1 // SPDX-License-Identifier: GPL-2.0-only
5  * This file contains the setup_arch() code, which handles the architecture-dependent
11 #include <linux/dma-map-ops.h>
24 #include <linux/usb/xhci-dbgp.h>
51 #include <asm/pci-direct.h>
175  * copy_edd() - Copy the BIOS EDD information
195 	size_t mask = align - 1;  in extend_brk()
222 				 _brk_end - _brk_start);  in reserve_brk()
261 	/* We need to move the initrd down into directly mapped mem */  in relocate_initrd()
270 	printk(KERN_INFO "Allocated new RAMDISK: [mem %#010llx-%#010llx]\n",  in relocate_initrd()
271 	       relocated_ramdisk, relocated_ramdisk + ramdisk_size - 1);  in relocate_initrd()
275 	printk(KERN_INFO "Move RAMDISK from [mem %#010llx-%#010llx] to"  in relocate_initrd()
276 		" [mem %#010llx-%#010llx]\n",  in relocate_initrd()
277 		ramdisk_image, ramdisk_image + ramdisk_size - 1,  in relocate_initrd()
278 		relocated_ramdisk, relocated_ramdisk + ramdisk_size - 1);  in relocate_initrd()
292 	memblock_reserve(ramdisk_image, ramdisk_end - ramdisk_image);  in early_reserve_initrd()
308 	printk(KERN_INFO "RAMDISK: [mem %#010llx-%#010llx]\n", ramdisk_image,  in reserve_initrd()
309 			ramdisk_end - 1);  in reserve_initrd()
321 	memblock_phys_free(ramdisk_image, ramdisk_end - ramdisk_image);  in reserve_initrd()
344 	if (data->size) {  in add_early_ima_buffer()
345 		memblock_reserve(data->addr, data->size);  in add_early_ima_buffer()
346 		ima_kexec_buffer_phys = data->addr;  in add_early_ima_buffer()
347 		ima_kexec_buffer_size = data->size;  in add_early_ima_buffer()
360 		return -ENOENT;  in ima_free_kexec_buffer()
374 		return -ENOENT;  in ima_get_kexec_buffer()
393 		data_len = data->len + sizeof(struct setup_data);  in parse_setup_data()
394 		data_type = data->type;  in parse_setup_data()
395 		pa_next = data->next;  in parse_setup_data()
413 			add_bootloader_randomness(data->data, data->len);  in parse_setup_data()
415 			memzero_explicit(data->data, data->len);  in parse_setup_data()
417 			memzero_explicit(&data->len, sizeof(data->len));  in parse_setup_data()
443 		pa_next = data->next;  in memblock_x86_reserve_range_setup_data()
445 		memblock_reserve(pa_data, sizeof(*data) + data->len);  in memblock_x86_reserve_range_setup_data()
447 		if (data->type == SETUP_INDIRECT) {  in memblock_x86_reserve_range_setup_data()
448 			len += data->len;  in memblock_x86_reserve_range_setup_data()
456 			indirect = (struct setup_indirect *)data->data;  in memblock_x86_reserve_range_setup_data()
458 			if (indirect->type != SETUP_INDIRECT)  in memblock_x86_reserve_range_setup_data()
459 				memblock_reserve(indirect->addr, indirect->len);  in memblock_x86_reserve_range_setup_data()
575 	printk(KERN_DEBUG "reserving inaccessible SNB gfx pages\n");  in trim_snb_memory()
582 	 * To avoid these pages being ever accessed by SNB gfx devices reserve  in trim_snb_memory()
610 	 * area (640Kb -> 1Mb) as RAM even though it is not.  in trim_bios_range()
613 	e820__range_remove(BIOS_BEGIN, BIOS_END - BIOS_BEGIN, E820_TYPE_RAM, 1);  in trim_bios_range()
622 	u64 size = __pa_symbol(_end) - start;  in e820_add_kernel_range()
628 	 * exclude kernel range. If we really are running on top non-RAM,  in e820_add_kernel_range()
648 			 (unsigned long)__end_of_kernel_reserve - (unsigned long)_text);  in early_reserve_memory()
678 		pr_emerg("Kernel Offset: 0x%lx from 0x%lx (relocation range: 0x%lx-0x%lx)\n",  in dump_kernel_offset()
682 			 MODULES_VADDR-1);  in dump_kernel_offset()
707 		/* 32bit non-PAE kernel, NX cannot be used */  in x86_report_nx()
709 		       "cannot be enabled: non-PAE kernel!\n");  in x86_report_nx()
722  * setup_arch - architecture-specific boot-time initializations
816 	iomem_resource.end = (1ULL << boot_cpu_data.x86_phys_bits) - 1;  in setup_arch()
827 	code_resource.end = __pa_symbol(_etext)-1;  in setup_arch()
829 	rodata_resource.end = __pa_symbol(__end_rodata)-1;  in setup_arch()
831 	data_resource.end = __pa_symbol(_edata)-1;  in setup_arch()
833 	bss_resource.end = __pa_symbol(__bss_stop)-1;  in setup_arch()
865 	 * Memory used by the kernel cannot be hot-removed because Linux  in setup_arch()
875 	 * node the kernel resides in as un-hotpluggable.  in setup_arch()
877 	 * Since on modern servers, one node could have double-digit  in setup_arch()
879 	 * image is also un-hotpluggable. So before SRAT is parsed, just  in setup_arch()
910 	 * For some guest types (Xen PV, SEV-SNP, TDX) it is required to be  in setup_arch()
939 	 * partially used pages are not usable - thus  in setup_arch()
963 	/* How many end-of-memory variables you have, grandma! */  in setup_arch()
965 	if (max_pfn > (1UL<<(32 - PAGE_SHIFT)))  in setup_arch()
970 	high_memory = (void *)__va(max_pfn * PAGE_SIZE - 1) + 1;  in setup_arch()
974 	 * Find and reserve possible boot-time SMP configuration:  in setup_arch()
1017 	printk(KERN_DEBUG "initial memory mapped: [mem 0x00000000-%#010lx]\n",  in setup_arch()
1018 			(max_pfn_mapped<<PAGE_SHIFT) - 1);  in setup_arch()
1023 	 * there is not enough free memory under 1M, on EFI-enabled systems  in setup_arch()
1046 	 * auditing all the early-boot CR4 manipulation would be needed to  in setup_arch()
1057 	 * NOTE: On x86-32, only from this point on, fixmaps are ready for use.  in setup_arch()
1101 		hugetlb_cma_reserve(PUD_SHIFT - PAGE_SHIFT);  in setup_arch()
1141 	 * get boot-time SMP configuration:  in setup_arch()
1178 	 * This needs to run before setup_local_APIC() which soft-disables the  in setup_arch()