18f75582aSVasily Gorbik // SPDX-License-Identifier: GPL-2.0 28f75582aSVasily Gorbik #include <linux/string.h> 3805bc0bcSGerald Schaefer #include <linux/elf.h> 473045a08SVasily Gorbik #include <asm/boot_data.h> 5a80313ffSGerald Schaefer #include <asm/sections.h> 6d7e7fbbaSVasily Gorbik #include <asm/cpu_mf.h> 715426ca4SVasily Gorbik #include <asm/setup.h> 80c4f2623SVasily Gorbik #include <asm/kasan.h> 9805bc0bcSGerald Schaefer #include <asm/kexec.h> 107516fc11SVasily Gorbik #include <asm/sclp.h> 11a80313ffSGerald Schaefer #include <asm/diag.h> 125abb9351SVasily Gorbik #include <asm/uv.h> 138f75582aSVasily Gorbik #include "compressed/decompressor.h" 148f75582aSVasily Gorbik #include "boot.h" 15c5cf5054SAlexander Egorenkov #include "uv.h" 168f75582aSVasily Gorbik 17b2d24b97SGerald Schaefer unsigned long __bootdata_preserved(__kaslr_offset); 180c4f2623SVasily Gorbik unsigned long __bootdata_preserved(VMALLOC_START); 190c4f2623SVasily Gorbik unsigned long __bootdata_preserved(VMALLOC_END); 200c4f2623SVasily Gorbik struct page *__bootdata_preserved(vmemmap); 210c4f2623SVasily Gorbik unsigned long __bootdata_preserved(vmemmap_size); 220c4f2623SVasily Gorbik unsigned long __bootdata_preserved(MODULES_VADDR); 230c4f2623SVasily Gorbik unsigned long __bootdata_preserved(MODULES_END); 2473045a08SVasily Gorbik unsigned long __bootdata(ident_map_size); 259f744abbSAlexander Egorenkov int __bootdata(is_full_image) = 1; 26*84733284SAlexander Egorenkov struct initrd_data __bootdata(initrd_data); 27d1b52a43SVasily Gorbik 2817e89e13SSven Schnelle u64 __bootdata_preserved(stfle_fac_list[16]); 2917e89e13SSven Schnelle u64 __bootdata_preserved(alt_stfle_fac_list[16]); 3017e89e13SSven Schnelle 31a80313ffSGerald Schaefer /* 32a80313ffSGerald Schaefer * Some code and data needs to stay below 2 GB, even when the kernel would be 33a80313ffSGerald Schaefer * relocated above 2 GB, because it has to use 31 bit addresses. 34a80313ffSGerald Schaefer * Such code and data is part of the .dma section, and its location is passed 35a80313ffSGerald Schaefer * over to the decompressed / relocated kernel via the .boot.preserved.data 36a80313ffSGerald Schaefer * section. 37a80313ffSGerald Schaefer */ 38a80313ffSGerald Schaefer unsigned long __bootdata_preserved(__sdma) = __pa(&_sdma); 39a80313ffSGerald Schaefer unsigned long __bootdata_preserved(__edma) = __pa(&_edma); 40a80313ffSGerald Schaefer unsigned long __bootdata_preserved(__stext_dma) = __pa(&_stext_dma); 41a80313ffSGerald Schaefer unsigned long __bootdata_preserved(__etext_dma) = __pa(&_etext_dma); 42a80313ffSGerald Schaefer struct exception_table_entry * 43a80313ffSGerald Schaefer __bootdata_preserved(__start_dma_ex_table) = _start_dma_ex_table; 44a80313ffSGerald Schaefer struct exception_table_entry * 45a80313ffSGerald Schaefer __bootdata_preserved(__stop_dma_ex_table) = _stop_dma_ex_table; 46a80313ffSGerald Schaefer 47a80313ffSGerald Schaefer int _diag210_dma(struct diag210 *addr); 48a80313ffSGerald Schaefer int _diag26c_dma(void *req, void *resp, enum diag26c_sc subcode); 49a80313ffSGerald Schaefer int _diag14_dma(unsigned long rx, unsigned long ry1, unsigned long subcode); 50a80313ffSGerald Schaefer void _diag0c_dma(struct hypfs_diag0c_entry *entry); 51a80313ffSGerald Schaefer void _diag308_reset_dma(void); 52a80313ffSGerald Schaefer struct diag_ops __bootdata_preserved(diag_dma_ops) = { 53a80313ffSGerald Schaefer .diag210 = _diag210_dma, 54a80313ffSGerald Schaefer .diag26c = _diag26c_dma, 55a80313ffSGerald Schaefer .diag14 = _diag14_dma, 56a80313ffSGerald Schaefer .diag0c = _diag0c_dma, 57a80313ffSGerald Schaefer .diag308_reset = _diag308_reset_dma 58a80313ffSGerald Schaefer }; 5933def849SJoe Perches static struct diag210 _diag210_tmp_dma __section(".dma.data"); 60a80313ffSGerald Schaefer struct diag210 *__bootdata_preserved(__diag210_tmp_dma) = &_diag210_tmp_dma; 61a80313ffSGerald Schaefer 627516fc11SVasily Gorbik void error(char *x) 637516fc11SVasily Gorbik { 647516fc11SVasily Gorbik sclp_early_printk("\n\n"); 657516fc11SVasily Gorbik sclp_early_printk(x); 667516fc11SVasily Gorbik sclp_early_printk("\n\n -- System halted"); 677516fc11SVasily Gorbik 6898587c2dSMartin Schwidefsky disabled_wait(); 697516fc11SVasily Gorbik } 707516fc11SVasily Gorbik 71d7e7fbbaSVasily Gorbik static void setup_lpp(void) 72d7e7fbbaSVasily Gorbik { 73d7e7fbbaSVasily Gorbik S390_lowcore.current_pid = 0; 74d7e7fbbaSVasily Gorbik S390_lowcore.lpp = LPP_MAGIC; 75d7e7fbbaSVasily Gorbik if (test_facility(40)) 76d7e7fbbaSVasily Gorbik lpp(&S390_lowcore.lpp); 77d7e7fbbaSVasily Gorbik } 78d7e7fbbaSVasily Gorbik 7915426ca4SVasily Gorbik #ifdef CONFIG_KERNEL_UNCOMPRESSED 8015426ca4SVasily Gorbik unsigned long mem_safe_offset(void) 8115426ca4SVasily Gorbik { 8215426ca4SVasily Gorbik return vmlinux.default_lma + vmlinux.image_size + vmlinux.bss_size; 8315426ca4SVasily Gorbik } 8415426ca4SVasily Gorbik #endif 8515426ca4SVasily Gorbik 869641b8ccSMartin Schwidefsky static void rescue_initrd(unsigned long addr) 8715426ca4SVasily Gorbik { 8815426ca4SVasily Gorbik if (!IS_ENABLED(CONFIG_BLK_DEV_INITRD)) 8915426ca4SVasily Gorbik return; 90*84733284SAlexander Egorenkov if (!initrd_data.start || !initrd_data.size) 9115426ca4SVasily Gorbik return; 92*84733284SAlexander Egorenkov if (addr <= initrd_data.start) 9315426ca4SVasily Gorbik return; 94*84733284SAlexander Egorenkov memmove((void *)addr, (void *)initrd_data.start, initrd_data.size); 95*84733284SAlexander Egorenkov initrd_data.start = addr; 9615426ca4SVasily Gorbik } 9715426ca4SVasily Gorbik 98d1b52a43SVasily Gorbik static void copy_bootdata(void) 99d1b52a43SVasily Gorbik { 100d1b52a43SVasily Gorbik if (__boot_data_end - __boot_data_start != vmlinux.bootdata_size) 101d1b52a43SVasily Gorbik error(".boot.data section size mismatch"); 102d1b52a43SVasily Gorbik memcpy((void *)vmlinux.bootdata_off, __boot_data_start, vmlinux.bootdata_size); 103bf9921a9SGerald Schaefer if (__boot_data_preserved_end - __boot_data_preserved_start != vmlinux.bootdata_preserved_size) 104bf9921a9SGerald Schaefer error(".boot.preserved.data section size mismatch"); 105bf9921a9SGerald Schaefer memcpy((void *)vmlinux.bootdata_preserved_off, __boot_data_preserved_start, vmlinux.bootdata_preserved_size); 106d1b52a43SVasily Gorbik } 107d1b52a43SVasily Gorbik 108805bc0bcSGerald Schaefer static void handle_relocs(unsigned long offset) 109805bc0bcSGerald Schaefer { 110805bc0bcSGerald Schaefer Elf64_Rela *rela_start, *rela_end, *rela; 111805bc0bcSGerald Schaefer int r_type, r_sym, rc; 112805bc0bcSGerald Schaefer Elf64_Addr loc, val; 113805bc0bcSGerald Schaefer Elf64_Sym *dynsym; 114805bc0bcSGerald Schaefer 115805bc0bcSGerald Schaefer rela_start = (Elf64_Rela *) vmlinux.rela_dyn_start; 116805bc0bcSGerald Schaefer rela_end = (Elf64_Rela *) vmlinux.rela_dyn_end; 117805bc0bcSGerald Schaefer dynsym = (Elf64_Sym *) vmlinux.dynsym_start; 118805bc0bcSGerald Schaefer for (rela = rela_start; rela < rela_end; rela++) { 119805bc0bcSGerald Schaefer loc = rela->r_offset + offset; 120ac49303dSGerald Schaefer val = rela->r_addend; 121805bc0bcSGerald Schaefer r_sym = ELF64_R_SYM(rela->r_info); 122ac49303dSGerald Schaefer if (r_sym) { 123ac49303dSGerald Schaefer if (dynsym[r_sym].st_shndx != SHN_UNDEF) 124ac49303dSGerald Schaefer val += dynsym[r_sym].st_value + offset; 125ac49303dSGerald Schaefer } else { 126ac49303dSGerald Schaefer /* 127ac49303dSGerald Schaefer * 0 == undefined symbol table index (STN_UNDEF), 128ac49303dSGerald Schaefer * used for R_390_RELATIVE, only add KASLR offset 129ac49303dSGerald Schaefer */ 130ac49303dSGerald Schaefer val += offset; 131ac49303dSGerald Schaefer } 132805bc0bcSGerald Schaefer r_type = ELF64_R_TYPE(rela->r_info); 133805bc0bcSGerald Schaefer rc = arch_kexec_do_relocs(r_type, (void *) loc, val, 0); 134805bc0bcSGerald Schaefer if (rc) 135805bc0bcSGerald Schaefer error("Unknown relocation type"); 136805bc0bcSGerald Schaefer } 137805bc0bcSGerald Schaefer } 138805bc0bcSGerald Schaefer 139980d5f9aSAlexander Egorenkov /* 14073045a08SVasily Gorbik * Merge information from several sources into a single ident_map_size value. 14173045a08SVasily Gorbik * "ident_map_size" represents the upper limit of physical memory we may ever 14273045a08SVasily Gorbik * reach. It might not be all online memory, but also include standby (offline) 14373045a08SVasily Gorbik * memory. "ident_map_size" could be lower then actual standby or even online 14473045a08SVasily Gorbik * memory present, due to limiting factors. We should never go above this limit. 14573045a08SVasily Gorbik * It is the size of our identity mapping. 14673045a08SVasily Gorbik * 14773045a08SVasily Gorbik * Consider the following factors: 14873045a08SVasily Gorbik * 1. max_physmem_end - end of physical memory online or standby. 14973045a08SVasily Gorbik * Always <= end of the last online memory block (get_mem_detect_end()). 15073045a08SVasily Gorbik * 2. CONFIG_MAX_PHYSMEM_BITS - the maximum size of physical memory the 15173045a08SVasily Gorbik * kernel is able to support. 15273045a08SVasily Gorbik * 3. "mem=" kernel command line option which limits physical memory usage. 15373045a08SVasily Gorbik * 4. OLDMEM_BASE which is a kdump memory limit when the kernel is executed as 15473045a08SVasily Gorbik * crash kernel. 15573045a08SVasily Gorbik * 5. "hsa" size which is a memory limit when the kernel is executed during 15673045a08SVasily Gorbik * zfcp/nvme dump. 15773045a08SVasily Gorbik */ 15873045a08SVasily Gorbik static void setup_ident_map_size(unsigned long max_physmem_end) 15973045a08SVasily Gorbik { 16073045a08SVasily Gorbik unsigned long hsa_size; 16173045a08SVasily Gorbik 16273045a08SVasily Gorbik ident_map_size = max_physmem_end; 16373045a08SVasily Gorbik if (memory_limit) 16473045a08SVasily Gorbik ident_map_size = min(ident_map_size, memory_limit); 16573045a08SVasily Gorbik ident_map_size = min(ident_map_size, 1UL << MAX_PHYSMEM_BITS); 16673045a08SVasily Gorbik 16773045a08SVasily Gorbik #ifdef CONFIG_CRASH_DUMP 16873045a08SVasily Gorbik if (OLDMEM_BASE) { 16973045a08SVasily Gorbik kaslr_enabled = 0; 17073045a08SVasily Gorbik ident_map_size = min(ident_map_size, OLDMEM_SIZE); 17173045a08SVasily Gorbik } else if (ipl_block_valid && is_ipl_block_dump()) { 17273045a08SVasily Gorbik kaslr_enabled = 0; 17373045a08SVasily Gorbik if (!sclp_early_get_hsa_size(&hsa_size) && hsa_size) 17473045a08SVasily Gorbik ident_map_size = min(ident_map_size, hsa_size); 17573045a08SVasily Gorbik } 17673045a08SVasily Gorbik #endif 17773045a08SVasily Gorbik } 17873045a08SVasily Gorbik 1790c4f2623SVasily Gorbik static void setup_kernel_memory_layout(void) 1800c4f2623SVasily Gorbik { 1810c4f2623SVasily Gorbik bool vmalloc_size_verified = false; 1820c4f2623SVasily Gorbik unsigned long vmemmap_off; 1830c4f2623SVasily Gorbik unsigned long vspace_left; 1840c4f2623SVasily Gorbik unsigned long rte_size; 1850c4f2623SVasily Gorbik unsigned long pages; 1860c4f2623SVasily Gorbik unsigned long vmax; 1870c4f2623SVasily Gorbik 1880c4f2623SVasily Gorbik pages = ident_map_size / PAGE_SIZE; 1890c4f2623SVasily Gorbik /* vmemmap contains a multiple of PAGES_PER_SECTION struct pages */ 1900c4f2623SVasily Gorbik vmemmap_size = SECTION_ALIGN_UP(pages) * sizeof(struct page); 1910c4f2623SVasily Gorbik 1920c4f2623SVasily Gorbik /* choose kernel address space layout: 4 or 3 levels. */ 1930c4f2623SVasily Gorbik vmemmap_off = round_up(ident_map_size, _REGION3_SIZE); 1940c4f2623SVasily Gorbik if (IS_ENABLED(CONFIG_KASAN) || 1950c4f2623SVasily Gorbik vmalloc_size > _REGION2_SIZE || 1960c4f2623SVasily Gorbik vmemmap_off + vmemmap_size + vmalloc_size + MODULES_LEN > _REGION2_SIZE) 1970c4f2623SVasily Gorbik vmax = _REGION1_SIZE; 1980c4f2623SVasily Gorbik else 1990c4f2623SVasily Gorbik vmax = _REGION2_SIZE; 2000c4f2623SVasily Gorbik 2010c4f2623SVasily Gorbik /* keep vmemmap_off aligned to a top level region table entry */ 2020c4f2623SVasily Gorbik rte_size = vmax == _REGION1_SIZE ? _REGION2_SIZE : _REGION3_SIZE; 2030c4f2623SVasily Gorbik MODULES_END = vmax; 2040c4f2623SVasily Gorbik if (is_prot_virt_host()) { 2050c4f2623SVasily Gorbik /* 2060c4f2623SVasily Gorbik * forcing modules and vmalloc area under the ultravisor 2070c4f2623SVasily Gorbik * secure storage limit, so that any vmalloc allocation 2080c4f2623SVasily Gorbik * we do could be used to back secure guest storage. 2090c4f2623SVasily Gorbik */ 2100c4f2623SVasily Gorbik adjust_to_uv_max(&MODULES_END); 2110c4f2623SVasily Gorbik } 2120c4f2623SVasily Gorbik 2130c4f2623SVasily Gorbik #ifdef CONFIG_KASAN 2140c4f2623SVasily Gorbik if (MODULES_END < vmax) { 2150c4f2623SVasily Gorbik /* force vmalloc and modules below kasan shadow */ 2160c4f2623SVasily Gorbik MODULES_END = min(MODULES_END, KASAN_SHADOW_START); 2170c4f2623SVasily Gorbik } else { 2180c4f2623SVasily Gorbik /* 2190c4f2623SVasily Gorbik * leave vmalloc and modules above kasan shadow but make 2200c4f2623SVasily Gorbik * sure they don't overlap with it 2210c4f2623SVasily Gorbik */ 2220c4f2623SVasily Gorbik vmalloc_size = min(vmalloc_size, vmax - KASAN_SHADOW_END - MODULES_LEN); 2230c4f2623SVasily Gorbik vmalloc_size_verified = true; 2240c4f2623SVasily Gorbik vspace_left = KASAN_SHADOW_START; 2250c4f2623SVasily Gorbik } 2260c4f2623SVasily Gorbik #endif 2270c4f2623SVasily Gorbik MODULES_VADDR = MODULES_END - MODULES_LEN; 2280c4f2623SVasily Gorbik VMALLOC_END = MODULES_VADDR; 2290c4f2623SVasily Gorbik 2300c4f2623SVasily Gorbik if (vmalloc_size_verified) { 2310c4f2623SVasily Gorbik VMALLOC_START = VMALLOC_END - vmalloc_size; 2320c4f2623SVasily Gorbik } else { 2330c4f2623SVasily Gorbik vmemmap_off = round_up(ident_map_size, rte_size); 2340c4f2623SVasily Gorbik 2350c4f2623SVasily Gorbik if (vmemmap_off + vmemmap_size > VMALLOC_END || 2360c4f2623SVasily Gorbik vmalloc_size > VMALLOC_END - vmemmap_off - vmemmap_size) { 2370c4f2623SVasily Gorbik /* 2380c4f2623SVasily Gorbik * allow vmalloc area to occupy up to 1/2 of 2390c4f2623SVasily Gorbik * the rest virtual space left. 2400c4f2623SVasily Gorbik */ 2410c4f2623SVasily Gorbik vmalloc_size = min(vmalloc_size, VMALLOC_END / 2); 2420c4f2623SVasily Gorbik } 2430c4f2623SVasily Gorbik VMALLOC_START = VMALLOC_END - vmalloc_size; 2440c4f2623SVasily Gorbik vspace_left = VMALLOC_START; 2450c4f2623SVasily Gorbik } 2460c4f2623SVasily Gorbik 2470c4f2623SVasily Gorbik pages = vspace_left / (PAGE_SIZE + sizeof(struct page)); 2480c4f2623SVasily Gorbik pages = SECTION_ALIGN_UP(pages); 2490c4f2623SVasily Gorbik vmemmap_off = round_up(vspace_left - pages * sizeof(struct page), rte_size); 2500c4f2623SVasily Gorbik /* keep vmemmap left most starting from a fresh region table entry */ 2510c4f2623SVasily Gorbik vmemmap_off = min(vmemmap_off, round_up(ident_map_size, rte_size)); 2520c4f2623SVasily Gorbik /* take care that identity map is lower then vmemmap */ 2530c4f2623SVasily Gorbik ident_map_size = min(ident_map_size, vmemmap_off); 2540c4f2623SVasily Gorbik vmemmap_size = SECTION_ALIGN_UP(ident_map_size / PAGE_SIZE) * sizeof(struct page); 2550c4f2623SVasily Gorbik VMALLOC_START = max(vmemmap_off + vmemmap_size, VMALLOC_START); 2560c4f2623SVasily Gorbik vmemmap = (struct page *)vmemmap_off; 2570c4f2623SVasily Gorbik } 2580c4f2623SVasily Gorbik 25973045a08SVasily Gorbik /* 260980d5f9aSAlexander Egorenkov * This function clears the BSS section of the decompressed Linux kernel and NOT the decompressor's. 261980d5f9aSAlexander Egorenkov */ 2622e83e0ebSVasily Gorbik static void clear_bss_section(void) 2632e83e0ebSVasily Gorbik { 2642e83e0ebSVasily Gorbik memset((void *)vmlinux.default_lma + vmlinux.image_size, 0, vmlinux.bss_size); 2652e83e0ebSVasily Gorbik } 2662e83e0ebSVasily Gorbik 26790178c19SHeiko Carstens /* 26890178c19SHeiko Carstens * Set vmalloc area size to an 8th of (potential) physical memory 26990178c19SHeiko Carstens * size, unless size has been set by kernel command line parameter. 27090178c19SHeiko Carstens */ 27190178c19SHeiko Carstens static void setup_vmalloc_size(void) 27290178c19SHeiko Carstens { 27390178c19SHeiko Carstens unsigned long size; 27490178c19SHeiko Carstens 27590178c19SHeiko Carstens if (vmalloc_size_set) 27690178c19SHeiko Carstens return; 27773045a08SVasily Gorbik size = round_up(ident_map_size / 8, _SEGMENT_SIZE); 27890178c19SHeiko Carstens vmalloc_size = max(size, vmalloc_size); 27990178c19SHeiko Carstens } 28090178c19SHeiko Carstens 2818f75582aSVasily Gorbik void startup_kernel(void) 2828f75582aSVasily Gorbik { 283b2d24b97SGerald Schaefer unsigned long random_lma; 2849641b8ccSMartin Schwidefsky unsigned long safe_addr; 285369f91c3SVasily Gorbik void *img; 2868f75582aSVasily Gorbik 287*84733284SAlexander Egorenkov initrd_data.start = parmarea.initrd_start; 288*84733284SAlexander Egorenkov initrd_data.size = parmarea.initrd_size; 289*84733284SAlexander Egorenkov 290d7e7fbbaSVasily Gorbik setup_lpp(); 29149698745SVasily Gorbik store_ipl_parmblock(); 2929641b8ccSMartin Schwidefsky safe_addr = mem_safe_offset(); 2939641b8ccSMartin Schwidefsky safe_addr = read_ipl_report(safe_addr); 2949641b8ccSMartin Schwidefsky uv_query_info(); 2959641b8ccSMartin Schwidefsky rescue_initrd(safe_addr); 2969641b8ccSMartin Schwidefsky sclp_early_read_info(); 29749698745SVasily Gorbik setup_boot_command_line(); 298b5e80459SVasily Gorbik parse_boot_command_line(); 29942c89439SAlexander Egorenkov sanitize_prot_virt_host(); 30073045a08SVasily Gorbik setup_ident_map_size(detect_memory()); 30190178c19SHeiko Carstens setup_vmalloc_size(); 3020c4f2623SVasily Gorbik setup_kernel_memory_layout(); 303b2d24b97SGerald Schaefer 304b2d24b97SGerald Schaefer random_lma = __kaslr_offset = 0; 305b2d24b97SGerald Schaefer if (IS_ENABLED(CONFIG_RANDOMIZE_BASE) && kaslr_enabled) { 306b2d24b97SGerald Schaefer random_lma = get_random_base(safe_addr); 307b2d24b97SGerald Schaefer if (random_lma) { 308b2d24b97SGerald Schaefer __kaslr_offset = random_lma - vmlinux.default_lma; 309b2d24b97SGerald Schaefer img = (void *)vmlinux.default_lma; 310b2d24b97SGerald Schaefer vmlinux.default_lma += __kaslr_offset; 311b2d24b97SGerald Schaefer vmlinux.entry += __kaslr_offset; 312b2d24b97SGerald Schaefer vmlinux.bootdata_off += __kaslr_offset; 313b2d24b97SGerald Schaefer vmlinux.bootdata_preserved_off += __kaslr_offset; 314b2d24b97SGerald Schaefer vmlinux.rela_dyn_start += __kaslr_offset; 315b2d24b97SGerald Schaefer vmlinux.rela_dyn_end += __kaslr_offset; 316b2d24b97SGerald Schaefer vmlinux.dynsym_start += __kaslr_offset; 317b2d24b97SGerald Schaefer } 318b2d24b97SGerald Schaefer } 319b2d24b97SGerald Schaefer 3208f75582aSVasily Gorbik if (!IS_ENABLED(CONFIG_KERNEL_UNCOMPRESSED)) { 321369f91c3SVasily Gorbik img = decompress_kernel(); 322369f91c3SVasily Gorbik memmove((void *)vmlinux.default_lma, img, vmlinux.image_size); 323b2d24b97SGerald Schaefer } else if (__kaslr_offset) 324b2d24b97SGerald Schaefer memcpy((void *)vmlinux.default_lma, img, vmlinux.image_size); 325b2d24b97SGerald Schaefer 3262e83e0ebSVasily Gorbik clear_bss_section(); 327d1b52a43SVasily Gorbik copy_bootdata(); 328805bc0bcSGerald Schaefer if (IS_ENABLED(CONFIG_RELOCATABLE)) 329b2d24b97SGerald Schaefer handle_relocs(__kaslr_offset); 330b2d24b97SGerald Schaefer 331b2d24b97SGerald Schaefer if (__kaslr_offset) { 332a9f2f686SGerald Schaefer /* 333a9f2f686SGerald Schaefer * Save KASLR offset for early dumps, before vmcore_info is set. 334a9f2f686SGerald Schaefer * Mark as uneven to distinguish from real vmcore_info pointer. 335a9f2f686SGerald Schaefer */ 336a9f2f686SGerald Schaefer S390_lowcore.vmcore_info = __kaslr_offset | 0x1UL; 337b2d24b97SGerald Schaefer /* Clear non-relocated kernel */ 338b2d24b97SGerald Schaefer if (IS_ENABLED(CONFIG_KERNEL_UNCOMPRESSED)) 339b2d24b97SGerald Schaefer memset(img, 0, vmlinux.image_size); 340b2d24b97SGerald Schaefer } 341369f91c3SVasily Gorbik vmlinux.entry(); 3428f75582aSVasily Gorbik } 343