17 files changed, 102 insertions, 201 deletions

diff --git a/arch/s390/kernel/debug.c b/arch/s390/kernel/debug.c
index b376f0377a2c..221c865785c2 100644
--- a/arch/s390/kernel/debug.c
+++ b/arch/s390/kernel/debug.c
@@ -981,16 +981,6 @@ static struct ctl_table s390dbf_table[] = {
 	{ }
 };
 
-static struct ctl_table s390dbf_dir_table[] = {
-	{
-		.procname	= "s390dbf",
-		.maxlen		= 0,
-		.mode		= S_IRUGO | S_IXUGO,
-		.child		= s390dbf_table,
-	},
-	{ }
-};
-
 static struct ctl_table_header *s390dbf_sysctl_header;
 
 /**
@@ -1574,7 +1564,7 @@ out:
  */
 static int __init debug_init(void)
 {
-	s390dbf_sysctl_header = register_sysctl_table(s390dbf_dir_table);
+	s390dbf_sysctl_header = register_sysctl("s390dbf", s390dbf_table);
 	mutex_lock(&debug_mutex);
 	debug_debugfs_root_entry = debugfs_create_dir(DEBUG_DIR_ROOT, NULL);
 	initialized = 1;
diff --git a/arch/s390/kernel/dumpstack.c b/arch/s390/kernel/dumpstack.c
index 1e3233eb510a..f257058d0828 100644
--- a/arch/s390/kernel/dumpstack.c
+++ b/arch/s390/kernel/dumpstack.c
@@ -152,7 +152,13 @@ void show_stack(struct task_struct *task, unsigned long *stack,
 static void show_last_breaking_event(struct pt_regs *regs)
 {
 	printk("Last Breaking-Event-Address:\n");
-	printk(" [<%016lx>] %pSR\n", regs->last_break, (void *)regs->last_break);
+	printk(" [<%016lx>] ", regs->last_break);
+	if (user_mode(regs)) {
+		print_vma_addr(KERN_CONT, regs->last_break);
+		pr_cont("\n");
+	} else {
+		pr_cont("%pSR\n", (void *)regs->last_break);
+	}
 }
 
 void show_registers(struct pt_regs *regs)
diff --git a/arch/s390/kernel/early.c b/arch/s390/kernel/early.c
index d26f02495636..2dd5976a55ac 100644
--- a/arch/s390/kernel/early.c
+++ b/arch/s390/kernel/early.c
@@ -34,8 +34,6 @@
 #include <asm/switch_to.h>
 #include "entry.h"
 
-int __bootdata(is_full_image);
-
 #define decompressor_handled_param(param)			\
 static int __init ignore_decompressor_param_##param(char *s)	\
 {								\
@@ -53,6 +51,14 @@ decompressor_handled_param(nokaslr);
 decompressor_handled_param(prot_virt);
 #endif
 
+static void __init kasan_early_init(void)
+{
+#ifdef CONFIG_KASAN
+	init_task.kasan_depth = 0;
+	sclp_early_printk("KernelAddressSanitizer initialized\n");
+#endif
+}
+
 static void __init reset_tod_clock(void)
 {
 	union tod_clock clk;
@@ -288,17 +294,6 @@ static void __init setup_boot_command_line(void)
 	strscpy(boot_command_line, early_command_line, COMMAND_LINE_SIZE);
 }
 
-static void __init check_image_bootable(void)
-{
-	if (is_full_image)
-		return;
-
-	sclp_early_printk("Linux kernel boot failure: An attempt to boot a vmlinux ELF image failed.\n");
-	sclp_early_printk("This image does not contain all parts necessary for starting up. Use\n");
-	sclp_early_printk("bzImage or arch/s390/boot/compressed/vmlinux instead.\n");
-	disabled_wait();
-}
-
 static void __init sort_amode31_extable(void)
 {
 	sort_extable(__start_amode31_ex_table, __stop_amode31_ex_table);
@@ -306,8 +301,8 @@ static void __init sort_amode31_extable(void)
 
 void __init startup_init(void)
 {
+	kasan_early_init();
 	reset_tod_clock();
-	check_image_bootable();
 	time_early_init();
 	init_kernel_storage_key();
 	lockdep_off();
diff --git a/arch/s390/kernel/entry.S b/arch/s390/kernel/entry.S
index 76a06f3d3671..58b85aedca22 100644
--- a/arch/s390/kernel/entry.S
+++ b/arch/s390/kernel/entry.S
@@ -159,21 +159,15 @@ _LPP_OFFSET	= __LC_LPP
 	.section .kprobes.text, "ax"
 .Ldummy:
 	/*
-	 * This nop exists only in order to avoid that __bpon starts at
-	 * the beginning of the kprobes text section. In that case we would
-	 * have several symbols at the same address. E.g. objdump would take
-	 * an arbitrary symbol name when disassembling this code.
-	 * With the added nop in between the __bpon symbol is unique
-	 * again.
+	 * The following nop exists only in order to avoid that the next
+	 * symbol starts at the beginning of the kprobes text section.
+	 * In that case there would be several symbols at the same address.
+	 * E.g. objdump would take an arbitrary symbol when disassembling
+	 * the code.
+	 * With the added nop in between this cannot happen.
 	 */
 	nop	0
 
-ENTRY(__bpon)
-	.globl __bpon
-	BPON
-	BR_EX	%r14
-ENDPROC(__bpon)
-
 /*
  * Scheduler resume function, called by switch_to
  *  gpr2 = (task_struct *) prev
@@ -227,7 +221,7 @@ ENTRY(__sie64a)
 	TSTMSK	__LC_CPU_FLAGS,_CIF_FPU
 	jo	.Lsie_skip			# exit if fp/vx regs changed
 	lg	%r14,__SF_SIE_CONTROL_PHYS(%r15)	# get sie block phys addr
-	BPEXIT	__SF_SIE_FLAGS(%r15),(_TIF_ISOLATE_BP|_TIF_ISOLATE_BP_GUEST)
+	BPEXIT	__SF_SIE_FLAGS(%r15),_TIF_ISOLATE_BP_GUEST
 .Lsie_entry:
 	sie	0(%r14)
 # Let the next instruction be NOP to avoid triggering a machine check
@@ -235,7 +229,7 @@ ENTRY(__sie64a)
 	nopr	7
 .Lsie_leave:
 	BPOFF
-	BPENTER	__SF_SIE_FLAGS(%r15),(_TIF_ISOLATE_BP|_TIF_ISOLATE_BP_GUEST)
+	BPENTER	__SF_SIE_FLAGS(%r15),_TIF_ISOLATE_BP_GUEST
 .Lsie_skip:
 	lg	%r14,__SF_SIE_CONTROL(%r15)	# get control block pointer
 	ni	__SIE_PROG0C+3(%r14),0xfe	# no longer in SIE
@@ -291,11 +285,9 @@ ENTRY(system_call)
 .Lsysc_per:
 	STBEAR	__LC_LAST_BREAK
 	lctlg	%c1,%c1,__LC_KERNEL_ASCE
-	lg	%r12,__LC_CURRENT
 	lg	%r15,__LC_KERNEL_STACK
 	xc	__SF_BACKCHAIN(8,%r15),__SF_BACKCHAIN(%r15)
 	stmg	%r0,%r7,STACK_FRAME_OVERHEAD+__PT_R0(%r15)
-	BPENTER __TI_flags(%r12),_TIF_ISOLATE_BP
 	# clear user controlled register to prevent speculative use
 	xgr	%r0,%r0
 	xgr	%r1,%r1
@@ -314,7 +306,7 @@ ENTRY(system_call)
 	brasl	%r14,__do_syscall
 	lctlg	%c1,%c1,__LC_USER_ASCE
 	mvc	__LC_RETURN_PSW(16),STACK_FRAME_OVERHEAD+__PT_PSW(%r15)
-	BPEXIT __TI_flags(%r12),_TIF_ISOLATE_BP
+	BPON
 	LBEAR	STACK_FRAME_OVERHEAD+__PT_LAST_BREAK(%r15)
 	lmg	%r0,%r15,STACK_FRAME_OVERHEAD+__PT_R0(%r15)
 	stpt	__LC_EXIT_TIMER
@@ -329,7 +321,7 @@ ENTRY(ret_from_fork)
 	brasl	%r14,__ret_from_fork
 	lctlg	%c1,%c1,__LC_USER_ASCE
 	mvc	__LC_RETURN_PSW(16),STACK_FRAME_OVERHEAD+__PT_PSW(%r15)
-	BPEXIT __TI_flags(%r12),_TIF_ISOLATE_BP
+	BPON
 	LBEAR	STACK_FRAME_OVERHEAD+__PT_LAST_BREAK(%r15)
 	lmg	%r0,%r15,STACK_FRAME_OVERHEAD+__PT_R0(%r15)
 	stpt	__LC_EXIT_TIMER
@@ -344,7 +336,6 @@ ENTRY(pgm_check_handler)
 	stpt	__LC_SYS_ENTER_TIMER
 	BPOFF
 	stmg	%r8,%r15,__LC_SAVE_AREA_SYNC
-	lg	%r12,__LC_CURRENT
 	lghi	%r10,0
 	lmg	%r8,%r9,__LC_PGM_OLD_PSW
 	tmhh	%r8,0x0001		# coming from user space?
@@ -355,6 +346,7 @@ ENTRY(pgm_check_handler)
 #if IS_ENABLED(CONFIG_KVM)
 	# cleanup critical section for program checks in __sie64a
 	OUTSIDE	%r9,.Lsie_gmap,.Lsie_done,1f
+	BPENTER	__SF_SIE_FLAGS(%r15),_TIF_ISOLATE_BP_GUEST
 	SIEEXIT
 	lghi	%r10,_PIF_GUEST_FAULT
 #endif
@@ -366,8 +358,7 @@ ENTRY(pgm_check_handler)
 	aghi	%r15,-(STACK_FRAME_OVERHEAD + __PT_SIZE)
 	# CHECK_VMAP_STACK branches to stack_overflow or 4f
 	CHECK_VMAP_STACK __LC_SAVE_AREA_SYNC,4f
-3:	BPENTER __TI_flags(%r12),_TIF_ISOLATE_BP
-	lg	%r15,__LC_KERNEL_STACK
+3:	lg	%r15,__LC_KERNEL_STACK
 4:	la	%r11,STACK_FRAME_OVERHEAD(%r15)
 	stg	%r10,__PT_FLAGS(%r11)
 	xc	__SF_BACKCHAIN(8,%r15),__SF_BACKCHAIN(%r15)
@@ -389,7 +380,7 @@ ENTRY(pgm_check_handler)
 	tmhh	%r8,0x0001		# returning to user space?
 	jno	.Lpgm_exit_kernel
 	lctlg	%c1,%c1,__LC_USER_ASCE
-	BPEXIT __TI_flags(%r12),_TIF_ISOLATE_BP
+	BPON
 	stpt	__LC_EXIT_TIMER
 .Lpgm_exit_kernel:
 	mvc	__LC_RETURN_PSW(16),STACK_FRAME_OVERHEAD+__PT_PSW(%r15)
@@ -419,20 +410,18 @@ ENTRY(\name)
 	STBEAR	__LC_LAST_BREAK
 	BPOFF
 	stmg	%r8,%r15,__LC_SAVE_AREA_ASYNC
-	lg	%r12,__LC_CURRENT
 	lmg	%r8,%r9,\lc_old_psw
 	tmhh	%r8,0x0001			# interrupting from user ?
 	jnz	1f
 #if IS_ENABLED(CONFIG_KVM)
 	OUTSIDE	%r9,.Lsie_gmap,.Lsie_done,0f
-	BPENTER	__SF_SIE_FLAGS(%r15),(_TIF_ISOLATE_BP|_TIF_ISOLATE_BP_GUEST)
+	BPENTER	__SF_SIE_FLAGS(%r15),_TIF_ISOLATE_BP_GUEST
 	SIEEXIT
 #endif
 0:	CHECK_STACK __LC_SAVE_AREA_ASYNC
 	aghi	%r15,-(STACK_FRAME_OVERHEAD + __PT_SIZE)
 	j	2f
-1:	BPENTER __TI_flags(%r12),_TIF_ISOLATE_BP
-	lctlg	%c1,%c1,__LC_KERNEL_ASCE
+1:	lctlg	%c1,%c1,__LC_KERNEL_ASCE
 	lg	%r15,__LC_KERNEL_STACK
 2:	xc	__SF_BACKCHAIN(8,%r15),__SF_BACKCHAIN(%r15)
 	la	%r11,STACK_FRAME_OVERHEAD(%r15)
@@ -456,7 +445,7 @@ ENTRY(\name)
 	tmhh	%r8,0x0001		# returning to user ?
 	jno	2f
 	lctlg	%c1,%c1,__LC_USER_ASCE
-	BPEXIT	__TI_flags(%r12),_TIF_ISOLATE_BP
+	BPON
 	stpt	__LC_EXIT_TIMER
 2:	LBEAR	__PT_LAST_BREAK(%r11)
 	lmg	%r0,%r15,__PT_R0(%r11)
@@ -501,7 +490,6 @@ ENTRY(mcck_int_handler)
 	spt	__LC_CPU_TIMER_SAVE_AREA-4095(%r1)	# validate cpu timer
 	LBEAR	__LC_LAST_BREAK_SAVE_AREA-4095(%r1)		# validate bear
 	lmg	%r0,%r15,__LC_GPREGS_SAVE_AREA-4095(%r1)# validate gprs
-	lg	%r12,__LC_CURRENT
 	lmg	%r8,%r9,__LC_MCK_OLD_PSW
 	TSTMSK	__LC_MCCK_CODE,MCCK_CODE_SYSTEM_DAMAGE
 	jo	.Lmcck_panic		# yes -> rest of mcck code invalid
@@ -530,16 +518,13 @@ ENTRY(mcck_int_handler)
 	TSTMSK	__LC_MCCK_CODE,MCCK_CODE_PSW_IA_VALID
 	jno	.Lmcck_panic
 #if IS_ENABLED(CONFIG_KVM)
-	OUTSIDE	%r9,.Lsie_gmap,.Lsie_done,.Lmcck_stack
+	OUTSIDE	%r9,.Lsie_gmap,.Lsie_done,.Lmcck_user
 	OUTSIDE	%r9,.Lsie_entry,.Lsie_leave,4f
 	oi	__LC_CPU_FLAGS+7, _CIF_MCCK_GUEST
-4:	BPENTER	__SF_SIE_FLAGS(%r15),(_TIF_ISOLATE_BP|_TIF_ISOLATE_BP_GUEST)
+4:	BPENTER	__SF_SIE_FLAGS(%r15),_TIF_ISOLATE_BP_GUEST
 	SIEEXIT
-	j	.Lmcck_stack
 #endif
 .Lmcck_user:
-	BPENTER __TI_flags(%r12),_TIF_ISOLATE_BP
-.Lmcck_stack:
 	lg	%r15,__LC_MCCK_STACK
 	la	%r11,STACK_FRAME_OVERHEAD(%r15)
 	stctg	%c1,%c1,__PT_CR1(%r11)
@@ -567,7 +552,7 @@ ENTRY(mcck_int_handler)
 	mvc	__LC_RETURN_MCCK_PSW(16),__PT_PSW(%r11) # move return PSW
 	tm	__LC_RETURN_MCCK_PSW+1,0x01 # returning to user ?
 	jno	0f
-	BPEXIT	__TI_flags(%r12),_TIF_ISOLATE_BP
+	BPON
 	stpt	__LC_EXIT_TIMER
 0:	ALTERNATIVE "nop", __stringify(lghi %r12,__LC_LAST_BREAK_SAVE_AREA),193
 	LBEAR	0(%r12)
diff --git a/arch/s390/kernel/ftrace.c b/arch/s390/kernel/ftrace.c
index 416b5a94353d..6f6c44b7af89 100644
--- a/arch/s390/kernel/ftrace.c
+++ b/arch/s390/kernel/ftrace.c
@@ -49,26 +49,6 @@ struct ftrace_insn {
 	s32 disp;
 } __packed;
 
-asm(
-	"	.align 16\n"
-	"ftrace_shared_hotpatch_trampoline_br:\n"
-	"	lmg	%r0,%r1,2(%r1)\n"
-	"	br	%r1\n"
-	"ftrace_shared_hotpatch_trampoline_br_end:\n"
-);
-
-#ifdef CONFIG_EXPOLINE
-asm(
-	"	.align 16\n"
-	"ftrace_shared_hotpatch_trampoline_exrl:\n"
-	"	lmg	%r0,%r1,2(%r1)\n"
-	"	exrl	%r0,0f\n"
-	"	j	.\n"
-	"0:	br	%r1\n"
-	"ftrace_shared_hotpatch_trampoline_exrl_end:\n"
-);
-#endif /* CONFIG_EXPOLINE */
-
 #ifdef CONFIG_MODULES
 static char *ftrace_plt;
 #endif /* CONFIG_MODULES */
diff --git a/arch/s390/kernel/head64.S b/arch/s390/kernel/head64.S
index 3b3bf8329e6c..f68be3951103 100644
--- a/arch/s390/kernel/head64.S
+++ b/arch/s390/kernel/head64.S
@@ -26,9 +26,6 @@ ENTRY(startup_continue)
 	stg	%r14,__LC_CURRENT
 	larl	%r15,init_thread_union+THREAD_SIZE-STACK_FRAME_OVERHEAD-__PT_SIZE
 	brasl	%r14,sclp_early_adjust_va	# allow sclp_early_printk
-#ifdef CONFIG_KASAN
-	brasl	%r14,kasan_early_init
-#endif
 	brasl	%r14,startup_init		# s390 specific early init
 	brasl	%r14,start_kernel		# common init code
 #
diff --git a/arch/s390/kernel/ipl.c b/arch/s390/kernel/ipl.c
index 5f0f5c86963a..0f91cd401eef 100644
--- a/arch/s390/kernel/ipl.c
+++ b/arch/s390/kernel/ipl.c
@@ -649,7 +649,6 @@ static struct kset *ipl_kset;
 
 static void __ipl_run(void *unused)
 {
-	__bpon();
 	diag308(DIAG308_LOAD_CLEAR, NULL);
 }
 
diff --git a/arch/s390/kernel/mcount.S b/arch/s390/kernel/mcount.S
index 43ff91073d2a..4c4ee762f515 100644
--- a/arch/s390/kernel/mcount.S
+++ b/arch/s390/kernel/mcount.S
@@ -135,6 +135,22 @@ SYM_FUNC_END(return_to_handler)
 #endif
 #endif /* CONFIG_FUNCTION_TRACER */
 
+SYM_CODE_START(ftrace_shared_hotpatch_trampoline_br)
+	lmg	%r0,%r1,2(%r1)
+	br	%r1
+SYM_INNER_LABEL(ftrace_shared_hotpatch_trampoline_br_end, SYM_L_GLOBAL)
+SYM_CODE_END(ftrace_shared_hotpatch_trampoline_br)
+
+#ifdef CONFIG_EXPOLINE
+SYM_CODE_START(ftrace_shared_hotpatch_trampoline_exrl)
+	lmg	%r0,%r1,2(%r1)
+	exrl	%r0,0f
+	j	.
+0:	br	%r1
+SYM_INNER_LABEL(ftrace_shared_hotpatch_trampoline_exrl_end, SYM_L_GLOBAL)
+SYM_CODE_END(ftrace_shared_hotpatch_trampoline_exrl)
+#endif /* CONFIG_EXPOLINE */
+
 #ifdef CONFIG_RETHOOK
 
 SYM_FUNC_START(arch_rethook_trampoline)
diff --git a/arch/s390/kernel/perf_cpum_sf.c b/arch/s390/kernel/perf_cpum_sf.c
index e7b867e2f73f..7ef72f5ff52e 100644
--- a/arch/s390/kernel/perf_cpum_sf.c
+++ b/arch/s390/kernel/perf_cpum_sf.c
@@ -882,10 +882,6 @@ static int __hw_perf_event_init(struct perf_event *event)
 		SAMPL_FLAGS(hwc) |= PERF_CPUM_SF_DIAG_MODE;
 	}
 
-	/* Check and set other sampling flags */
-	if (attr->config1 & PERF_CPUM_SF_FULL_BLOCKS)
-		SAMPL_FLAGS(hwc) |= PERF_CPUM_SF_FULL_BLOCKS;
-
 	err =  __hw_perf_event_init_rate(event, &si);
 	if (err)
 		goto out;
@@ -1293,11 +1289,8 @@ static inline __uint128_t __cdsg(__uint128_t *ptr, __uint128_t old, __uint128_t
  * The sampling buffer position are retrieved and saved in the TEAR_REG
  * register of the specified perf event.
  *
- * Only full sample-data-blocks are processed.	Specify the flash_all flag
- * to also walk through partially filled sample-data-blocks.  It is ignored
- * if PERF_CPUM_SF_FULL_BLOCKS is set.	The PERF_CPUM_SF_FULL_BLOCKS flag
- * enforces the processing of full sample-data-blocks only (trailer entries
- * with the block-full-indicator bit set).
+ * Only full sample-data-blocks are processed.	Specify the flush_all flag
+ * to also walk through partially filled sample-data-blocks.
  */
 static void hw_perf_event_update(struct perf_event *event, int flush_all)
 {
@@ -1315,9 +1308,6 @@ static void hw_perf_event_update(struct perf_event *event, int flush_all)
 	if (SAMPL_DIAG_MODE(&event->hw))
 		return;
 
-	if (flush_all && SDB_FULL_BLOCKS(hwc))
-		flush_all = 0;
-
 	sdbt = (unsigned long *) TEAR_REG(hwc);
 	done = event_overflow = sampl_overflow = num_sdb = 0;
 	while (!done) {
diff --git a/arch/s390/kernel/process.c b/arch/s390/kernel/process.c
index 67df64ef4839..87ca3a727604 100644
--- a/arch/s390/kernel/process.c
+++ b/arch/s390/kernel/process.c
@@ -136,12 +136,12 @@ int copy_thread(struct task_struct *p, const struct kernel_clone_args *args)
 	p->thread.last_break = 1;
 
 	frame->sf.back_chain = 0;
-	frame->sf.gprs[5] = (unsigned long)frame + sizeof(struct stack_frame);
-	frame->sf.gprs[6] = (unsigned long)p;
+	frame->sf.gprs[11 - 6] = (unsigned long)&frame->childregs;
+	frame->sf.gprs[12 - 6] = (unsigned long)p;
 	/* new return point is ret_from_fork */
-	frame->sf.gprs[8] = (unsigned long)ret_from_fork;
+	frame->sf.gprs[14 - 6] = (unsigned long)ret_from_fork;
 	/* fake return stack for resume(), don't go back to schedule */
-	frame->sf.gprs[9] = (unsigned long)frame;
+	frame->sf.gprs[15 - 6] = (unsigned long)frame;
 
 	/* Store access registers to kernel stack of new process. */
 	if (unlikely(args->fn)) {
@@ -149,8 +149,6 @@ int copy_thread(struct task_struct *p, const struct kernel_clone_args *args)
 		memset(&frame->childregs, 0, sizeof(struct pt_regs));
 		frame->childregs.psw.mask = PSW_KERNEL_BITS | PSW_MASK_IO |
 					    PSW_MASK_EXT | PSW_MASK_MCHECK;
-		frame->childregs.psw.addr =
-				(unsigned long)__ret_from_fork;
 		frame->childregs.gprs[9] = (unsigned long)args->fn;
 		frame->childregs.gprs[10] = (unsigned long)args->fn_arg;
 		frame->childregs.orig_gpr2 = -1;
diff --git a/arch/s390/kernel/processor.c b/arch/s390/kernel/processor.c
index a194611ba88c..0a999c8226d7 100644
--- a/arch/s390/kernel/processor.c
+++ b/arch/s390/kernel/processor.c
@@ -364,21 +364,3 @@ const struct seq_operations cpuinfo_op = {
 	.stop	= c_stop,
 	.show	= show_cpuinfo,
 };
-
-int s390_isolate_bp(void)
-{
-	if (!test_facility(82))
-		return -EOPNOTSUPP;
-	set_thread_flag(TIF_ISOLATE_BP);
-	return 0;
-}
-EXPORT_SYMBOL(s390_isolate_bp);
-
-int s390_isolate_bp_guest(void)
-{
-	if (!test_facility(82))
-		return -EOPNOTSUPP;
-	set_thread_flag(TIF_ISOLATE_BP_GUEST);
-	return 0;
-}
-EXPORT_SYMBOL(s390_isolate_bp_guest);
diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c
index 8ec5cdf9dadc..d25425b8d0c0 100644
--- a/arch/s390/kernel/setup.c
+++ b/arch/s390/kernel/setup.c
@@ -74,7 +74,7 @@
 #include <asm/numa.h>
 #include <asm/alternative.h>
 #include <asm/nospec-branch.h>
-#include <asm/mem_detect.h>
+#include <asm/physmem_info.h>
 #include <asm/maccess.h>
 #include <asm/uv.h>
 #include <asm/asm-offsets.h>
@@ -147,14 +147,9 @@ static u32 __amode31_ref *__ctl_duct = __ctl_duct_amode31;
 
 int __bootdata(noexec_disabled);
 unsigned long __bootdata(ident_map_size);
-struct mem_detect_info __bootdata(mem_detect);
-struct initrd_data __bootdata(initrd_data);
-unsigned long __bootdata(pgalloc_pos);
-unsigned long __bootdata(pgalloc_end);
-unsigned long __bootdata(pgalloc_low);
+struct physmem_info __bootdata(physmem_info);
 
 unsigned long __bootdata_preserved(__kaslr_offset);
-unsigned long __bootdata(__amode31_base);
 unsigned int __bootdata_preserved(zlib_dfltcc_support);
 EXPORT_SYMBOL(zlib_dfltcc_support);
 u64 __bootdata_preserved(stfle_fac_list[16]);
@@ -635,7 +630,11 @@ static struct notifier_block kdump_mem_nb = {
  */
 static void __init reserve_pgtables(void)
 {
-	memblock_reserve(pgalloc_pos, pgalloc_end - pgalloc_pos);
+	unsigned long start, end;
+	struct reserved_range *range;
+
+	for_each_physmem_reserved_type_range(RR_VMEM, range, &start, &end)
+		memblock_reserve(start, end - start);
 }
 
 /*
@@ -712,13 +711,13 @@ static void __init reserve_crashkernel(void)
  */
 static void __init reserve_initrd(void)
 {
-#ifdef CONFIG_BLK_DEV_INITRD
-	if (!initrd_data.start || !initrd_data.size)
+	unsigned long addr, size;
+
+	if (!IS_ENABLED(CONFIG_BLK_DEV_INITRD) || !get_physmem_reserved(RR_INITRD, &addr, &size))
 		return;
-	initrd_start = (unsigned long)__va(initrd_data.start);
-	initrd_end = initrd_start + initrd_data.size;
-	memblock_reserve(initrd_data.start, initrd_data.size);
-#endif
+	initrd_start = (unsigned long)__va(addr);
+	initrd_end = initrd_start + size;
+	memblock_reserve(addr, size);
 }
 
 /*
@@ -730,72 +729,40 @@ static void __init reserve_certificate_list(void)
 		memblock_reserve(ipl_cert_list_addr, ipl_cert_list_size);
 }
 
-static void __init reserve_mem_detect_info(void)
+static void __init reserve_physmem_info(void)
 {
-	unsigned long start, size;
+	unsigned long addr, size;
 
-	get_mem_detect_reserved(&start, &size);
-	if (size)
-		memblock_reserve(start, size);
+	if (get_physmem_reserved(RR_MEM_DETECT_EXTENDED, &addr, &size))
+		memblock_reserve(addr, size);
 }
 
-static void __init free_mem_detect_info(void)
+static void __init free_physmem_info(void)
 {
-	unsigned long start, size;
+	unsigned long addr, size;
 
-	get_mem_detect_reserved(&start, &size);
-	if (size)
-		memblock_phys_free(start, size);
-}
-
-static const char * __init get_mem_info_source(void)
-{
-	switch (mem_detect.info_source) {
-	case MEM_DETECT_SCLP_STOR_INFO:
-		return "sclp storage info";
-	case MEM_DETECT_DIAG260:
-		return "diag260";
-	case MEM_DETECT_SCLP_READ_INFO:
-		return "sclp read info";
-	case MEM_DETECT_BIN_SEARCH:
-		return "binary search";
-	}
-	return "none";
+	if (get_physmem_reserved(RR_MEM_DETECT_EXTENDED, &addr, &size))
+		memblock_phys_free(addr, size);
 }
 
-static void __init memblock_add_mem_detect_info(void)
+static void __init memblock_add_physmem_info(void)
 {
 	unsigned long start, end;
 	int i;
 
 	pr_debug("physmem info source: %s (%hhd)\n",
-		 get_mem_info_source(), mem_detect.info_source);
+		 get_physmem_info_source(), physmem_info.info_source);
 	/* keep memblock lists close to the kernel */
 	memblock_set_bottom_up(true);
-	for_each_mem_detect_usable_block(i, &start, &end)
+	for_each_physmem_usable_range(i, &start, &end)
 		memblock_add(start, end - start);
-	for_each_mem_detect_block(i, &start, &end)
+	for_each_physmem_online_range(i, &start, &end)
 		memblock_physmem_add(start, end - start);
 	memblock_set_bottom_up(false);
 	memblock_set_node(0, ULONG_MAX, &memblock.memory, 0);
 }
 
 /*
- * Check for initrd being in usable memory
- */
-static void __init check_initrd(void)
-{
-#ifdef CONFIG_BLK_DEV_INITRD
-	if (initrd_data.start && initrd_data.size &&
-	    !memblock_is_region_memory(initrd_data.start, initrd_data.size)) {
-		pr_err("The initial RAM disk does not fit into the memory\n");
-		memblock_phys_free(initrd_data.start, initrd_data.size);
-		initrd_start = initrd_end = 0;
-	}
-#endif
-}
-
-/*
  * Reserve memory used for lowcore/command line/kernel image.
  */
 static void __init reserve_kernel(void)
@@ -803,7 +770,7 @@ static void __init reserve_kernel(void)
 	memblock_reserve(0, STARTUP_NORMAL_OFFSET);
 	memblock_reserve(OLDMEM_BASE, sizeof(unsigned long));
 	memblock_reserve(OLDMEM_SIZE, sizeof(unsigned long));
-	memblock_reserve(__amode31_base, __eamode31 - __samode31);
+	memblock_reserve(physmem_info.reserved[RR_AMODE31].start, __eamode31 - __samode31);
 	memblock_reserve(__pa(sclp_early_sccb), EXT_SCCB_READ_SCP);
 	memblock_reserve(__pa(_stext), _end - _stext);
 }
@@ -825,13 +792,13 @@ static void __init setup_memory(void)
 static void __init relocate_amode31_section(void)
 {
 	unsigned long amode31_size = __eamode31 - __samode31;
-	long amode31_offset = __amode31_base - __samode31;
+	long amode31_offset = physmem_info.reserved[RR_AMODE31].start - __samode31;
 	long *ptr;
 
 	pr_info("Relocating AMODE31 section of size 0x%08lx\n", amode31_size);
 
 	/* Move original AMODE31 section to the new one */
-	memmove((void *)__amode31_base, (void *)__samode31, amode31_size);
+	memmove((void *)physmem_info.reserved[RR_AMODE31].start, (void *)__samode31, amode31_size);
 	/* Zero out the old AMODE31 section to catch invalid accesses within it */
 	memset((void *)__samode31, 0, amode31_size);
 
@@ -997,14 +964,14 @@ void __init setup_arch(char **cmdline_p)
 	reserve_kernel();
 	reserve_initrd();
 	reserve_certificate_list();
-	reserve_mem_detect_info();
+	reserve_physmem_info();
 	memblock_set_current_limit(ident_map_size);
 	memblock_allow_resize();
 
 	/* Get information about *all* installed memory */
-	memblock_add_mem_detect_info();
+	memblock_add_physmem_info();
 
-	free_mem_detect_info();
+	free_physmem_info();
 	setup_memory_end();
 	memblock_dump_all();
 	setup_memory();
@@ -1017,7 +984,6 @@ void __init setup_arch(char **cmdline_p)
 	if (MACHINE_HAS_EDAT2)
 		hugetlb_cma_reserve(PUD_SHIFT - PAGE_SHIFT);
 
-	check_initrd();
 	reserve_crashkernel();
 #ifdef CONFIG_CRASH_DUMP
 	/*
diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c
index d4888453bbf8..0126c5f6b904 100644
--- a/arch/s390/kernel/smp.c
+++ b/arch/s390/kernel/smp.c
@@ -348,7 +348,6 @@ static void pcpu_delegate(struct pcpu *pcpu,
 		abs_lc->restart_source = source_cpu;
 		put_abs_lowcore(abs_lc);
 	}
-	__bpon();
 	asm volatile(
 		"0:	sigp	0,%0,%2	# sigp restart to target cpu\n"
 		"	brc	2,0b	# busy, try again\n"
@@ -986,7 +985,6 @@ void __cpu_die(unsigned int cpu)
 void __noreturn cpu_die(void)
 {
 	idle_task_exit();
-	__bpon();
 	pcpu_sigp_retry(pcpu_devices + smp_processor_id(), SIGP_STOP, 0);
 	for (;;) ;
 }
diff --git a/arch/s390/kernel/topology.c b/arch/s390/kernel/topology.c
index c6eecd4a5302..e5d6a1c25d13 100644
--- a/arch/s390/kernel/topology.c
+++ b/arch/s390/kernel/topology.c
@@ -637,16 +637,6 @@ static struct ctl_table topology_ctl_table[] = {
 	{ },
 };
 
-static struct ctl_table topology_dir_table[] = {
-	{
-		.procname	= "s390",
-		.maxlen		= 0,
-		.mode		= 0555,
-		.child		= topology_ctl_table,
-	},
-	{ },
-};
-
 static int __init topology_init(void)
 {
 	timer_setup(&topology_timer, topology_timer_fn, TIMER_DEFERRABLE);
@@ -654,7 +644,7 @@ static int __init topology_init(void)
 		set_topology_timer();
 	else
 		topology_update_polarization_simple();
-	register_sysctl_table(topology_dir_table);
+	register_sysctl("s390", topology_ctl_table);
 	return device_create_file(cpu_subsys.dev_root, &dev_attr_dispatching);
 }
 device_initcall(topology_init);
diff --git a/arch/s390/kernel/vdso32/vdso_user_wrapper.S b/arch/s390/kernel/vdso32/vdso_user_wrapper.S
index 3f42f27f978c..2e645003fdaf 100644
--- a/arch/s390/kernel/vdso32/vdso_user_wrapper.S
+++ b/arch/s390/kernel/vdso32/vdso_user_wrapper.S
@@ -1,12 +1,13 @@
 /* SPDX-License-Identifier: GPL-2.0 */
 
+#include <linux/linkage.h>
 #include <asm/unistd.h>
 #include <asm/dwarf.h>
 
 .macro vdso_syscall func,syscall
 	.globl __kernel_compat_\func
 	.type  __kernel_compat_\func,@function
-	.align 8
+	__ALIGN
 __kernel_compat_\func:
 	CFI_STARTPROC
 	svc	\syscall
diff --git a/arch/s390/kernel/vdso64/vdso_user_wrapper.S b/arch/s390/kernel/vdso64/vdso_user_wrapper.S
index 97f0c0a669a5..57f62596e53b 100644
--- a/arch/s390/kernel/vdso64/vdso_user_wrapper.S
+++ b/arch/s390/kernel/vdso64/vdso_user_wrapper.S
@@ -1,4 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0 */
+#include <linux/linkage.h>
 #include <asm/vdso.h>
 #include <asm/unistd.h>
 #include <asm/asm-offsets.h>
@@ -16,7 +17,7 @@
 .macro vdso_func func
 	.globl __kernel_\func
 	.type  __kernel_\func,@function
-	.align 8
+	__ALIGN
 __kernel_\func:
 	CFI_STARTPROC
 	aghi	%r15,-WRAPPER_FRAME_SIZE
@@ -41,7 +42,7 @@ vdso_func getcpu
 .macro vdso_syscall func,syscall
 	.globl __kernel_\func
 	.type  __kernel_\func,@function
-	.align 8
+	__ALIGN
 __kernel_\func:
 	CFI_STARTPROC
 	svc	\syscall
diff --git a/arch/s390/kernel/vmlinux.lds.S b/arch/s390/kernel/vmlinux.lds.S
index b653ba8d51e6..8d2288a5ba25 100644
--- a/arch/s390/kernel/vmlinux.lds.S
+++ b/arch/s390/kernel/vmlinux.lds.S
@@ -219,6 +219,13 @@ SECTIONS
 		QUAD(init_mm)
 		QUAD(swapper_pg_dir)
 		QUAD(invalid_pg_dir)
+#ifdef CONFIG_KASAN
+		QUAD(kasan_early_shadow_page)
+		QUAD(kasan_early_shadow_pte)
+		QUAD(kasan_early_shadow_pmd)
+		QUAD(kasan_early_shadow_pud)
+		QUAD(kasan_early_shadow_p4d)
+#endif
 	} :NONE
 
 	/* Debugging sections.	*/