff --git a/arch/arm64/include/asm/mmu.h b/arch/arm64/include/asm/mmu.h index 5fd40c43be80..3d311761e3c2 100644 --- a/arch/arm64/include/asm/mmu.h +++ b/arch/arm64/include/asm/mmu.h @@ -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); diff --git a/arch/arm64/kernel/efi.c b/arch/arm64/kernel/efi.c index e969c5076713..d7d2e818c856 100644 --- a/arch/arm64/kernel/efi.c +++ b/arch/arm64/kernel/efi.c @@ -53,27 +53,6 @@ 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); - } -} - /* * Translate a EFI virtual address into a physical address: this is necessary, * as some data members of the EFI system table are virtually remapped after @@ -235,15 +214,6 @@ 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; diff --git a/arch/arm64/kernel/setup.c b/arch/arm64/kernel/setup.c index d8390f507da0..0771de962f37 100644 --- a/arch/arm64/kernel/setup.c +++ b/arch/arm64/kernel/setup.c @@ -401,7 +401,6 @@ void __init setup_arch(char **cmdline_p) paging_init(); request_standard_resources(); - efi_idmap_init(); efi_virtmap_init(); unflatten_device_tree(); diff --git a/arch/arm64/mm/mmu.c b/arch/arm64/mm/mmu.c index 3f3d5aa4a8b1..328638548871 100644 --- a/arch/arm64/mm/mmu.c +++ b/arch/arm64/mm/mmu.c @@ -271,18 +271,6 @@ 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(-)