diff options
Diffstat (limited to 'arch')
-rw-r--r-- | arch/x86/include/asm/efi.h | 2 | ||||
-rw-r--r-- | arch/x86/kernel/setup.c | 10 | ||||
-rw-r--r-- | arch/x86/platform/efi/efi.c | 377 |
3 files changed, 279 insertions, 110 deletions
diff --git a/arch/x86/include/asm/efi.h b/arch/x86/include/asm/efi.h index 844f735fd63a..c9dcc181d4d1 100644 --- a/arch/x86/include/asm/efi.h +++ b/arch/x86/include/asm/efi.h @@ -95,7 +95,7 @@ extern void __iomem *efi_ioremap(unsigned long addr, unsigned long size, extern int add_efi_memmap; extern void efi_set_executable(efi_memory_desc_t *md, bool executable); -extern void efi_memblock_x86_reserve_range(void); +extern int efi_memblock_x86_reserve_range(void); extern void efi_call_phys_prelog(void); extern void efi_call_phys_epilog(void); diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c index d7d5099fe874..88638883176a 100644 --- a/arch/x86/kernel/setup.c +++ b/arch/x86/kernel/setup.c @@ -749,10 +749,16 @@ void __init setup_arch(char **cmdline_p) #endif #ifdef CONFIG_EFI if (!strncmp((char *)&boot_params.efi_info.efi_loader_signature, - EFI_LOADER_SIGNATURE, 4)) { + "EL32", 4)) { efi_enabled = 1; - efi_memblock_x86_reserve_range(); + efi_64bit = false; + } else if (!strncmp((char *)&boot_params.efi_info.efi_loader_signature, + "EL64", 4)) { + efi_enabled = 1; + efi_64bit = true; } + if (efi_enabled && efi_memblock_x86_reserve_range()) + efi_enabled = 0; #endif x86_init.oem.arch_setup(); diff --git a/arch/x86/platform/efi/efi.c b/arch/x86/platform/efi/efi.c index 4cf9bd0a1653..92660edaa1e7 100644 --- a/arch/x86/platform/efi/efi.c +++ b/arch/x86/platform/efi/efi.c @@ -26,6 +26,8 @@ * Skip non-WB memory and ignore empty memory ranges. */ +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + #include <linux/kernel.h> #include <linux/init.h> #include <linux/efi.h> @@ -47,7 +49,6 @@ #include <asm/x86_init.h> #define EFI_DEBUG 1 -#define PFX "EFI: " int efi_enabled; EXPORT_SYMBOL(efi_enabled); @@ -67,6 +68,9 @@ 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; @@ -254,7 +258,7 @@ int efi_set_rtc_mmss(unsigned long nowtime) status = efi.get_time(&eft, &cap); if (status != EFI_SUCCESS) { - printk(KERN_ERR "Oops: efitime: can't read time!\n"); + pr_err("Oops: efitime: can't read time!\n"); return -1; } @@ -268,7 +272,7 @@ int efi_set_rtc_mmss(unsigned long nowtime) status = efi.set_time(&eft); if (status != EFI_SUCCESS) { - printk(KERN_ERR "Oops: efitime: can't write time!\n"); + pr_err("Oops: efitime: can't write time!\n"); return -1; } return 0; @@ -282,7 +286,7 @@ unsigned long efi_get_time(void) status = efi.get_time(&eft, &cap); if (status != EFI_SUCCESS) - printk(KERN_ERR "Oops: efitime: can't read time!\n"); + pr_err("Oops: efitime: can't read time!\n"); return mktime(eft.year, eft.month, eft.day, eft.hour, eft.minute, eft.second); @@ -338,11 +342,16 @@ static void __init do_add_efi_memmap(void) sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map); } -void __init efi_memblock_x86_reserve_range(void) +int __init efi_memblock_x86_reserve_range(void) { unsigned long pmap; #ifdef CONFIG_X86_32 + /* Can't handle data above 4GB at this time */ + if (boot_params.efi_info.efi_memmap_hi) { + pr_err("Memory map is above 4GB, disabling EFI.\n"); + return -EINVAL; + } pmap = boot_params.efi_info.efi_memmap; #else pmap = (boot_params.efi_info.efi_memmap | @@ -354,6 +363,8 @@ void __init efi_memblock_x86_reserve_range(void) memmap.desc_version = boot_params.efi_info.efi_memdesc_version; memmap.desc_size = boot_params.efi_info.efi_memdesc_size; memblock_reserve(pmap, memmap.nr_map * memmap.desc_size); + + return 0; } #if EFI_DEBUG @@ -367,7 +378,7 @@ static void __init print_efi_memmap(void) p < memmap.map_end; p += memmap.desc_size, i++) { md = p; - printk(KERN_INFO PFX "mem%02u: type=%u, attr=0x%llx, " + pr_info("mem%02u: type=%u, attr=0x%llx, " "range=[0x%016llx-0x%016llx) (%lluMB)\n", i, md->type, md->attribute, md->phys_addr, md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT), @@ -400,7 +411,7 @@ void __init efi_reserve_boot_services(void) memblock_is_region_reserved(start, size)) { /* Could not reserve, skip it */ md->num_pages = 0; - memblock_dbg(PFX "Could not reserve boot range " + memblock_dbg("Could not reserve boot range " "[0x%010llx-0x%010llx]\n", start, start+size-1); } else @@ -429,103 +440,172 @@ static void __init efi_free_boot_services(void) } } -void __init efi_init(void) +static int __init efi_systab_init(void *phys) { - efi_config_table_t *config_tables; - efi_runtime_services_t *runtime; - efi_char16_t *c16; - char vendor[100] = "unknown"; - int i = 0; - void *tmp; + if (efi_64bit) { + efi_system_table_64_t *systab64; + u64 tmp = 0; + + systab64 = early_ioremap((unsigned long)phys, + sizeof(*systab64)); + if (systab64 == NULL) { + pr_err("Couldn't map the system table!\n"); + return -ENOMEM; + } + efi_systab.hdr = systab64->hdr; + efi_systab.fw_vendor = systab64->fw_vendor; + tmp |= systab64->fw_vendor; + efi_systab.fw_revision = systab64->fw_revision; + efi_systab.con_in_handle = systab64->con_in_handle; + tmp |= systab64->con_in_handle; + efi_systab.con_in = systab64->con_in; + tmp |= systab64->con_in; + efi_systab.con_out_handle = systab64->con_out_handle; + tmp |= systab64->con_out_handle; + efi_systab.con_out = systab64->con_out; + tmp |= systab64->con_out; + efi_systab.stderr_handle = systab64->stderr_handle; + tmp |= systab64->stderr_handle; + efi_systab.stderr = systab64->stderr; + tmp |= systab64->stderr; + efi_systab.runtime = (void *)(unsigned long)systab64->runtime; + tmp |= systab64->runtime; + efi_systab.boottime = (void *)(unsigned long)systab64->boottime; + tmp |= systab64->boottime; + efi_systab.nr_tables = systab64->nr_tables; + efi_systab.tables = systab64->tables; + tmp |= systab64->tables; + + early_iounmap(systab64, sizeof(*systab64)); #ifdef CONFIG_X86_32 - efi_phys.systab = (efi_system_table_t *)boot_params.efi_info.efi_systab; -#else - efi_phys.systab = (efi_system_table_t *) - (boot_params.efi_info.efi_systab | - ((__u64)boot_params.efi_info.efi_systab_hi<<32)); + if (tmp >> 32) { + pr_err("EFI data located above 4GB, disabling EFI.\n"); + return -EINVAL; + } #endif + } else { + efi_system_table_32_t *systab32; + + systab32 = early_ioremap((unsigned long)phys, + sizeof(*systab32)); + if (systab32 == NULL) { + pr_err("Couldn't map the system table!\n"); + return -ENOMEM; + } + + efi_systab.hdr = systab32->hdr; + efi_systab.fw_vendor = systab32->fw_vendor; + efi_systab.fw_revision = systab32->fw_revision; + efi_systab.con_in_handle = systab32->con_in_handle; + efi_systab.con_in = systab32->con_in; + efi_systab.con_out_handle = systab32->con_out_handle; + efi_systab.con_out = systab32->con_out; + efi_systab.stderr_handle = systab32->stderr_handle; + efi_systab.stderr = systab32->stderr; + efi_systab.runtime = (void *)(unsigned long)systab32->runtime; + efi_systab.boottime = (void *)(unsigned long)systab32->boottime; + efi_systab.nr_tables = systab32->nr_tables; + efi_systab.tables = systab32->tables; + + early_iounmap(systab32, sizeof(*systab32)); + } - efi.systab = early_ioremap((unsigned long)efi_phys.systab, - sizeof(efi_system_table_t)); - if (efi.systab == NULL) - printk(KERN_ERR "Couldn't map the EFI system table!\n"); - memcpy(&efi_systab, efi.systab, sizeof(efi_system_table_t)); - early_iounmap(efi.systab, sizeof(efi_system_table_t)); efi.systab = &efi_systab; /* * Verify the EFI Table */ - if (efi.systab->hdr.signature != EFI_SYSTEM_TABLE_SIGNATURE) - printk(KERN_ERR "EFI system table signature incorrect!\n"); + if (efi.systab->hdr.signature != EFI_SYSTEM_TABLE_SIGNATURE) { + pr_err("System table signature incorrect!\n"); + return -EINVAL; + } if ((efi.systab->hdr.revision >> 16) == 0) - printk(KERN_ERR "Warning: EFI system table version " + pr_err("Warning: System table version " "%d.%02d, expected 1.00 or greater!\n", efi.systab->hdr.revision >> 16, efi.systab->hdr.revision & 0xffff); - /* - * Show what we know for posterity - */ - c16 = tmp = early_ioremap(efi.systab->fw_vendor, 2); - if (c16) { - for (i = 0; i < sizeof(vendor) - 1 && *c16; ++i) - vendor[i] = *c16++; - vendor[i] = '\0'; - } else - printk(KERN_ERR PFX "Could not map the firmware vendor!\n"); - early_iounmap(tmp, 2); + return 0; +} - printk(KERN_INFO "EFI v%u.%.02u by %s\n", - efi.systab->hdr.revision >> 16, - efi.systab->hdr.revision & 0xffff, vendor); +static int __init efi_config_init(u64 tables, int nr_tables) +{ + void *config_tables, *tablep; + int i, sz; + + if (efi_64bit) + sz = sizeof(efi_config_table_64_t); + else + sz = sizeof(efi_config_table_32_t); /* * Let's see what config tables the firmware passed to us. */ - config_tables = early_ioremap( - efi.systab->tables, - efi.systab->nr_tables * sizeof(efi_config_table_t)); - if (config_tables == NULL) - printk(KERN_ERR "Could not map EFI Configuration Table!\n"); + config_tables = early_ioremap(tables, nr_tables * sz); + if (config_tables == NULL) { + pr_err("Could not map Configuration table!\n"); + return -ENOMEM; + } - printk(KERN_INFO); + tablep = config_tables; + pr_info(""); for (i = 0; i < efi.systab->nr_tables; i++) { - if (!efi_guidcmp(config_tables[i].guid, MPS_TABLE_GUID)) { - efi.mps = config_tables[i].table; - printk(" MPS=0x%lx ", config_tables[i].table); - } else if (!efi_guidcmp(config_tables[i].guid, - ACPI_20_TABLE_GUID)) { - efi.acpi20 = config_tables[i].table; - printk(" ACPI 2.0=0x%lx ", config_tables[i].table); - } else if (!efi_guidcmp(config_tables[i].guid, - ACPI_TABLE_GUID)) { - efi.acpi = config_tables[i].table; - printk(" ACPI=0x%lx ", config_tables[i].table); - } else if (!efi_guidcmp(config_tables[i].guid, - SMBIOS_TABLE_GUID)) { - efi.smbios = config_tables[i].table; - printk(" SMBIOS=0x%lx ", config_tables[i].table); + efi_guid_t guid; + unsigned long table; + + if (efi_64bit) { + u64 table64; + guid = ((efi_config_table_64_t *)tablep)->guid; + table64 = ((efi_config_table_64_t *)tablep)->table; + table = table64; +#ifdef CONFIG_X86_32 + if (table64 >> 32) { + pr_cont("\n"); + pr_err("Table located above 4GB, disabling EFI.\n"); + early_iounmap(config_tables, + efi.systab->nr_tables * sz); + return -EINVAL; + } +#endif + } else { + guid = ((efi_config_table_32_t *)tablep)->guid; + table = ((efi_config_table_32_t *)tablep)->table; + } + if (!efi_guidcmp(guid, MPS_TABLE_GUID)) { + efi.mps = table; + pr_cont(" MPS=0x%lx ", table); + } else if (!efi_guidcmp(guid, ACPI_20_TABLE_GUID)) { + efi.acpi20 = table; + pr_cont(" ACPI 2.0=0x%lx ", table); + } else if (!efi_guidcmp(guid, ACPI_TABLE_GUID)) { + efi.acpi = table; + pr_cont(" ACPI=0x%lx ", table); + } else if (!efi_guidcmp(guid, SMBIOS_TABLE_GUID)) { + efi.smbios = table; + pr_cont(" SMBIOS=0x%lx ", table); #ifdef CONFIG_X86_UV - } else if (!efi_guidcmp(config_tables[i].guid, - UV_SYSTEM_TABLE_GUID)) { - efi.uv_systab = config_tables[i].table; - printk(" UVsystab=0x%lx ", config_tables[i].table); + } else if (!efi_guidcmp(guid, UV_SYSTEM_TABLE_GUID)) { + efi.uv_systab = table; + pr_cont(" UVsystab=0x%lx ", table); #endif - } else if (!efi_guidcmp(config_tables[i].guid, - HCDP_TABLE_GUID)) { - efi.hcdp = config_tables[i].table; - printk(" HCDP=0x%lx ", config_tables[i].table); - } else if (!efi_guidcmp(config_tables[i].guid, - UGA_IO_PROTOCOL_GUID)) { - efi.uga = config_tables[i].table; - printk(" UGA=0x%lx ", config_tables[i].table); + } else if (!efi_guidcmp(guid, HCDP_TABLE_GUID)) { + efi.hcdp = table; + pr_cont(" HCDP=0x%lx ", table); + } else if (!efi_guidcmp(guid, UGA_IO_PROTOCOL_GUID)) { + efi.uga = table; + pr_cont(" UGA=0x%lx ", table); } + tablep += sz; } - printk("\n"); - early_iounmap(config_tables, - efi.systab->nr_tables * sizeof(efi_config_table_t)); + pr_cont("\n"); + early_iounmap(config_tables, efi.systab->nr_tables * sz); + return 0; +} + +static int __init efi_runtime_init(void) +{ + efi_runtime_services_t *runtime; /* * Check out the runtime services table. We need to map @@ -535,43 +615,116 @@ void __init efi_init(void) */ runtime = early_ioremap((unsigned long)efi.systab->runtime, sizeof(efi_runtime_services_t)); - if (runtime != NULL) { - /* - * We will only need *early* access to the following - * two EFI runtime services 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; - } else - printk(KERN_ERR "Could not map the EFI runtime service " - "table!\n"); + if (!runtime) { + pr_err("Could not map the runtime service table!\n"); + return -ENOMEM; + } + /* + * We will only need *early* access to the following + * two EFI runtime services 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; +} + +static int __init efi_memmap_init(void) +{ /* Map the EFI memory map */ memmap.map = early_ioremap((unsigned long)memmap.phys_map, memmap.nr_map * memmap.desc_size); - if (memmap.map == NULL) - printk(KERN_ERR "Could not map the EFI memory map!\n"); + if (memmap.map == NULL) { + pr_err("Could not map the memory map!\n"); + return -ENOMEM; + } memmap.map_end = memmap.map + (memmap.nr_map * memmap.desc_size); - if (memmap.desc_size != sizeof(efi_memory_desc_t)) - printk(KERN_WARNING - "Kernel-defined memdesc doesn't match the one from EFI!\n"); - if (add_efi_memmap) do_add_efi_memmap(); + return 0; +} + +void __init efi_init(void) +{ + efi_char16_t *c16; + char vendor[100] = "unknown"; + int i = 0; + void *tmp; + +#ifdef CONFIG_X86_32 + if (boot_params.efi_info.efi_systab_hi || + boot_params.efi_info.efi_memmap_hi) { + pr_info("Table located above 4GB, disabling EFI.\n"); + efi_enabled = 0; + 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)) { + efi_enabled = 0; + return; + } + + /* + * Show what we know for posterity + */ + c16 = tmp = early_ioremap(efi.systab->fw_vendor, 2); + if (c16) { + for (i = 0; i < sizeof(vendor) - 1 && *c16; ++i) + vendor[i] = *c16++; + vendor[i] = '\0'; + } else + pr_err("Could not map the firmware vendor!\n"); + early_iounmap(tmp, 2); + + pr_info("EFI v%u.%.02u by %s\n", + efi.systab->hdr.revision >> 16, + efi.systab->hdr.revision & 0xffff, vendor); + + if (efi_config_init(efi.systab->tables, efi.systab->nr_tables)) { + efi_enabled = 0; + return; + } + + /* + * Note: We currently don't support runtime services on an EFI + * that doesn't match the kernel 32/64-bit mode. + */ + + if (!efi_native) + pr_info("No EFI runtime due to 32/64-bit mismatch with kernel\n"); + else if (efi_runtime_init()) { + efi_enabled = 0; + return; + } + + if (efi_memmap_init()) { + efi_enabled = 0; + return; + } #ifdef CONFIG_X86_32 - x86_platform.get_wallclock = efi_get_time; - x86_platform.set_wallclock = efi_set_rtc_mmss; + if (efi_native) { + x86_platform.get_wallclock = efi_get_time; + x86_platform.set_wallclock = efi_set_rtc_mmss; + } #endif #if EFI_DEBUG @@ -629,6 +782,14 @@ void __init efi_enter_virtual_mode(void) efi.systab = NULL; + /* + * We don't do virtual mode, since we don't do runtime services, on + * non-native EFI + */ + + if (!efi_native) + goto out; + /* Merge contiguous regions of the same type and attribute */ for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) { u64 prev_size; @@ -677,7 +838,7 @@ void __init efi_enter_virtual_mode(void) md->virt_addr = (u64) (unsigned long) va; if (!va) { - printk(KERN_ERR PFX "ioremap of 0x%llX failed!\n", + pr_err("ioremap of 0x%llX failed!\n", (unsigned long long)md->phys_addr); continue; } @@ -711,8 +872,8 @@ void __init efi_enter_virtual_mode(void) (efi_memory_desc_t *)__pa(new_memmap)); if (status != EFI_SUCCESS) { - printk(KERN_ALERT "Unable to switch EFI into virtual mode " - "(status=%lx)!\n", status); + pr_alert("Unable to switch EFI into virtual mode " + "(status=%lx)!\n", status); panic("EFI call to SetVirtualAddressMap() failed!"); } @@ -744,6 +905,8 @@ void __init efi_enter_virtual_mode(void) efi.query_capsule_caps = virt_efi_query_capsule_caps; if (__supported_pte_mask & _PAGE_NX) runtime_code_page_mkexec(); + +out: early_iounmap(memmap.map, memmap.nr_map * memmap.desc_size); memmap.map = NULL; kfree(new_memmap); |