diff options
Diffstat (limited to 'arch/x86/platform/efi/efi.c')
-rw-r--r-- | arch/x86/platform/efi/efi.c | 77 |
1 files changed, 32 insertions, 45 deletions
diff --git a/arch/x86/platform/efi/efi.c b/arch/x86/platform/efi/efi.c index aded2a9..0a34d9e 100644 --- a/arch/x86/platform/efi/efi.c +++ b/arch/x86/platform/efi/efi.c @@ -70,11 +70,15 @@ EXPORT_SYMBOL(efi); struct efi_memory_map memmap; bool efi_64bit; -static bool efi_native; static struct efi efi_phys __initdata; static efi_system_table_t efi_systab __initdata; +static inline bool efi_is_native(void) +{ + return IS_ENABLED(CONFIG_X86_64) == efi_64bit; +} + static int __init setup_noefi(char *arg) { efi_enabled = 0; @@ -235,22 +239,7 @@ static efi_status_t __init phys_efi_set_virtual_address_map( return status; } -static efi_status_t __init phys_efi_get_time(efi_time_t *tm, - efi_time_cap_t *tc) -{ - unsigned long flags; - efi_status_t status; - - spin_lock_irqsave(&rtc_lock, flags); - efi_call_phys_prelog(); - status = efi_call_phys2(efi_phys.get_time, virt_to_phys(tm), - virt_to_phys(tc)); - efi_call_phys_epilog(); - spin_unlock_irqrestore(&rtc_lock, flags); - return status; -} - -int efi_set_rtc_mmss(unsigned long nowtime) +static int efi_set_rtc_mmss(unsigned long nowtime) { int real_seconds, real_minutes; efi_status_t status; @@ -279,7 +268,7 @@ int efi_set_rtc_mmss(unsigned long nowtime) return 0; } -unsigned long efi_get_time(void) +static unsigned long efi_get_time(void) { efi_status_t status; efi_time_t eft; @@ -420,7 +409,7 @@ void __init efi_reserve_boot_services(void) } } -static void __init efi_unmap_memmap(void) +void __init efi_unmap_memmap(void) { if (memmap.map) { early_iounmap(memmap.map, memmap.nr_map * memmap.desc_size); @@ -432,7 +421,7 @@ void __init efi_free_boot_services(void) { void *p; - if (!efi_native) + if (!efi_is_native()) return; for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) { @@ -635,18 +624,13 @@ static int __init efi_runtime_init(void) } /* * We will only need *early* access to the following - * two EFI runtime services before set_virtual_address_map + * EFI runtime service before set_virtual_address_map * is invoked. */ - efi_phys.get_time = (efi_get_time_t *)runtime->get_time; efi_phys.set_virtual_address_map = (efi_set_virtual_address_map_t *) runtime->set_virtual_address_map; - /* - * Make efi_get_time can be called before entering - * virtual mode. - */ - efi.get_time = phys_efi_get_time; + early_iounmap(runtime, sizeof(efi_runtime_services_t)); return 0; @@ -684,12 +668,10 @@ void __init efi_init(void) return; } efi_phys.systab = (efi_system_table_t *)boot_params.efi_info.efi_systab; - efi_native = !efi_64bit; #else efi_phys.systab = (efi_system_table_t *) (boot_params.efi_info.efi_systab | ((__u64)boot_params.efi_info.efi_systab_hi<<32)); - efi_native = efi_64bit; #endif if (efi_systab_init(efi_phys.systab)) { @@ -723,7 +705,7 @@ void __init efi_init(void) * that doesn't match the kernel 32/64-bit mode. */ - if (!efi_native) + if (!efi_is_native()) pr_info("No EFI runtime due to 32/64-bit mismatch with kernel\n"); else if (efi_runtime_init()) { efi_enabled = 0; @@ -734,12 +716,10 @@ void __init efi_init(void) efi_enabled = 0; return; } -#ifdef CONFIG_X86_32 - if (efi_native) { + if (efi_is_native()) { x86_platform.get_wallclock = efi_get_time; x86_platform.set_wallclock = efi_set_rtc_mmss; } -#endif #if EFI_DEBUG print_efi_memmap(); @@ -810,6 +790,16 @@ void __iomem *efi_lookup_mapped_addr(u64 phys_addr) return NULL; } +void 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); +} + /* * This function will switch the EFI runtime services to virtual mode. * Essentially, look through the EFI memmap and map every region that @@ -823,7 +813,7 @@ void __init efi_enter_virtual_mode(void) efi_memory_desc_t *md, *prev_md = NULL; efi_status_t status; unsigned long size; - u64 end, systab, addr, npages, end_pfn; + u64 end, systab, end_pfn; void *p, *va, *new_memmap = NULL; int count = 0; @@ -834,7 +824,7 @@ void __init efi_enter_virtual_mode(void) * non-native EFI */ - if (!efi_native) { + if (!efi_is_native()) { efi_unmap_memmap(); return; } @@ -879,10 +869,14 @@ void __init efi_enter_virtual_mode(void) end_pfn = PFN_UP(end); if (end_pfn <= max_low_pfn_mapped || (end_pfn > (1UL << (32 - PAGE_SHIFT)) - && end_pfn <= max_pfn_mapped)) + && end_pfn <= max_pfn_mapped)) { va = __va(md->phys_addr); - else - va = efi_ioremap(md->phys_addr, size, md->type); + + 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; @@ -892,13 +886,6 @@ void __init efi_enter_virtual_mode(void) continue; } - if (!(md->attribute & EFI_MEMORY_WB)) { - addr = md->virt_addr; - npages = md->num_pages; - memrange_efi_to_native(&addr, &npages); - set_memory_uc(addr, npages); - } - systab = (u64) (unsigned long) efi_phys.systab; if (md->phys_addr <= systab && systab < end) { systab += md->virt_addr - md->phys_addr; |