diff options
Diffstat (limited to 'arch/x86/platform/efi/efi.c')
| -rw-r--r-- | arch/x86/platform/efi/efi.c | 212 |
1 files changed, 72 insertions, 140 deletions
diff --git a/arch/x86/platform/efi/efi.c b/arch/x86/platform/efi/efi.c index e966115d105c..463b784499a8 100644 --- a/arch/x86/platform/efi/efi.c +++ b/arch/x86/platform/efi/efi.c @@ -49,21 +49,16 @@ #include <asm/efi.h> #include <asm/e820/api.h> #include <asm/time.h> -#include <asm/set_memory.h> #include <asm/tlbflush.h> #include <asm/x86_init.h> #include <asm/uv/uv.h> static unsigned long efi_systab_phys __initdata; -static unsigned long prop_phys = EFI_INVALID_TABLE_ADDR; -static unsigned long uga_phys = EFI_INVALID_TABLE_ADDR; static unsigned long efi_runtime, efi_nr_tables; unsigned long efi_fw_vendor, efi_config_table; static const efi_config_table_type_t arch_tables[] __initconst = { - {EFI_PROPERTIES_TABLE_GUID, &prop_phys, "PROP" }, - {UGA_IO_PROTOCOL_GUID, &uga_phys, "UGA" }, #ifdef CONFIG_X86_UV {UV_SYSTEM_TABLE_GUID, &uv_systab_phys, "UVsystab" }, #endif @@ -75,7 +70,6 @@ static const unsigned long * const efi_tables[] = { &efi.acpi20, &efi.smbios, &efi.smbios3, - &uga_phys, #ifdef CONFIG_X86_UV &uv_systab_phys, #endif @@ -83,7 +77,6 @@ static const unsigned long * const efi_tables[] = { &efi_runtime, &efi_config_table, &efi.esrt, - &prop_phys, &efi_mem_attr_table, #ifdef CONFIG_EFI_RCI2_TABLE &rci2_table_phys, @@ -91,6 +84,15 @@ static const unsigned long * const efi_tables[] = { &efi.tpm_log, &efi.tpm_final_log, &efi_rng_seed, +#ifdef CONFIG_LOAD_UEFI_KEYS + &efi.mokvar_table, +#endif +#ifdef CONFIG_EFI_COCO_SECRET + &efi.coco_secret, +#endif +#ifdef CONFIG_UNACCEPTED_MEMORY + &efi.unaccepted, +#endif }; u64 efi_setup; /* efi setup_data physical address */ @@ -103,29 +105,6 @@ static int __init setup_add_efi_memmap(char *arg) } early_param("add_efi_memmap", setup_add_efi_memmap); -void __init efi_find_mirror(void) -{ - efi_memory_desc_t *md; - u64 mirror_size = 0, total_size = 0; - - if (!efi_enabled(EFI_MEMMAP)) - return; - - for_each_efi_memory_desc(md) { - unsigned long long start = md->phys_addr; - unsigned long long size = md->num_pages << EFI_PAGE_SHIFT; - - total_size += size; - if (md->attribute & EFI_MEMORY_MORE_RELIABLE) { - memblock_mark_mirror(start, size); - mirror_size += size; - } - } - if (mirror_size) - pr_info("Memory: %lldM/%lldM mirrored memory\n", - mirror_size>>20, total_size>>20); -} - /* * Tell the kernel about the EFI memory map. This might include * more than the max 128 entries that can fit in the passed in e820 @@ -187,7 +166,7 @@ static void __init do_add_efi_memmap(void) } /* - * Given add_efi_memmap defaults to 0 and there there is no alternative + * Given add_efi_memmap defaults to 0 and there is no alternative * e820 mechanism for soft-reserved memory, import the full EFI memory * map if soft reservations are present and enabled. Otherwise, the * mechanism to disable the kernel's consideration of EFI_MEMORY_SP is @@ -232,15 +211,15 @@ int __init efi_memblock_x86_reserve_range(void) data.desc_size = e->efi_memdesc_size; data.desc_version = e->efi_memdesc_version; - rv = efi_memmap_init_early(&data); - if (rv) - return rv; + if (!efi_enabled(EFI_PARAVIRT)) { + rv = efi_memmap_init_early(&data); + if (rv) + return rv; + } if (add_efi_memmap || do_efi_soft_reserve()) do_add_efi_memmap(); - efi_fake_memmap_early(); - WARN(efi.memmap.desc_version != 1, "Unexpected EFI_MEMORY_DESCRIPTOR version %ld", efi.memmap.desc_version); @@ -321,6 +300,50 @@ static void __init efi_clean_memmap(void) } } +/* + * Firmware can use EfiMemoryMappedIO to request that MMIO regions be + * mapped by the OS so they can be accessed by EFI runtime services, but + * should have no other significance to the OS (UEFI r2.10, sec 7.2). + * However, most bootloaders and EFI stubs convert EfiMemoryMappedIO + * regions to E820_TYPE_RESERVED entries, which prevent Linux from + * allocating space from them (see remove_e820_regions()). + * + * Some platforms use EfiMemoryMappedIO entries for PCI MMCONFIG space and + * PCI host bridge windows, which means Linux can't allocate BAR space for + * hot-added devices. + * + * Remove large EfiMemoryMappedIO regions from the E820 map to avoid this + * problem. + * + * Retain small EfiMemoryMappedIO regions because on some platforms, these + * describe non-window space that's included in host bridge _CRS. If we + * assign that space to PCI devices, they don't work. + */ +static void __init efi_remove_e820_mmio(void) +{ + efi_memory_desc_t *md; + u64 size, start, end; + int i = 0; + + for_each_efi_memory_desc(md) { + if (md->type == EFI_MEMORY_MAPPED_IO) { + size = md->num_pages << EFI_PAGE_SHIFT; + start = md->phys_addr; + end = start + size - 1; + if (size >= 256*1024) { + pr_info("Remove mem%02u: MMIO range=[0x%08llx-0x%08llx] (%lluMB) from e820 map\n", + i, start, end, size >> 20); + e820__range_remove(start, size, + E820_TYPE_RESERVED, 1); + } else { + pr_info("Not removing mem%02u: MMIO range=[0x%08llx-0x%08llx] (%lluKB) from e820 map\n", + i, start, end, size >> 10); + } + } + i++; + } +} + void __init efi_print_memmap(void) { efi_memory_desc_t *md; @@ -352,7 +375,7 @@ static int __init efi_systab_init(unsigned long phys) return -ENOMEM; } - ret = efi_systab_check_header(hdr, 1); + ret = efi_systab_check_header(hdr); if (ret) { early_memunmap(p, size); return ret; @@ -466,104 +489,22 @@ void __init efi_init(void) */ if (!efi_runtime_supported()) - pr_info("No EFI runtime due to 32/64-bit mismatch with kernel\n"); + pr_err("No EFI runtime due to 32/64-bit mismatch with kernel\n"); if (!efi_runtime_supported() || efi_runtime_disabled()) { efi_memmap_unmap(); return; } - /* Parse the EFI Properties table if it exists */ - if (prop_phys != EFI_INVALID_TABLE_ADDR) { - efi_properties_table_t *tbl; - - tbl = early_memremap_ro(prop_phys, sizeof(*tbl)); - if (tbl == NULL) { - pr_err("Could not map Properties table!\n"); - } else { - if (tbl->memory_protection_attribute & - EFI_PROPERTIES_RUNTIME_MEMORY_PROTECTION_NON_EXECUTABLE_PE_DATA) - set_bit(EFI_NX_PE_DATA, &efi.flags); - - early_memunmap(tbl, sizeof(*tbl)); - } - } - set_bit(EFI_RUNTIME_SERVICES, &efi.flags); efi_clean_memmap(); + efi_remove_e820_mmio(); + if (efi_enabled(EFI_DBG)) efi_print_memmap(); } -#if defined(CONFIG_X86_32) || defined(CONFIG_X86_UV) - -void __init efi_set_executable(efi_memory_desc_t *md, bool executable) -{ - u64 addr, npages; - - addr = md->virt_addr; - npages = md->num_pages; - - memrange_efi_to_native(&addr, &npages); - - if (executable) - set_memory_x(addr, npages); - else - set_memory_nx(addr, npages); -} - -void __init runtime_code_page_mkexec(void) -{ - efi_memory_desc_t *md; - - /* Make EFI runtime service code area executable */ - for_each_efi_memory_desc(md) { - if (md->type != EFI_RUNTIME_SERVICES_CODE) - continue; - - efi_set_executable(md, true); - } -} - -void __init efi_memory_uc(u64 addr, unsigned long size) -{ - unsigned long page_shift = 1UL << EFI_PAGE_SHIFT; - u64 npages; - - npages = round_up(size, page_shift) / page_shift; - memrange_efi_to_native(&addr, &npages); - set_memory_uc(addr, npages); -} - -void __init old_map_region(efi_memory_desc_t *md) -{ - u64 start_pfn, end_pfn, end; - unsigned long size; - void *va; - - start_pfn = PFN_DOWN(md->phys_addr); - size = md->num_pages << PAGE_SHIFT; - end = md->phys_addr + size; - end_pfn = PFN_UP(end); - - if (pfn_range_is_mapped(start_pfn, end_pfn)) { - va = __va(md->phys_addr); - - if (!(md->attribute & EFI_MEMORY_WB)) - efi_memory_uc((u64)(unsigned long)va, size); - } else - va = efi_ioremap(md->phys_addr, size, - md->type, md->attribute); - - md->virt_addr = (u64) (unsigned long) va; - if (!va) - pr_err("ioremap of 0x%llX failed!\n", - (unsigned long long)md->phys_addr); -} - -#endif - /* Merge contiguous regions of the same type and attribute */ static void __init efi_merge_regions(void) { @@ -648,7 +589,7 @@ static inline void *efi_map_next_entry_reverse(void *entry) */ static void *efi_map_next_entry(void *entry) { - if (!efi_have_uv1_memmap() && efi_enabled(EFI_64BIT)) { + if (efi_enabled(EFI_64BIT)) { /* * Starting in UEFI v2.5 the EFI_PROPERTIES_TABLE * config table feature requires us to map all entries @@ -777,11 +718,9 @@ static void __init kexec_enter_virtual_mode(void) /* * We don't do virtual mode, since we don't do runtime services, on - * non-native EFI. With the UV1 memmap, we don't do runtime services in - * kexec kernel because in the initial boot something else might - * have been mapped at these virtual addresses. + * non-native EFI. */ - if (efi_is_mixed() || efi_have_uv1_memmap()) { + if (efi_is_mixed()) { efi_memmap_unmap(); clear_bit(EFI_RUNTIME_SERVICES, &efi.flags); return; @@ -823,6 +762,7 @@ static void __init kexec_enter_virtual_mode(void) efi_sync_low_kernel_mappings(); efi_native_runtime_setup(); + efi_runtime_update_mappings(); #endif } @@ -832,12 +772,6 @@ static void __init kexec_enter_virtual_mode(void) * has the runtime attribute bit set in its memory descriptor into the * efi_pgd page table. * - * The old method which used to update that memory descriptor with the - * virtual address obtained from ioremap() is still supported when the - * kernel is booted on SG1 UV1 hardware. Same old method enabled the - * runtime services to be called without having to thunk back into - * physical mode for every invocation. - * * The new method does a pagetable switch in a preemption-safe manner * so that we're in a different address space when calling a runtime * function. For function arguments passing we do copy the PUDs of the @@ -954,13 +888,6 @@ bool efi_is_table_address(unsigned long phys_addr) return false; } -char *efi_systab_show_arch(char *str) -{ - if (uga_phys != EFI_INVALID_TABLE_ADDR) - str += sprintf(str, "UGA=0x%lx\n", uga_phys); - return str; -} - #define EFI_FIELD(var) efi_ ## var #define EFI_ATTR_SHOW(name) \ @@ -993,3 +920,8 @@ umode_t efi_attr_is_visible(struct kobject *kobj, struct attribute *attr, int n) } return attr->mode; } + +enum efi_secureboot_mode __x86_ima_efi_boot_mode(void) +{ + return boot_params.secure_boot; +} |