firmware/efi/efi.c

3  * efi.c - EFI subsystem
9  * This code registers /sys/firmware/efi{,/efivars} when EFI is supported,
11  * The existance of /sys/firmware/efi may also be used by userspace to
22 #include <linux/efi.h>
39 struct efi __read_mostly efi = {
58 EXPORT_SYMBOL(efi);
106 		set_bit(EFI_DBG, &efi.flags);
115 		set_bit(EFI_MEM_NO_SOFT_RESERVE, &efi.flags);
119 early_param("efi", parse_efi_cmdline);
137 	if (efi.acpi20 != EFI_INVALID_TABLE_ADDR)
138 		str += sprintf(str, "ACPI20=0x%lx\n", efi.acpi20);
139 	if (efi.acpi != EFI_INVALID_TABLE_ADDR)
140 		str += sprintf(str, "ACPI=0x%lx\n", efi.acpi);
146 	if (efi.smbios3 != EFI_INVALID_TABLE_ADDR)
147 		str += sprintf(str, "SMBIOS3=0x%lx\n", efi.smbios3);
148 	if (efi.smbios != EFI_INVALID_TABLE_ADDR)
149 		str += sprintf(str, "SMBIOS=0x%lx\n", efi.smbios);
206 	if (!efi.get_next_variable)
208 	status = efi.get_next_variable(&name_size, &name, &guid);
220 	generic_ops.get_variable = efi.get_variable;
221 	generic_ops.get_next_variable = efi.get_next_variable;
223 	generic_ops.query_variable_info = efi.query_variable_info;
226 		generic_ops.set_variable = efi.set_variable;
227 		generic_ops.set_variable_nonblocking = efi.set_variable_nonblocking;
290 		status = efi.get_next_variable(&name_size, name, &guid);
311 		status = efi.get_variable(name, &guid, NULL, &data_size, NULL);
319 		status = efi.get_variable(name, &guid, NULL, &data_size, data);
351 	efi_debugfs = debugfs_create_dir("efi", NULL);
391  * We register the efi subsystem with the firmware subsystem and the
392  * efivars subsystem with the efi subsystem, if the system was booted with
400 		efi.runtime_supported_mask = 0;
405 	if (efi.runtime_supported_mask) {
414 			clear_bit(EFI_RUNTIME_SERVICES, &efi.flags);
415 			efi.runtime_supported_mask = 0;
421 		platform_device_register_simple("rtc-efi", 0, NULL, 0);
423 	/* We register the efi directory at /sys/firmware/efi */
424 	efi_kobj = kobject_create_and_add("efi", firmware_kobj);
426 		pr_err("efi: Firmware registration failed.\n");
444 		pr_err("efi: Sysfs attribute export failed with error %d.\n",
460 	if (efi.coco_secret != EFI_INVALID_TABLE_ADDR)
508  * Find the efi memory descriptor for a given physical address.  Given a
551  * Calculate the highest address of an efi memory descriptor.
594 	{ACPI_20_TABLE_GUID,			&efi.acpi20,		"ACPI 2.0"	},
595 	{ACPI_TABLE_GUID,			&efi.acpi,		"ACPI"		},
596 	{SMBIOS_TABLE_GUID,			&efi.smbios,		"SMBIOS"	},
597 	{SMBIOS3_TABLE_GUID,			&efi.smbios3,		"SMBIOS 3.0"	},
598 	{EFI_SYSTEM_RESOURCE_TABLE_GUID,	&efi.esrt,		"ESRT"		},
601 	{LINUX_EFI_TPM_EVENT_LOG_GUID,		&efi.tpm_log,		"TPMEventLog"	},
602 	{EFI_TCG2_FINAL_EVENTS_TABLE_GUID,	&efi.tpm_final_log,	"TPMFinalLog"	},
603 	{EFI_CC_FINAL_EVENTS_TABLE_GUID,	&efi.tpm_final_log,	"CCFinalLog"	},
611 	{LINUX_EFI_MOK_VARIABLE_TABLE_GUID,	&efi.mokvar_table,	"MOKvar"	},
614 	{LINUX_EFI_COCO_SECRET_AREA_GUID,	&efi.coco_secret,	"CocoSecret"	},
617 	{LINUX_EFI_UNACCEPTED_MEM_TABLE_GUID,	&efi.unaccepted,	"Unaccepted"	},
672 	start = PAGE_ALIGN_DOWN(efi.unaccepted);
713 	set_bit(EFI_CONFIG_TABLES, &efi.flags);
784 			efi.runtime_supported_mask &= tbl->runtime_services_supported;
802 	    efi.unaccepted != EFI_INVALID_TABLE_ADDR) {
805 		unaccepted = early_memremap(efi.unaccepted, sizeof(*unaccepted));
811 				efi.unaccepted = EFI_INVALID_TABLE_ADDR;
877 		efi.runtime_version = EFI_1_10_SYSTEM_TABLE_REVISION;