21 files changed, 316 insertions, 27 deletions

diff --git a/arch/s390/include/asm/appldata.h b/arch/s390/include/asm/appldata.h
index 4afbb5938726..c5bd9f4437e5 100644
--- a/arch/s390/include/asm/appldata.h
+++ b/arch/s390/include/asm/appldata.h
@@ -40,26 +40,27 @@ struct appldata_product_id {
 	u16  mod_lvl;		/* modification level */
 } __attribute__ ((packed));
 
-static inline int appldata_asm(struct appldata_product_id *id,
+
+static inline int appldata_asm(struct appldata_parameter_list *parm_list,
+			       struct appldata_product_id *id,
 			       unsigned short fn, void *buffer,
 			       unsigned short length)
 {
-	struct appldata_parameter_list parm_list;
 	int ry;
 
 	if (!MACHINE_IS_VM)
 		return -EOPNOTSUPP;
-	parm_list.diag = 0xdc;
-	parm_list.function = fn;
-	parm_list.parlist_length = sizeof(parm_list);
-	parm_list.buffer_length = length;
-	parm_list.product_id_addr = (unsigned long) id;
-	parm_list.buffer_addr = virt_to_phys(buffer);
+	parm_list->diag = 0xdc;
+	parm_list->function = fn;
+	parm_list->parlist_length = sizeof(*parm_list);
+	parm_list->buffer_length = length;
+	parm_list->product_id_addr = (unsigned long) id;
+	parm_list->buffer_addr = virt_to_phys(buffer);
 	diag_stat_inc(DIAG_STAT_X0DC);
 	asm volatile(
 		"	diag	%1,%0,0xdc"
 		: "=d" (ry)
-		: "d" (&parm_list), "m" (parm_list), "m" (*id)
+		: "d" (parm_list), "m" (*parm_list), "m" (*id)
 		: "cc");
 	return ry;
 }
diff --git a/arch/s390/include/asm/boot_data.h b/arch/s390/include/asm/boot_data.h
new file mode 100644
index 000000000000..2d999ccb977a
--- /dev/null
+++ b/arch/s390/include/asm/boot_data.h
@@ -0,0 +1,11 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _ASM_S390_BOOT_DATA_H
+
+#include <asm/setup.h>
+#include <asm/ipl.h>
+
+extern char early_command_line[COMMAND_LINE_SIZE];
+extern struct ipl_parameter_block early_ipl_block;
+extern int early_ipl_block_valid;
+
+#endif /* _ASM_S390_BOOT_DATA_H */
diff --git a/arch/s390/include/asm/ccwgroup.h b/arch/s390/include/asm/ccwgroup.h
index 860cab7479c3..7293c139dd79 100644
--- a/arch/s390/include/asm/ccwgroup.h
+++ b/arch/s390/include/asm/ccwgroup.h
@@ -64,6 +64,8 @@ extern int  ccwgroup_driver_register   (struct ccwgroup_driver *cdriver);
 extern void ccwgroup_driver_unregister (struct ccwgroup_driver *cdriver);
 int ccwgroup_create_dev(struct device *root, struct ccwgroup_driver *gdrv,
 			int num_devices, const char *buf);
+struct ccwgroup_device *get_ccwgroupdev_by_busid(struct ccwgroup_driver *gdrv,
+						 char *bus_id);
 
 extern int ccwgroup_set_online(struct ccwgroup_device *gdev);
 extern int ccwgroup_set_offline(struct ccwgroup_device *gdev);
diff --git a/arch/s390/include/asm/facility.h b/arch/s390/include/asm/facility.h
index 99c8ce30b3cd..e78cda94456b 100644
--- a/arch/s390/include/asm/facility.h
+++ b/arch/s390/include/asm/facility.h
@@ -64,11 +64,10 @@ static inline int test_facility(unsigned long nr)
  * @stfle_fac_list: array where facility list can be stored
  * @size: size of passed in array in double words
  */
-static inline void stfle(u64 *stfle_fac_list, int size)
+static inline void __stfle(u64 *stfle_fac_list, int size)
 {
 	unsigned long nr;
 
-	preempt_disable();
 	asm volatile(
 		"	stfl	0(0)\n"
 		: "=m" (S390_lowcore.stfl_fac_list));
@@ -85,6 +84,12 @@ static inline void stfle(u64 *stfle_fac_list, int size)
 		nr = (reg0 + 1) * 8; /* # bytes stored by stfle */
 	}
 	memset((char *) stfle_fac_list + nr, 0, size * 8 - nr);
+}
+
+static inline void stfle(u64 *stfle_fac_list, int size)
+{
+	preempt_disable();
+	__stfle(stfle_fac_list, size);
 	preempt_enable();
 }
 
diff --git a/arch/s390/include/asm/ipl.h b/arch/s390/include/asm/ipl.h
index ae5135704616..a8389e2d2f03 100644
--- a/arch/s390/include/asm/ipl.h
+++ b/arch/s390/include/asm/ipl.h
@@ -89,8 +89,8 @@ void __init save_area_add_vxrs(struct save_area *, __vector128 *vxrs);
 
 extern void s390_reset_system(void);
 extern void ipl_store_parameters(void);
-extern size_t append_ipl_vmparm(char *, size_t);
-extern size_t append_ipl_scpdata(char *, size_t);
+extern size_t ipl_block_get_ascii_vmparm(char *dest, size_t size,
+					 const struct ipl_parameter_block *ipb);
 
 enum ipl_type {
 	IPL_TYPE_UNKNOWN	= 1,
diff --git a/arch/s390/include/asm/kasan.h b/arch/s390/include/asm/kasan.h
new file mode 100644
index 000000000000..70930fe5c496
--- /dev/null
+++ b/arch/s390/include/asm/kasan.h
@@ -0,0 +1,30 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __ASM_KASAN_H
+#define __ASM_KASAN_H
+
+#include <asm/pgtable.h>
+
+#ifdef CONFIG_KASAN
+
+#define KASAN_SHADOW_SCALE_SHIFT 3
+#ifdef CONFIG_KASAN_S390_4_LEVEL_PAGING
+#define KASAN_SHADOW_SIZE						       \
+	(_AC(1, UL) << (_REGION1_SHIFT - KASAN_SHADOW_SCALE_SHIFT))
+#else
+#define KASAN_SHADOW_SIZE						       \
+	(_AC(1, UL) << (_REGION2_SHIFT - KASAN_SHADOW_SCALE_SHIFT))
+#endif
+#define KASAN_SHADOW_OFFSET	_AC(CONFIG_KASAN_SHADOW_OFFSET, UL)
+#define KASAN_SHADOW_START	KASAN_SHADOW_OFFSET
+#define KASAN_SHADOW_END	(KASAN_SHADOW_START + KASAN_SHADOW_SIZE)
+
+extern void kasan_early_init(void);
+extern void kasan_copy_shadow(pgd_t *dst);
+extern void kasan_free_early_identity(void);
+#else
+static inline void kasan_early_init(void) { }
+static inline void kasan_copy_shadow(pgd_t *dst) { }
+static inline void kasan_free_early_identity(void) { }
+#endif
+
+#endif
diff --git a/arch/s390/include/asm/lowcore.h b/arch/s390/include/asm/lowcore.h
index 406d940173ab..cc0947e08b6f 100644
--- a/arch/s390/include/asm/lowcore.h
+++ b/arch/s390/include/asm/lowcore.h
@@ -102,9 +102,9 @@ struct lowcore {
 	__u64	current_task;			/* 0x0338 */
 	__u64	kernel_stack;			/* 0x0340 */
 
-	/* Interrupt, panic and restart stack. */
+	/* Interrupt, DAT-off and restartstack. */
 	__u64	async_stack;			/* 0x0348 */
-	__u64	panic_stack;			/* 0x0350 */
+	__u64	nodat_stack;			/* 0x0350 */
 	__u64	restart_stack;			/* 0x0358 */
 
 	/* Restart function and parameter. */
diff --git a/arch/s390/include/asm/mem_detect.h b/arch/s390/include/asm/mem_detect.h
new file mode 100644
index 000000000000..6114b92ab667
--- /dev/null
+++ b/arch/s390/include/asm/mem_detect.h
@@ -0,0 +1,82 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _ASM_S390_MEM_DETECT_H
+#define _ASM_S390_MEM_DETECT_H
+
+#include <linux/types.h>
+
+enum mem_info_source {
+	MEM_DETECT_NONE = 0,
+	MEM_DETECT_SCLP_STOR_INFO,
+	MEM_DETECT_DIAG260,
+	MEM_DETECT_SCLP_READ_INFO,
+	MEM_DETECT_BIN_SEARCH
+};
+
+struct mem_detect_block {
+	u64 start;
+	u64 end;
+};
+
+/*
+ * Storage element id is defined as 1 byte (up to 256 storage elements).
+ * In practise only storage element id 0 and 1 are used).
+ * According to architecture one storage element could have as much as
+ * 1020 subincrements. 255 mem_detect_blocks are embedded in mem_detect_info.
+ * If more mem_detect_blocks are required, a block of memory from already
+ * known mem_detect_block is taken (entries_extended points to it).
+ */
+#define MEM_INLINED_ENTRIES 255 /* (PAGE_SIZE - 16) / 16 */
+
+struct mem_detect_info {
+	u32 count;
+	u8 info_source;
+	struct mem_detect_block entries[MEM_INLINED_ENTRIES];
+	struct mem_detect_block *entries_extended;
+};
+extern struct mem_detect_info mem_detect;
+
+void add_mem_detect_block(u64 start, u64 end);
+
+static inline int __get_mem_detect_block(u32 n, unsigned long *start,
+					 unsigned long *end)
+{
+	if (n >= mem_detect.count) {
+		*start = 0;
+		*end = 0;
+		return -1;
+	}
+
+	if (n < MEM_INLINED_ENTRIES) {
+		*start = (unsigned long)mem_detect.entries[n].start;
+		*end = (unsigned long)mem_detect.entries[n].end;
+	} else {
+		*start = (unsigned long)mem_detect.entries_extended[n - MEM_INLINED_ENTRIES].start;
+		*end = (unsigned long)mem_detect.entries_extended[n - MEM_INLINED_ENTRIES].end;
+	}
+	return 0;
+}
+
+/**
+ * for_each_mem_detect_block - early online memory range iterator
+ * @i: an integer used as loop variable
+ * @p_start: ptr to unsigned long for start address of the range
+ * @p_end: ptr to unsigned long for end address of the range
+ *
+ * Walks over detected online memory ranges.
+ */
+#define for_each_mem_detect_block(i, p_start, p_end)			\
+	for (i = 0, __get_mem_detect_block(i, p_start, p_end);		\
+	     i < mem_detect.count;					\
+	     i++, __get_mem_detect_block(i, p_start, p_end))
+
+static inline void get_mem_detect_reserved(unsigned long *start,
+					   unsigned long *size)
+{
+	*start = (unsigned long)mem_detect.entries_extended;
+	if (mem_detect.count > MEM_INLINED_ENTRIES)
+		*size = (mem_detect.count - MEM_INLINED_ENTRIES) * sizeof(struct mem_detect_block);
+	else
+		*size = 0;
+}
+
+#endif
diff --git a/arch/s390/include/asm/mmu.h b/arch/s390/include/asm/mmu.h
index a8418e1379eb..bcfb6371086f 100644
--- a/arch/s390/include/asm/mmu.h
+++ b/arch/s390/include/asm/mmu.h
@@ -32,6 +32,8 @@ typedef struct {
 	unsigned int uses_cmm:1;
 	/* The gmaps associated with this context are allowed to use huge pages. */
 	unsigned int allow_gmap_hpage_1m:1;
+	/* The mmu context is for compat task */
+	unsigned int compat_mm:1;
 } mm_context_t;
 
 #define INIT_MM_CONTEXT(name)						   \
diff --git a/arch/s390/include/asm/mmu_context.h b/arch/s390/include/asm/mmu_context.h
index 0717ee76885d..dbd689d556ce 100644
--- a/arch/s390/include/asm/mmu_context.h
+++ b/arch/s390/include/asm/mmu_context.h
@@ -25,6 +25,7 @@ static inline int init_new_context(struct task_struct *tsk,
 	atomic_set(&mm->context.flush_count, 0);
 	mm->context.gmap_asce = 0;
 	mm->context.flush_mm = 0;
+	mm->context.compat_mm = 0;
 #ifdef CONFIG_PGSTE
 	mm->context.alloc_pgste = page_table_allocate_pgste ||
 		test_thread_flag(TIF_PGSTE) ||
diff --git a/arch/s390/include/asm/page.h b/arch/s390/include/asm/page.h
index 41e3908b397f..a4d38092530a 100644
--- a/arch/s390/include/asm/page.h
+++ b/arch/s390/include/asm/page.h
@@ -161,6 +161,7 @@ static inline int devmem_is_allowed(unsigned long pfn)
 
 #define virt_to_pfn(kaddr)	(__pa(kaddr) >> PAGE_SHIFT)
 #define pfn_to_virt(pfn)	__va((pfn) << PAGE_SHIFT)
+#define pfn_to_kaddr(pfn)	pfn_to_virt(pfn)
 
 #define virt_to_page(kaddr)	pfn_to_page(virt_to_pfn(kaddr))
 #define page_to_virt(page)	pfn_to_virt(page_to_pfn(page))
diff --git a/arch/s390/include/asm/pgtable.h b/arch/s390/include/asm/pgtable.h
index 0e7cb0dc9c33..411d435e7a7d 100644
--- a/arch/s390/include/asm/pgtable.h
+++ b/arch/s390/include/asm/pgtable.h
@@ -341,6 +341,8 @@ static inline int is_module_addr(void *addr)
 #define PTRS_PER_P4D	_CRST_ENTRIES
 #define PTRS_PER_PGD	_CRST_ENTRIES
 
+#define MAX_PTRS_PER_P4D	PTRS_PER_P4D
+
 /*
  * Segment table and region3 table entry encoding
  * (R = read-only, I = invalid, y = young bit):
@@ -466,6 +468,12 @@ static inline int is_module_addr(void *addr)
 				 _SEGMENT_ENTRY_YOUNG |	\
 				 _SEGMENT_ENTRY_PROTECT | \
 				 _SEGMENT_ENTRY_NOEXEC)
+#define SEGMENT_KERNEL_EXEC __pgprot(_SEGMENT_ENTRY |	\
+				 _SEGMENT_ENTRY_LARGE |	\
+				 _SEGMENT_ENTRY_READ |	\
+				 _SEGMENT_ENTRY_WRITE | \
+				 _SEGMENT_ENTRY_YOUNG |	\
+				 _SEGMENT_ENTRY_DIRTY)
 
 /*
  * Region3 entry (large page) protection definitions.
@@ -599,6 +607,14 @@ static inline int pgd_bad(pgd_t pgd)
 	return (pgd_val(pgd) & mask) != 0;
 }
 
+static inline unsigned long pgd_pfn(pgd_t pgd)
+{
+	unsigned long origin_mask;
+
+	origin_mask = _REGION_ENTRY_ORIGIN;
+	return (pgd_val(pgd) & origin_mask) >> PAGE_SHIFT;
+}
+
 static inline int p4d_folded(p4d_t p4d)
 {
 	return (p4d_val(p4d) & _REGION_ENTRY_TYPE_MASK) < _REGION_ENTRY_TYPE_R2;
@@ -1171,6 +1187,7 @@ static inline pte_t mk_pte(struct page *page, pgprot_t pgprot)
 
 #define pgd_offset(mm, address) ((mm)->pgd + pgd_index(address))
 #define pgd_offset_k(address) pgd_offset(&init_mm, address)
+#define pgd_offset_raw(pgd, addr) ((pgd) + pgd_index(addr))
 
 #define pmd_deref(pmd) (pmd_val(pmd) & _SEGMENT_ENTRY_ORIGIN)
 #define pud_deref(pud) (pud_val(pud) & _REGION_ENTRY_ORIGIN)
@@ -1210,7 +1227,8 @@ static inline pmd_t *pmd_offset(pud_t *pud, unsigned long address)
 
 #define pmd_page(pmd) pfn_to_page(pmd_pfn(pmd))
 #define pud_page(pud) pfn_to_page(pud_pfn(pud))
-#define p4d_page(pud) pfn_to_page(p4d_pfn(p4d))
+#define p4d_page(p4d) pfn_to_page(p4d_pfn(p4d))
+#define pgd_page(pgd) pfn_to_page(pgd_pfn(pgd))
 
 /* Find an entry in the lowest level page table.. */
 #define pte_offset(pmd, addr) ((pte_t *) pmd_deref(*(pmd)) + pte_index(addr))
diff --git a/arch/s390/include/asm/pkey.h b/arch/s390/include/asm/pkey.h
index 053117ba7328..9b6e79077866 100644
--- a/arch/s390/include/asm/pkey.h
+++ b/arch/s390/include/asm/pkey.h
@@ -109,4 +109,30 @@ int pkey_verifykey(const struct pkey_seckey *seckey,
 		   u16 *pcardnr, u16 *pdomain,
 		   u16 *pkeysize, u32 *pattributes);
 
+/*
+ * In-kernel API: Generate (AES) random protected key.
+ * @param keytype one of the PKEY_KEYTYPE values
+ * @param protkey pointer to buffer receiving the protected key
+ * @return 0 on success, negative errno value on failure
+ */
+int pkey_genprotkey(__u32 keytype, struct pkey_protkey *protkey);
+
+/*
+ * In-kernel API: Verify an (AES) protected key.
+ * @param protkey pointer to buffer containing the protected key to verify
+ * @return 0 on success, negative errno value on failure. In case the protected
+ * key is not valid -EKEYREJECTED is returned
+ */
+int pkey_verifyprotkey(const struct pkey_protkey *protkey);
+
+/*
+ * In-kernel API: Transform an key blob (of any type) into a protected key.
+ * @param key pointer to a buffer containing the key blob
+ * @param keylen size of the key blob in bytes
+ * @param protkey pointer to buffer receiving the protected key
+ * @return 0 on success, negative errno value on failure
+ */
+int pkey_keyblob2pkey(const __u8 *key, __u32 keylen,
+		      struct pkey_protkey *protkey);
+
 #endif /* _KAPI_PKEY_H */
diff --git a/arch/s390/include/asm/processor.h b/arch/s390/include/asm/processor.h
index 7f2953c15c37..34768e6ef4fb 100644
--- a/arch/s390/include/asm/processor.h
+++ b/arch/s390/include/asm/processor.h
@@ -242,7 +242,7 @@ static inline unsigned long current_stack_pointer(void)
 	return sp;
 }
 
-static inline unsigned short stap(void)
+static __no_sanitize_address_or_inline unsigned short stap(void)
 {
 	unsigned short cpu_address;
 
@@ -250,6 +250,55 @@ static inline unsigned short stap(void)
 	return cpu_address;
 }
 
+#define CALL_ARGS_0()							\
+	register unsigned long r2 asm("2")
+#define CALL_ARGS_1(arg1)						\
+	register unsigned long r2 asm("2") = (unsigned long)(arg1)
+#define CALL_ARGS_2(arg1, arg2)						\
+	CALL_ARGS_1(arg1);						\
+	register unsigned long r3 asm("3") = (unsigned long)(arg2)
+#define CALL_ARGS_3(arg1, arg2, arg3)					\
+	CALL_ARGS_2(arg1, arg2);					\
+	register unsigned long r4 asm("4") = (unsigned long)(arg3)
+#define CALL_ARGS_4(arg1, arg2, arg3, arg4)				\
+	CALL_ARGS_3(arg1, arg2, arg3);					\
+	register unsigned long r4 asm("5") = (unsigned long)(arg4)
+#define CALL_ARGS_5(arg1, arg2, arg3, arg4, arg5)			\
+	CALL_ARGS_4(arg1, arg2, arg3, arg4);				\
+	register unsigned long r4 asm("6") = (unsigned long)(arg5)
+
+#define CALL_FMT_0
+#define CALL_FMT_1 CALL_FMT_0, "0" (r2)
+#define CALL_FMT_2 CALL_FMT_1, "d" (r3)
+#define CALL_FMT_3 CALL_FMT_2, "d" (r4)
+#define CALL_FMT_4 CALL_FMT_3, "d" (r5)
+#define CALL_FMT_5 CALL_FMT_4, "d" (r6)
+
+#define CALL_CLOBBER_5 "0", "1", "14", "cc", "memory"
+#define CALL_CLOBBER_4 CALL_CLOBBER_5
+#define CALL_CLOBBER_3 CALL_CLOBBER_4, "5"
+#define CALL_CLOBBER_2 CALL_CLOBBER_3, "4"
+#define CALL_CLOBBER_1 CALL_CLOBBER_2, "3"
+#define CALL_CLOBBER_0 CALL_CLOBBER_1
+
+#define CALL_ON_STACK(fn, stack, nr, args...)				\
+({									\
+	CALL_ARGS_##nr(args);						\
+	unsigned long prev;						\
+									\
+	asm volatile(							\
+		"	la	%[_prev],0(15)\n"			\
+		"	la	15,0(%[_stack])\n"			\
+		"	stg	%[_prev],%[_bc](15)\n"			\
+		"	brasl	14,%[_fn]\n"				\
+		"	la	15,0(%[_prev])\n"			\
+		: "+&d" (r2), [_prev] "=&a" (prev)			\
+		: [_stack] "a" (stack),					\
+		  [_bc] "i" (offsetof(struct stack_frame, back_chain)),	\
+		  [_fn] "X" (fn) CALL_FMT_##nr : CALL_CLOBBER_##nr);	\
+	r2;								\
+})
+
 /*
  * Give up the time slice of the virtual PU.
  */
@@ -287,7 +336,7 @@ static inline void __load_psw(psw_t psw)
  * Set PSW mask to specified value, while leaving the
  * PSW addr pointing to the next instruction.
  */
-static inline void __load_psw_mask(unsigned long mask)
+static __no_sanitize_address_or_inline void __load_psw_mask(unsigned long mask)
 {
 	unsigned long addr;
 	psw_t psw;
diff --git a/arch/s390/include/asm/qdio.h b/arch/s390/include/asm/qdio.h
index 9c9970a5dfb1..d46edde7e458 100644
--- a/arch/s390/include/asm/qdio.h
+++ b/arch/s390/include/asm/qdio.h
@@ -252,13 +252,11 @@ struct slsb {
  *   (for communication with upper layer programs)
  *   (only required for use with completion queues)
  * @flags: flags indicating state of buffer
- * @aob: pointer to QAOB used for the particular SBAL
  * @user: pointer to upper layer program's state information related to SBAL
  *        (stored in user1 data of QAOB)
  */
 struct qdio_outbuf_state {
 	u8 flags;
-	struct qaob *aob;
 	void *user;
 };
 
diff --git a/arch/s390/include/asm/sclp.h b/arch/s390/include/asm/sclp.h
index 3cae9168f63c..0cd4bda85eb1 100644
--- a/arch/s390/include/asm/sclp.h
+++ b/arch/s390/include/asm/sclp.h
@@ -95,6 +95,7 @@ extern struct sclp_info sclp;
 struct zpci_report_error_header {
 	u8 version;	/* Interface version byte */
 	u8 action;	/* Action qualifier byte
+			 * 0: Adapter Reset Request
 			 * 1: Deconfigure and repair action requested
 			 *	(OpenCrypto Problem Call Home)
 			 * 2: Informational Report
@@ -104,12 +105,17 @@ struct zpci_report_error_header {
 	u8 data[0];	/* Subsequent Data passed verbatim to SCLP ET 24 */
 } __packed;
 
+int sclp_early_read_info(void);
+int sclp_early_read_storage_info(void);
 int sclp_early_get_core_info(struct sclp_core_info *info);
 void sclp_early_get_ipl_info(struct sclp_ipl_info *info);
 void sclp_early_detect(void);
 void sclp_early_printk(const char *s);
-void __sclp_early_printk(const char *s, unsigned int len);
+void sclp_early_printk_force(const char *s);
+void __sclp_early_printk(const char *s, unsigned int len, unsigned int force);
 
+int sclp_early_get_memsize(unsigned long *mem);
+int sclp_early_get_hsa_size(unsigned long *hsa_size);
 int _sclp_get_core_info(struct sclp_core_info *info);
 int sclp_core_configure(u8 core);
 int sclp_core_deconfigure(u8 core);
diff --git a/arch/s390/include/asm/sections.h b/arch/s390/include/asm/sections.h
index 724faede8ac5..7afe4620685c 100644
--- a/arch/s390/include/asm/sections.h
+++ b/arch/s390/include/asm/sections.h
@@ -4,4 +4,16 @@
 
 #include <asm-generic/sections.h>
 
+/*
+ * .boot.data section contains variables "shared" between the decompressor and
+ * the decompressed kernel. The decompressor will store values in them, and
+ * copy over to the decompressed image before starting it.
+ *
+ * Each variable end up in its own intermediate section .boot.data.<var name>,
+ * those sections are later sorted by alignment + name and merged together into
+ * final .boot.data section, which should be identical in the decompressor and
+ * the decompressed kernel (that is checked during the build).
+ */
+#define __bootdata(var) __section(.boot.data.var) var
+
 #endif
diff --git a/arch/s390/include/asm/setup.h b/arch/s390/include/asm/setup.h
index 1d66016f4170..efda97804aa4 100644
--- a/arch/s390/include/asm/setup.h
+++ b/arch/s390/include/asm/setup.h
@@ -65,12 +65,11 @@
 #define OLDMEM_SIZE	(*(unsigned long *)  (OLDMEM_SIZE_OFFSET))
 #define COMMAND_LINE	((char *)	     (COMMAND_LINE_OFFSET))
 
+extern int noexec_disabled;
 extern int memory_end_set;
 extern unsigned long memory_end;
 extern unsigned long max_physmem_end;
 
-extern void detect_memory_memblock(void);
-
 #define MACHINE_IS_VM		(S390_lowcore.machine_flags & MACHINE_FLAG_VM)
 #define MACHINE_IS_KVM		(S390_lowcore.machine_flags & MACHINE_FLAG_KVM)
 #define MACHINE_IS_LPAR		(S390_lowcore.machine_flags & MACHINE_FLAG_LPAR)
diff --git a/arch/s390/include/asm/string.h b/arch/s390/include/asm/string.h
index 50f26fc9acb2..116cc15a4b8a 100644
--- a/arch/s390/include/asm/string.h
+++ b/arch/s390/include/asm/string.h
@@ -53,6 +53,27 @@ char *strstr(const char *s1, const char *s2);
 #undef __HAVE_ARCH_STRSEP
 #undef __HAVE_ARCH_STRSPN
 
+#if defined(CONFIG_KASAN) && !defined(__SANITIZE_ADDRESS__)
+
+extern void *__memcpy(void *dest, const void *src, size_t n);
+extern void *__memset(void *s, int c, size_t n);
+extern void *__memmove(void *dest, const void *src, size_t n);
+
+/*
+ * For files that are not instrumented (e.g. mm/slub.c) we
+ * should use not instrumented version of mem* functions.
+ */
+
+#define memcpy(dst, src, len) __memcpy(dst, src, len)
+#define memmove(dst, src, len) __memmove(dst, src, len)
+#define memset(s, c, n) __memset(s, c, n)
+
+#ifndef __NO_FORTIFY
+#define __NO_FORTIFY /* FORTIFY_SOURCE uses __builtin_memcpy, etc. */
+#endif
+
+#endif /* defined(CONFIG_KASAN) && !defined(__SANITIZE_ADDRESS__) */
+
 void *__memset16(uint16_t *s, uint16_t v, size_t count);
 void *__memset32(uint32_t *s, uint32_t v, size_t count);
 void *__memset64(uint64_t *s, uint64_t v, size_t count);
diff --git a/arch/s390/include/asm/thread_info.h b/arch/s390/include/asm/thread_info.h
index 3c883c368eb0..27248f42a03c 100644
--- a/arch/s390/include/asm/thread_info.h
+++ b/arch/s390/include/asm/thread_info.h
@@ -11,19 +11,24 @@
 #include <linux/const.h>
 
 /*
- * Size of kernel stack for each process
+ * General size of kernel stacks
  */
+#ifdef CONFIG_KASAN
+#define THREAD_SIZE_ORDER 3
+#else
 #define THREAD_SIZE_ORDER 2
-#define ASYNC_ORDER  2
-
+#endif
+#define BOOT_STACK_ORDER  2
 #define THREAD_SIZE (PAGE_SIZE << THREAD_SIZE_ORDER)
-#define ASYNC_SIZE  (PAGE_SIZE << ASYNC_ORDER)
 
 #ifndef __ASSEMBLY__
 #include <asm/lowcore.h>
 #include <asm/page.h>
 #include <asm/processor.h>
 
+#define STACK_INIT_OFFSET \
+	(THREAD_SIZE - STACK_FRAME_OVERHEAD - sizeof(struct pt_regs))
+
 /*
  * low level task data that entry.S needs immediate access to
  * - this struct should fit entirely inside of one cache line
diff --git a/arch/s390/include/asm/vmlinux.lds.h b/arch/s390/include/asm/vmlinux.lds.h
new file mode 100644
index 000000000000..2d127f900352
--- /dev/null
+++ b/arch/s390/include/asm/vmlinux.lds.h
@@ -0,0 +1,20 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#include <asm/page.h>
+
+/*
+ * .boot.data section is shared between the decompressor code and the
+ * decompressed kernel. The decompressor will store values in it, and copy
+ * over to the decompressed image before starting it.
+ *
+ * .boot.data variables are kept in separate .boot.data.<var name> sections,
+ * which are sorted by alignment first, then by name before being merged
+ * into single .boot.data section. This way big holes cased by page aligned
+ * structs are avoided and linker produces consistent result.
+ */
+#define BOOT_DATA							\
+	. = ALIGN(PAGE_SIZE);						\
+	.boot.data : {							\
+		__boot_data_start = .;					\
+		*(SORT_BY_ALIGNMENT(SORT_BY_NAME(.boot.data*)))		\
+		__boot_data_end = .;					\
+	}