1 // SPDX-License-Identifier: GPL-2.0-only
40  * @security_version_number: Used to prevent against roll back of modules.
45  * 			yyyy=4 digit year, mm=1-12, dd=1-31.
54  * @rsvd_next_header:	32-bit pointer to the next Secure Boot Module in the
60 …rom https://downloadcenter.intel.com/download/23197/Intel-Quark-SoC-X1000-Board-Support-Package-BSP
146 	if (remaining_size - size < EFI_MIN_RESERVE)  in query_variable_store_nonblocking()
181 	if ((remaining_size - size < EFI_MIN_RESERVE) &&  in efi_query_variable_store()
225 		if (remaining_size - size < EFI_MIN_RESERVE)  in efi_query_variable_store()
277 	mr.range.end = addr + size - 1;  in efi_arch_mem_reserve()
310  * - Not within any part of the kernel
311  * - Not the BIOS reserved area (E820_TYPE_RESERVED, E820_TYPE_NVS, etc)
332 		u64 start = md->phys_addr;  in efi_reserve_boot_services()
333 		u64 size = md->num_pages << EFI_PAGE_SHIFT;  in efi_reserve_boot_services()
336 		if (md->type != EFI_BOOT_SERVICES_CODE &&  in efi_reserve_boot_services()
337 		    md->type != EFI_BOOT_SERVICES_DATA)  in efi_reserve_boot_services()
377 		md->attribute |= EFI_MEMORY_RUNTIME;  in efi_reserve_boot_services()
389 	u64 pa = md->phys_addr;  in efi_unmap_pages()
390 	u64 va = md->virt_addr;  in efi_unmap_pages()
400 	if (kernel_unmap_pages_in_pgd(pgd, pa, md->num_pages))  in efi_unmap_pages()
403 	if (kernel_unmap_pages_in_pgd(pgd, va, md->num_pages))  in efi_unmap_pages()
419 		unsigned long long start = md->phys_addr;  in efi_free_boot_services()
420 		unsigned long long size = md->num_pages << EFI_PAGE_SHIFT;  in efi_free_boot_services()
423 		if (md->type != EFI_BOOT_SERVICES_CODE &&  in efi_free_boot_services()
424 		    md->type != EFI_BOOT_SERVICES_DATA) {  in efi_free_boot_services()
430 		if (md->attribute & EFI_MEMORY_RUNTIME) {  in efi_free_boot_services()
443 		 * Nasty quirk: if all sub-1MB memory is used for boot  in efi_free_boot_services()
446 		 * memory back to the memblock allocator, so instead  in efi_free_boot_services()
451 		 * grub2-efi on a hard disk.  (And no, I don't know why  in efi_free_boot_services()
459 			size -= rm_size;  in efi_free_boot_services()
464 		 * - BIOS might clobber it  in efi_free_boot_services()
465 		 * - Crash kernel needs it to be reserved  in efi_free_boot_services()
470 			size -= (SZ_1M - start);  in efi_free_boot_services()
498 		if (!(md->attribute & EFI_MEMORY_RUNTIME) &&  in efi_free_boot_services()
499 		    (md->type == EFI_BOOT_SERVICES_CODE ||  in efi_free_boot_services()
500 		     md->type == EFI_BOOT_SERVICES_DATA))  in efi_free_boot_services()
541 		ret = -ENOMEM;  in efi_reuse_config()
545 	if (!data->smbios)  in efi_reuse_config()
553 		ret = -ENOMEM;  in efi_reuse_config()
560 		guid = ((efi_config_table_64_t *)p)->guid;  in efi_reuse_config()
563 			((efi_config_table_64_t *)p)->table = data->smbios;  in efi_reuse_config()
582 		pr_info("Setup done, disabling due to 32/64-bit mismatch\n");  in efi_apply_memmap_quirks()
588  * For most modern platforms the preferred method of powering off is via
620 	if (csh->csh_signature != QUARK_CSH_SIGNATURE ||  in qrk_capsule_setup_info()
621 	    csh->headersize != QUARK_SECURITY_HEADER_SIZE)  in qrk_capsule_setup_info()
631 	if (csh->rsvd_next_header != 0) {  in qrk_capsule_setup_info()
633 		return -EINVAL;  in qrk_capsule_setup_info()
636 	*pkbuff += csh->headersize;  in qrk_capsule_setup_info()
637 	cap_info->total_size = csh->headersize;  in qrk_capsule_setup_info()
642 	cap_info->phys[0] += csh->headersize;  in qrk_capsule_setup_info()
645 	 * cap_info->capsule should point at a virtual mapping of the entire  in qrk_capsule_setup_info()
650 	 * virtual mapping, let's just point cap_info->capsule at our copy  in qrk_capsule_setup_info()
653 	cap_info->capsule = &cap_info->header;  in qrk_capsule_setup_info()
674 	cap_info->total_size = 0;  in efi_capsule_setup_info()
680 		 *  - a value > 0 if the setup should continue, after advancing  in efi_capsule_setup_info()
682 		 *  - 0 if not enough hdr_bytes are available yet  in efi_capsule_setup_info()
683 		 *  - a negative error code otherwise  in efi_capsule_setup_info()
685 		quirk_handler = (typeof(quirk_handler))id->driver_data;  in efi_capsule_setup_info()
691 	memcpy(&cap_info->header, kbuff, sizeof(cap_info->header));  in efi_capsule_setup_info()
693 	cap_info->total_size += cap_info->header.imagesize;  in efi_capsule_setup_info()
733 	 * Address range 0x0000 - 0x0fff is always mapped in the efi_pgd, so  in efi_crash_gracefully_on_page_fault()
762 	 * calling process to efi_mm. Hence, switch back to task_mm.  in efi_crash_gracefully_on_page_fault()