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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
commitace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch)
treeb2d64bc10158fdd5497876388cd68142ca374ed3 /arch/s390/boot
parentInitial commit. (diff)
downloadlinux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz
linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r--arch/s390/boot/.gitignore7
-rw-r--r--arch/s390/boot/Makefile133
-rw-r--r--arch/s390/boot/als.c114
-rw-r--r--arch/s390/boot/boot.h102
-rw-r--r--arch/s390/boot/clz_ctz.c2
-rw-r--r--arch/s390/boot/cmdline.c2
-rw-r--r--arch/s390/boot/ctype.c2
-rw-r--r--arch/s390/boot/decompressor.c86
-rw-r--r--arch/s390/boot/decompressor.h12
-rw-r--r--arch/s390/boot/ebcdic.c2
-rw-r--r--arch/s390/boot/head.S320
-rw-r--r--arch/s390/boot/head_kdump.S101
-rwxr-xr-xarch/s390/boot/install.sh24
-rw-r--r--arch/s390/boot/ipl_data.c84
-rw-r--r--arch/s390/boot/ipl_parm.c306
-rw-r--r--arch/s390/boot/ipl_report.c165
-rw-r--r--arch/s390/boot/ipl_vmparm.c2
-rw-r--r--arch/s390/boot/kaslr.c198
-rw-r--r--arch/s390/boot/machine_kexec_reloc.c2
-rw-r--r--arch/s390/boot/mem.S2
-rw-r--r--arch/s390/boot/pgm_check_info.c179
-rw-r--r--arch/s390/boot/physmem_info.c328
-rw-r--r--arch/s390/boot/sclp_early_core.c11
-rw-r--r--arch/s390/boot/startup.c378
-rw-r--r--arch/s390/boot/string.c140
-rw-r--r--arch/s390/boot/uv.c95
-rw-r--r--arch/s390/boot/uv.h22
-rw-r--r--arch/s390/boot/version.c8
-rw-r--r--arch/s390/boot/vmem.c458
-rw-r--r--arch/s390/boot/vmlinux.lds.S128
30 files changed, 3413 insertions, 0 deletions
diff --git a/arch/s390/boot/.gitignore b/arch/s390/boot/.gitignore
new file mode 100644
index 0000000000..f56591bc08
--- /dev/null
+++ b/arch/s390/boot/.gitignore
@@ -0,0 +1,7 @@
+# SPDX-License-Identifier: GPL-2.0-only
+image
+bzImage
+section_cmp.*
+vmlinux
+vmlinux.lds
+vmlinux.syms
diff --git a/arch/s390/boot/Makefile b/arch/s390/boot/Makefile
new file mode 100644
index 0000000000..c7c81e5f92
--- /dev/null
+++ b/arch/s390/boot/Makefile
@@ -0,0 +1,133 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Makefile for the linux s390-specific parts of the memory manager.
+#
+
+KCOV_INSTRUMENT := n
+GCOV_PROFILE := n
+UBSAN_SANITIZE := n
+KASAN_SANITIZE := n
+KCSAN_SANITIZE := n
+
+KBUILD_AFLAGS := $(KBUILD_AFLAGS_DECOMPRESSOR)
+KBUILD_CFLAGS := $(KBUILD_CFLAGS_DECOMPRESSOR)
+
+#
+# Use minimum architecture for als.c to be able to print an error
+# message if the kernel is started on a machine which is too old
+#
+ifndef CONFIG_CC_IS_CLANG
+CC_FLAGS_MARCH_MINIMUM := -march=z900
+else
+CC_FLAGS_MARCH_MINIMUM := -march=z10
+endif
+
+ifneq ($(CC_FLAGS_MARCH),$(CC_FLAGS_MARCH_MINIMUM))
+AFLAGS_REMOVE_head.o += $(CC_FLAGS_MARCH)
+AFLAGS_head.o += $(CC_FLAGS_MARCH_MINIMUM)
+AFLAGS_REMOVE_mem.o += $(CC_FLAGS_MARCH)
+AFLAGS_mem.o += $(CC_FLAGS_MARCH_MINIMUM)
+CFLAGS_REMOVE_als.o += $(CC_FLAGS_MARCH)
+CFLAGS_als.o += $(CC_FLAGS_MARCH_MINIMUM)
+CFLAGS_REMOVE_sclp_early_core.o += $(CC_FLAGS_MARCH)
+CFLAGS_sclp_early_core.o += $(CC_FLAGS_MARCH_MINIMUM)
+endif
+
+CFLAGS_sclp_early_core.o += -I$(srctree)/drivers/s390/char
+
+obj-y := head.o als.o startup.o physmem_info.o ipl_parm.o ipl_report.o vmem.o
+obj-y += string.o ebcdic.o sclp_early_core.o mem.o ipl_vmparm.o cmdline.o
+obj-y += version.o pgm_check_info.o ctype.o ipl_data.o machine_kexec_reloc.o
+obj-$(findstring y, $(CONFIG_PROTECTED_VIRTUALIZATION_GUEST) $(CONFIG_PGSTE)) += uv.o
+obj-$(CONFIG_RANDOMIZE_BASE) += kaslr.o
+obj-y += $(if $(CONFIG_KERNEL_UNCOMPRESSED),,decompressor.o) info.o
+obj-$(CONFIG_KERNEL_ZSTD) += clz_ctz.o
+obj-all := $(obj-y) piggy.o syms.o
+
+targets := bzImage section_cmp.boot.data section_cmp.boot.preserved.data $(obj-y)
+targets += vmlinux.lds vmlinux vmlinux.bin vmlinux.bin.gz vmlinux.bin.bz2
+targets += vmlinux.bin.xz vmlinux.bin.lzma vmlinux.bin.lzo vmlinux.bin.lz4
+targets += vmlinux.bin.zst info.bin syms.bin vmlinux.syms $(obj-all)
+
+OBJECTS := $(addprefix $(obj)/,$(obj-y))
+OBJECTS_ALL := $(addprefix $(obj)/,$(obj-all))
+
+clean-files += vmlinux.map
+
+quiet_cmd_section_cmp = SECTCMP $*
+define cmd_section_cmp
+ s1=`$(OBJDUMP) -t -j "$*" "$<" | sort | \
+ sed -n "/0000000000000000/! s/.*\s$*\s\+//p" | sha256sum`; \
+ s2=`$(OBJDUMP) -t -j "$*" "$(word 2,$^)" | sort | \
+ sed -n "/0000000000000000/! s/.*\s$*\s\+//p" | sha256sum`; \
+ if [ "$$s1" != "$$s2" ]; then \
+ echo "error: section $* differs between $< and $(word 2,$^)" >&2; \
+ exit 1; \
+ fi; \
+ touch $@
+endef
+
+$(obj)/bzImage: $(obj)/vmlinux $(obj)/section_cmp.boot.data $(obj)/section_cmp.boot.preserved.data FORCE
+ $(call if_changed,objcopy)
+
+$(obj)/section_cmp%: vmlinux $(obj)/vmlinux FORCE
+ $(call if_changed,section_cmp)
+
+LDFLAGS_vmlinux := --oformat $(LD_BFD) -e startup $(if $(CONFIG_VMLINUX_MAP),-Map=$(obj)/vmlinux.map) --build-id=sha1 -T
+$(obj)/vmlinux: $(obj)/vmlinux.lds $(OBJECTS_ALL) FORCE
+ $(call if_changed,ld)
+
+LDFLAGS_vmlinux.syms := --oformat $(LD_BFD) -e startup -T
+$(obj)/vmlinux.syms: $(obj)/vmlinux.lds $(OBJECTS) FORCE
+ $(call if_changed,ld)
+
+quiet_cmd_dumpsyms = DUMPSYMS $<
+define cmd_dumpsyms
+ $(NM) -n -S --format=bsd "$<" | sed -nE 's/^0*([0-9a-fA-F]+) 0*([0-9a-fA-F]+) [tT] ([^ ]*)$$/\1 \2 \3/p' | tr '\n' '\0' > "$@"
+endef
+
+$(obj)/syms.bin: $(obj)/vmlinux.syms FORCE
+ $(call if_changed,dumpsyms)
+
+OBJCOPYFLAGS_syms.o := -I binary -O elf64-s390 -B s390:64-bit --rename-section .data=.decompressor.syms
+$(obj)/syms.o: $(obj)/syms.bin FORCE
+ $(call if_changed,objcopy)
+
+OBJCOPYFLAGS_info.bin := -O binary --only-section=.vmlinux.info --set-section-flags .vmlinux.info=load
+$(obj)/info.bin: vmlinux FORCE
+ $(call if_changed,objcopy)
+
+OBJCOPYFLAGS_info.o := -I binary -O elf64-s390 -B s390:64-bit --rename-section .data=.vmlinux.info
+$(obj)/info.o: $(obj)/info.bin FORCE
+ $(call if_changed,objcopy)
+
+OBJCOPYFLAGS_vmlinux.bin := -O binary --remove-section=.comment --remove-section=.vmlinux.info -S
+$(obj)/vmlinux.bin: vmlinux FORCE
+ $(call if_changed,objcopy)
+
+suffix-$(CONFIG_KERNEL_GZIP) := .gz
+suffix-$(CONFIG_KERNEL_BZIP2) := .bz2
+suffix-$(CONFIG_KERNEL_LZ4) := .lz4
+suffix-$(CONFIG_KERNEL_LZMA) := .lzma
+suffix-$(CONFIG_KERNEL_LZO) := .lzo
+suffix-$(CONFIG_KERNEL_XZ) := .xz
+suffix-$(CONFIG_KERNEL_ZSTD) := .zst
+
+$(obj)/vmlinux.bin.gz: $(obj)/vmlinux.bin FORCE
+ $(call if_changed,gzip)
+$(obj)/vmlinux.bin.bz2: $(obj)/vmlinux.bin FORCE
+ $(call if_changed,bzip2_with_size)
+$(obj)/vmlinux.bin.lz4: $(obj)/vmlinux.bin FORCE
+ $(call if_changed,lz4_with_size)
+$(obj)/vmlinux.bin.lzma: $(obj)/vmlinux.bin FORCE
+ $(call if_changed,lzma_with_size)
+$(obj)/vmlinux.bin.lzo: $(obj)/vmlinux.bin FORCE
+ $(call if_changed,lzo_with_size)
+$(obj)/vmlinux.bin.xz: $(obj)/vmlinux.bin FORCE
+ $(call if_changed,xzkern_with_size)
+$(obj)/vmlinux.bin.zst: $(obj)/vmlinux.bin FORCE
+ $(call if_changed,zstd22_with_size)
+
+OBJCOPYFLAGS_piggy.o := -I binary -O elf64-s390 -B s390:64-bit --rename-section .data=.vmlinux.bin.compressed
+$(obj)/piggy.o: $(obj)/vmlinux.bin$(suffix-y) FORCE
+ $(call if_changed,objcopy)
diff --git a/arch/s390/boot/als.c b/arch/s390/boot/als.c
new file mode 100644
index 0000000000..47c48fbfb5
--- /dev/null
+++ b/arch/s390/boot/als.c
@@ -0,0 +1,114 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright IBM Corp. 2016
+ */
+#include <linux/kernel.h>
+#include <asm/processor.h>
+#include <asm/facility.h>
+#include <asm/lowcore.h>
+#include <asm/sclp.h>
+#include "boot.h"
+
+/*
+ * The code within this file will be called very early. It may _not_
+ * access anything within the bss section, since that is not cleared
+ * yet and may contain data (e.g. initrd) that must be saved by other
+ * code.
+ * For temporary objects the stack (16k) should be used.
+ */
+
+static unsigned long als[] = { FACILITIES_ALS };
+
+static void u16_to_hex(char *str, u16 val)
+{
+ int i, num;
+
+ for (i = 1; i <= 4; i++) {
+ num = (val >> (16 - 4 * i)) & 0xf;
+ if (num >= 10)
+ num += 7;
+ *str++ = '0' + num;
+ }
+ *str = '\0';
+}
+
+static void print_machine_type(void)
+{
+ static char mach_str[80] = "Detected machine-type number: ";
+ char type_str[5];
+ struct cpuid id;
+
+ get_cpu_id(&id);
+ u16_to_hex(type_str, id.machine);
+ strcat(mach_str, type_str);
+ strcat(mach_str, "\n");
+ sclp_early_printk(mach_str);
+}
+
+static void u16_to_decimal(char *str, u16 val)
+{
+ int div = 1;
+
+ while (div * 10 <= val)
+ div *= 10;
+ while (div) {
+ *str++ = '0' + val / div;
+ val %= div;
+ div /= 10;
+ }
+ *str = '\0';
+}
+
+void print_missing_facilities(void)
+{
+ static char als_str[80] = "Missing facilities: ";
+ unsigned long val;
+ char val_str[6];
+ int i, j, first;
+
+ first = 1;
+ for (i = 0; i < ARRAY_SIZE(als); i++) {
+ val = ~stfle_fac_list[i] & als[i];
+ for (j = 0; j < BITS_PER_LONG; j++) {
+ if (!(val & (1UL << (BITS_PER_LONG - 1 - j))))
+ continue;
+ if (!first)
+ strcat(als_str, ",");
+ /*
+ * Make sure we stay within one line. Consider that
+ * each facility bit adds up to five characters and
+ * z/VM adds a four character prefix.
+ */
+ if (strlen(als_str) > 70) {
+ strcat(als_str, "\n");
+ sclp_early_printk(als_str);
+ *als_str = '\0';
+ }
+ u16_to_decimal(val_str, i * BITS_PER_LONG + j);
+ strcat(als_str, val_str);
+ first = 0;
+ }
+ }
+ strcat(als_str, "\n");
+ sclp_early_printk(als_str);
+}
+
+static void facility_mismatch(void)
+{
+ sclp_early_printk("The Linux kernel requires more recent processor hardware\n");
+ print_machine_type();
+ print_missing_facilities();
+ sclp_early_printk("See Principles of Operations for facility bits\n");
+ disabled_wait();
+}
+
+void verify_facilities(void)
+{
+ int i;
+
+ __stfle(stfle_fac_list, ARRAY_SIZE(stfle_fac_list));
+ for (i = 0; i < ARRAY_SIZE(als); i++) {
+ if ((stfle_fac_list[i] & als[i]) != als[i])
+ facility_mismatch();
+ }
+}
diff --git a/arch/s390/boot/boot.h b/arch/s390/boot/boot.h
new file mode 100644
index 0000000000..222c6886ac
--- /dev/null
+++ b/arch/s390/boot/boot.h
@@ -0,0 +1,102 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef BOOT_BOOT_H
+#define BOOT_BOOT_H
+
+#include <linux/types.h>
+
+#define IPL_START 0x200
+
+#ifndef __ASSEMBLY__
+
+#include <asm/physmem_info.h>
+
+struct machine_info {
+ unsigned char has_edat1 : 1;
+ unsigned char has_edat2 : 1;
+ unsigned char has_nx : 1;
+};
+
+struct vmlinux_info {
+ unsigned long default_lma;
+ unsigned long entry;
+ unsigned long image_size; /* does not include .bss */
+ unsigned long bss_size; /* uncompressed image .bss size */
+ unsigned long bootdata_off;
+ unsigned long bootdata_size;
+ unsigned long bootdata_preserved_off;
+ unsigned long bootdata_preserved_size;
+ unsigned long dynsym_start;
+ unsigned long rela_dyn_start;
+ unsigned long rela_dyn_end;
+ unsigned long amode31_size;
+ unsigned long init_mm_off;
+ unsigned long swapper_pg_dir_off;
+ unsigned long invalid_pg_dir_off;
+#ifdef CONFIG_KASAN
+ unsigned long kasan_early_shadow_page_off;
+ unsigned long kasan_early_shadow_pte_off;
+ unsigned long kasan_early_shadow_pmd_off;
+ unsigned long kasan_early_shadow_pud_off;
+ unsigned long kasan_early_shadow_p4d_off;
+#endif
+};
+
+void startup_kernel(void);
+unsigned long detect_max_physmem_end(void);
+void detect_physmem_online_ranges(unsigned long max_physmem_end);
+void physmem_set_usable_limit(unsigned long limit);
+void physmem_reserve(enum reserved_range_type type, unsigned long addr, unsigned long size);
+void physmem_free(enum reserved_range_type type);
+/* for continuous/multiple allocations per type */
+unsigned long physmem_alloc_top_down(enum reserved_range_type type, unsigned long size,
+ unsigned long align);
+/* for single allocations, 1 per type */
+unsigned long physmem_alloc_range(enum reserved_range_type type, unsigned long size,
+ unsigned long align, unsigned long min, unsigned long max,
+ bool die_on_oom);
+unsigned long get_physmem_alloc_pos(void);
+bool ipl_report_certs_intersects(unsigned long addr, unsigned long size,
+ unsigned long *intersection_start);
+bool is_ipl_block_dump(void);
+void store_ipl_parmblock(void);
+int read_ipl_report(void);
+void save_ipl_cert_comp_list(void);
+void setup_boot_command_line(void);
+void parse_boot_command_line(void);
+void verify_facilities(void);
+void print_missing_facilities(void);
+void sclp_early_setup_buffer(void);
+void print_pgm_check_info(void);
+unsigned long randomize_within_range(unsigned long size, unsigned long align,
+ unsigned long min, unsigned long max);
+void setup_vmem(unsigned long asce_limit);
+void __printf(1, 2) decompressor_printk(const char *fmt, ...);
+void print_stacktrace(unsigned long sp);
+void error(char *m);
+
+extern struct machine_info machine;
+
+/* Symbols defined by linker scripts */
+extern const char kernel_version[];
+extern unsigned long memory_limit;
+extern unsigned long vmalloc_size;
+extern int vmalloc_size_set;
+extern char __boot_data_start[], __boot_data_end[];
+extern char __boot_data_preserved_start[], __boot_data_preserved_end[];
+extern char _decompressor_syms_start[], _decompressor_syms_end[];
+extern char _stack_start[], _stack_end[];
+extern char _end[], _decompressor_end[];
+extern unsigned char _compressed_start[];
+extern unsigned char _compressed_end[];
+extern struct vmlinux_info _vmlinux_info;
+#define vmlinux _vmlinux_info
+
+#define __abs_lowcore_pa(x) (((unsigned long)(x) - __abs_lowcore) % sizeof(struct lowcore))
+
+static inline bool intersects(unsigned long addr0, unsigned long size0,
+ unsigned long addr1, unsigned long size1)
+{
+ return addr0 + size0 > addr1 && addr1 + size1 > addr0;
+}
+#endif /* __ASSEMBLY__ */
+#endif /* BOOT_BOOT_H */
diff --git a/arch/s390/boot/clz_ctz.c b/arch/s390/boot/clz_ctz.c
new file mode 100644
index 0000000000..c3ebf24859
--- /dev/null
+++ b/arch/s390/boot/clz_ctz.c
@@ -0,0 +1,2 @@
+// SPDX-License-Identifier: GPL-2.0
+#include "../../../../lib/clz_ctz.c"
diff --git a/arch/s390/boot/cmdline.c b/arch/s390/boot/cmdline.c
new file mode 100644
index 0000000000..73d826cdbd
--- /dev/null
+++ b/arch/s390/boot/cmdline.c
@@ -0,0 +1,2 @@
+// SPDX-License-Identifier: GPL-2.0
+#include "../../../lib/cmdline.c"
diff --git a/arch/s390/boot/ctype.c b/arch/s390/boot/ctype.c
new file mode 100644
index 0000000000..2495810b47
--- /dev/null
+++ b/arch/s390/boot/ctype.c
@@ -0,0 +1,2 @@
+// SPDX-License-Identifier: GPL-2.0
+#include "../../../lib/ctype.c"
diff --git a/arch/s390/boot/decompressor.c b/arch/s390/boot/decompressor.c
new file mode 100644
index 0000000000..d762733a07
--- /dev/null
+++ b/arch/s390/boot/decompressor.c
@@ -0,0 +1,86 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Definitions and wrapper functions for kernel decompressor
+ *
+ * Copyright IBM Corp. 2010
+ *
+ * Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>
+ */
+
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <asm/page.h>
+#include "decompressor.h"
+#include "boot.h"
+
+/*
+ * gzip declarations
+ */
+#define STATIC static
+
+#undef memset
+#undef memcpy
+#undef memmove
+#define memmove memmove
+#define memzero(s, n) memset((s), 0, (n))
+
+#if defined(CONFIG_KERNEL_BZIP2)
+#define BOOT_HEAP_SIZE 0x400000
+#elif defined(CONFIG_KERNEL_ZSTD)
+#define BOOT_HEAP_SIZE 0x30000
+#else
+#define BOOT_HEAP_SIZE 0x10000
+#endif
+
+static unsigned long free_mem_ptr = (unsigned long) _end;
+static unsigned long free_mem_end_ptr = (unsigned long) _end + BOOT_HEAP_SIZE;
+
+#ifdef CONFIG_KERNEL_GZIP
+#include "../../../../lib/decompress_inflate.c"
+#endif
+
+#ifdef CONFIG_KERNEL_BZIP2
+#include "../../../../lib/decompress_bunzip2.c"
+#endif
+
+#ifdef CONFIG_KERNEL_LZ4
+#include "../../../../lib/decompress_unlz4.c"
+#endif
+
+#ifdef CONFIG_KERNEL_LZMA
+#include "../../../../lib/decompress_unlzma.c"
+#endif
+
+#ifdef CONFIG_KERNEL_LZO
+#include "../../../../lib/decompress_unlzo.c"
+#endif
+
+#ifdef CONFIG_KERNEL_XZ
+#include "../../../../lib/decompress_unxz.c"
+#endif
+
+#ifdef CONFIG_KERNEL_ZSTD
+#include "../../../../lib/decompress_unzstd.c"
+#endif
+
+#define decompress_offset ALIGN((unsigned long)_end + BOOT_HEAP_SIZE, PAGE_SIZE)
+
+unsigned long mem_safe_offset(void)
+{
+ /*
+ * due to 4MB HEAD_SIZE for bzip2
+ * 'decompress_offset + vmlinux.image_size' could be larger than
+ * kernel at final position + its .bss, so take the larger of two
+ */
+ return max(decompress_offset + vmlinux.image_size,
+ vmlinux.default_lma + vmlinux.image_size + vmlinux.bss_size);
+}
+
+void *decompress_kernel(void)
+{
+ void *output = (void *)decompress_offset;
+
+ __decompress(_compressed_start, _compressed_end - _compressed_start,
+ NULL, NULL, output, vmlinux.image_size, NULL, error);
+ return output;
+}
diff --git a/arch/s390/boot/decompressor.h b/arch/s390/boot/decompressor.h
new file mode 100644
index 0000000000..92b81d2ea3
--- /dev/null
+++ b/arch/s390/boot/decompressor.h
@@ -0,0 +1,12 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef BOOT_COMPRESSED_DECOMPRESSOR_H
+#define BOOT_COMPRESSED_DECOMPRESSOR_H
+
+#ifdef CONFIG_KERNEL_UNCOMPRESSED
+static inline void *decompress_kernel(void) { return NULL; }
+#else
+void *decompress_kernel(void);
+#endif
+unsigned long mem_safe_offset(void);
+
+#endif /* BOOT_COMPRESSED_DECOMPRESSOR_H */
diff --git a/arch/s390/boot/ebcdic.c b/arch/s390/boot/ebcdic.c
new file mode 100644
index 0000000000..7391e7d360
--- /dev/null
+++ b/arch/s390/boot/ebcdic.c
@@ -0,0 +1,2 @@
+// SPDX-License-Identifier: GPL-2.0
+#include "../kernel/ebcdic.c"
diff --git a/arch/s390/boot/head.S b/arch/s390/boot/head.S
new file mode 100644
index 0000000000..637c29c3f6
--- /dev/null
+++ b/arch/s390/boot/head.S
@@ -0,0 +1,320 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright IBM Corp. 1999, 2010
+ *
+ * Author(s): Hartmut Penner <hp@de.ibm.com>
+ * Martin Schwidefsky <schwidefsky@de.ibm.com>
+ * Rob van der Heij <rvdhei@iae.nl>
+ *
+ * There are 5 different IPL methods
+ * 1) load the image directly into ram at address 0 and do an PSW restart
+ * 2) linload will load the image from address 0x10000 to memory 0x10000
+ * and start the code thru LPSW 0x0008000080010000 (VM only, deprecated)
+ * 3) generate the tape ipl header, store the generated image on a tape
+ * and ipl from it
+ * In case of SL tape you need to IPL 5 times to get past VOL1 etc
+ * 4) generate the vm reader ipl header, move the generated image to the
+ * VM reader (use option NOH!) and do a ipl from reader (VM only)
+ * 5) direct call of start by the SALIPL loader
+ * We use the cpuid to distinguish between VM and native ipl
+ * params for kernel are pushed to 0x10400 (see setup.h)
+ *
+ */
+
+#include <linux/init.h>
+#include <linux/linkage.h>
+#include <asm/asm-offsets.h>
+#include <asm/page.h>
+#include <asm/ptrace.h>
+#include <asm/sclp.h>
+#include "boot.h"
+
+#define EP_OFFSET 0x10008
+#define EP_STRING "S390EP"
+#define IPL_BS 0x730
+
+__HEAD
+ipl_start:
+ mvi __LC_AR_MODE_ID,1 # set esame flag
+ slr %r0,%r0 # set cpuid to zero
+ lhi %r1,2 # mode 2 = esame (dump)
+ sigp %r1,%r0,0x12 # switch to esame mode
+ sam64 # switch to 64 bit addressing mode
+ lgh %r1,__LC_SUBCHANNEL_ID # test if subchannel number
+ brctg %r1,.Lnoload # is valid
+ llgf %r1,__LC_SUBCHANNEL_ID # load ipl subchannel number
+ lghi %r2,IPL_BS # load start address
+ bras %r14,.Lloader # load rest of ipl image
+ larl %r12,parmarea # pointer to parameter area
+ stg %r1,IPL_DEVICE-PARMAREA(%r12) # save ipl device number
+#
+# load parameter file from ipl device
+#
+.Lagain1:
+ larl %r2,_end # ramdisk loc. is temp
+ bras %r14,.Lloader # load parameter file
+ ltgr %r2,%r2 # got anything ?
+ jz .Lnopf
+ lg %r3,MAX_COMMAND_LINE_SIZE-PARMAREA(%r12)
+ aghi %r3,-1
+ clgr %r2,%r3
+ jl .Lnotrunc
+ lgr %r2,%r3
+.Lnotrunc:
+ larl %r4,_end
+ larl %r13,.L_hdr
+ clc 0(3,%r4),0(%r13) # if it is HDRx
+ jz .Lagain1 # skip dataset header
+ larl %r13,.L_eof
+ clc 0(3,%r4),0(%r13) # if it is EOFx
+ jz .Lagain1 # skip data set trailer
+ lgr %r5,%r2
+ la %r6,COMMAND_LINE-PARMAREA(%r12)
+ lgr %r7,%r2
+ aghi %r7,1
+ mvcl %r6,%r4
+.Lnopf:
+#
+# load ramdisk from ipl device
+#
+.Lagain2:
+ larl %r2,_end # addr of ramdisk
+ stg %r2,INITRD_START-PARMAREA(%r12)
+ bras %r14,.Lloader # load ramdisk
+ stg %r2,INITRD_SIZE-PARMAREA(%r12) # store size of rd
+ ltgr %r2,%r2
+ jnz .Lrdcont
+ stg %r2,INITRD_START-PARMAREA(%r12) # no ramdisk found
+.Lrdcont:
+ larl %r2,_end
+ larl %r13,.L_hdr # skip HDRx and EOFx
+ clc 0(3,%r2),0(%r13)
+ jz .Lagain2
+ larl %r13,.L_eof
+ clc 0(3,%r2),0(%r13)
+ jz .Lagain2
+#
+# reset files in VM reader
+#
+ larl %r13,.Lcpuid
+ stidp 0(%r13) # store cpuid
+ tm 0(%r13),0xff # running VM ?
+ jno .Lnoreset
+ larl %r2,.Lreset
+ lghi %r3,26
+ diag %r2,%r3,8
+ larl %r5,.Lirb
+ stsch 0(%r5) # check if irq is pending
+ tm 30(%r5),0x0f # by verifying if any of the
+ jnz .Lwaitforirq # activity or status control
+ tm 31(%r5),0xff # bits is set in the schib
+ jz .Lnoreset
+.Lwaitforirq:
+ bras %r14,.Lirqwait # wait for IO interrupt
+ c %r1,__LC_SUBCHANNEL_ID # compare subchannel number
+ jne .Lwaitforirq
+ larl %r5,.Lirb
+ tsch 0(%r5)
+.Lnoreset:
+ j .Lnoload
+#
+# everything loaded, go for it
+#
+.Lnoload:
+ jg startup
+#
+# subroutine to wait for end I/O
+#
+.Lirqwait:
+ larl %r13,.Lnewpswmask # set up IO interrupt psw
+ mvc __LC_IO_NEW_PSW(8),0(%r13)
+ stg %r14,__LC_IO_NEW_PSW+8
+ larl %r13,.Lwaitpsw
+ lpswe 0(%r13)
+.Lioint:
+#
+# subroutine for loading cards from the reader
+#
+.Lloader:
+ lgr %r4,%r14
+ larl %r3,.Lorb # r2 = address of orb into r2
+ larl %r5,.Lirb # r4 = address of irb
+ larl %r6,.Lccws
+ lghi %r7,20
+.Linit:
+ st %r2,4(%r6) # initialize CCW data addresses
+ la %r2,0x50(%r2)
+ la %r6,8(%r6)
+ brctg %r7,.Linit
+ larl %r13,.Lcr6
+ lctlg %c6,%c6,0(%r13)
+ xgr %r2,%r2
+.Lldlp:
+ ssch 0(%r3) # load chunk of 1600 bytes
+ jnz .Llderr
+.Lwait4irq:
+ bras %r14,.Lirqwait
+ c %r1,__LC_SUBCHANNEL_ID # compare subchannel number
+ jne .Lwait4irq
+ tsch 0(%r5)
+ xgr %r0,%r0
+ ic %r0,8(%r5) # get device status
+ cghi %r0,8 # channel end ?
+ je .Lcont
+ cghi %r0,12 # channel end + device end ?
+ je .Lcont
+ llgf %r0,4(%r5)
+ sgf %r0,8(%r3) # r0/8 = number of ccws executed
+ mghi %r0,10 # *10 = number of bytes in ccws
+ llgh %r3,10(%r5) # get residual count
+ sgr %r0,%r3 # #ccws*80-residual=#bytes read
+ agr %r2,%r0
+ br %r4 # r2 contains the total size
+.Lcont:
+ aghi %r2,0x640 # add 0x640 to total size
+ larl %r6,.Lccws
+ lghi %r7,20
+.Lincr:
+ l %r0,4(%r6) # update CCW data addresses
+ aghi %r0,0x640
+ st %r0,4(%r6)
+ aghi %r6,8
+ brctg %r7,.Lincr
+ j .Lldlp
+.Llderr:
+ larl %r13,.Lcrash
+ lpsw 0(%r13)
+
+ .balign 8
+.Lwaitpsw:
+ .quad 0x0202000180000000,.Lioint
+.Lnewpswmask:
+ .quad 0x0000000180000000
+ .balign 8
+.Lorb: .long 0x00000000,0x0080ff00,.Lccws
+.Lirb: .long 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
+ .balign 8
+.Lcr6: .quad 0x00000000ff000000
+ .balign 8
+.Lcrash:.long 0x000a0000,0x00000000
+ .balign 8
+.Lccws: .rept 19
+ .long 0x02600050,0x00000000
+ .endr
+ .long 0x02200050,0x00000000
+.Lreset:.byte 0xc3,0xc8,0xc1,0xd5,0xc7,0xc5,0x40,0xd9,0xc4,0xd9,0x40
+ .byte 0xc1,0xd3,0xd3,0x40,0xd2,0xc5,0xc5,0xd7,0x40,0xd5,0xd6
+ .byte 0xc8,0xd6,0xd3,0xc4 # "change rdr all keep nohold"
+.L_eof: .long 0xc5d6c600 /* C'EOF' */
+.L_hdr: .long 0xc8c4d900 /* C'HDR' */
+ .balign 8
+.Lcpuid:.fill 8,1,0
+
+#
+# normal startup-code, running in absolute addressing mode
+# this is called either by the ipl loader or directly by PSW restart
+# or linload or SALIPL
+#
+ .org STARTUP_NORMAL_OFFSET - IPL_START
+SYM_CODE_START(startup)
+ j startup_normal
+ .org EP_OFFSET - IPL_START
+#
+# This is a list of s390 kernel entry points. At address 0x1000f the number of
+# valid entry points is stored.
+#
+# IMPORTANT: Do not change this table, it is s390 kernel ABI!
+#
+ .ascii EP_STRING
+ .byte 0x00,0x01
+#
+# kdump startup-code, running in 64 bit absolute addressing mode
+#
+ .org STARTUP_KDUMP_OFFSET - IPL_START
+ j startup_kdump
+SYM_CODE_END(startup)
+SYM_CODE_START_LOCAL(startup_normal)
+ mvi __LC_AR_MODE_ID,1 # set esame flag
+ slr %r0,%r0 # set cpuid to zero
+ lhi %r1,2 # mode 2 = esame (dump)
+ sigp %r1,%r0,0x12 # switch to esame mode
+ bras %r13,0f
+ .fill 16,4,0x0
+0: lmh %r0,%r15,0(%r13) # clear high-order half of gprs
+ sam64 # switch to 64 bit addressing mode
+ larl %r13,.Lext_new_psw
+ mvc __LC_EXT_NEW_PSW(16),0(%r13)
+ larl %r13,.Lpgm_new_psw
+ mvc __LC_PGM_NEW_PSW(16),0(%r13)
+ larl %r13,.Lio_new_psw
+ mvc __LC_IO_NEW_PSW(16),0(%r13)
+ xc 0x200(256),0x200 # partially clear lowcore
+ xc 0x300(256),0x300
+ xc 0xe00(256),0xe00
+ xc 0xf00(256),0xf00
+ larl %r13,.Lctl
+ lctlg %c0,%c15,0(%r13) # load control registers
+ stcke __LC_BOOT_CLOCK
+ mvc __LC_LAST_UPDATE_CLOCK(8),__LC_BOOT_CLOCK+1
+ larl %r13,6f
+ spt 0(%r13)
+ mvc __LC_LAST_UPDATE_TIMER(8),0(%r13)
+ larl %r15,_stack_end-STACK_FRAME_OVERHEAD
+ brasl %r14,sclp_early_setup_buffer
+ brasl %r14,verify_facilities
+ brasl %r14,startup_kernel
+SYM_CODE_END(startup_normal)
+
+ .balign 8
+6: .long 0x7fffffff,0xffffffff
+.Lext_new_psw:
+ .quad 0x0002000180000000,0x1b0 # disabled wait
+.Lpgm_new_psw:
+ .quad 0x0000000180000000,startup_pgm_check_handler
+.Lio_new_psw:
+ .quad 0x0002000180000000,0x1f0 # disabled wait
+.Lctl: .quad 0x04040000 # cr0: AFP registers & secondary space
+ .quad 0 # cr1: primary space segment table
+ .quad 0 # cr2: dispatchable unit control table
+ .quad 0 # cr3: instruction authorization
+ .quad 0xffff # cr4: instruction authorization
+ .quad 0 # cr5: primary-aste origin
+ .quad 0 # cr6: I/O interrupts
+ .quad 0 # cr7: secondary space segment table
+ .quad 0x0000000000008000 # cr8: access registers translation
+ .quad 0 # cr9: tracing off
+ .quad 0 # cr10: tracing off
+ .quad 0 # cr11: tracing off
+ .quad 0 # cr12: tracing off
+ .quad 0 # cr13: home space segment table
+ .quad 0xc0000000 # cr14: machine check handling off
+ .quad 0 # cr15: linkage stack operations
+
+#include "head_kdump.S"
+
+#
+# This program check is active immediately after kernel start
+# and until early_pgm_check_handler is set in kernel/early.c
+# It simply saves general/control registers and psw in
+# the save area and does disabled wait with a faulty address.
+#
+SYM_CODE_START_LOCAL(startup_pgm_check_handler)
+ stmg %r8,%r15,__LC_SAVE_AREA_SYNC
+ la %r8,4095
+ stctg %c0,%c15,__LC_CREGS_SAVE_AREA-4095(%r8)
+ stmg %r0,%r7,__LC_GPREGS_SAVE_AREA-4095(%r8)
+ mvc __LC_GPREGS_SAVE_AREA-4095+64(64,%r8),__LC_SAVE_AREA_SYNC
+ mvc __LC_PSW_SAVE_AREA-4095(16,%r8),__LC_PGM_OLD_PSW
+ mvc __LC_RETURN_PSW(16),__LC_PGM_OLD_PSW
+ ni __LC_RETURN_PSW,0xfc # remove IO and EX bits
+ ni __LC_RETURN_PSW+1,0xfb # remove MCHK bit
+ oi __LC_RETURN_PSW+1,0x2 # set wait state bit
+ larl %r9,.Lold_psw_disabled_wait
+ stg %r9,__LC_PGM_NEW_PSW+8
+ larl %r15,_dump_info_stack_end-STACK_FRAME_OVERHEAD
+ brasl %r14,print_pgm_check_info
+.Lold_psw_disabled_wait:
+ la %r8,4095
+ lmg %r0,%r15,__LC_GPREGS_SAVE_AREA-4095(%r8)
+ lpswe __LC_RETURN_PSW # disabled wait
+SYM_CODE_END(startup_pgm_check_handler)
diff --git a/arch/s390/boot/head_kdump.S b/arch/s390/boot/head_kdump.S
new file mode 100644
index 0000000000..f7107c7625
--- /dev/null
+++ b/arch/s390/boot/head_kdump.S
@@ -0,0 +1,101 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * S390 kdump lowlevel functions (new kernel)
+ *
+ * Copyright IBM Corp. 2011
+ * Author(s): Michael Holzheu <holzheu@linux.vnet.ibm.com>
+ */
+
+#include <asm/sigp.h>
+
+#define DATAMOVER_ADDR 0x4000
+#define COPY_PAGE_ADDR 0x6000
+
+#ifdef CONFIG_CRASH_DUMP
+
+#
+# kdump entry (new kernel - not yet relocated)
+#
+# Note: This code has to be position independent
+#
+
+SYM_CODE_START_LOCAL(startup_kdump)
+ lhi %r1,2 # mode 2 = esame (dump)
+ sigp %r1,%r0,SIGP_SET_ARCHITECTURE # Switch to esame mode
+ sam64 # Switch to 64 bit addressing
+ basr %r13,0
+.Lbase:
+ larl %r2,.Lbase_addr # Check, if we have been
+ lg %r2,0(%r2) # already relocated:
+ clgr %r2,%r13 #
+ jne .Lrelocate # No : Start data mover
+ lghi %r2,0 # Yes: Start kdump kernel
+ brasl %r14,startup_kdump_relocated
+
+.Lrelocate:
+ larl %r4,startup
+ lg %r2,0x418(%r4) # Get kdump base
+ lg %r3,0x420(%r4) # Get kdump size
+
+ larl %r10,.Lcopy_start # Source of data mover
+ lghi %r8,DATAMOVER_ADDR # Target of data mover
+ mvc 0(256,%r8),0(%r10) # Copy data mover code
+
+ agr %r8,%r2 # Copy data mover to
+ mvc 0(256,%r8),0(%r10) # reserved mem
+
+ lghi %r14,DATAMOVER_ADDR # Jump to copied data mover
+ basr %r14,%r14
+.Lbase_addr:
+ .quad .Lbase
+
+#
+# kdump data mover code (runs at address DATAMOVER_ADDR)
+#
+# r2: kdump base address
+# r3: kdump size
+#
+.Lcopy_start:
+ basr %r13,0 # Base
+0:
+ lgr %r11,%r2 # Save kdump base address
+ lgr %r12,%r2
+ agr %r12,%r3 # Compute kdump end address
+
+ lghi %r5,0
+ lghi %r10,COPY_PAGE_ADDR # Load copy page address
+1:
+ mvc 0(256,%r10),0(%r5) # Copy old kernel to tmp
+ mvc 0(256,%r5),0(%r11) # Copy new kernel to old
+ mvc 0(256,%r11),0(%r10) # Copy tmp to new
+ aghi %r11,256
+ aghi %r5,256
+ clgr %r11,%r12
+ jl 1b
+
+ lg %r14,.Lstartup_kdump-0b(%r13)
+ basr %r14,%r14 # Start relocated kernel
+.Lstartup_kdump:
+ .long 0x00000000,0x00000000 + startup_kdump_relocated
+.Lcopy_end:
+
+#
+# Startup of kdump (relocated new kernel)
+#
+ .balign 2
+startup_kdump_relocated:
+ basr %r13,0
+0: lpswe .Lrestart_psw-0b(%r13) # Start new kernel...
+SYM_CODE_END(startup_kdump)
+ .balign 8
+.Lrestart_psw:
+ .quad 0x0000000080000000,0x0000000000000000 + startup
+#else
+SYM_CODE_START_LOCAL(startup_kdump)
+ larl %r13,startup_kdump_crash
+ lpswe 0(%r13)
+SYM_CODE_END(startup_kdump)
+ .balign 8
+startup_kdump_crash:
+ .quad 0x0002000080000000,0x0000000000000000 + startup_kdump_crash
+#endif /* CONFIG_CRASH_DUMP */
diff --git a/arch/s390/boot/install.sh b/arch/s390/boot/install.sh
new file mode 100755
index 0000000000..a13dd2f2aa
--- /dev/null
+++ b/arch/s390/boot/install.sh
@@ -0,0 +1,24 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+#
+# arch/s390x/boot/install.sh
+#
+# Copyright (C) 1995 by Linus Torvalds
+#
+# Adapted from code in arch/i386/boot/Makefile by H. Peter Anvin
+#
+# "make install" script for s390 architecture
+#
+# Arguments:
+# $1 - kernel version
+# $2 - kernel image file
+# $3 - kernel map file
+# $4 - default install path (blank if root directory)
+
+echo "Warning: '${INSTALLKERNEL}' command not available - additional " \
+ "bootloader config required" >&2
+if [ -f "$4/vmlinuz-$1" ]; then mv -- "$4/vmlinuz-$1" "$4/vmlinuz-$1.old"; fi
+if [ -f "$4/System.map-$1" ]; then mv -- "$4/System.map-$1" "$4/System.map-$1.old"; fi
+
+cat -- "$2" > "$4/vmlinuz-$1"
+cp -- "$3" "$4/System.map-$1"
diff --git a/arch/s390/boot/ipl_data.c b/arch/s390/boot/ipl_data.c
new file mode 100644
index 0000000000..0846e2b249
--- /dev/null
+++ b/arch/s390/boot/ipl_data.c
@@ -0,0 +1,84 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include <linux/compat.h>
+#include <linux/ptrace.h>
+#include <asm/cio.h>
+#include <asm/asm-offsets.h>
+#include "boot.h"
+
+#define CCW0(cmd, addr, cnt, flg) \
+ { .cmd_code = cmd, .cda = addr, .count = cnt, .flags = flg, }
+
+#define PSW_MASK_DISABLED (PSW_MASK_WAIT | PSW_MASK_EA | PSW_MASK_BA)
+
+struct ipl_lowcore {
+ psw_t32 ipl_psw; /* 0x0000 */
+ struct ccw0 ccwpgm[2]; /* 0x0008 */
+ u8 fill[56]; /* 0x0018 */
+ struct ccw0 ccwpgmcc[20]; /* 0x0050 */
+ u8 pad_0xf0[0x01a0-0x00f0]; /* 0x00f0 */
+ psw_t restart_psw; /* 0x01a0 */
+ psw_t external_new_psw; /* 0x01b0 */
+ psw_t svc_new_psw; /* 0x01c0 */
+ psw_t program_new_psw; /* 0x01d0 */
+ psw_t mcck_new_psw; /* 0x01e0 */
+ psw_t io_new_psw; /* 0x01f0 */
+};
+
+/*
+ * Initial lowcore for IPL: the first 24 bytes are loaded by IPL to
+ * addresses 0-23 (a PSW and two CCWs). Bytes 24-79 are discarded.
+ * The next 160 bytes are loaded to addresses 0x18-0xb7. They form
+ * the continuation of the CCW program started by IPL and load the
+ * range 0x0f0-0x730 from the image to the range 0x0f0-0x730 in
+ * memory. At the end of the channel program the PSW at location 0 is
+ * loaded.
+ * Initial processing starts at 0x200 = iplstart.
+ *
+ * The restart psw points to iplstart which allows to load a kernel
+ * image into memory and starting it by a psw restart on any cpu. All
+ * other default psw new locations contain a disabled wait psw where
+ * the address indicates which psw was loaded.
+ *
+ * Note that the 'file' utility can detect s390 kernel images. For
+ * that to succeed the two initial CCWs, and the 0x40 fill bytes must
+ * be present.
+ */
+static struct ipl_lowcore ipl_lowcore __used __section(".ipldata") = {
+ .ipl_psw = { .mask = PSW32_MASK_BASE, .addr = PSW32_ADDR_AMODE | IPL_START },
+ .ccwpgm = {
+ [ 0] = CCW0(CCW_CMD_READ_IPL, 0x018, 0x50, CCW_FLAG_SLI | CCW_FLAG_CC),
+ [ 1] = CCW0(CCW_CMD_READ_IPL, 0x068, 0x50, CCW_FLAG_SLI | CCW_FLAG_CC),
+ },
+ .fill = {
+ [ 0 ... 55] = 0x40,
+ },
+ .ccwpgmcc = {
+ [ 0] = CCW0(CCW_CMD_READ_IPL, 0x0f0, 0x50, CCW_FLAG_SLI | CCW_FLAG_CC),
+ [ 1] = CCW0(CCW_CMD_READ_IPL, 0x140, 0x50, CCW_FLAG_SLI | CCW_FLAG_CC),
+ [ 2] = CCW0(CCW_CMD_READ_IPL, 0x190, 0x50, CCW_FLAG_SLI | CCW_FLAG_CC),
+ [ 3] = CCW0(CCW_CMD_READ_IPL, 0x1e0, 0x50, CCW_FLAG_SLI | CCW_FLAG_CC),
+ [ 4] = CCW0(CCW_CMD_READ_IPL, 0x230, 0x50, CCW_FLAG_SLI | CCW_FLAG_CC),
+ [ 5] = CCW0(CCW_CMD_READ_IPL, 0x280, 0x50, CCW_FLAG_SLI | CCW_FLAG_CC),
+ [ 6] = CCW0(CCW_CMD_READ_IPL, 0x2d0, 0x50, CCW_FLAG_SLI | CCW_FLAG_CC),
+ [ 7] = CCW0(CCW_CMD_READ_IPL, 0x320, 0x50, CCW_FLAG_SLI | CCW_FLAG_CC),
+ [ 8] = CCW0(CCW_CMD_READ_IPL, 0x370, 0x50, CCW_FLAG_SLI | CCW_FLAG_CC),
+ [ 9] = CCW0(CCW_CMD_READ_IPL, 0x3c0, 0x50, CCW_FLAG_SLI | CCW_FLAG_CC),
+ [10] = CCW0(CCW_CMD_READ_IPL, 0x410, 0x50, CCW_FLAG_SLI | CCW_FLAG_CC),
+ [11] = CCW0(CCW_CMD_READ_IPL, 0x460, 0x50, CCW_FLAG_SLI | CCW_FLAG_CC),
+ [12] = CCW0(CCW_CMD_READ_IPL, 0x4b0, 0x50, CCW_FLAG_SLI | CCW_FLAG_CC),
+ [13] = CCW0(CCW_CMD_READ_IPL, 0x500, 0x50, CCW_FLAG_SLI | CCW_FLAG_CC),
+ [14] = CCW0(CCW_CMD_READ_IPL, 0x550, 0x50, CCW_FLAG_SLI | CCW_FLAG_CC),
+ [15] = CCW0(CCW_CMD_READ_IPL, 0x5a0, 0x50, CCW_FLAG_SLI | CCW_FLAG_CC),
+ [16] = CCW0(CCW_CMD_READ_IPL, 0x5f0, 0x50, CCW_FLAG_SLI | CCW_FLAG_CC),
+ [17] = CCW0(CCW_CMD_READ_IPL, 0x640, 0x50, CCW_FLAG_SLI | CCW_FLAG_CC),
+ [18] = CCW0(CCW_CMD_READ_IPL, 0x690, 0x50, CCW_FLAG_SLI | CCW_FLAG_CC),
+ [19] = CCW0(CCW_CMD_READ_IPL, 0x6e0, 0x50, CCW_FLAG_SLI),
+ },
+ .restart_psw = { .mask = 0, .addr = IPL_START, },
+ .external_new_psw = { .mask = PSW_MASK_DISABLED, .addr = __LC_EXT_NEW_PSW, },
+ .svc_new_psw = { .mask = PSW_MASK_DISABLED, .addr = __LC_SVC_NEW_PSW, },
+ .program_new_psw = { .mask = PSW_MASK_DISABLED, .addr = __LC_PGM_NEW_PSW, },
+ .mcck_new_psw = { .mask = PSW_MASK_DISABLED, .addr = __LC_MCK_NEW_PSW, },
+ .io_new_psw = { .mask = PSW_MASK_DISABLED, .addr = __LC_IO_NEW_PSW, },
+};
diff --git a/arch/s390/boot/ipl_parm.c b/arch/s390/boot/ipl_parm.c
new file mode 100644
index 0000000000..7b75217626
--- /dev/null
+++ b/arch/s390/boot/ipl_parm.c
@@ -0,0 +1,306 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/ctype.h>
+#include <linux/pgtable.h>
+#include <asm/ebcdic.h>
+#include <asm/sclp.h>
+#include <asm/sections.h>
+#include <asm/boot_data.h>
+#include <asm/facility.h>
+#include <asm/setup.h>
+#include <asm/uv.h>
+#include "boot.h"
+
+struct parmarea parmarea __section(".parmarea") = {
+ .kernel_version = (unsigned long)kernel_version,
+ .max_command_line_size = COMMAND_LINE_SIZE,
+ .command_line = "root=/dev/ram0 ro",
+};
+
+char __bootdata(early_command_line)[COMMAND_LINE_SIZE];
+
+unsigned int __bootdata_preserved(zlib_dfltcc_support) = ZLIB_DFLTCC_FULL;
+struct ipl_parameter_block __bootdata_preserved(ipl_block);
+int __bootdata_preserved(ipl_block_valid);
+int __bootdata_preserved(__kaslr_enabled);
+
+unsigned long vmalloc_size = VMALLOC_DEFAULT_SIZE;
+unsigned long memory_limit;
+int vmalloc_size_set;
+
+static inline int __diag308(unsigned long subcode, void *addr)
+{
+ unsigned long reg1, reg2;
+ union register_pair r1;
+ psw_t old;
+
+ r1.even = (unsigned long) addr;
+ r1.odd = 0;
+ asm volatile(
+ " mvc 0(16,%[psw_old]),0(%[psw_pgm])\n"
+ " epsw %[reg1],%[reg2]\n"
+ " st %[reg1],0(%[psw_pgm])\n"
+ " st %[reg2],4(%[psw_pgm])\n"
+ " larl %[reg1],1f\n"
+ " stg %[reg1],8(%[psw_pgm])\n"
+ " diag %[r1],%[subcode],0x308\n"
+ "1: mvc 0(16,%[psw_pgm]),0(%[psw_old])\n"
+ : [r1] "+&d" (r1.pair),
+ [reg1] "=&d" (reg1),
+ [reg2] "=&a" (reg2),
+ "+Q" (S390_lowcore.program_new_psw),
+ "=Q" (old)
+ : [subcode] "d" (subcode),
+ [psw_old] "a" (&old),
+ [psw_pgm] "a" (&S390_lowcore.program_new_psw)
+ : "cc", "memory");
+ return r1.odd;
+}
+
+void store_ipl_parmblock(void)
+{
+ int rc;
+
+ rc = __diag308(DIAG308_STORE, &ipl_block);
+ if (rc == DIAG308_RC_OK &&
+ ipl_block.hdr.version <= IPL_MAX_SUPPORTED_VERSION)
+ ipl_block_valid = 1;
+}
+
+bool is_ipl_block_dump(void)
+{
+ if (ipl_block.pb0_hdr.pbt == IPL_PBT_FCP &&
+ ipl_block.fcp.opt == IPL_PB0_FCP_OPT_DUMP)
+ return true;
+ if (ipl_block.pb0_hdr.pbt == IPL_PBT_NVME &&
+ ipl_block.nvme.opt == IPL_PB0_NVME_OPT_DUMP)
+ return true;
+ if (ipl_block.pb0_hdr.pbt == IPL_PBT_ECKD &&
+ ipl_block.eckd.opt == IPL_PB0_ECKD_OPT_DUMP)
+ return true;
+ return false;
+}
+
+static size_t scpdata_length(const u8 *buf, size_t count)
+{
+ while (count) {
+ if (buf[count - 1] != '\0' && buf[count - 1] != ' ')
+ break;
+ count--;
+ }
+ return count;
+}
+
+static size_t ipl_block_get_ascii_scpdata(char *dest, size_t size,
+ const struct ipl_parameter_block *ipb)
+{
+ const __u8 *scp_data;
+ __u32 scp_data_len;
+ int has_lowercase;
+ size_t count = 0;
+ size_t i;
+
+ switch (ipb->pb0_hdr.pbt) {
+ case IPL_PBT_FCP:
+ scp_data_len = ipb->fcp.scp_data_len;
+ scp_data = ipb->fcp.scp_data;
+ break;
+ case IPL_PBT_NVME:
+ scp_data_len = ipb->nvme.scp_data_len;
+ scp_data = ipb->nvme.scp_data;
+ break;
+ case IPL_PBT_ECKD:
+ scp_data_len = ipb->eckd.scp_data_len;
+ scp_data = ipb->eckd.scp_data;
+ break;
+
+ default:
+ goto out;
+ }
+
+ count = min(size - 1, scpdata_length(scp_data, scp_data_len));
+ if (!count)
+ goto out;
+
+ has_lowercase = 0;
+ for (i = 0; i < count; i++) {
+ if (!isascii(scp_data[i])) {
+ count = 0;
+ goto out;
+ }
+ if (!has_lowercase && islower(scp_data[i]))
+ has_lowercase = 1;
+ }
+
+ if (has_lowercase)
+ memcpy(dest, scp_data, count);
+ else
+ for (i = 0; i < count; i++)
+ dest[i] = tolower(scp_data[i]);
+out:
+ dest[count] = '\0';
+ return count;
+}
+
+static void append_ipl_block_parm(void)
+{
+ char *parm, *delim;
+ size_t len, rc = 0;
+
+ len = strlen(early_command_line);
+
+ delim = early_command_line + len; /* '\0' character position */
+ parm = early_command_line + len + 1; /* append right after '\0' */
+
+ switch (ipl_block.pb0_hdr.pbt) {
+ case IPL_PBT_CCW:
+ rc = ipl_block_get_ascii_vmparm(
+ parm, COMMAND_LINE_SIZE - len - 1, &ipl_block);
+ break;
+ case IPL_PBT_FCP:
+ case IPL_PBT_NVME:
+ case IPL_PBT_ECKD:
+ rc = ipl_block_get_ascii_scpdata(
+ parm, COMMAND_LINE_SIZE - len - 1, &ipl_block);
+ break;
+ }
+ if (rc) {
+ if (*parm == '=')
+ memmove(early_command_line, parm + 1, rc);
+ else
+ *delim = ' '; /* replace '\0' with space */
+ }
+}
+
+static inline int has_ebcdic_char(const char *str)
+{
+ int i;
+
+ for (i = 0; str[i]; i++)
+ if (str[i] & 0x80)
+ return 1;
+ return 0;
+}
+
+void setup_boot_command_line(void)
+{
+ parmarea.command_line[COMMAND_LINE_SIZE - 1] = 0;
+ /* convert arch command line to ascii if necessary */
+ if (has_ebcdic_char(parmarea.command_line))
+ EBCASC(parmarea.command_line, COMMAND_LINE_SIZE);
+ /* copy arch command line */
+ strcpy(early_command_line, strim(parmarea.command_line));
+
+ /* append IPL PARM data to the boot command line */
+ if (!is_prot_virt_guest() && ipl_block_valid)
+ append_ipl_block_parm();
+}
+
+static void modify_facility(unsigned long nr, bool clear)
+{
+ if (clear)
+ __clear_facility(nr, stfle_fac_list);
+ else
+ __set_facility(nr, stfle_fac_list);
+}
+
+static void check_cleared_facilities(void)
+{
+ unsigned long als[] = { FACILITIES_ALS };
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(als); i++) {
+ if ((stfle_fac_list[i] & als[i]) != als[i]) {
+ sclp_early_printk("Warning: The Linux kernel requires facilities cleared via command line option\n");
+ print_missing_facilities();
+ break;
+ }
+ }
+}
+
+static void modify_fac_list(char *str)
+{
+ unsigned long val, endval;
+ char *endp;
+ bool clear;
+
+ while (*str) {
+ clear = false;
+ if (*str == '!') {
+ clear = true;
+ str++;
+ }
+ val = simple_strtoull(str, &endp, 0);
+ if (str == endp)
+ break;
+ str = endp;
+ if (*str == '-') {
+ str++;
+ endval = simple_strtoull(str, &endp, 0);
+ if (str == endp)
+ break;
+ str = endp;
+ while (val <= endval) {
+ modify_facility(val, clear);
+ val++;
+ }
+ } else {
+ modify_facility(val, clear);
+ }
+ if (*str != ',')
+ break;
+ str++;
+ }
+ check_cleared_facilities();
+}
+
+static char command_line_buf[COMMAND_LINE_SIZE];
+void parse_boot_command_line(void)
+{
+ char *param, *val;
+ bool enabled;
+ char *args;
+ int rc;
+
+ __kaslr_enabled = IS_ENABLED(CONFIG_RANDOMIZE_BASE);
+ args = strcpy(command_line_buf, early_command_line);
+ while (*args) {
+ args = next_arg(args, &param, &val);
+
+ if (!strcmp(param, "mem") && val)
+ memory_limit = round_down(memparse(val, NULL), PAGE_SIZE);
+
+ if (!strcmp(param, "vmalloc") && val) {
+ vmalloc_size = round_up(memparse(val, NULL), PAGE_SIZE);
+ vmalloc_size_set = 1;
+ }
+
+ if (!strcmp(param, "dfltcc") && val) {
+ if (!strcmp(val, "off"))
+ zlib_dfltcc_support = ZLIB_DFLTCC_DISABLED;
+ else if (!strcmp(val, "on"))
+ zlib_dfltcc_support = ZLIB_DFLTCC_FULL;
+ else if (!strcmp(val, "def_only"))
+ zlib_dfltcc_support = ZLIB_DFLTCC_DEFLATE_ONLY;
+ else if (!strcmp(val, "inf_only"))
+ zlib_dfltcc_support = ZLIB_DFLTCC_INFLATE_ONLY;
+ else if (!strcmp(val, "always"))
+ zlib_dfltcc_support = ZLIB_DFLTCC_FULL_DEBUG;
+ }
+
+ if (!strcmp(param, "facilities") && val)
+ modify_fac_list(val);
+
+ if (!strcmp(param, "nokaslr"))
+ __kaslr_enabled = 0;
+
+#if IS_ENABLED(CONFIG_KVM)
+ if (!strcmp(param, "prot_virt")) {
+ rc = kstrtobool(val, &enabled);
+ if (!rc && enabled)
+ prot_virt_host = 1;
+ }
+#endif
+ }
+}
diff --git a/arch/s390/boot/ipl_report.c b/arch/s390/boot/ipl_report.c
new file mode 100644
index 0000000000..1803035e68
--- /dev/null
+++ b/arch/s390/boot/ipl_report.c
@@ -0,0 +1,165 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/init.h>
+#include <linux/ctype.h>
+#include <asm/ebcdic.h>
+#include <asm/sclp.h>
+#include <asm/sections.h>
+#include <asm/boot_data.h>
+#include <asm/physmem_info.h>
+#include <uapi/asm/ipl.h>
+#include "boot.h"
+
+int __bootdata_preserved(ipl_secure_flag);
+
+unsigned long __bootdata_preserved(ipl_cert_list_addr);
+unsigned long __bootdata_preserved(ipl_cert_list_size);
+
+unsigned long __bootdata(early_ipl_comp_list_addr);
+unsigned long __bootdata(early_ipl_comp_list_size);
+
+static struct ipl_rb_certificates *certs;
+static struct ipl_rb_components *comps;
+static bool ipl_report_needs_saving;
+
+#define for_each_rb_entry(entry, rb) \
+ for (entry = rb->entries; \
+ (void *) entry + sizeof(*entry) <= (void *) rb + rb->len; \
+ entry++)
+
+static unsigned long get_cert_comp_list_size(void)
+{
+ struct ipl_rb_certificate_entry *cert;
+ struct ipl_rb_component_entry *comp;
+ size_t size;
+
+ /*
+ * Find the length for the IPL report boot data
+ */
+ early_ipl_comp_list_size = 0;
+ for_each_rb_entry(comp, comps)
+ early_ipl_comp_list_size += sizeof(*comp);
+ ipl_cert_list_size = 0;
+ for_each_rb_entry(cert, certs)
+ ipl_cert_list_size += sizeof(unsigned int) + cert->len;
+ return ipl_cert_list_size + early_ipl_comp_list_size;
+}
+
+bool ipl_report_certs_intersects(unsigned long addr, unsigned long size,
+ unsigned long *intersection_start)
+{
+ struct ipl_rb_certificate_entry *cert;
+
+ if (!ipl_report_needs_saving)
+ return false;
+
+ for_each_rb_entry(cert, certs) {
+ if (intersects(addr, size, cert->addr, cert->len)) {
+ *intersection_start = cert->addr;
+ return true;
+ }
+ }
+ return false;
+}
+
+static void copy_components_bootdata(void)
+{
+ struct ipl_rb_component_entry *comp, *ptr;
+
+ ptr = (struct ipl_rb_component_entry *) early_ipl_comp_list_addr;
+ for_each_rb_entry(comp, comps)
+ memcpy(ptr++, comp, sizeof(*ptr));
+}
+
+static void copy_certificates_bootdata(void)
+{
+ struct ipl_rb_certificate_entry *cert;
+ void *ptr;
+
+ ptr = (void *) ipl_cert_list_addr;
+ for_each_rb_entry(cert, certs) {
+ *(unsigned int *) ptr = cert->len;
+ ptr += sizeof(unsigned int);
+ memcpy(ptr, (void *) cert->addr, cert->len);
+ ptr += cert->len;
+ }
+}
+
+int read_ipl_report(void)
+{
+ struct ipl_pl_hdr *pl_hdr;
+ struct ipl_rl_hdr *rl_hdr;
+ struct ipl_rb_hdr *rb_hdr;
+ unsigned long tmp;
+ void *rl_end;
+
+ /*
+ * Check if there is a IPL report by looking at the copy
+ * of the IPL parameter information block.
+ */
+ if (!ipl_block_valid ||
+ !(ipl_block.hdr.flags & IPL_PL_FLAG_IPLSR))
+ return -1;
+ ipl_secure_flag = !!(ipl_block.hdr.flags & IPL_PL_FLAG_SIPL);
+ /*
+ * There is an IPL report, to find it load the pointer to the
+ * IPL parameter information block from lowcore and skip past
+ * the IPL parameter list, then align the address to a double
+ * word boundary.
+ */
+ tmp = (unsigned long) S390_lowcore.ipl_parmblock_ptr;
+ pl_hdr = (struct ipl_pl_hdr *) tmp;
+ tmp = (tmp + pl_hdr->len + 7) & -8UL;
+ rl_hdr = (struct ipl_rl_hdr *) tmp;
+ /* Walk through the IPL report blocks in the IPL Report list */
+ certs = NULL;
+ comps = NULL;
+ rl_end = (void *) rl_hdr + rl_hdr->len;
+ rb_hdr = (void *) rl_hdr + sizeof(*rl_hdr);
+ while ((void *) rb_hdr + sizeof(*rb_hdr) < rl_end &&
+ (void *) rb_hdr + rb_hdr->len <= rl_end) {
+
+ switch (rb_hdr->rbt) {
+ case IPL_RBT_CERTIFICATES:
+ certs = (struct ipl_rb_certificates *) rb_hdr;
+ break;
+ case IPL_RBT_COMPONENTS:
+ comps = (struct ipl_rb_components *) rb_hdr;
+ break;
+ default:
+ break;
+ }
+
+ rb_hdr = (void *) rb_hdr + rb_hdr->len;
+ }
+
+ /*
+ * With either the component list or the certificate list
+ * missing the kernel will stay ignorant of secure IPL.
+ */
+ if (!comps || !certs) {
+ certs = NULL;
+ return -1;
+ }
+
+ ipl_report_needs_saving = true;
+ physmem_reserve(RR_IPLREPORT, (unsigned long)pl_hdr,
+ (unsigned long)rl_end - (unsigned long)pl_hdr);
+ return 0;
+}
+
+void save_ipl_cert_comp_list(void)
+{
+ unsigned long size;
+
+ if (!ipl_report_needs_saving)
+ return;
+
+ size = get_cert_comp_list_size();
+ early_ipl_comp_list_addr = physmem_alloc_top_down(RR_CERT_COMP_LIST, size, sizeof(int));
+ ipl_cert_list_addr = early_ipl_comp_list_addr + early_ipl_comp_list_size;
+
+ copy_components_bootdata();
+ copy_certificates_bootdata();
+ physmem_free(RR_IPLREPORT);
+ ipl_report_needs_saving = false;
+}
diff --git a/arch/s390/boot/ipl_vmparm.c b/arch/s390/boot/ipl_vmparm.c
new file mode 100644
index 0000000000..8dacd5fadf
--- /dev/null
+++ b/arch/s390/boot/ipl_vmparm.c
@@ -0,0 +1,2 @@
+// SPDX-License-Identifier: GPL-2.0
+#include "../kernel/ipl_vmparm.c"
diff --git a/arch/s390/boot/kaslr.c b/arch/s390/boot/kaslr.c
new file mode 100644
index 0000000000..90602101e2
--- /dev/null
+++ b/arch/s390/boot/kaslr.c
@@ -0,0 +1,198 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright IBM Corp. 2019
+ */
+#include <linux/pgtable.h>
+#include <asm/physmem_info.h>
+#include <asm/cpacf.h>
+#include <asm/timex.h>
+#include <asm/sclp.h>
+#include <asm/kasan.h>
+#include "decompressor.h"
+#include "boot.h"
+
+#define PRNG_MODE_TDES 1
+#define PRNG_MODE_SHA512 2
+#define PRNG_MODE_TRNG 3
+
+struct prno_parm {
+ u32 res;
+ u32 reseed_counter;
+ u64 stream_bytes;
+ u8 V[112];
+ u8 C[112];
+};
+
+struct prng_parm {
+ u8 parm_block[32];
+ u32 reseed_counter;
+ u64 byte_counter;
+};
+
+static int check_prng(void)
+{
+ if (!cpacf_query_func(CPACF_KMC, CPACF_KMC_PRNG)) {
+ sclp_early_printk("KASLR disabled: CPU has no PRNG\n");
+ return 0;
+ }
+ if (cpacf_query_func(CPACF_PRNO, CPACF_PRNO_TRNG))
+ return PRNG_MODE_TRNG;
+ if (cpacf_query_func(CPACF_PRNO, CPACF_PRNO_SHA512_DRNG_GEN))
+ return PRNG_MODE_SHA512;
+ else
+ return PRNG_MODE_TDES;
+}
+
+static int get_random(unsigned long limit, unsigned long *value)
+{
+ struct prng_parm prng = {
+ /* initial parameter block for tdes mode, copied from libica */
+ .parm_block = {
+ 0x0F, 0x2B, 0x8E, 0x63, 0x8C, 0x8E, 0xD2, 0x52,
+ 0x64, 0xB7, 0xA0, 0x7B, 0x75, 0x28, 0xB8, 0xF4,
+ 0x75, 0x5F, 0xD2, 0xA6, 0x8D, 0x97, 0x11, 0xFF,
+ 0x49, 0xD8, 0x23, 0xF3, 0x7E, 0x21, 0xEC, 0xA0
+ },
+ };
+ unsigned long seed, random;
+ struct prno_parm prno;
+ __u64 entropy[4];
+ int mode, i;
+
+ mode = check_prng();
+ seed = get_tod_clock_fast();
+ switch (mode) {
+ case PRNG_MODE_TRNG:
+ cpacf_trng(NULL, 0, (u8 *) &random, sizeof(random));
+ break;
+ case PRNG_MODE_SHA512:
+ cpacf_prno(CPACF_PRNO_SHA512_DRNG_SEED, &prno, NULL, 0,
+ (u8 *) &seed, sizeof(seed));
+ cpacf_prno(CPACF_PRNO_SHA512_DRNG_GEN, &prno, (u8 *) &random,
+ sizeof(random), NULL, 0);
+ break;
+ case PRNG_MODE_TDES:
+ /* add entropy */
+ *(unsigned long *) prng.parm_block ^= seed;
+ for (i = 0; i < 16; i++) {
+ cpacf_kmc(CPACF_KMC_PRNG, prng.parm_block,
+ (u8 *) entropy, (u8 *) entropy,
+ sizeof(entropy));
+ memcpy(prng.parm_block, entropy, sizeof(entropy));
+ }
+ random = seed;
+ cpacf_kmc(CPACF_KMC_PRNG, prng.parm_block, (u8 *) &random,
+ (u8 *) &random, sizeof(random));
+ break;
+ default:
+ return -1;
+ }
+ *value = random % limit;
+ return 0;
+}
+
+static void sort_reserved_ranges(struct reserved_range *res, unsigned long size)
+{
+ struct reserved_range tmp;
+ int i, j;
+
+ for (i = 1; i < size; i++) {
+ tmp = res[i];
+ for (j = i - 1; j >= 0 && res[j].start > tmp.start; j--)
+ res[j + 1] = res[j];
+ res[j + 1] = tmp;
+ }
+}
+
+static unsigned long iterate_valid_positions(unsigned long size, unsigned long align,
+ unsigned long _min, unsigned long _max,
+ struct reserved_range *res, size_t res_count,
+ bool pos_count, unsigned long find_pos)
+{
+ unsigned long start, end, tmp_end, range_pos, pos = 0;
+ struct reserved_range *res_end = res + res_count;
+ struct reserved_range *skip_res;
+ int i;
+
+ align = max(align, 8UL);
+ _min = round_up(_min, align);
+ for_each_physmem_usable_range(i, &start, &end) {
+ if (_min >= end)
+ continue;
+ start = round_up(start, align);
+ if (start >= _max)
+ break;
+ start = max(_min, start);
+ end = min(_max, end);
+
+ while (start + size <= end) {
+ /* skip reserved ranges below the start */
+ while (res && res->end <= start) {
+ res++;
+ if (res >= res_end)
+ res = NULL;
+ }
+ skip_res = NULL;
+ tmp_end = end;
+ /* has intersecting reserved range */
+ if (res && res->start < end) {
+ skip_res = res;
+ tmp_end = res->start;
+ }
+ if (start + size <= tmp_end) {
+ range_pos = (tmp_end - start - size) / align + 1;
+ if (pos_count) {
+ pos += range_pos;
+ } else {
+ if (range_pos >= find_pos)
+ return start + (find_pos - 1) * align;
+ find_pos -= range_pos;
+ }
+ }
+ if (!skip_res)
+ break;
+ start = round_up(skip_res->end, align);
+ }
+ }
+
+ return pos_count ? pos : 0;
+}
+
+/*
+ * Two types of decompressor memory allocations/reserves are considered
+ * differently.
+ *
+ * "Static" or "single" allocations are done via physmem_alloc_range() and
+ * physmem_reserve(), and they are listed in physmem_info.reserved[]. Each
+ * type of "static" allocation can only have one allocation per type and
+ * cannot have chains.
+ *
+ * On the other hand, "dynamic" or "repetitive" allocations are done via
+ * physmem_alloc_top_down(). These allocations are tightly packed together
+ * top down from the end of online memory. physmem_alloc_pos represents
+ * current position where those allocations start.
+ *
+ * Functions randomize_within_range() and iterate_valid_positions()
+ * only consider "dynamic" allocations by never looking above
+ * physmem_alloc_pos. "Static" allocations, however, are explicitly
+ * considered by checking the "res" (reserves) array. The first
+ * reserved_range of a "dynamic" allocation may also be checked along the
+ * way, but it will always be above the maximum value anyway.
+ */
+unsigned long randomize_within_range(unsigned long size, unsigned long align,
+ unsigned long min, unsigned long max)
+{
+ struct reserved_range res[RR_MAX];
+ unsigned long max_pos, pos;
+
+ memcpy(res, physmem_info.reserved, sizeof(res));
+ sort_reserved_ranges(res, ARRAY_SIZE(res));
+ max = min(max, get_physmem_alloc_pos());
+
+ max_pos = iterate_valid_positions(size, align, min, max, res, ARRAY_SIZE(res), true, 0);
+ if (!max_pos)
+ return 0;
+ if (get_random(max_pos, &pos))
+ return 0;
+ return iterate_valid_positions(size, align, min, max, res, ARRAY_SIZE(res), false, pos + 1);
+}
diff --git a/arch/s390/boot/machine_kexec_reloc.c b/arch/s390/boot/machine_kexec_reloc.c
new file mode 100644
index 0000000000..b7a5d0f720
--- /dev/null
+++ b/arch/s390/boot/machine_kexec_reloc.c
@@ -0,0 +1,2 @@
+// SPDX-License-Identifier: GPL-2.0
+#include "../kernel/machine_kexec_reloc.c"
diff --git a/arch/s390/boot/mem.S b/arch/s390/boot/mem.S
new file mode 100644
index 0000000000..b33463633f
--- /dev/null
+++ b/arch/s390/boot/mem.S
@@ -0,0 +1,2 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#include "../lib/mem.S"
diff --git a/arch/s390/boot/pgm_check_info.c b/arch/s390/boot/pgm_check_info.c
new file mode 100644
index 0000000000..97244cd7a2
--- /dev/null
+++ b/arch/s390/boot/pgm_check_info.c
@@ -0,0 +1,179 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/kernel.h>
+#include <linux/stdarg.h>
+#include <linux/string.h>
+#include <linux/ctype.h>
+#include <asm/stacktrace.h>
+#include <asm/boot_data.h>
+#include <asm/lowcore.h>
+#include <asm/setup.h>
+#include <asm/sclp.h>
+#include <asm/uv.h>
+#include "boot.h"
+
+const char hex_asc[] = "0123456789abcdef";
+
+static char *as_hex(char *dst, unsigned long val, int pad)
+{
+ char *p, *end = p = dst + max(pad, (int)__fls(val | 1) / 4 + 1);
+
+ for (*p-- = 0; p >= dst; val >>= 4)
+ *p-- = hex_asc[val & 0x0f];
+ return end;
+}
+
+static char *symstart(char *p)
+{
+ while (*p)
+ p--;
+ return p + 1;
+}
+
+static noinline char *findsym(unsigned long ip, unsigned short *off, unsigned short *len)
+{
+ /* symbol entries are in a form "10000 c4 startup\0" */
+ char *a = _decompressor_syms_start;
+ char *b = _decompressor_syms_end;
+ unsigned long start;
+ unsigned long size;
+ char *pivot;
+ char *endp;
+
+ while (a < b) {
+ pivot = symstart(a + (b - a) / 2);
+ start = simple_strtoull(pivot, &endp, 16);
+ size = simple_strtoull(endp + 1, &endp, 16);
+ if (ip < start) {
+ b = pivot;
+ continue;
+ }
+ if (ip > start + size) {
+ a = pivot + strlen(pivot) + 1;
+ continue;
+ }
+ *off = ip - start;
+ *len = size;
+ return endp + 1;
+ }
+ return NULL;
+}
+
+static noinline char *strsym(void *ip)
+{
+ static char buf[64];
+ unsigned short off;
+ unsigned short len;
+ char *p;
+
+ p = findsym((unsigned long)ip, &off, &len);
+ if (p) {
+ strncpy(buf, p, sizeof(buf));
+ /* reserve 15 bytes for offset/len in symbol+0x1234/0x1234 */
+ p = buf + strnlen(buf, sizeof(buf) - 15);
+ strcpy(p, "+0x");
+ p = as_hex(p + 3, off, 0);
+ strcpy(p, "/0x");
+ as_hex(p + 3, len, 0);
+ } else {
+ as_hex(buf, (unsigned long)ip, 16);
+ }
+ return buf;
+}
+
+void decompressor_printk(const char *fmt, ...)
+{
+ char buf[1024] = { 0 };
+ char *end = buf + sizeof(buf) - 1; /* make sure buf is 0 terminated */
+ unsigned long pad;
+ char *p = buf;
+ va_list args;
+
+ va_start(args, fmt);
+ for (; p < end && *fmt; fmt++) {
+ if (*fmt != '%') {
+ *p++ = *fmt;
+ continue;
+ }
+ pad = isdigit(*++fmt) ? simple_strtol(fmt, (char **)&fmt, 10) : 0;
+ switch (*fmt) {
+ case 's':
+ p = buf + strlcat(buf, va_arg(args, char *), sizeof(buf));
+ break;
+ case 'p':
+ if (*++fmt != 'S')
+ goto out;
+ p = buf + strlcat(buf, strsym(va_arg(args, void *)), sizeof(buf));
+ break;
+ case 'l':
+ if (*++fmt != 'x' || end - p <= max(sizeof(long) * 2, pad))
+ goto out;
+ p = as_hex(p, va_arg(args, unsigned long), pad);
+ break;
+ case 'x':
+ if (end - p <= max(sizeof(int) * 2, pad))
+ goto out;
+ p = as_hex(p, va_arg(args, unsigned int), pad);
+ break;
+ default:
+ goto out;
+ }
+ }
+out:
+ va_end(args);
+ sclp_early_printk(buf);
+}
+
+void print_stacktrace(unsigned long sp)
+{
+ struct stack_info boot_stack = { STACK_TYPE_TASK, (unsigned long)_stack_start,
+ (unsigned long)_stack_end };
+ bool first = true;
+
+ decompressor_printk("Call Trace:\n");
+ while (!(sp & 0x7) && on_stack(&boot_stack, sp, sizeof(struct stack_frame))) {
+ struct stack_frame *sf = (struct stack_frame *)sp;
+
+ decompressor_printk(first ? "(sp:%016lx [<%016lx>] %pS)\n" :
+ " sp:%016lx [<%016lx>] %pS\n",
+ sp, sf->gprs[8], (void *)sf->gprs[8]);
+ if (sf->back_chain <= sp)
+ break;
+ sp = sf->back_chain;
+ first = false;
+ }
+}
+
+void print_pgm_check_info(void)
+{
+ unsigned long *gpregs = (unsigned long *)S390_lowcore.gpregs_save_area;
+ struct psw_bits *psw = &psw_bits(S390_lowcore.psw_save_area);
+
+ decompressor_printk("Linux version %s\n", kernel_version);
+ if (!is_prot_virt_guest() && early_command_line[0])
+ decompressor_printk("Kernel command line: %s\n", early_command_line);
+ decompressor_printk("Kernel fault: interruption code %04x ilc:%x\n",
+ S390_lowcore.pgm_code, S390_lowcore.pgm_ilc >> 1);
+ if (kaslr_enabled())
+ decompressor_printk("Kernel random base: %lx\n", __kaslr_offset);
+ decompressor_printk("PSW : %016lx %016lx (%pS)\n",
+ S390_lowcore.psw_save_area.mask,
+ S390_lowcore.psw_save_area.addr,
+ (void *)S390_lowcore.psw_save_area.addr);
+ decompressor_printk(
+ " R:%x T:%x IO:%x EX:%x Key:%x M:%x W:%x P:%x AS:%x CC:%x PM:%x RI:%x EA:%x\n",
+ psw->per, psw->dat, psw->io, psw->ext, psw->key, psw->mcheck,
+ psw->wait, psw->pstate, psw->as, psw->cc, psw->pm, psw->ri,
+ psw->eaba);
+ decompressor_printk("GPRS: %016lx %016lx %016lx %016lx\n",
+ gpregs[0], gpregs[1], gpregs[2], gpregs[3]);
+ decompressor_printk(" %016lx %016lx %016lx %016lx\n",
+ gpregs[4], gpregs[5], gpregs[6], gpregs[7]);
+ decompressor_printk(" %016lx %016lx %016lx %016lx\n",
+ gpregs[8], gpregs[9], gpregs[10], gpregs[11]);
+ decompressor_printk(" %016lx %016lx %016lx %016lx\n",
+ gpregs[12], gpregs[13], gpregs[14], gpregs[15]);
+ print_stacktrace(S390_lowcore.gpregs_save_area[15]);
+ decompressor_printk("Last Breaking-Event-Address:\n");
+ decompressor_printk(" [<%016lx>] %pS\n", (unsigned long)S390_lowcore.pgm_last_break,
+ (void *)S390_lowcore.pgm_last_break);
+}
diff --git a/arch/s390/boot/physmem_info.c b/arch/s390/boot/physmem_info.c
new file mode 100644
index 0000000000..0cf79826ee
--- /dev/null
+++ b/arch/s390/boot/physmem_info.c
@@ -0,0 +1,328 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/processor.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <asm/physmem_info.h>
+#include <asm/stacktrace.h>
+#include <asm/boot_data.h>
+#include <asm/sparsemem.h>
+#include <asm/sections.h>
+#include <asm/setup.h>
+#include <asm/sclp.h>
+#include <asm/uv.h>
+#include "decompressor.h"
+#include "boot.h"
+
+struct physmem_info __bootdata(physmem_info);
+static unsigned int physmem_alloc_ranges;
+static unsigned long physmem_alloc_pos;
+
+/* up to 256 storage elements, 1020 subincrements each */
+#define ENTRIES_EXTENDED_MAX \
+ (256 * (1020 / 2) * sizeof(struct physmem_range))
+
+static struct physmem_range *__get_physmem_range_ptr(u32 n)
+{
+ if (n < MEM_INLINED_ENTRIES)
+ return &physmem_info.online[n];
+ if (unlikely(!physmem_info.online_extended)) {
+ physmem_info.online_extended = (struct physmem_range *)physmem_alloc_range(
+ RR_MEM_DETECT_EXTENDED, ENTRIES_EXTENDED_MAX, sizeof(long), 0,
+ physmem_alloc_pos, true);
+ }
+ return &physmem_info.online_extended[n - MEM_INLINED_ENTRIES];
+}
+
+/*
+ * sequential calls to add_physmem_online_range with adjacent memory ranges
+ * are merged together into single memory range.
+ */
+void add_physmem_online_range(u64 start, u64 end)
+{
+ struct physmem_range *range;
+
+ if (physmem_info.range_count) {
+ range = __get_physmem_range_ptr(physmem_info.range_count - 1);
+ if (range->end == start) {
+ range->end = end;
+ return;
+ }
+ }
+
+ range = __get_physmem_range_ptr(physmem_info.range_count);
+ range->start = start;
+ range->end = end;
+ physmem_info.range_count++;
+}
+
+static int __diag260(unsigned long rx1, unsigned long rx2)
+{
+ unsigned long reg1, reg2, ry;
+ union register_pair rx;
+ psw_t old;
+ int rc;
+
+ rx.even = rx1;
+ rx.odd = rx2;
+ ry = 0x10; /* storage configuration */
+ rc = -1; /* fail */
+ asm volatile(
+ " mvc 0(16,%[psw_old]),0(%[psw_pgm])\n"
+ " epsw %[reg1],%[reg2]\n"
+ " st %[reg1],0(%[psw_pgm])\n"
+ " st %[reg2],4(%[psw_pgm])\n"
+ " larl %[reg1],1f\n"
+ " stg %[reg1],8(%[psw_pgm])\n"
+ " diag %[rx],%[ry],0x260\n"
+ " ipm %[rc]\n"
+ " srl %[rc],28\n"
+ "1: mvc 0(16,%[psw_pgm]),0(%[psw_old])\n"
+ : [reg1] "=&d" (reg1),
+ [reg2] "=&a" (reg2),
+ [rc] "+&d" (rc),
+ [ry] "+&d" (ry),
+ "+Q" (S390_lowcore.program_new_psw),
+ "=Q" (old)
+ : [rx] "d" (rx.pair),
+ [psw_old] "a" (&old),
+ [psw_pgm] "a" (&S390_lowcore.program_new_psw)
+ : "cc", "memory");
+ return rc == 0 ? ry : -1;
+}
+
+static int diag260(void)
+{
+ int rc, i;
+
+ struct {
+ unsigned long start;
+ unsigned long end;
+ } storage_extents[8] __aligned(16); /* VM supports up to 8 extends */
+
+ memset(storage_extents, 0, sizeof(storage_extents));
+ rc = __diag260((unsigned long)storage_extents, sizeof(storage_extents));
+ if (rc == -1)
+ return -1;
+
+ for (i = 0; i < min_t(int, rc, ARRAY_SIZE(storage_extents)); i++)
+ add_physmem_online_range(storage_extents[i].start, storage_extents[i].end + 1);
+ return 0;
+}
+
+static int tprot(unsigned long addr)
+{
+ unsigned long reg1, reg2;
+ int rc = -EFAULT;
+ psw_t old;
+
+ asm volatile(
+ " mvc 0(16,%[psw_old]),0(%[psw_pgm])\n"
+ " epsw %[reg1],%[reg2]\n"
+ " st %[reg1],0(%[psw_pgm])\n"
+ " st %[reg2],4(%[psw_pgm])\n"
+ " larl %[reg1],1f\n"
+ " stg %[reg1],8(%[psw_pgm])\n"
+ " tprot 0(%[addr]),0\n"
+ " ipm %[rc]\n"
+ " srl %[rc],28\n"
+ "1: mvc 0(16,%[psw_pgm]),0(%[psw_old])\n"
+ : [reg1] "=&d" (reg1),
+ [reg2] "=&a" (reg2),
+ [rc] "+&d" (rc),
+ "=Q" (S390_lowcore.program_new_psw.addr),
+ "=Q" (old)
+ : [psw_old] "a" (&old),
+ [psw_pgm] "a" (&S390_lowcore.program_new_psw),
+ [addr] "a" (addr)
+ : "cc", "memory");
+ return rc;
+}
+
+static unsigned long search_mem_end(void)
+{
+ unsigned long range = 1 << (MAX_PHYSMEM_BITS - 20); /* in 1MB blocks */
+ unsigned long offset = 0;
+ unsigned long pivot;
+
+ while (range > 1) {
+ range >>= 1;
+ pivot = offset + range;
+ if (!tprot(pivot << 20))
+ offset = pivot;
+ }
+ return (offset + 1) << 20;
+}
+
+unsigned long detect_max_physmem_end(void)
+{
+ unsigned long max_physmem_end = 0;
+
+ if (!sclp_early_get_memsize(&max_physmem_end)) {
+ physmem_info.info_source = MEM_DETECT_SCLP_READ_INFO;
+ } else {
+ max_physmem_end = search_mem_end();
+ physmem_info.info_source = MEM_DETECT_BIN_SEARCH;
+ }
+ return max_physmem_end;
+}
+
+void detect_physmem_online_ranges(unsigned long max_physmem_end)
+{
+ if (!sclp_early_read_storage_info()) {
+ physmem_info.info_source = MEM_DETECT_SCLP_STOR_INFO;
+ } else if (!diag260()) {
+ physmem_info.info_source = MEM_DETECT_DIAG260;
+ } else if (max_physmem_end) {
+ add_physmem_online_range(0, max_physmem_end);
+ }
+}
+
+void physmem_set_usable_limit(unsigned long limit)
+{
+ physmem_info.usable = limit;
+ physmem_alloc_pos = limit;
+}
+
+static void die_oom(unsigned long size, unsigned long align, unsigned long min, unsigned long max)
+{
+ unsigned long start, end, total_mem = 0, total_reserved_mem = 0;
+ struct reserved_range *range;
+ enum reserved_range_type t;
+ int i;
+
+ decompressor_printk("Linux version %s\n", kernel_version);
+ if (!is_prot_virt_guest() && early_command_line[0])
+ decompressor_printk("Kernel command line: %s\n", early_command_line);
+ decompressor_printk("Out of memory allocating %lx bytes %lx aligned in range %lx:%lx\n",
+ size, align, min, max);
+ decompressor_printk("Reserved memory ranges:\n");
+ for_each_physmem_reserved_range(t, range, &start, &end) {
+ decompressor_printk("%016lx %016lx %s\n", start, end, get_rr_type_name(t));
+ total_reserved_mem += end - start;
+ }
+ decompressor_printk("Usable online memory ranges (info source: %s [%x]):\n",
+ get_physmem_info_source(), physmem_info.info_source);
+ for_each_physmem_usable_range(i, &start, &end) {
+ decompressor_printk("%016lx %016lx\n", start, end);
+ total_mem += end - start;
+ }
+ decompressor_printk("Usable online memory total: %lx Reserved: %lx Free: %lx\n",
+ total_mem, total_reserved_mem,
+ total_mem > total_reserved_mem ? total_mem - total_reserved_mem : 0);
+ print_stacktrace(current_frame_address());
+ sclp_early_printk("\n\n -- System halted\n");
+ disabled_wait();
+}
+
+void physmem_reserve(enum reserved_range_type type, unsigned long addr, unsigned long size)
+{
+ physmem_info.reserved[type].start = addr;
+ physmem_info.reserved[type].end = addr + size;
+}
+
+void physmem_free(enum reserved_range_type type)
+{
+ physmem_info.reserved[type].start = 0;
+ physmem_info.reserved[type].end = 0;
+}
+
+static bool __physmem_alloc_intersects(unsigned long addr, unsigned long size,
+ unsigned long *intersection_start)
+{
+ unsigned long res_addr, res_size;
+ int t;
+
+ for (t = 0; t < RR_MAX; t++) {
+ if (!get_physmem_reserved(t, &res_addr, &res_size))
+ continue;
+ if (intersects(addr, size, res_addr, res_size)) {
+ *intersection_start = res_addr;
+ return true;
+ }
+ }
+ return ipl_report_certs_intersects(addr, size, intersection_start);
+}
+
+static unsigned long __physmem_alloc_range(unsigned long size, unsigned long align,
+ unsigned long min, unsigned long max,
+ unsigned int from_ranges, unsigned int *ranges_left,
+ bool die_on_oom)
+{
+ unsigned int nranges = from_ranges ?: physmem_info.range_count;
+ unsigned long range_start, range_end;
+ unsigned long intersection_start;
+ unsigned long addr, pos = max;
+
+ align = max(align, 8UL);
+ while (nranges) {
+ __get_physmem_range(nranges - 1, &range_start, &range_end, false);
+ pos = min(range_end, pos);
+
+ if (round_up(min, align) + size > pos)
+ break;
+ addr = round_down(pos - size, align);
+ if (range_start > addr) {
+ nranges--;
+ continue;
+ }
+ if (__physmem_alloc_intersects(addr, size, &intersection_start)) {
+ pos = intersection_start;
+ continue;
+ }
+
+ if (ranges_left)
+ *ranges_left = nranges;
+ return addr;
+ }
+ if (die_on_oom)
+ die_oom(size, align, min, max);
+ return 0;
+}
+
+unsigned long physmem_alloc_range(enum reserved_range_type type, unsigned long size,
+ unsigned long align, unsigned long min, unsigned long max,
+ bool die_on_oom)
+{
+ unsigned long addr;
+
+ max = min(max, physmem_alloc_pos);
+ addr = __physmem_alloc_range(size, align, min, max, 0, NULL, die_on_oom);
+ if (addr)
+ physmem_reserve(type, addr, size);
+ return addr;
+}
+
+unsigned long physmem_alloc_top_down(enum reserved_range_type type, unsigned long size,
+ unsigned long align)
+{
+ struct reserved_range *range = &physmem_info.reserved[type];
+ struct reserved_range *new_range;
+ unsigned int ranges_left;
+ unsigned long addr;
+
+ addr = __physmem_alloc_range(size, align, 0, physmem_alloc_pos, physmem_alloc_ranges,
+ &ranges_left, true);
+ /* if not a consecutive allocation of the same type or first allocation */
+ if (range->start != addr + size) {
+ if (range->end) {
+ physmem_alloc_pos = __physmem_alloc_range(
+ sizeof(struct reserved_range), 0, 0, physmem_alloc_pos,
+ physmem_alloc_ranges, &ranges_left, true);
+ new_range = (struct reserved_range *)physmem_alloc_pos;
+ *new_range = *range;
+ range->chain = new_range;
+ addr = __physmem_alloc_range(size, align, 0, physmem_alloc_pos,
+ ranges_left, &ranges_left, true);
+ }
+ range->end = addr + size;
+ }
+ range->start = addr;
+ physmem_alloc_pos = addr;
+ physmem_alloc_ranges = ranges_left;
+ return addr;
+}
+
+unsigned long get_physmem_alloc_pos(void)
+{
+ return physmem_alloc_pos;
+}
diff --git a/arch/s390/boot/sclp_early_core.c b/arch/s390/boot/sclp_early_core.c
new file mode 100644
index 0000000000..6f30646afb
--- /dev/null
+++ b/arch/s390/boot/sclp_early_core.c
@@ -0,0 +1,11 @@
+// SPDX-License-Identifier: GPL-2.0
+#include "boot.h"
+#include "../../../drivers/s390/char/sclp_early_core.c"
+
+/* SCLP early buffer must stay page-aligned and below 2GB */
+static char __sclp_early_sccb[EXT_SCCB_READ_SCP] __aligned(PAGE_SIZE);
+
+void sclp_early_setup_buffer(void)
+{
+ sclp_early_set_buffer(&__sclp_early_sccb);
+}
diff --git a/arch/s390/boot/startup.c b/arch/s390/boot/startup.c
new file mode 100644
index 0000000000..d3e48bd9c3
--- /dev/null
+++ b/arch/s390/boot/startup.c
@@ -0,0 +1,378 @@
+// 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/maccess.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 <asm/physmem_info.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);
+pte_t *__bootdata_preserved(memcpy_real_ptep);
+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_preserved(max_mappable);
+unsigned long __bootdata(ident_map_size);
+
+u64 __bootdata_preserved(stfle_fac_list[16]);
+u64 __bootdata_preserved(alt_stfle_fac_list[16]);
+struct oldmem_data __bootdata_preserved(oldmem_data);
+
+struct machine_info machine;
+
+void error(char *x)
+{
+ sclp_early_printk("\n\n");
+ sclp_early_printk(x);
+ sclp_early_printk("\n\n -- System halted");
+
+ disabled_wait();
+}
+
+static void detect_facilities(void)
+{
+ if (test_facility(8)) {
+ machine.has_edat1 = 1;
+ __ctl_set_bit(0, 23);
+ }
+ if (test_facility(78))
+ machine.has_edat2 = 1;
+ if (test_facility(130))
+ machine.has_nx = 1;
+}
+
+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 void rescue_initrd(unsigned long min, unsigned long max)
+{
+ unsigned long old_addr, addr, size;
+
+ if (!IS_ENABLED(CONFIG_BLK_DEV_INITRD))
+ return;
+ if (!get_physmem_reserved(RR_INITRD, &addr, &size))
+ return;
+ if (addr >= min && addr + size <= max)
+ return;
+ old_addr = addr;
+ physmem_free(RR_INITRD);
+ addr = physmem_alloc_top_down(RR_INITRD, size, 0);
+ memmove((void *)addr, (void *)old_addr, 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 range (get_physmem_online_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 unsigned long setup_kernel_memory_layout(void)
+{
+ unsigned long vmemmap_start;
+ unsigned long asce_limit;
+ unsigned long rte_size;
+ unsigned long pages;
+ unsigned long vsize;
+ 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. */
+ vsize = round_up(ident_map_size, _REGION3_SIZE) + vmemmap_size +
+ MODULES_LEN + MEMCPY_REAL_SIZE + ABS_LOWCORE_MAP_SIZE;
+ vsize = size_add(vsize, vmalloc_size);
+ if (IS_ENABLED(CONFIG_KASAN) || (vsize > _REGION2_SIZE)) {
+ asce_limit = _REGION1_SIZE;
+ rte_size = _REGION2_SIZE;
+ } else {
+ asce_limit = _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(asce_limit);
+#ifdef CONFIG_KASAN
+ /* force vmalloc and modules below kasan shadow */
+ vmax = min(vmax, KASAN_SHADOW_START);
+#endif
+ __memcpy_real_area = round_down(vmax - MEMCPY_REAL_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 = min(vmemmap_start, 1UL << MAX_PHYSMEM_BITS);
+ /* maximum mappable address as seen by arch_get_mappable_range() */
+ max_mappable = vmemmap_start;
+ /* 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;
+
+ return asce_limit;
+}
+
+/*
+ * This function clears the BSS section of the decompressed Linux kernel and NOT the decompressor's.
+ */
+static void clear_bss_section(unsigned long vmlinux_lma)
+{
+ memset((void *)vmlinux_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)
+{
+ *(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;
+ vmlinux.init_mm_off += offset;
+ vmlinux.swapper_pg_dir_off += offset;
+ vmlinux.invalid_pg_dir_off += offset;
+#ifdef CONFIG_KASAN
+ vmlinux.kasan_early_shadow_page_off += offset;
+ vmlinux.kasan_early_shadow_pte_off += offset;
+ vmlinux.kasan_early_shadow_pmd_off += offset;
+ vmlinux.kasan_early_shadow_pud_off += offset;
+ vmlinux.kasan_early_shadow_p4d_off += offset;
+#endif
+}
+
+void startup_kernel(void)
+{
+ unsigned long max_physmem_end;
+ unsigned long vmlinux_lma = 0;
+ unsigned long amode31_lma = 0;
+ unsigned long asce_limit;
+ unsigned long safe_addr;
+ void *img;
+ psw_t psw;
+
+ setup_lpp();
+ safe_addr = mem_safe_offset();
+
+ /*
+ * Reserve decompressor memory together with decompression heap, buffer and
+ * memory which might be occupied by uncompressed kernel at default 1Mb
+ * position (if KASLR is off or failed).
+ */
+ physmem_reserve(RR_DECOMPRESSOR, 0, safe_addr);
+ if (IS_ENABLED(CONFIG_BLK_DEV_INITRD) && parmarea.initrd_size)
+ physmem_reserve(RR_INITRD, parmarea.initrd_start, parmarea.initrd_size);
+ oldmem_data.start = parmarea.oldmem_base;
+ oldmem_data.size = parmarea.oldmem_size;
+
+ store_ipl_parmblock();
+ read_ipl_report();
+ uv_query_info();
+ sclp_early_read_info();
+ setup_boot_command_line();
+ parse_boot_command_line();
+ detect_facilities();
+ sanitize_prot_virt_host();
+ max_physmem_end = detect_max_physmem_end();
+ setup_ident_map_size(max_physmem_end);
+ setup_vmalloc_size();
+ asce_limit = setup_kernel_memory_layout();
+ /* got final ident_map_size, physmem allocations could be performed now */
+ physmem_set_usable_limit(ident_map_size);
+ detect_physmem_online_ranges(max_physmem_end);
+ save_ipl_cert_comp_list();
+ rescue_initrd(safe_addr, ident_map_size);
+
+ if (kaslr_enabled()) {
+ vmlinux_lma = randomize_within_range(vmlinux.image_size + vmlinux.bss_size,
+ THREAD_SIZE, vmlinux.default_lma,
+ ident_map_size);
+ if (vmlinux_lma) {
+ __kaslr_offset = vmlinux_lma - vmlinux.default_lma;
+ offset_vmlinux_info(__kaslr_offset);
+ }
+ }
+ vmlinux_lma = vmlinux_lma ?: vmlinux.default_lma;
+ physmem_reserve(RR_VMLINUX, vmlinux_lma, vmlinux.image_size + vmlinux.bss_size);
+
+ if (!IS_ENABLED(CONFIG_KERNEL_UNCOMPRESSED)) {
+ img = decompress_kernel();
+ memmove((void *)vmlinux_lma, img, vmlinux.image_size);
+ } else if (__kaslr_offset) {
+ img = (void *)vmlinux.default_lma;
+ memmove((void *)vmlinux_lma, img, vmlinux.image_size);
+ memset(img, 0, vmlinux.image_size);
+ }
+
+ /* vmlinux decompression is done, shrink reserved low memory */
+ physmem_reserve(RR_DECOMPRESSOR, 0, (unsigned long)_decompressor_end);
+ if (kaslr_enabled())
+ amode31_lma = randomize_within_range(vmlinux.amode31_size, PAGE_SIZE, 0, SZ_2G);
+ amode31_lma = amode31_lma ?: vmlinux.default_lma - vmlinux.amode31_size;
+ physmem_reserve(RR_AMODE31, amode31_lma, vmlinux.amode31_size);
+
+ /*
+ * The order of the following operations is important:
+ *
+ * - handle_relocs() must follow clear_bss_section() to establish static
+ * memory references to data in .bss to be used by setup_vmem()
+ * (i.e init_mm.pgd)
+ *
+ * - setup_vmem() must follow handle_relocs() to be able using
+ * static memory references to data in .bss (i.e init_mm.pgd)
+ *
+ * - copy_bootdata() must follow setup_vmem() to propagate changes to
+ * bootdata made by setup_vmem()
+ */
+ clear_bss_section(vmlinux_lma);
+ handle_relocs(__kaslr_offset);
+ setup_vmem(asce_limit);
+ copy_bootdata();
+
+ /*
+ * 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 ? __kaslr_offset | 0x1UL : 0;
+
+ /*
+ * Jump to the decompressed kernel entry point and switch DAT mode on.
+ */
+ psw.addr = vmlinux.entry;
+ psw.mask = PSW_KERNEL_BITS;
+ __load_psw(psw);
+}
diff --git a/arch/s390/boot/string.c b/arch/s390/boot/string.c
new file mode 100644
index 0000000000..faccb33b46
--- /dev/null
+++ b/arch/s390/boot/string.c
@@ -0,0 +1,140 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/ctype.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#undef CONFIG_KASAN
+#undef CONFIG_KASAN_GENERIC
+#include "../lib/string.c"
+
+int strncmp(const char *cs, const char *ct, size_t count)
+{
+ unsigned char c1, c2;
+
+ while (count) {
+ c1 = *cs++;
+ c2 = *ct++;
+ if (c1 != c2)
+ return c1 < c2 ? -1 : 1;
+ if (!c1)
+ break;
+ count--;
+ }
+ return 0;
+}
+
+char *skip_spaces(const char *str)
+{
+ while (isspace(*str))
+ ++str;
+ return (char *)str;
+}
+
+char *strim(char *s)
+{
+ size_t size;
+ char *end;
+
+ size = strlen(s);
+ if (!size)
+ return s;
+
+ end = s + size - 1;
+ while (end >= s && isspace(*end))
+ end--;
+ *(end + 1) = '\0';
+
+ return skip_spaces(s);
+}
+
+/* Works only for digits and letters, but small and fast */
+#define TOLOWER(x) ((x) | 0x20)
+
+static unsigned int simple_guess_base(const char *cp)
+{
+ if (cp[0] == '0') {
+ if (TOLOWER(cp[1]) == 'x' && isxdigit(cp[2]))
+ return 16;
+ else
+ return 8;
+ } else {
+ return 10;
+ }
+}
+
+/**
+ * simple_strtoull - convert a string to an unsigned long long
+ * @cp: The start of the string
+ * @endp: A pointer to the end of the parsed string will be placed here
+ * @base: The number base to use
+ */
+
+unsigned long long simple_strtoull(const char *cp, char **endp,
+ unsigned int base)
+{
+ unsigned long long result = 0;
+
+ if (!base)
+ base = simple_guess_base(cp);
+
+ if (base == 16 && cp[0] == '0' && TOLOWER(cp[1]) == 'x')
+ cp += 2;
+
+ while (isxdigit(*cp)) {
+ unsigned int value;
+
+ value = isdigit(*cp) ? *cp - '0' : TOLOWER(*cp) - 'a' + 10;
+ if (value >= base)
+ break;
+ result = result * base + value;
+ cp++;
+ }
+ if (endp)
+ *endp = (char *)cp;
+
+ return result;
+}
+
+long simple_strtol(const char *cp, char **endp, unsigned int base)
+{
+ if (*cp == '-')
+ return -simple_strtoull(cp + 1, endp, base);
+
+ return simple_strtoull(cp, endp, base);
+}
+
+int kstrtobool(const char *s, bool *res)
+{
+ if (!s)
+ return -EINVAL;
+
+ switch (s[0]) {
+ case 'y':
+ case 'Y':
+ case '1':
+ *res = true;
+ return 0;
+ case 'n':
+ case 'N':
+ case '0':
+ *res = false;
+ return 0;
+ case 'o':
+ case 'O':
+ switch (s[1]) {
+ case 'n':
+ case 'N':
+ *res = true;
+ return 0;
+ case 'f':
+ case 'F':
+ *res = false;
+ return 0;
+ default:
+ break;
+ }
+ default:
+ break;
+ }
+
+ return -EINVAL;
+}
diff --git a/arch/s390/boot/uv.c b/arch/s390/boot/uv.c
new file mode 100644
index 0000000000..1e66d2cbb0
--- /dev/null
+++ b/arch/s390/boot/uv.c
@@ -0,0 +1,95 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <asm/uv.h>
+#include <asm/boot_data.h>
+#include <asm/facility.h>
+#include <asm/sections.h>
+
+#include "boot.h"
+#include "uv.h"
+
+/* will be used in arch/s390/kernel/uv.c */
+#ifdef CONFIG_PROTECTED_VIRTUALIZATION_GUEST
+int __bootdata_preserved(prot_virt_guest);
+#endif
+#if IS_ENABLED(CONFIG_KVM)
+int __bootdata_preserved(prot_virt_host);
+#endif
+struct uv_info __bootdata_preserved(uv_info);
+
+void uv_query_info(void)
+{
+ struct uv_cb_qui uvcb = {
+ .header.cmd = UVC_CMD_QUI,
+ .header.len = sizeof(uvcb)
+ };
+
+ if (!test_facility(158))
+ return;
+
+ /* rc==0x100 means that there is additional data we do not process */
+ if (uv_call(0, (uint64_t)&uvcb) && uvcb.header.rc != 0x100)
+ return;
+
+ if (IS_ENABLED(CONFIG_KVM)) {
+ memcpy(uv_info.inst_calls_list, uvcb.inst_calls_list, sizeof(uv_info.inst_calls_list));
+ uv_info.uv_base_stor_len = uvcb.uv_base_stor_len;
+ uv_info.guest_base_stor_len = uvcb.conf_base_phys_stor_len;
+ uv_info.guest_virt_base_stor_len = uvcb.conf_base_virt_stor_len;
+ uv_info.guest_virt_var_stor_len = uvcb.conf_virt_var_stor_len;
+ uv_info.guest_cpu_stor_len = uvcb.cpu_stor_len;
+ uv_info.max_sec_stor_addr = ALIGN(uvcb.max_guest_stor_addr, PAGE_SIZE);
+ uv_info.max_num_sec_conf = uvcb.max_num_sec_conf;
+ uv_info.max_guest_cpu_id = uvcb.max_guest_cpu_id;
+ uv_info.uv_feature_indications = uvcb.uv_feature_indications;
+ uv_info.supp_se_hdr_ver = uvcb.supp_se_hdr_versions;
+ uv_info.supp_se_hdr_pcf = uvcb.supp_se_hdr_pcf;
+ uv_info.conf_dump_storage_state_len = uvcb.conf_dump_storage_state_len;
+ uv_info.conf_dump_finalize_len = uvcb.conf_dump_finalize_len;
+ uv_info.supp_att_req_hdr_ver = uvcb.supp_att_req_hdr_ver;
+ uv_info.supp_att_pflags = uvcb.supp_att_pflags;
+ uv_info.supp_add_secret_req_ver = uvcb.supp_add_secret_req_ver;
+ uv_info.supp_add_secret_pcf = uvcb.supp_add_secret_pcf;
+ uv_info.supp_secret_types = uvcb.supp_secret_types;
+ uv_info.max_secrets = uvcb.max_secrets;
+ }
+
+#ifdef CONFIG_PROTECTED_VIRTUALIZATION_GUEST
+ if (test_bit_inv(BIT_UVC_CMD_SET_SHARED_ACCESS, (unsigned long *)uvcb.inst_calls_list) &&
+ test_bit_inv(BIT_UVC_CMD_REMOVE_SHARED_ACCESS, (unsigned long *)uvcb.inst_calls_list))
+ prot_virt_guest = 1;
+#endif
+}
+
+#if IS_ENABLED(CONFIG_KVM)
+unsigned long adjust_to_uv_max(unsigned long limit)
+{
+ if (is_prot_virt_host() && uv_info.max_sec_stor_addr)
+ limit = min_t(unsigned long, limit, uv_info.max_sec_stor_addr);
+ return limit;
+}
+
+static int is_prot_virt_host_capable(void)
+{
+ /* disable if no prot_virt=1 given on command-line */
+ if (!is_prot_virt_host())
+ return 0;
+ /* disable if protected guest virtualization is enabled */
+ if (is_prot_virt_guest())
+ return 0;
+ /* disable if no hardware support */
+ if (!test_facility(158))
+ return 0;
+ /* disable if kdump */
+ if (oldmem_data.start)
+ return 0;
+ /* disable if stand-alone dump */
+ if (ipl_block_valid && is_ipl_block_dump())
+ return 0;
+ return 1;
+}
+
+void sanitize_prot_virt_host(void)
+{
+ prot_virt_host = is_prot_virt_host_capable();
+}
+#endif
diff --git a/arch/s390/boot/uv.h b/arch/s390/boot/uv.h
new file mode 100644
index 0000000000..0f3070856f
--- /dev/null
+++ b/arch/s390/boot/uv.h
@@ -0,0 +1,22 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef BOOT_UV_H
+#define BOOT_UV_H
+
+#if IS_ENABLED(CONFIG_KVM)
+unsigned long adjust_to_uv_max(unsigned long limit);
+void sanitize_prot_virt_host(void);
+#else
+static inline unsigned long adjust_to_uv_max(unsigned long limit)
+{
+ return limit;
+}
+static inline void sanitize_prot_virt_host(void) {}
+#endif
+
+#if defined(CONFIG_PROTECTED_VIRTUALIZATION_GUEST) || IS_ENABLED(CONFIG_KVM)
+void uv_query_info(void);
+#else
+static inline void uv_query_info(void) {}
+#endif
+
+#endif /* BOOT_UV_H */
diff --git a/arch/s390/boot/version.c b/arch/s390/boot/version.c
new file mode 100644
index 0000000000..fd32f03877
--- /dev/null
+++ b/arch/s390/boot/version.c
@@ -0,0 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <generated/utsversion.h>
+#include <generated/utsrelease.h>
+#include <generated/compile.h>
+#include "boot.h"
+
+const char kernel_version[] = UTS_RELEASE
+ " (" LINUX_COMPILE_BY "@" LINUX_COMPILE_HOST ") " UTS_VERSION;
diff --git a/arch/s390/boot/vmem.c b/arch/s390/boot/vmem.c
new file mode 100644
index 0000000000..442a74f113
--- /dev/null
+++ b/arch/s390/boot/vmem.c
@@ -0,0 +1,458 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/sched/task.h>
+#include <linux/pgtable.h>
+#include <linux/kasan.h>
+#include <asm/pgalloc.h>
+#include <asm/facility.h>
+#include <asm/sections.h>
+#include <asm/physmem_info.h>
+#include <asm/maccess.h>
+#include <asm/abs_lowcore.h>
+#include "decompressor.h"
+#include "boot.h"
+
+unsigned long __bootdata_preserved(s390_invalid_asce);
+
+#ifdef CONFIG_PROC_FS
+atomic_long_t __bootdata_preserved(direct_pages_count[PG_DIRECT_MAP_MAX]);
+#endif
+
+#define init_mm (*(struct mm_struct *)vmlinux.init_mm_off)
+#define swapper_pg_dir vmlinux.swapper_pg_dir_off
+#define invalid_pg_dir vmlinux.invalid_pg_dir_off
+
+enum populate_mode {
+ POPULATE_NONE,
+ POPULATE_DIRECT,
+ POPULATE_ABS_LOWCORE,
+#ifdef CONFIG_KASAN
+ POPULATE_KASAN_MAP_SHADOW,
+ POPULATE_KASAN_ZERO_SHADOW,
+ POPULATE_KASAN_SHALLOW
+#endif
+};
+
+static void pgtable_populate(unsigned long addr, unsigned long end, enum populate_mode mode);
+
+#ifdef CONFIG_KASAN
+
+#define kasan_early_shadow_page vmlinux.kasan_early_shadow_page_off
+#define kasan_early_shadow_pte ((pte_t *)vmlinux.kasan_early_shadow_pte_off)
+#define kasan_early_shadow_pmd ((pmd_t *)vmlinux.kasan_early_shadow_pmd_off)
+#define kasan_early_shadow_pud ((pud_t *)vmlinux.kasan_early_shadow_pud_off)
+#define kasan_early_shadow_p4d ((p4d_t *)vmlinux.kasan_early_shadow_p4d_off)
+#define __sha(x) ((unsigned long)kasan_mem_to_shadow((void *)x))
+
+static pte_t pte_z;
+
+static inline void kasan_populate(unsigned long start, unsigned long end, enum populate_mode mode)
+{
+ start = PAGE_ALIGN_DOWN(__sha(start));
+ end = PAGE_ALIGN(__sha(end));
+ pgtable_populate(start, end, mode);
+}
+
+static void kasan_populate_shadow(void)
+{
+ pmd_t pmd_z = __pmd(__pa(kasan_early_shadow_pte) | _SEGMENT_ENTRY);
+ pud_t pud_z = __pud(__pa(kasan_early_shadow_pmd) | _REGION3_ENTRY);
+ p4d_t p4d_z = __p4d(__pa(kasan_early_shadow_pud) | _REGION2_ENTRY);
+ unsigned long memgap_start = 0;
+ unsigned long untracked_end;
+ unsigned long start, end;
+ int i;
+
+ pte_z = __pte(__pa(kasan_early_shadow_page) | pgprot_val(PAGE_KERNEL_RO));
+ if (!machine.has_nx)
+ pte_z = clear_pte_bit(pte_z, __pgprot(_PAGE_NOEXEC));
+ crst_table_init((unsigned long *)kasan_early_shadow_p4d, p4d_val(p4d_z));
+ crst_table_init((unsigned long *)kasan_early_shadow_pud, pud_val(pud_z));
+ crst_table_init((unsigned long *)kasan_early_shadow_pmd, pmd_val(pmd_z));
+ memset64((u64 *)kasan_early_shadow_pte, pte_val(pte_z), PTRS_PER_PTE);
+
+ /*
+ * Current memory layout:
+ * +- 0 -------------+ +- shadow start -+
+ * |1:1 ident mapping| /|1/8 of ident map|
+ * | | / | |
+ * +-end of ident map+ / +----------------+
+ * | ... gap ... | / | kasan |
+ * | | / | zero page |
+ * +- vmalloc area -+ / | mapping |
+ * | vmalloc_size | / | (untracked) |
+ * +- modules vaddr -+ / +----------------+
+ * | 2Gb |/ | unmapped | allocated per module
+ * +- shadow start -+ +----------------+
+ * | 1/8 addr space | | zero pg mapping| (untracked)
+ * +- shadow end ----+---------+- shadow end ---+
+ *
+ * Current memory layout (KASAN_VMALLOC):
+ * +- 0 -------------+ +- shadow start -+
+ * |1:1 ident mapping| /|1/8 of ident map|
+ * | | / | |
+ * +-end of ident map+ / +----------------+
+ * | ... gap ... | / | kasan zero page| (untracked)
+ * | | / | mapping |
+ * +- vmalloc area -+ / +----------------+
+ * | vmalloc_size | / |shallow populate|
+ * +- modules vaddr -+ / +----------------+
+ * | 2Gb |/ |shallow populate|
+ * +- shadow start -+ +----------------+
+ * | 1/8 addr space | | zero pg mapping| (untracked)
+ * +- shadow end ----+---------+- shadow end ---+
+ */
+
+ for_each_physmem_usable_range(i, &start, &end) {
+ kasan_populate(start, end, POPULATE_KASAN_MAP_SHADOW);
+ if (memgap_start && physmem_info.info_source == MEM_DETECT_DIAG260)
+ kasan_populate(memgap_start, start, POPULATE_KASAN_ZERO_SHADOW);
+ memgap_start = end;
+ }
+ if (IS_ENABLED(CONFIG_KASAN_VMALLOC)) {
+ untracked_end = VMALLOC_START;
+ /* shallowly populate kasan shadow for vmalloc and modules */
+ kasan_populate(VMALLOC_START, MODULES_END, POPULATE_KASAN_SHALLOW);
+ } else {
+ untracked_end = MODULES_VADDR;
+ }
+ /* populate kasan shadow for untracked memory */
+ kasan_populate(ident_map_size, untracked_end, POPULATE_KASAN_ZERO_SHADOW);
+ kasan_populate(MODULES_END, _REGION1_SIZE, POPULATE_KASAN_ZERO_SHADOW);
+}
+
+static bool kasan_pgd_populate_zero_shadow(pgd_t *pgd, unsigned long addr,
+ unsigned long end, enum populate_mode mode)
+{
+ if (mode == POPULATE_KASAN_ZERO_SHADOW &&
+ IS_ALIGNED(addr, PGDIR_SIZE) && end - addr >= PGDIR_SIZE) {
+ pgd_populate(&init_mm, pgd, kasan_early_shadow_p4d);
+ return true;
+ }
+ return false;
+}
+
+static bool kasan_p4d_populate_zero_shadow(p4d_t *p4d, unsigned long addr,
+ unsigned long end, enum populate_mode mode)
+{
+ if (mode == POPULATE_KASAN_ZERO_SHADOW &&
+ IS_ALIGNED(addr, P4D_SIZE) && end - addr >= P4D_SIZE) {
+ p4d_populate(&init_mm, p4d, kasan_early_shadow_pud);
+ return true;
+ }
+ return false;
+}
+
+static bool kasan_pud_populate_zero_shadow(pud_t *pud, unsigned long addr,
+ unsigned long end, enum populate_mode mode)
+{
+ if (mode == POPULATE_KASAN_ZERO_SHADOW &&
+ IS_ALIGNED(addr, PUD_SIZE) && end - addr >= PUD_SIZE) {
+ pud_populate(&init_mm, pud, kasan_early_shadow_pmd);
+ return true;
+ }
+ return false;
+}
+
+static bool kasan_pmd_populate_zero_shadow(pmd_t *pmd, unsigned long addr,
+ unsigned long end, enum populate_mode mode)
+{
+ if (mode == POPULATE_KASAN_ZERO_SHADOW &&
+ IS_ALIGNED(addr, PMD_SIZE) && end - addr >= PMD_SIZE) {
+ pmd_populate(&init_mm, pmd, kasan_early_shadow_pte);
+ return true;
+ }
+ return false;
+}
+
+static bool kasan_pte_populate_zero_shadow(pte_t *pte, enum populate_mode mode)
+{
+ pte_t entry;
+
+ if (mode == POPULATE_KASAN_ZERO_SHADOW) {
+ set_pte(pte, pte_z);
+ return true;
+ }
+ return false;
+}
+#else
+
+static inline void kasan_populate_shadow(void) {}
+
+static inline bool kasan_pgd_populate_zero_shadow(pgd_t *pgd, unsigned long addr,
+ unsigned long end, enum populate_mode mode)
+{
+ return false;
+}
+
+static inline bool kasan_p4d_populate_zero_shadow(p4d_t *p4d, unsigned long addr,
+ unsigned long end, enum populate_mode mode)
+{
+ return false;
+}
+
+static inline bool kasan_pud_populate_zero_shadow(pud_t *pud, unsigned long addr,
+ unsigned long end, enum populate_mode mode)
+{
+ return false;
+}
+
+static inline bool kasan_pmd_populate_zero_shadow(pmd_t *pmd, unsigned long addr,
+ unsigned long end, enum populate_mode mode)
+{
+ return false;
+}
+
+static bool kasan_pte_populate_zero_shadow(pte_t *pte, enum populate_mode mode)
+{
+ return false;
+}
+
+#endif
+
+/*
+ * Mimic virt_to_kpte() in lack of init_mm symbol. Skip pmd NULL check though.
+ */
+static inline pte_t *__virt_to_kpte(unsigned long va)
+{
+ return pte_offset_kernel(pmd_offset(pud_offset(p4d_offset(pgd_offset_k(va), va), va), va), va);
+}
+
+static void *boot_crst_alloc(unsigned long val)
+{
+ unsigned long size = PAGE_SIZE << CRST_ALLOC_ORDER;
+ unsigned long *table;
+
+ table = (unsigned long *)physmem_alloc_top_down(RR_VMEM, size, size);
+ crst_table_init(table, val);
+ return table;
+}
+
+static pte_t *boot_pte_alloc(void)
+{
+ static void *pte_leftover;
+ pte_t *pte;
+
+ /*
+ * handling pte_leftovers this way helps to avoid memory fragmentation
+ * during POPULATE_KASAN_MAP_SHADOW when EDAT is off
+ */
+ if (!pte_leftover) {
+ pte_leftover = (void *)physmem_alloc_top_down(RR_VMEM, PAGE_SIZE, PAGE_SIZE);
+ pte = pte_leftover + _PAGE_TABLE_SIZE;
+ } else {
+ pte = pte_leftover;
+ pte_leftover = NULL;
+ }
+
+ memset64((u64 *)pte, _PAGE_INVALID, PTRS_PER_PTE);
+ return pte;
+}
+
+static unsigned long _pa(unsigned long addr, unsigned long size, enum populate_mode mode)
+{
+ switch (mode) {
+ case POPULATE_NONE:
+ return -1;
+ case POPULATE_DIRECT:
+ return addr;
+ case POPULATE_ABS_LOWCORE:
+ return __abs_lowcore_pa(addr);
+#ifdef CONFIG_KASAN
+ case POPULATE_KASAN_MAP_SHADOW:
+ addr = physmem_alloc_top_down(RR_VMEM, size, size);
+ memset((void *)addr, 0, size);
+ return addr;
+#endif
+ default:
+ return -1;
+ }
+}
+
+static bool can_large_pud(pud_t *pu_dir, unsigned long addr, unsigned long end)
+{
+ return machine.has_edat2 &&
+ IS_ALIGNED(addr, PUD_SIZE) && (end - addr) >= PUD_SIZE;
+}
+
+static bool can_large_pmd(pmd_t *pm_dir, unsigned long addr, unsigned long end)
+{
+ return machine.has_edat1 &&
+ IS_ALIGNED(addr, PMD_SIZE) && (end - addr) >= PMD_SIZE;
+}
+
+static void pgtable_pte_populate(pmd_t *pmd, unsigned long addr, unsigned long end,
+ enum populate_mode mode)
+{
+ unsigned long pages = 0;
+ pte_t *pte, entry;
+
+ pte = pte_offset_kernel(pmd, addr);
+ for (; addr < end; addr += PAGE_SIZE, pte++) {
+ if (pte_none(*pte)) {
+ if (kasan_pte_populate_zero_shadow(pte, mode))
+ continue;
+ entry = __pte(_pa(addr, PAGE_SIZE, mode));
+ entry = set_pte_bit(entry, PAGE_KERNEL);
+ if (!machine.has_nx)
+ entry = clear_pte_bit(entry, __pgprot(_PAGE_NOEXEC));
+ set_pte(pte, entry);
+ pages++;
+ }
+ }
+ if (mode == POPULATE_DIRECT)
+ update_page_count(PG_DIRECT_MAP_4K, pages);
+}
+
+static void pgtable_pmd_populate(pud_t *pud, unsigned long addr, unsigned long end,
+ enum populate_mode mode)
+{
+ unsigned long next, pages = 0;
+ pmd_t *pmd, entry;
+ pte_t *pte;
+
+ pmd = pmd_offset(pud, addr);
+ for (; addr < end; addr = next, pmd++) {
+ next = pmd_addr_end(addr, end);
+ if (pmd_none(*pmd)) {
+ if (kasan_pmd_populate_zero_shadow(pmd, addr, next, mode))
+ continue;
+ if (can_large_pmd(pmd, addr, next)) {
+ entry = __pmd(_pa(addr, _SEGMENT_SIZE, mode));
+ entry = set_pmd_bit(entry, SEGMENT_KERNEL);
+ if (!machine.has_nx)
+ entry = clear_pmd_bit(entry, __pgprot(_SEGMENT_ENTRY_NOEXEC));
+ set_pmd(pmd, entry);
+ pages++;
+ continue;
+ }
+ pte = boot_pte_alloc();
+ pmd_populate(&init_mm, pmd, pte);
+ } else if (pmd_large(*pmd)) {
+ continue;
+ }
+ pgtable_pte_populate(pmd, addr, next, mode);
+ }
+ if (mode == POPULATE_DIRECT)
+ update_page_count(PG_DIRECT_MAP_1M, pages);
+}
+
+static void pgtable_pud_populate(p4d_t *p4d, unsigned long addr, unsigned long end,
+ enum populate_mode mode)
+{
+ unsigned long next, pages = 0;
+ pud_t *pud, entry;
+ pmd_t *pmd;
+
+ pud = pud_offset(p4d, addr);
+ for (; addr < end; addr = next, pud++) {
+ next = pud_addr_end(addr, end);
+ if (pud_none(*pud)) {
+ if (kasan_pud_populate_zero_shadow(pud, addr, next, mode))
+ continue;
+ if (can_large_pud(pud, addr, next)) {
+ entry = __pud(_pa(addr, _REGION3_SIZE, mode));
+ entry = set_pud_bit(entry, REGION3_KERNEL);
+ if (!machine.has_nx)
+ entry = clear_pud_bit(entry, __pgprot(_REGION_ENTRY_NOEXEC));
+ set_pud(pud, entry);
+ pages++;
+ continue;
+ }
+ pmd = boot_crst_alloc(_SEGMENT_ENTRY_EMPTY);
+ pud_populate(&init_mm, pud, pmd);
+ } else if (pud_large(*pud)) {
+ continue;
+ }
+ pgtable_pmd_populate(pud, addr, next, mode);
+ }
+ if (mode == POPULATE_DIRECT)
+ update_page_count(PG_DIRECT_MAP_2G, pages);
+}
+
+static void pgtable_p4d_populate(pgd_t *pgd, unsigned long addr, unsigned long end,
+ enum populate_mode mode)
+{
+ unsigned long next;
+ p4d_t *p4d;
+ pud_t *pud;
+
+ p4d = p4d_offset(pgd, addr);
+ for (; addr < end; addr = next, p4d++) {
+ next = p4d_addr_end(addr, end);
+ if (p4d_none(*p4d)) {
+ if (kasan_p4d_populate_zero_shadow(p4d, addr, next, mode))
+ continue;
+ pud = boot_crst_alloc(_REGION3_ENTRY_EMPTY);
+ p4d_populate(&init_mm, p4d, pud);
+ }
+ pgtable_pud_populate(p4d, addr, next, mode);
+ }
+}
+
+static void pgtable_populate(unsigned long addr, unsigned long end, enum populate_mode mode)
+{
+ unsigned long next;
+ pgd_t *pgd;
+ p4d_t *p4d;
+
+ pgd = pgd_offset(&init_mm, addr);
+ for (; addr < end; addr = next, pgd++) {
+ next = pgd_addr_end(addr, end);
+ if (pgd_none(*pgd)) {
+ if (kasan_pgd_populate_zero_shadow(pgd, addr, next, mode))
+ continue;
+ p4d = boot_crst_alloc(_REGION2_ENTRY_EMPTY);
+ pgd_populate(&init_mm, pgd, p4d);
+ }
+#ifdef CONFIG_KASAN
+ if (mode == POPULATE_KASAN_SHALLOW)
+ continue;
+#endif
+ pgtable_p4d_populate(pgd, addr, next, mode);
+ }
+}
+
+void setup_vmem(unsigned long asce_limit)
+{
+ unsigned long start, end;
+ unsigned long asce_type;
+ unsigned long asce_bits;
+ int i;
+
+ if (asce_limit == _REGION1_SIZE) {
+ asce_type = _REGION2_ENTRY_EMPTY;
+ asce_bits = _ASCE_TYPE_REGION2 | _ASCE_TABLE_LENGTH;
+ } else {
+ asce_type = _REGION3_ENTRY_EMPTY;
+ asce_bits = _ASCE_TYPE_REGION3 | _ASCE_TABLE_LENGTH;
+ }
+ s390_invalid_asce = invalid_pg_dir | _ASCE_TYPE_REGION3 | _ASCE_TABLE_LENGTH;
+
+ crst_table_init((unsigned long *)swapper_pg_dir, asce_type);
+ crst_table_init((unsigned long *)invalid_pg_dir, _REGION3_ENTRY_EMPTY);
+
+ /*
+ * To allow prefixing the lowcore must be mapped with 4KB pages.
+ * To prevent creation of a large page at address 0 first map
+ * the lowcore and create the identity mapping only afterwards.
+ */
+ pgtable_populate(0, sizeof(struct lowcore), POPULATE_DIRECT);
+ for_each_physmem_usable_range(i, &start, &end)
+ pgtable_populate(start, end, POPULATE_DIRECT);
+ pgtable_populate(__abs_lowcore, __abs_lowcore + sizeof(struct lowcore),
+ POPULATE_ABS_LOWCORE);
+ pgtable_populate(__memcpy_real_area, __memcpy_real_area + PAGE_SIZE,
+ POPULATE_NONE);
+ memcpy_real_ptep = __virt_to_kpte(__memcpy_real_area);
+
+ kasan_populate_shadow();
+
+ S390_lowcore.kernel_asce = swapper_pg_dir | asce_bits;
+ S390_lowcore.user_asce = s390_invalid_asce;
+
+ __ctl_load(S390_lowcore.kernel_asce, 1, 1);
+ __ctl_load(S390_lowcore.user_asce, 7, 7);
+ __ctl_load(S390_lowcore.kernel_asce, 13, 13);
+
+ init_mm.context.asce = S390_lowcore.kernel_asce;
+}
diff --git a/arch/s390/boot/vmlinux.lds.S b/arch/s390/boot/vmlinux.lds.S
new file mode 100644
index 0000000000..389df0e0d9
--- /dev/null
+++ b/arch/s390/boot/vmlinux.lds.S
@@ -0,0 +1,128 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#include <asm-generic/vmlinux.lds.h>
+#include <asm/vmlinux.lds.h>
+#include <asm/thread_info.h>
+#include <asm/page.h>
+#include <asm/sclp.h>
+#include "boot.h"
+
+OUTPUT_FORMAT("elf64-s390", "elf64-s390", "elf64-s390")
+OUTPUT_ARCH(s390:64-bit)
+
+ENTRY(startup)
+
+SECTIONS
+{
+ . = 0;
+ .ipldata : {
+ *(.ipldata)
+ }
+ . = IPL_START;
+ .head.text : {
+ _head = . ;
+ HEAD_TEXT
+ _ehead = . ;
+ }
+ . = PARMAREA;
+ .parmarea : {
+ *(.parmarea)
+ }
+ .text : {
+ _text = .; /* Text */
+ *(.text)
+ *(.text.*)
+ _etext = . ;
+ }
+ .rodata : {
+ _rodata = . ;
+ *(.rodata) /* read-only data */
+ *(.rodata.*)
+ _erodata = . ;
+ }
+ NOTES
+ .data : {
+ _data = . ;
+ *(.data)
+ *(.data.*)
+ _edata = . ;
+ }
+
+ BOOT_DATA
+ BOOT_DATA_PRESERVED
+
+ /*
+ * This is the BSS section of the decompressor and not of the decompressed Linux kernel.
+ * It will consume place in the decompressor's image.
+ */
+ . = ALIGN(8);
+ .bss : {
+ _bss = . ;
+ *(.bss)
+ *(.bss.*)
+ *(COMMON)
+ /*
+ * Stacks for the decompressor
+ */
+ . = ALIGN(PAGE_SIZE);
+ _dump_info_stack_start = .;
+ . += PAGE_SIZE;
+ _dump_info_stack_end = .;
+ . = ALIGN(PAGE_SIZE);
+ _stack_start = .;
+ . += BOOT_STACK_SIZE;
+ _stack_end = .;
+ _ebss = .;
+ }
+
+ /*
+ * uncompressed image info used by the decompressor it should match
+ * struct vmlinux_info. It comes from .vmlinux.info section of
+ * uncompressed vmlinux in a form of info.o
+ */
+ . = ALIGN(8);
+ .vmlinux.info : {
+ _vmlinux_info = .;
+ *(.vmlinux.info)
+ }
+
+ .decompressor.syms : {
+ . += 1; /* make sure we have \0 before the first entry */
+ . = ALIGN(2);
+ _decompressor_syms_start = .;
+ *(.decompressor.syms)
+ _decompressor_syms_end = .;
+ }
+
+ _decompressor_end = .;
+
+#ifdef CONFIG_KERNEL_UNCOMPRESSED
+ . = 0x100000;
+#else
+ . = ALIGN(8);
+#endif
+ .rodata.compressed : {
+ _compressed_start = .;
+ *(.vmlinux.bin.compressed)
+ _compressed_end = .;
+ }
+
+#define SB_TRAILER_SIZE 32
+ /* Trailer needed for Secure Boot */
+ . += SB_TRAILER_SIZE; /* make sure .sb.trailer does not overwrite the previous section */
+ . = ALIGN(4096) - SB_TRAILER_SIZE;
+ .sb.trailer : {
+ QUAD(0)
+ QUAD(0)
+ QUAD(0)
+ QUAD(0x000000207a49504c)
+ }
+ _end = .;
+
+ /* Sections to be discarded */
+ /DISCARD/ : {
+ *(.eh_frame)
+ *(__ex_table)
+ *(*__ksymtab*)
+ *(___kcrctab*)
+ }
+}