arch/s390/boot/startup.c - third_party/kernel - Git at Google

 // SPDX-License-Identifier: GPL-2.0
 #include <linux/string.h>
 #include <linux/elf.h>
 #include <asm/boot_data.h>
 #include <asm/sections.h>
 #include <asm/cpu_mf.h>
 #include <asm/setup.h>
 #include <asm/kasan.h>
 #include <asm/kexec.h>
 #include <asm/sclp.h>
 #include <asm/diag.h>
 #include <asm/uv.h>
 #include <asm/abs_lowcore.h>
 #include "decompressor.h"
 #include "boot.h"
 #include "uv.h"

 unsigned long __bootdata_preserved(__kaslr_offset);
 unsigned long __bootdata_preserved(__abs_lowcore);
 unsigned long __bootdata_preserved(__memcpy_real_area);
 unsigned long __bootdata(__amode31_base);
 unsigned long __bootdata_preserved(VMALLOC_START);
 unsigned long __bootdata_preserved(VMALLOC_END);
 struct page *__bootdata_preserved(vmemmap);
 unsigned long __bootdata_preserved(vmemmap_size);
 unsigned long __bootdata_preserved(MODULES_VADDR);
 unsigned long __bootdata_preserved(MODULES_END);
 unsigned long __bootdata(ident_map_size);
 int __bootdata(is_full_image) = 1;
 struct initrd_data __bootdata(initrd_data);

 u64 __bootdata_preserved(stfle_fac_list[16]);
 u64 __bootdata_preserved(alt_stfle_fac_list[16]);
 struct oldmem_data __bootdata_preserved(oldmem_data);

 void error(char *x)
 {
 	sclp_early_printk("\n\n");
 	sclp_early_printk(x);
 	sclp_early_printk("\n\n -- System halted");

 	disabled_wait();
 }

 static void setup_lpp(void)
 {
 	S390_lowcore.current_pid = 0;
 	S390_lowcore.lpp = LPP_MAGIC;
 	if (test_facility(40))
 		lpp(&S390_lowcore.lpp);
 }

 #ifdef CONFIG_KERNEL_UNCOMPRESSED
 unsigned long mem_safe_offset(void)
 {
 	return vmlinux.default_lma + vmlinux.image_size + vmlinux.bss_size;
 }
 #endif

 static unsigned long rescue_initrd(unsigned long safe_addr)
 {
 	if (!IS_ENABLED(CONFIG_BLK_DEV_INITRD))
 		return safe_addr;
 	if (!initrd_data.start || !initrd_data.size)
 		return safe_addr;
 	if (initrd_data.start < safe_addr) {
 		memmove((void *)safe_addr, (void *)initrd_data.start, initrd_data.size);
 		initrd_data.start = safe_addr;
 	}
 	return initrd_data.start + initrd_data.size;
 }

 static void copy_bootdata(void)
 {
 	if (__boot_data_end - __boot_data_start != vmlinux.bootdata_size)
 		error(".boot.data section size mismatch");
 	memcpy((void *)vmlinux.bootdata_off, __boot_data_start, vmlinux.bootdata_size);
 	if (__boot_data_preserved_end - __boot_data_preserved_start != vmlinux.bootdata_preserved_size)
 		error(".boot.preserved.data section size mismatch");
 	memcpy((void *)vmlinux.bootdata_preserved_off, __boot_data_preserved_start, vmlinux.bootdata_preserved_size);
 }

 static void handle_relocs(unsigned long offset)
 {
 	Elf64_Rela *rela_start, *rela_end, *rela;
 	int r_type, r_sym, rc;
 	Elf64_Addr loc, val;
 	Elf64_Sym *dynsym;

 	rela_start = (Elf64_Rela *) vmlinux.rela_dyn_start;
 	rela_end = (Elf64_Rela *) vmlinux.rela_dyn_end;
 	dynsym = (Elf64_Sym *) vmlinux.dynsym_start;
 	for (rela = rela_start; rela < rela_end; rela++) {
 		loc = rela->r_offset + offset;
 		val = rela->r_addend;
 		r_sym = ELF64_R_SYM(rela->r_info);
 		if (r_sym) {
 			if (dynsym[r_sym].st_shndx != SHN_UNDEF)
 				val += dynsym[r_sym].st_value + offset;
 		} else {
 			/*
 			 * 0 == undefined symbol table index (STN_UNDEF),
 			 * used for R_390_RELATIVE, only add KASLR offset
 			 */
 			val += offset;
 		}
 		r_type = ELF64_R_TYPE(rela->r_info);
 		rc = arch_kexec_do_relocs(r_type, (void *) loc, val, 0);
 		if (rc)
 			error("Unknown relocation type");
 	}
 }

 /*
  * Merge information from several sources into a single ident_map_size value.
  * "ident_map_size" represents the upper limit of physical memory we may ever
  * reach. It might not be all online memory, but also include standby (offline)
  * memory. "ident_map_size" could be lower then actual standby or even online
  * memory present, due to limiting factors. We should never go above this limit.
  * It is the size of our identity mapping.
  *
  * Consider the following factors:
  * 1. max_physmem_end - end of physical memory online or standby.
  *    Always <= end of the last online memory block (get_mem_detect_end()).
  * 2. CONFIG_MAX_PHYSMEM_BITS - the maximum size of physical memory the
  *    kernel is able to support.
  * 3. "mem=" kernel command line option which limits physical memory usage.
  * 4. OLDMEM_BASE which is a kdump memory limit when the kernel is executed as
  *    crash kernel.
  * 5. "hsa" size which is a memory limit when the kernel is executed during
  *    zfcp/nvme dump.
  */
 static void setup_ident_map_size(unsigned long max_physmem_end)
 {
 	unsigned long hsa_size;

 	ident_map_size = max_physmem_end;
 	if (memory_limit)
 		ident_map_size = min(ident_map_size, memory_limit);
 	ident_map_size = min(ident_map_size, 1UL << MAX_PHYSMEM_BITS);

 #ifdef CONFIG_CRASH_DUMP
 	if (oldmem_data.start) {
 		kaslr_enabled = 0;
 		ident_map_size = min(ident_map_size, oldmem_data.size);
 	} else if (ipl_block_valid && is_ipl_block_dump()) {
 		kaslr_enabled = 0;
 		if (!sclp_early_get_hsa_size(&hsa_size) && hsa_size)
 			ident_map_size = min(ident_map_size, hsa_size);
 	}
 #endif
 }

 static void setup_kernel_memory_layout(void)
 {
 	unsigned long vmemmap_start;
 	unsigned long rte_size;
 	unsigned long pages;
 	unsigned long vmax;

 	pages = ident_map_size / PAGE_SIZE;
 	/* vmemmap contains a multiple of PAGES_PER_SECTION struct pages */
 	vmemmap_size = SECTION_ALIGN_UP(pages) * sizeof(struct page);

 	/* choose kernel address space layout: 4 or 3 levels. */
 	vmemmap_start = round_up(ident_map_size, _REGION3_SIZE);
 	if (IS_ENABLED(CONFIG_KASAN) ||
 	    vmalloc_size > _REGION2_SIZE ||
 	    vmemmap_start + vmemmap_size + vmalloc_size + MODULES_LEN >
 		    _REGION2_SIZE) {
 		vmax = _REGION1_SIZE;
 		rte_size = _REGION2_SIZE;
 	} else {
 		vmax = _REGION2_SIZE;
 		rte_size = _REGION3_SIZE;
 	}
 	/*
 	 * forcing modules and vmalloc area under the ultravisor
 	 * secure storage limit, so that any vmalloc allocation
 	 * we do could be used to back secure guest storage.
 	 */
 	vmax = adjust_to_uv_max(vmax);
 #ifdef CONFIG_KASAN
 	/* force vmalloc and modules below kasan shadow */
 	vmax = min(vmax, KASAN_SHADOW_START);
 #endif
 	__memcpy_real_area = round_down(vmax - PAGE_SIZE, PAGE_SIZE);
 	__abs_lowcore = round_down(__memcpy_real_area - ABS_LOWCORE_MAP_SIZE,
 				   sizeof(struct lowcore));
 	MODULES_END = round_down(__abs_lowcore, _SEGMENT_SIZE);
 	MODULES_VADDR = MODULES_END - MODULES_LEN;
 	VMALLOC_END = MODULES_VADDR;

 	/* allow vmalloc area to occupy up to about 1/2 of the rest virtual space left */
 	vmalloc_size = min(vmalloc_size, round_down(VMALLOC_END / 2, _REGION3_SIZE));
 	VMALLOC_START = VMALLOC_END - vmalloc_size;

 	/* split remaining virtual space between 1:1 mapping & vmemmap array */
 	pages = VMALLOC_START / (PAGE_SIZE + sizeof(struct page));
 	pages = SECTION_ALIGN_UP(pages);
 	/* keep vmemmap_start aligned to a top level region table entry */
 	vmemmap_start = round_down(VMALLOC_START - pages * sizeof(struct page), rte_size);
 	/* vmemmap_start is the future VMEM_MAX_PHYS, make sure it is within MAX_PHYSMEM */
 	vmemmap_start = min(vmemmap_start, 1UL << MAX_PHYSMEM_BITS);
 	/* make sure identity map doesn't overlay with vmemmap */
 	ident_map_size = min(ident_map_size, vmemmap_start);
 	vmemmap_size = SECTION_ALIGN_UP(ident_map_size / PAGE_SIZE) * sizeof(struct page);
 	/* make sure vmemmap doesn't overlay with vmalloc area */
 	VMALLOC_START = max(vmemmap_start + vmemmap_size, VMALLOC_START);
 	vmemmap = (struct page *)vmemmap_start;
 }

 /*
  * This function clears the BSS section of the decompressed Linux kernel and NOT the decompressor's.
  */
 static void clear_bss_section(void)
 {
 	memset((void *)vmlinux.default_lma + vmlinux.image_size, 0, vmlinux.bss_size);
 }

 /*
  * Set vmalloc area size to an 8th of (potential) physical memory
  * size, unless size has been set by kernel command line parameter.
  */
 static void setup_vmalloc_size(void)
 {
 	unsigned long size;

 	if (vmalloc_size_set)
 		return;
 	size = round_up(ident_map_size / 8, _SEGMENT_SIZE);
 	vmalloc_size = max(size, vmalloc_size);
 }

 static void offset_vmlinux_info(unsigned long offset)
 {
 	vmlinux.default_lma += offset;
 	*(unsigned long *)(&vmlinux.entry) += offset;
 	vmlinux.bootdata_off += offset;
 	vmlinux.bootdata_preserved_off += offset;
 	vmlinux.rela_dyn_start += offset;
 	vmlinux.rela_dyn_end += offset;
 	vmlinux.dynsym_start += offset;
 }

 static unsigned long reserve_amode31(unsigned long safe_addr)
 {
 	__amode31_base = PAGE_ALIGN(safe_addr);
 	return safe_addr + vmlinux.amode31_size;
 }

 void startup_kernel(void)
 {
 	unsigned long max_physmem_end;
 	unsigned long random_lma;
 	unsigned long safe_addr;
 	void *img;

 	initrd_data.start = parmarea.initrd_start;
 	initrd_data.size = parmarea.initrd_size;
 	oldmem_data.start = parmarea.oldmem_base;
 	oldmem_data.size = parmarea.oldmem_size;

 	setup_lpp();
 	store_ipl_parmblock();
 	safe_addr = mem_safe_offset();
 	safe_addr = reserve_amode31(safe_addr);
 	safe_addr = read_ipl_report(safe_addr);
 	uv_query_info();
 	safe_addr = rescue_initrd(safe_addr);
 	sclp_early_read_info();
 	setup_boot_command_line();
 	parse_boot_command_line();
 	sanitize_prot_virt_host();
 	max_physmem_end = detect_memory(&safe_addr);
 	setup_ident_map_size(max_physmem_end);
 	setup_vmalloc_size();
 	setup_kernel_memory_layout();

 	if (IS_ENABLED(CONFIG_RANDOMIZE_BASE) && kaslr_enabled) {
 		random_lma = get_random_base(safe_addr);
 		if (random_lma) {
 			__kaslr_offset = random_lma - vmlinux.default_lma;
 			img = (void *)vmlinux.default_lma;
 			offset_vmlinux_info(__kaslr_offset);
 		}
 	}

 	if (!IS_ENABLED(CONFIG_KERNEL_UNCOMPRESSED)) {
 		img = decompress_kernel();
 		memmove((void *)vmlinux.default_lma, img, vmlinux.image_size);
 	} else if (__kaslr_offset)
 		memcpy((void *)vmlinux.default_lma, img, vmlinux.image_size);

 	clear_bss_section();
 	copy_bootdata();
 	handle_relocs(__kaslr_offset);

 	if (__kaslr_offset) {
 		/*
 		 * Save KASLR offset for early dumps, before vmcore_info is set.
 		 * Mark as uneven to distinguish from real vmcore_info pointer.
 		 */
 		S390_lowcore.vmcore_info = __kaslr_offset | 0x1UL;
 		/* Clear non-relocated kernel */
 		if (IS_ENABLED(CONFIG_KERNEL_UNCOMPRESSED))
 			memset(img, 0, vmlinux.image_size);
 	}
 	vmlinux.entry();
 }
	// SPDX-License-Identifier: GPL-2.0
	#include <linux/string.h>
	#include <linux/elf.h>
	#include <asm/boot_data.h>
	#include <asm/sections.h>
	#include <asm/cpu_mf.h>
	#include <asm/setup.h>
	#include <asm/kasan.h>
	#include <asm/kexec.h>
	#include <asm/sclp.h>
	#include <asm/diag.h>
	#include <asm/uv.h>
	#include <asm/abs_lowcore.h>
	#include "decompressor.h"
	#include "boot.h"
	#include "uv.h"

	unsigned long __bootdata_preserved(__kaslr_offset);
	unsigned long __bootdata_preserved(__abs_lowcore);
	unsigned long __bootdata_preserved(__memcpy_real_area);
	unsigned long __bootdata(__amode31_base);
	unsigned long __bootdata_preserved(VMALLOC_START);
	unsigned long __bootdata_preserved(VMALLOC_END);
	struct page *__bootdata_preserved(vmemmap);
	unsigned long __bootdata_preserved(vmemmap_size);
	unsigned long __bootdata_preserved(MODULES_VADDR);
	unsigned long __bootdata_preserved(MODULES_END);
	unsigned long __bootdata(ident_map_size);
	int __bootdata(is_full_image) = 1;
	struct initrd_data __bootdata(initrd_data);

	u64 __bootdata_preserved(stfle_fac_list[16]);
	u64 __bootdata_preserved(alt_stfle_fac_list[16]);
	struct oldmem_data __bootdata_preserved(oldmem_data);

	void error(char *x)
	{
	sclp_early_printk("\n\n");
	sclp_early_printk(x);
	sclp_early_printk("\n\n -- System halted");

	disabled_wait();
	}

	static void setup_lpp(void)
	{
	S390_lowcore.current_pid = 0;
	S390_lowcore.lpp = LPP_MAGIC;
	if (test_facility(40))
	lpp(&S390_lowcore.lpp);
	}

	#ifdef CONFIG_KERNEL_UNCOMPRESSED
	unsigned long mem_safe_offset(void)
	{
	return vmlinux.default_lma + vmlinux.image_size + vmlinux.bss_size;
	}
	#endif

	static unsigned long rescue_initrd(unsigned long safe_addr)
	{
	if (!IS_ENABLED(CONFIG_BLK_DEV_INITRD))
	return safe_addr;
	if (!initrd_data.start \|\| !initrd_data.size)
	return safe_addr;
	if (initrd_data.start < safe_addr) {
	memmove((void )safe_addr, (void )initrd_data.start, initrd_data.size);
	initrd_data.start = safe_addr;
	}
	return initrd_data.start + initrd_data.size;
	}

	static void copy_bootdata(void)
	{
	if (__boot_data_end - __boot_data_start != vmlinux.bootdata_size)
	error(".boot.data section size mismatch");
	memcpy((void *)vmlinux.bootdata_off, __boot_data_start, vmlinux.bootdata_size);
	if (__boot_data_preserved_end - __boot_data_preserved_start != vmlinux.bootdata_preserved_size)
	error(".boot.preserved.data section size mismatch");
	memcpy((void *)vmlinux.bootdata_preserved_off, __boot_data_preserved_start, vmlinux.bootdata_preserved_size);
	}

	static void handle_relocs(unsigned long offset)
	{
	Elf64_Rela rela_start, rela_end, *rela;
	int r_type, r_sym, rc;
	Elf64_Addr loc, val;
	Elf64_Sym *dynsym;

	rela_start = (Elf64_Rela *) vmlinux.rela_dyn_start;
	rela_end = (Elf64_Rela *) vmlinux.rela_dyn_end;
	dynsym = (Elf64_Sym *) vmlinux.dynsym_start;
	for (rela = rela_start; rela < rela_end; rela++) {
	loc = rela->r_offset + offset;
	val = rela->r_addend;
	r_sym = ELF64_R_SYM(rela->r_info);
	if (r_sym) {
	if (dynsym[r_sym].st_shndx != SHN_UNDEF)
	val += dynsym[r_sym].st_value + offset;
	} else {
	/*
	* 0 == undefined symbol table index (STN_UNDEF),
	* used for R_390_RELATIVE, only add KASLR offset
	*/
	val += offset;
	}
	r_type = ELF64_R_TYPE(rela->r_info);
	rc = arch_kexec_do_relocs(r_type, (void *) loc, val, 0);
	if (rc)
	error("Unknown relocation type");
	}
	}

	/*
	* Merge information from several sources into a single ident_map_size value.
	* "ident_map_size" represents the upper limit of physical memory we may ever
	* reach. It might not be all online memory, but also include standby (offline)
	* memory. "ident_map_size" could be lower then actual standby or even online
	* memory present, due to limiting factors. We should never go above this limit.
	* It is the size of our identity mapping.
	*
	* Consider the following factors:
	* 1. max_physmem_end - end of physical memory online or standby.
	* Always <= end of the last online memory block (get_mem_detect_end()).
	* 2. CONFIG_MAX_PHYSMEM_BITS - the maximum size of physical memory the
	* kernel is able to support.
	* 3. "mem=" kernel command line option which limits physical memory usage.
	* 4. OLDMEM_BASE which is a kdump memory limit when the kernel is executed as
	* crash kernel.
	* 5. "hsa" size which is a memory limit when the kernel is executed during
	* zfcp/nvme dump.
	*/
	static void setup_ident_map_size(unsigned long max_physmem_end)
	{
	unsigned long hsa_size;

	ident_map_size = max_physmem_end;
	if (memory_limit)
	ident_map_size = min(ident_map_size, memory_limit);
	ident_map_size = min(ident_map_size, 1UL << MAX_PHYSMEM_BITS);

	#ifdef CONFIG_CRASH_DUMP
	if (oldmem_data.start) {
	kaslr_enabled = 0;
	ident_map_size = min(ident_map_size, oldmem_data.size);
	} else if (ipl_block_valid && is_ipl_block_dump()) {
	kaslr_enabled = 0;
	if (!sclp_early_get_hsa_size(&hsa_size) && hsa_size)
	ident_map_size = min(ident_map_size, hsa_size);
	}
	#endif
	}

	static void setup_kernel_memory_layout(void)
	{
	unsigned long vmemmap_start;
	unsigned long rte_size;
	unsigned long pages;
	unsigned long vmax;

	pages = ident_map_size / PAGE_SIZE;
	/* vmemmap contains a multiple of PAGES_PER_SECTION struct pages */
	vmemmap_size = SECTION_ALIGN_UP(pages) * sizeof(struct page);

	/* choose kernel address space layout: 4 or 3 levels. */
	vmemmap_start = round_up(ident_map_size, _REGION3_SIZE);
	if (IS_ENABLED(CONFIG_KASAN) \|\|
	vmalloc_size > _REGION2_SIZE \|\|
	vmemmap_start + vmemmap_size + vmalloc_size + MODULES_LEN >
	_REGION2_SIZE) {
	vmax = _REGION1_SIZE;
	rte_size = _REGION2_SIZE;
	} else {
	vmax = _REGION2_SIZE;
	rte_size = _REGION3_SIZE;
	}
	/*
	* forcing modules and vmalloc area under the ultravisor
	* secure storage limit, so that any vmalloc allocation
	* we do could be used to back secure guest storage.
	*/
	vmax = adjust_to_uv_max(vmax);
	#ifdef CONFIG_KASAN
	/* force vmalloc and modules below kasan shadow */
	vmax = min(vmax, KASAN_SHADOW_START);
	#endif
	__memcpy_real_area = round_down(vmax - PAGE_SIZE, PAGE_SIZE);
	__abs_lowcore = round_down(__memcpy_real_area - ABS_LOWCORE_MAP_SIZE,
	sizeof(struct lowcore));
	MODULES_END = round_down(__abs_lowcore, _SEGMENT_SIZE);
	MODULES_VADDR = MODULES_END - MODULES_LEN;
	VMALLOC_END = MODULES_VADDR;

	/* allow vmalloc area to occupy up to about 1/2 of the rest virtual space left */
	vmalloc_size = min(vmalloc_size, round_down(VMALLOC_END / 2, _REGION3_SIZE));
	VMALLOC_START = VMALLOC_END - vmalloc_size;

	/* split remaining virtual space between 1:1 mapping & vmemmap array */
	pages = VMALLOC_START / (PAGE_SIZE + sizeof(struct page));
	pages = SECTION_ALIGN_UP(pages);
	/* keep vmemmap_start aligned to a top level region table entry */
	vmemmap_start = round_down(VMALLOC_START - pages * sizeof(struct page), rte_size);
	/* vmemmap_start is the future VMEM_MAX_PHYS, make sure it is within MAX_PHYSMEM */
	vmemmap_start = min(vmemmap_start, 1UL << MAX_PHYSMEM_BITS);
	/* make sure identity map doesn't overlay with vmemmap */
	ident_map_size = min(ident_map_size, vmemmap_start);
	vmemmap_size = SECTION_ALIGN_UP(ident_map_size / PAGE_SIZE) * sizeof(struct page);
	/* make sure vmemmap doesn't overlay with vmalloc area */
	VMALLOC_START = max(vmemmap_start + vmemmap_size, VMALLOC_START);
	vmemmap = (struct page *)vmemmap_start;
	}

	/*
	* This function clears the BSS section of the decompressed Linux kernel and NOT the decompressor's.
	*/
	static void clear_bss_section(void)
	{
	memset((void *)vmlinux.default_lma + vmlinux.image_size, 0, vmlinux.bss_size);
	}

	/*
	* Set vmalloc area size to an 8th of (potential) physical memory
	* size, unless size has been set by kernel command line parameter.
	*/
	static void setup_vmalloc_size(void)
	{
	unsigned long size;

	if (vmalloc_size_set)
	return;
	size = round_up(ident_map_size / 8, _SEGMENT_SIZE);
	vmalloc_size = max(size, vmalloc_size);
	}

	static void offset_vmlinux_info(unsigned long offset)
	{
	vmlinux.default_lma += offset;
	(unsigned long )(&vmlinux.entry) += offset;
	vmlinux.bootdata_off += offset;
	vmlinux.bootdata_preserved_off += offset;
	vmlinux.rela_dyn_start += offset;
	vmlinux.rela_dyn_end += offset;
	vmlinux.dynsym_start += offset;
	}

	static unsigned long reserve_amode31(unsigned long safe_addr)
	{
	__amode31_base = PAGE_ALIGN(safe_addr);
	return safe_addr + vmlinux.amode31_size;
	}

	void startup_kernel(void)
	{
	unsigned long max_physmem_end;
	unsigned long random_lma;
	unsigned long safe_addr;
	void *img;

	initrd_data.start = parmarea.initrd_start;
	initrd_data.size = parmarea.initrd_size;
	oldmem_data.start = parmarea.oldmem_base;
	oldmem_data.size = parmarea.oldmem_size;

	setup_lpp();
	store_ipl_parmblock();
	safe_addr = mem_safe_offset();
	safe_addr = reserve_amode31(safe_addr);
	safe_addr = read_ipl_report(safe_addr);
	uv_query_info();
	safe_addr = rescue_initrd(safe_addr);
	sclp_early_read_info();
	setup_boot_command_line();
	parse_boot_command_line();
	sanitize_prot_virt_host();
	max_physmem_end = detect_memory(&safe_addr);
	setup_ident_map_size(max_physmem_end);
	setup_vmalloc_size();
	setup_kernel_memory_layout();

	if (IS_ENABLED(CONFIG_RANDOMIZE_BASE) && kaslr_enabled) {
	random_lma = get_random_base(safe_addr);
	if (random_lma) {
	__kaslr_offset = random_lma - vmlinux.default_lma;
	img = (void *)vmlinux.default_lma;
	offset_vmlinux_info(__kaslr_offset);
	}
	}

	if (!IS_ENABLED(CONFIG_KERNEL_UNCOMPRESSED)) {
	img = decompress_kernel();
	memmove((void *)vmlinux.default_lma, img, vmlinux.image_size);
	} else if (__kaslr_offset)
	memcpy((void *)vmlinux.default_lma, img, vmlinux.image_size);

	clear_bss_section();
	copy_bootdata();
	handle_relocs(__kaslr_offset);

	if (__kaslr_offset) {
	/*
	* Save KASLR offset for early dumps, before vmcore_info is set.
	* Mark as uneven to distinguish from real vmcore_info pointer.
	*/
	S390_lowcore.vmcore_info = __kaslr_offset \| 0x1UL;
	/* Clear non-relocated kernel */
	if (IS_ENABLED(CONFIG_KERNEL_UNCOMPRESSED))
	memset(img, 0, vmlinux.image_size);
	}
	vmlinux.entry();
	}