Merge tag 's390-6.17-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux

Pull s390 updates from Alexander Gordeev:

 - Standardize on the __ASSEMBLER__ macro that is provided by GCC and
   Clang compilers and replace __ASSEMBLY__ with __ASSEMBLER__ in both
   uapi and non-uapi headers

 - Explicitly include <linux/export.h> in architecture and driver files
   which contain an EXPORT_SYMBOL() and remove the include from the
   files which do not contain the EXPORT_SYMBOL()

 - Use the full title of "z/Architecture Principles of Operation" manual
   and the name of a section where facility bits are listed

 - Use -D__DISABLE_EXPORTS for files in arch/s390/boot to avoid
   unnecessary slowing down of the build and confusing external kABI
   tools that process symtypes data

 - Print additional unrecoverable machine check information to make the
   root cause analysis easier

 - Move cmpxchg_user_key() handling to uaccess library code, since the
   generated code is large anyway and there is no benefit if it is
   inlined

 - Fix a problem when cmpxchg_user_key() is executing a code with a
   non-default key: if a system is IPL-ed with "LOAD NORMAL", and the
   previous system used storage keys where the fetch-protection bit was
   set for some pages, and the cmpxchg_user_key() is located within such
   page, a protection exception happens

 - Either the external call or emergency signal order is used to send an
   IPI to a remote CPU. Use the external order only, since it is at
   least as good and sometimes even better, than the emergency signal

 - In case of an early crash the early program check handler prints more
   or less random value of the last breaking event address, since it is
   not initialized properly. Copy the last breaking event address from
   the lowcore to pt_regs to address this

 - During STP synchronization check udelay() can not be used, since the
   first CPU modifies tod_clock_base and get_tod_clock_monotonic() might
   return a non-monotonic time. Instead, busy-loop on other CPUs, while
   the the first CPU actually handles the synchronization operation

 - When debugging the early kernel boot using QEMU with the -S flag and
   GDB attached, skip the decompressor and start directly in kernel

 - Rename PAI Crypto event 4210 according to z16 and z17 "z/Architecture
   Principles of Operation" manual

 - Remove the in-kernel time steering support in favour of the new s390
   PTP driver, which allows the kernel clock steered more precisely

 - Remove a possible false-positive warning in pte_free_defer(), which
   could be triggered in a valid case KVM guest process is initializing

* tag 's390-6.17-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (29 commits)
  s390/mm: Remove possible false-positive warning in pte_free_defer()
  s390/stp: Default to enabled
  s390/stp: Remove leap second support
  s390/time: Remove in-kernel time steering
  s390/sclp: Use monotonic clock in sclp_sync_wait()
  s390/smp: Use monotonic clock in smp_emergency_stop()
  s390/time: Use monotonic clock in get_cycles()
  s390/pai_crypto: Rename PAI Crypto event 4210
  scripts/gdb/symbols: make lx-symbols skip the s390 decompressor
  s390/boot: Introduce jump_to_kernel() function
  s390/stp: Remove udelay from stp_sync_clock()
  s390/early: Copy last breaking event address to pt_regs
  s390/smp: Remove conditional emergency signal order code usage
  s390/uaccess: Merge cmpxchg_user_key() inline assemblies
  s390/uaccess: Prevent kprobes on cmpxchg_user_key() functions
  s390/uaccess: Initialize code pages executed with non-default access key
  s390/skey: Provide infrastructure for executing with non-default access key
  s390/uaccess: Make cmpxchg_user_key() library code
  s390/page: Add memory clobber to page_set_storage_key()
  s390/page: Cleanup page_set_storage_key() inline assemblies
  ...

36 files changed, 140 insertions, 263 deletions

diff --git a/arch/s390/include/asm/alternative.h b/arch/s390/include/asm/alternative.h
index c7bf60a541e9..1c56480def9e 100644
--- a/arch/s390/include/asm/alternative.h
+++ b/arch/s390/include/asm/alternative.h
@@ -51,7 +51,7 @@
 					 ALT_TYPE_SPEC << ALT_TYPE_SHIFT	| \
 					 (facility) << ALT_DATA_SHIFT)
 
-#ifndef __ASSEMBLY__
+#ifndef __ASSEMBLER__
 
 #include <linux/types.h>
 #include <linux/stddef.h>
@@ -183,7 +183,7 @@ static inline void apply_alternatives(struct alt_instr *start, struct alt_instr
 /* Use this macro if clobbers are needed without inputs. */
 #define ASM_NO_INPUT_CLOBBER(clobber...) : clobber
 
-#else  /* __ASSEMBLY__ */
+#else  /* __ASSEMBLER__ */
 
 /*
  * Issue one struct alt_instr descriptor entry (need to put it into
@@ -233,6 +233,6 @@ static inline void apply_alternatives(struct alt_instr *start, struct alt_instr
 	.popsection
 .endm
 
-#endif /* __ASSEMBLY__ */
+#endif /* __ASSEMBLER__ */
 
 #endif /* _ASM_S390_ALTERNATIVE_H */
diff --git a/arch/s390/include/asm/asm-const.h b/arch/s390/include/asm/asm-const.h
index 11f615eb0066..1cfffad9eea0 100644
--- a/arch/s390/include/asm/asm-const.h
+++ b/arch/s390/include/asm/asm-const.h
@@ -2,7 +2,7 @@
 #ifndef _ASM_S390_ASM_CONST_H
 #define _ASM_S390_ASM_CONST_H
 
-#ifdef __ASSEMBLY__
+#ifdef __ASSEMBLER__
 #  define stringify_in_c(...)	__VA_ARGS__
 #else
 /* This version of stringify will deal with commas... */
diff --git a/arch/s390/include/asm/cpu.h b/arch/s390/include/asm/cpu.h
index 26c710cd3485..5672e3fab52b 100644
--- a/arch/s390/include/asm/cpu.h
+++ b/arch/s390/include/asm/cpu.h
@@ -9,7 +9,7 @@
 #ifndef _ASM_S390_CPU_H
 #define _ASM_S390_CPU_H
 
-#ifndef __ASSEMBLY__
+#ifndef __ASSEMBLER__
 
 #include <linux/types.h>
 #include <linux/jump_label.h>
@@ -24,5 +24,5 @@ struct cpuid
 
 DECLARE_STATIC_KEY_FALSE(cpu_has_bear);
 
-#endif /* __ASSEMBLY__ */
+#endif /* __ASSEMBLER__ */
 #endif /* _ASM_S390_CPU_H */
diff --git a/arch/s390/include/asm/cpu_mf-insn.h b/arch/s390/include/asm/cpu_mf-insn.h
index a68b362e0964..941663939cc7 100644
--- a/arch/s390/include/asm/cpu_mf-insn.h
+++ b/arch/s390/include/asm/cpu_mf-insn.h
@@ -8,7 +8,7 @@
 #ifndef _ASM_S390_CPU_MF_INSN_H
 #define _ASM_S390_CPU_MF_INSN_H
 
-#ifdef __ASSEMBLY__
+#ifdef __ASSEMBLER__
 
 /* Macro to generate the STCCTM instruction with a customized
  * M3 field designating the counter set.
@@ -17,6 +17,6 @@
 	.insn	rsy,0xeb0000000017,\r1,\m3 & 0xf,\db2
 .endm
 
-#endif /* __ASSEMBLY__ */
+#endif /* __ASSEMBLER__ */
 
 #endif
diff --git a/arch/s390/include/asm/ctlreg.h b/arch/s390/include/asm/ctlreg.h
index e6527f51ad0b..e93cc240a1ed 100644
--- a/arch/s390/include/asm/ctlreg.h
+++ b/arch/s390/include/asm/ctlreg.h
@@ -80,7 +80,7 @@
 #define CR14_EXTERNAL_DAMAGE_SUBMASK		BIT(CR14_EXTERNAL_DAMAGE_SUBMASK_BIT)
 #define CR14_WARNING_SUBMASK			BIT(CR14_WARNING_SUBMASK_BIT)
 
-#ifndef __ASSEMBLY__
+#ifndef __ASSEMBLER__
 
 #include <linux/bug.h>
 
@@ -252,5 +252,5 @@ union ctlreg15 {
 	};
 };
 
-#endif /* __ASSEMBLY__ */
+#endif /* __ASSEMBLER__ */
 #endif /* __ASM_S390_CTLREG_H */
diff --git a/arch/s390/include/asm/dwarf.h b/arch/s390/include/asm/dwarf.h
index 390906b8e386..e3ad6798d0cd 100644
--- a/arch/s390/include/asm/dwarf.h
+++ b/arch/s390/include/asm/dwarf.h
@@ -2,7 +2,7 @@
 #ifndef _ASM_S390_DWARF_H
 #define _ASM_S390_DWARF_H
 
-#ifdef __ASSEMBLY__
+#ifdef __ASSEMBLER__
 
 #define CFI_STARTPROC		.cfi_startproc
 #define CFI_ENDPROC		.cfi_endproc
@@ -33,6 +33,6 @@
 	.cfi_sections .eh_frame, .debug_frame
 #endif
 
-#endif	/* __ASSEMBLY__ */
+#endif	/* __ASSEMBLER__ */
 
 #endif	/* _ASM_S390_DWARF_H */
diff --git a/arch/s390/include/asm/extmem.h b/arch/s390/include/asm/extmem.h
index e0a06060afdd..225ee89c3f5e 100644
--- a/arch/s390/include/asm/extmem.h
+++ b/arch/s390/include/asm/extmem.h
@@ -6,7 +6,7 @@
 
 #ifndef _ASM_S390X_DCSS_H
 #define _ASM_S390X_DCSS_H
-#ifndef __ASSEMBLY__
+#ifndef __ASSEMBLER__
 
 /*
  * DCSS segment is defined as a contiguous range of pages using DEFSEG command.
diff --git a/arch/s390/include/asm/fpu-insn-asm.h b/arch/s390/include/asm/fpu-insn-asm.h
index d296322be4bc..cc0468fdf2d0 100644
--- a/arch/s390/include/asm/fpu-insn-asm.h
+++ b/arch/s390/include/asm/fpu-insn-asm.h
@@ -16,7 +16,7 @@
 #error only <asm/fpu-insn.h> can be included directly
 #endif
 
-#ifdef __ASSEMBLY__
+#ifdef __ASSEMBLER__
 
 /* Macros to generate vector instruction byte code */
 
@@ -750,5 +750,5 @@
 	MRXBOPC	0, 0x77, v1, v2, v3
 .endm
 
-#endif	/* __ASSEMBLY__ */
+#endif	/* __ASSEMBLER__ */
 #endif	/* __ASM_S390_FPU_INSN_ASM_H */
diff --git a/arch/s390/include/asm/fpu-insn.h b/arch/s390/include/asm/fpu-insn.h
index f668bffd6dd3..135bb89c0a89 100644
--- a/arch/s390/include/asm/fpu-insn.h
+++ b/arch/s390/include/asm/fpu-insn.h
@@ -9,7 +9,7 @@
 
 #include <asm/fpu-insn-asm.h>
 
-#ifndef __ASSEMBLY__
+#ifndef __ASSEMBLER__
 
 #include <linux/instrumented.h>
 #include <asm/asm-extable.h>
@@ -475,5 +475,5 @@ static __always_inline void fpu_vzero(u8 v)
 		     : "memory");
 }
 
-#endif /* __ASSEMBLY__ */
+#endif /* __ASSEMBLER__ */
 #endif	/* __ASM_S390_FPU_INSN_H */
diff --git a/arch/s390/include/asm/ftrace.h b/arch/s390/include/asm/ftrace.h
index 185331e91f83..bee2d16c2951 100644
--- a/arch/s390/include/asm/ftrace.h
+++ b/arch/s390/include/asm/ftrace.h
@@ -5,7 +5,7 @@
 #define ARCH_SUPPORTS_FTRACE_OPS 1
 #define MCOUNT_INSN_SIZE	6
 
-#ifndef __ASSEMBLY__
+#ifndef __ASSEMBLER__
 #include <asm/stacktrace.h>
 
 static __always_inline unsigned long return_address(unsigned int n)
@@ -134,7 +134,7 @@ void ftrace_graph_func(unsigned long ip, unsigned long parent_ip,
 		       struct ftrace_ops *op, struct ftrace_regs *fregs);
 #define ftrace_graph_func ftrace_graph_func
 
-#endif /* __ASSEMBLY__ */
+#endif /* __ASSEMBLER__ */
 
 #ifdef CONFIG_FUNCTION_TRACER
 
diff --git a/arch/s390/include/asm/irq.h b/arch/s390/include/asm/irq.h
index bde6a496df5f..697497e7d13e 100644
--- a/arch/s390/include/asm/irq.h
+++ b/arch/s390/include/asm/irq.h
@@ -25,7 +25,7 @@
 #define EXT_IRQ_CP_SERVICE	0x2603
 #define EXT_IRQ_IUCV		0x4000
 
-#ifndef __ASSEMBLY__
+#ifndef __ASSEMBLER__
 
 #include <linux/hardirq.h>
 #include <linux/percpu.h>
@@ -120,6 +120,6 @@ void irq_subclass_unregister(enum irq_subclass subclass);
 
 #define irq_canonicalize(irq)  (irq)
 
-#endif /* __ASSEMBLY__ */
+#endif /* __ASSEMBLER__ */
 
 #endif /* _ASM_IRQ_H */
diff --git a/arch/s390/include/asm/jump_label.h b/arch/s390/include/asm/jump_label.h
index bf78cf381dfc..d9cbc18f6b2e 100644
--- a/arch/s390/include/asm/jump_label.h
+++ b/arch/s390/include/asm/jump_label.h
@@ -4,7 +4,7 @@
 
 #define HAVE_JUMP_LABEL_BATCH
 
-#ifndef __ASSEMBLY__
+#ifndef __ASSEMBLER__
 
 #include <linux/types.h>
 #include <linux/stringify.h>
@@ -51,5 +51,5 @@ label:
 	return true;
 }
 
-#endif  /* __ASSEMBLY__ */
+#endif  /* __ASSEMBLER__ */
 #endif
diff --git a/arch/s390/include/asm/lowcore.h b/arch/s390/include/asm/lowcore.h
index e99e9c87b1ce..d9c853db9a40 100644
--- a/arch/s390/include/asm/lowcore.h
+++ b/arch/s390/include/asm/lowcore.h
@@ -22,7 +22,7 @@
 
 #define LOWCORE_ALT_ADDRESS	_AC(0x70000, UL)
 
-#ifndef __ASSEMBLY__
+#ifndef __ASSEMBLER__
 
 struct pgm_tdb {
 	u64 data[32];
@@ -237,7 +237,7 @@ static inline void set_prefix(__u32 address)
 	asm volatile("spx %0" : : "Q" (address) : "memory");
 }
 
-#else /* __ASSEMBLY__ */
+#else /* __ASSEMBLER__ */
 
 .macro GET_LC reg
 	ALTERNATIVE "lghi	\reg,0",					\
@@ -251,5 +251,5 @@ static inline void set_prefix(__u32 address)
 		ALT_FEATURE(MFEATURE_LOWCORE)
 .endm
 
-#endif /* __ASSEMBLY__ */
+#endif /* __ASSEMBLER__ */
 #endif /* _ASM_S390_LOWCORE_H */
diff --git a/arch/s390/include/asm/machine.h b/arch/s390/include/asm/machine.h
index 8abe5afdbfc4..9bd4a9dc7778 100644
--- a/arch/s390/include/asm/machine.h
+++ b/arch/s390/include/asm/machine.h
@@ -20,7 +20,7 @@
 #define MFEATURE_LPAR		9
 #define MFEATURE_DIAG288	10
 
-#ifndef __ASSEMBLY__
+#ifndef __ASSEMBLER__
 
 #include <linux/bitops.h>
 #include <asm/alternative.h>
@@ -100,5 +100,5 @@ DEFINE_MACHINE_HAS_FEATURE(lpar, MFEATURE_LPAR)
 #define machine_is_kvm	machine_has_kvm
 #define machine_is_lpar	machine_has_lpar
 
-#endif /* __ASSEMBLY__ */
+#endif /* __ASSEMBLER__ */
 #endif /* __ASM_S390_MACHINE_H */
diff --git a/arch/s390/include/asm/mem_encrypt.h b/arch/s390/include/asm/mem_encrypt.h
index b85e13505a0f..28c83ec1f243 100644
--- a/arch/s390/include/asm/mem_encrypt.h
+++ b/arch/s390/include/asm/mem_encrypt.h
@@ -2,11 +2,11 @@
 #ifndef S390_MEM_ENCRYPT_H__
 #define S390_MEM_ENCRYPT_H__
 
-#ifndef __ASSEMBLY__
+#ifndef __ASSEMBLER__
 
 int set_memory_encrypted(unsigned long vaddr, int numpages);
 int set_memory_decrypted(unsigned long vaddr, int numpages);
 
-#endif	/* __ASSEMBLY__ */
+#endif	/* __ASSEMBLER__ */
 
 #endif	/* S390_MEM_ENCRYPT_H__ */
diff --git a/arch/s390/include/asm/nmi.h b/arch/s390/include/asm/nmi.h
index 227466ce9e41..6454c1531854 100644
--- a/arch/s390/include/asm/nmi.h
+++ b/arch/s390/include/asm/nmi.h
@@ -33,7 +33,7 @@
 #define MCCK_CODE_FC_VALID		BIT(63 - 43)
 #define MCCK_CODE_CPU_TIMER_VALID	BIT(63 - 46)
 
-#ifndef __ASSEMBLY__
+#ifndef __ASSEMBLER__
 
 union mci {
 	unsigned long val;
@@ -104,5 +104,5 @@ void nmi_free_mcesa(u64 *mcesad);
 void s390_handle_mcck(void);
 void s390_do_machine_check(struct pt_regs *regs);
 
-#endif /* __ASSEMBLY__ */
+#endif /* __ASSEMBLER__ */
 #endif /* _ASM_S390_NMI_H */
diff --git a/arch/s390/include/asm/nospec-branch.h b/arch/s390/include/asm/nospec-branch.h
index c7c96282f011..81c4813cff18 100644
--- a/arch/s390/include/asm/nospec-branch.h
+++ b/arch/s390/include/asm/nospec-branch.h
@@ -2,7 +2,7 @@
 #ifndef _ASM_S390_EXPOLINE_H
 #define _ASM_S390_EXPOLINE_H
 
-#ifndef __ASSEMBLY__
+#ifndef __ASSEMBLER__
 
 #include <linux/types.h>
 #include <asm/facility.h>
@@ -42,6 +42,6 @@ void __s390_indirect_jump_r13(void);
 void __s390_indirect_jump_r14(void);
 void __s390_indirect_jump_r15(void);
 
-#endif /* __ASSEMBLY__ */
+#endif /* __ASSEMBLER__ */
 
 #endif /* _ASM_S390_EXPOLINE_H */
diff --git a/arch/s390/include/asm/nospec-insn.h b/arch/s390/include/asm/nospec-insn.h
index cb15dd25bf21..6ce6b56e282b 100644
--- a/arch/s390/include/asm/nospec-insn.h
+++ b/arch/s390/include/asm/nospec-insn.h
@@ -3,9 +3,10 @@
 #define _ASM_S390_NOSPEC_ASM_H
 
 #include <linux/linkage.h>
+#include <linux/export.h>
 #include <asm/dwarf.h>
 
-#ifdef __ASSEMBLY__
+#ifdef __ASSEMBLER__
 
 #ifdef CC_USING_EXPOLINE
 
@@ -128,6 +129,6 @@
 	.endm
 #endif /* CC_USING_EXPOLINE */
 
-#endif /* __ASSEMBLY__ */
+#endif /* __ASSEMBLER__ */
 
 #endif /* _ASM_S390_NOSPEC_ASM_H */
diff --git a/arch/s390/include/asm/page.h b/arch/s390/include/asm/page.h
index 4e5dbabdf202..9240a363c893 100644
--- a/arch/s390/include/asm/page.h
+++ b/arch/s390/include/asm/page.h
@@ -33,7 +33,7 @@
 #define HAVE_ARCH_HUGETLB_UNMAPPED_AREA
 
 #include <asm/setup.h>
-#ifndef __ASSEMBLY__
+#ifndef __ASSEMBLER__
 
 void __storage_key_init_range(unsigned long start, unsigned long end);
 
@@ -130,11 +130,19 @@ typedef pte_t *pgtable_t;
 static inline void page_set_storage_key(unsigned long addr,
 					unsigned char skey, int mapped)
 {
-	if (!mapped)
-		asm volatile(".insn rrf,0xb22b0000,%0,%1,8,0"
-			     : : "d" (skey), "a" (addr));
-	else
-		asm volatile("sske %0,%1" : : "d" (skey), "a" (addr));
+	if (!mapped) {
+		asm volatile(
+			"	.insn	rrf,0xb22b0000,%[skey],%[addr],8,0"
+			:
+			: [skey] "d" (skey), [addr] "a" (addr)
+			: "memory");
+	} else {
+		asm volatile(
+			"	sske	 %[skey],%[addr]"
+			:
+			: [skey] "d" (skey), [addr] "a" (addr)
+			: "memory");
+	}
 }
 
 static inline unsigned char page_get_storage_key(unsigned long addr)
@@ -274,7 +282,7 @@ static inline unsigned long virt_to_pfn(const void *kaddr)
 
 #define VM_DATA_DEFAULT_FLAGS	VM_DATA_FLAGS_NON_EXEC
 
-#endif /* !__ASSEMBLY__ */
+#endif /* !__ASSEMBLER__ */
 
 #include <asm-generic/memory_model.h>
 #include <asm-generic/getorder.h>
diff --git a/arch/s390/include/asm/processor.h b/arch/s390/include/asm/processor.h
index 6c8063cb8fe7..6a9c08b80eda 100644
--- a/arch/s390/include/asm/processor.h
+++ b/arch/s390/include/asm/processor.h
@@ -26,7 +26,7 @@
 
 #define RESTART_FLAG_CTLREGS	_AC(1 << 0, U)
 
-#ifndef __ASSEMBLY__
+#ifndef __ASSEMBLER__
 
 #include <linux/cpumask.h>
 #include <linux/linkage.h>
@@ -418,6 +418,6 @@ static __always_inline void bpon(void)
 		);
 }
 
-#endif /* __ASSEMBLY__ */
+#endif /* __ASSEMBLER__ */
 
 #endif /* __ASM_S390_PROCESSOR_H */
diff --git a/arch/s390/include/asm/ptrace.h b/arch/s390/include/asm/ptrace.h
index 0905fa99a31e..dfa770b15fad 100644
--- a/arch/s390/include/asm/ptrace.h
+++ b/arch/s390/include/asm/ptrace.h
@@ -54,7 +54,7 @@
 			 PSW_DEFAULT_KEY | PSW_MASK_BASE | PSW_MASK_MCHECK | \
 			 PSW_MASK_PSTATE | PSW_ASC_PRIMARY)
 
-#ifndef __ASSEMBLY__
+#ifndef __ASSEMBLER__
 
 struct psw_bits {
 	unsigned long	     :	1;
@@ -292,5 +292,5 @@ static inline void regs_set_return_value(struct pt_regs *regs, unsigned long rc)
 	regs->gprs[2] = rc;
 }
 
-#endif /* __ASSEMBLY__ */
+#endif /* __ASSEMBLER__ */
 #endif /* _S390_PTRACE_H */
diff --git a/arch/s390/include/asm/purgatory.h b/arch/s390/include/asm/purgatory.h
index e297bcfc476f..4c7a43bc43a1 100644
--- a/arch/s390/include/asm/purgatory.h
+++ b/arch/s390/include/asm/purgatory.h
@@ -7,11 +7,11 @@
 
 #ifndef _S390_PURGATORY_H_
 #define _S390_PURGATORY_H_
-#ifndef __ASSEMBLY__
+#ifndef __ASSEMBLER__
 
 #include <linux/purgatory.h>
 
 int verify_sha256_digest(void);
 
-#endif	/* __ASSEMBLY__ */
+#endif	/* __ASSEMBLER__ */
 #endif /* _S390_PURGATORY_H_ */
diff --git a/arch/s390/include/asm/sclp.h b/arch/s390/include/asm/sclp.h
index 1e62919bacf4..0f184dbdbe5e 100644
--- a/arch/s390/include/asm/sclp.h
+++ b/arch/s390/include/asm/sclp.h
@@ -21,7 +21,7 @@
 #define SCLP_ERRNOTIFY_AQ_INFO_LOG		2
 #define SCLP_ERRNOTIFY_AQ_OPTICS_DATA		3
 
-#ifndef __ASSEMBLY__
+#ifndef __ASSEMBLER__
 #include <linux/uio.h>
 #include <asm/chpid.h>
 #include <asm/cpu.h>
@@ -199,5 +199,5 @@ static inline int sclp_get_core_info(struct sclp_core_info *info, int early)
 	return _sclp_get_core_info(info);
 }
 
-#endif /* __ASSEMBLY__ */
+#endif /* __ASSEMBLER__ */
 #endif /* _ASM_S390_SCLP_H */
diff --git a/arch/s390/include/asm/setup.h b/arch/s390/include/asm/setup.h
index 031e881b4d88..7c57ac968bf6 100644
--- a/arch/s390/include/asm/setup.h
+++ b/arch/s390/include/asm/setup.h
@@ -24,7 +24,7 @@
 
 #define LEGACY_COMMAND_LINE_SIZE	896
 
-#ifndef __ASSEMBLY__
+#ifndef __ASSEMBLER__
 
 #include <asm/lowcore.h>
 #include <asm/types.h>
@@ -41,6 +41,8 @@ struct parmarea {
 	char command_line[COMMAND_LINE_SIZE];		/* 0x10480 */
 };
 
+extern char arch_hw_string[128];
+
 extern struct parmarea parmarea;
 
 extern unsigned int zlib_dfltcc_support;
@@ -100,5 +102,5 @@ static __always_inline u32 gen_lpswe(unsigned long addr)
 	BUILD_BUG_ON(addr > 0xfff);
 	return 0xb2b20000 | addr;
 }
-#endif /* __ASSEMBLY__ */
+#endif /* __ASSEMBLER__ */
 #endif /* _ASM_S390_SETUP_H */
diff --git a/arch/s390/include/asm/sigp.h b/arch/s390/include/asm/sigp.h
index 472943b77066..97d77868f83c 100644
--- a/arch/s390/include/asm/sigp.h
+++ b/arch/s390/include/asm/sigp.h
@@ -36,7 +36,7 @@
 #define SIGP_STATUS_INCORRECT_STATE	0x00000200UL
 #define SIGP_STATUS_NOT_RUNNING		0x00000400UL
 
-#ifndef __ASSEMBLY__
+#ifndef __ASSEMBLER__
 
 #include <asm/asm.h>
 
@@ -68,6 +68,6 @@ static inline int __pcpu_sigp(u16 addr, u8 order, unsigned long parm,
 	return cc;
 }
 
-#endif /* __ASSEMBLY__ */
+#endif /* __ASSEMBLER__ */
 
 #endif /* __S390_ASM_SIGP_H */
diff --git a/arch/s390/include/asm/skey.h b/arch/s390/include/asm/skey.h
new file mode 100644
index 000000000000..84e7cf28b712
--- /dev/null
+++ b/arch/s390/include/asm/skey.h
@@ -0,0 +1,32 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __ASM_SKEY_H
+#define __ASM_SKEY_H
+
+#include <asm/rwonce.h>
+
+struct skey_region {
+	unsigned long start;
+	unsigned long end;
+};
+
+#define SKEY_REGION(_start, _end)			\
+	stringify_in_c(.section .skey_region,"a";)	\
+	stringify_in_c(.balign 8;)			\
+	stringify_in_c(.quad (_start);)			\
+	stringify_in_c(.quad (_end);)			\
+	stringify_in_c(.previous)
+
+extern int skey_regions_initialized;
+extern struct skey_region __skey_region_start[];
+extern struct skey_region __skey_region_end[];
+
+void __skey_regions_initialize(void);
+
+static inline void skey_regions_initialize(void)
+{
+	if (READ_ONCE(skey_regions_initialized))
+		return;
+	__skey_regions_initialize();
+}
+
+#endif /* __ASM_SKEY_H */
diff --git a/arch/s390/include/asm/thread_info.h b/arch/s390/include/asm/thread_info.h
index 391eb04d26d8..f6ed2c8192c8 100644
--- a/arch/s390/include/asm/thread_info.h
+++ b/arch/s390/include/asm/thread_info.h
@@ -24,7 +24,7 @@
 
 #define STACK_INIT_OFFSET (THREAD_SIZE - STACK_FRAME_OVERHEAD - __PT_SIZE)
 
-#ifndef __ASSEMBLY__
+#ifndef __ASSEMBLER__
 
 /*
  * low level task data that entry.S needs immediate access to
diff --git a/arch/s390/include/asm/timex.h b/arch/s390/include/asm/timex.h
index bed8d0b5a282..59dfb8780f62 100644
--- a/arch/s390/include/asm/timex.h
+++ b/arch/s390/include/asm/timex.h
@@ -196,13 +196,6 @@ static inline unsigned long get_tod_clock_fast(void)
 	asm volatile("stckf %0" : "=Q" (clk) : : "cc");
 	return clk;
 }
-
-static inline cycles_t get_cycles(void)
-{
-	return (cycles_t) get_tod_clock() >> 2;
-}
-#define get_cycles get_cycles
-
 int get_phys_clock(unsigned long *clock);
 void init_cpu_timer(void);
 
@@ -230,6 +223,12 @@ static inline unsigned long get_tod_clock_monotonic(void)
 	return tod;
 }
 
+static inline cycles_t get_cycles(void)
+{
+	return (cycles_t)get_tod_clock_monotonic() >> 2;
+}
+#define get_cycles get_cycles
+
 /**
  * tod_to_ns - convert a TOD format value to nanoseconds
  * @todval: to be converted TOD format value
diff --git a/arch/s390/include/asm/tpi.h b/arch/s390/include/asm/tpi.h
index f76e5fdff23a..71c8b6f76cdd 100644
--- a/arch/s390/include/asm/tpi.h
+++ b/arch/s390/include/asm/tpi.h
@@ -5,7 +5,7 @@
 #include <linux/types.h>
 #include <uapi/asm/schid.h>
 
-#ifndef __ASSEMBLY__
+#ifndef __ASSEMBLER__
 
 /* I/O-Interruption Code as stored by TEST PENDING INTERRUPTION (TPI). */
 struct tpi_info {
@@ -32,6 +32,6 @@ struct tpi_adapter_info {
 	u32 :27;
 } __packed __aligned(4);
 
-#endif /* __ASSEMBLY__ */
+#endif /* __ASSEMBLER__ */
 
 #endif /* _ASM_S390_TPI_H */
diff --git a/arch/s390/include/asm/types.h b/arch/s390/include/asm/types.h
index 0b5d550a0478..53695b2196f7 100644
--- a/arch/s390/include/asm/types.h
+++ b/arch/s390/include/asm/types.h
@@ -5,7 +5,7 @@
 
 #include <uapi/asm/types.h>
 
-#ifndef __ASSEMBLY__
+#ifndef __ASSEMBLER__
 
 union register_pair {
 	unsigned __int128 pair;
@@ -15,5 +15,5 @@ union register_pair {
 	};
 };
 
-#endif /* __ASSEMBLY__ */
+#endif /* __ASSEMBLER__ */
 #endif /* _ASM_S390_TYPES_H */
diff --git a/arch/s390/include/asm/uaccess.h b/arch/s390/include/asm/uaccess.h
index a43fc88c0050..3e5b8b677057 100644
--- a/arch/s390/include/asm/uaccess.h
+++ b/arch/s390/include/asm/uaccess.h
@@ -473,188 +473,30 @@ do {									\
 
 void __cmpxchg_user_key_called_with_bad_pointer(void);
 
-#define CMPXCHG_USER_KEY_MAX_LOOPS 128
-
-static __always_inline int __cmpxchg_user_key(unsigned long address, void *uval,
-					      __uint128_t old, __uint128_t new,
-					      unsigned long key, int size)
+int __cmpxchg_user_key1(unsigned long address, unsigned char *uval,
+			unsigned char old, unsigned char new, unsigned long key);
+int __cmpxchg_user_key2(unsigned long address, unsigned short *uval,
+			unsigned short old, unsigned short new, unsigned long key);
+int __cmpxchg_user_key4(unsigned long address, unsigned int *uval,
+			unsigned int old, unsigned int new, unsigned long key);
+int __cmpxchg_user_key8(unsigned long address, unsigned long *uval,
+			unsigned long old, unsigned long new, unsigned long key);
+int __cmpxchg_user_key16(unsigned long address, __uint128_t *uval,
+			 __uint128_t old, __uint128_t new, unsigned long key);
+
+static __always_inline int _cmpxchg_user_key(unsigned long address, void *uval,
+					     __uint128_t old, __uint128_t new,
+					     unsigned long key, int size)
 {
-	bool sacf_flag;
-	int rc = 0;
-
 	switch (size) {
-	case 1: {
-		unsigned int prev, shift, mask, _old, _new;
-		unsigned long count;
-
-		shift = (3 ^ (address & 3)) << 3;
-		address ^= address & 3;
-		_old = ((unsigned int)old & 0xff) << shift;
-		_new = ((unsigned int)new & 0xff) << shift;
-		mask = ~(0xff << shift);
-		sacf_flag = enable_sacf_uaccess();
-		asm_inline volatile(
-			"	spka	0(%[key])\n"
-			"	sacf	256\n"
-			"	llill	%[count],%[max_loops]\n"
-			"0:	l	%[prev],%[address]\n"
-			"1:	nr	%[prev],%[mask]\n"
-			"	xilf	%[mask],0xffffffff\n"
-			"	or	%[new],%[prev]\n"
-			"	or	%[prev],%[tmp]\n"
-			"2:	lr	%[tmp],%[prev]\n"
-			"3:	cs	%[prev],%[new],%[address]\n"
-			"4:	jnl	5f\n"
-			"	xr	%[tmp],%[prev]\n"
-			"	xr	%[new],%[tmp]\n"
-			"	nr	%[tmp],%[mask]\n"
-			"	jnz	5f\n"
-			"	brct	%[count],2b\n"
-			"5:	sacf	768\n"
-			"	spka	%[default_key]\n"
-			EX_TABLE_UA_LOAD_REG(0b, 5b, %[rc], %[prev])
-			EX_TABLE_UA_LOAD_REG(1b, 5b, %[rc], %[prev])
-			EX_TABLE_UA_LOAD_REG(3b, 5b, %[rc], %[prev])
-			EX_TABLE_UA_LOAD_REG(4b, 5b, %[rc], %[prev])
-			: [rc] "+&d" (rc),
-			  [prev] "=&d" (prev),
-			  [address] "+Q" (*(int *)address),
-			  [tmp] "+&d" (_old),
-			  [new] "+&d" (_new),
-			  [mask] "+&d" (mask),
-			  [count] "=a" (count)
-			: [key] "%[count]" (key << 4),
-			  [default_key] "J" (PAGE_DEFAULT_KEY),
-			  [max_loops] "J" (CMPXCHG_USER_KEY_MAX_LOOPS)
-			: "memory", "cc");
-		disable_sacf_uaccess(sacf_flag);
-		*(unsigned char *)uval = prev >> shift;
-		if (!count)
-			rc = -EAGAIN;
-		return rc;
-	}
-	case 2: {
-		unsigned int prev, shift, mask, _old, _new;
-		unsigned long count;
-
-		shift = (2 ^ (address & 2)) << 3;
-		address ^= address & 2;
-		_old = ((unsigned int)old & 0xffff) << shift;
-		_new = ((unsigned int)new & 0xffff) << shift;
-		mask = ~(0xffff << shift);
-		sacf_flag = enable_sacf_uaccess();
-		asm_inline volatile(
-			"	spka	0(%[key])\n"
-			"	sacf	256\n"
-			"	llill	%[count],%[max_loops]\n"
-			"0:	l	%[prev],%[address]\n"
-			"1:	nr	%[prev],%[mask]\n"
-			"	xilf	%[mask],0xffffffff\n"
-			"	or	%[new],%[prev]\n"
-			"	or	%[prev],%[tmp]\n"
-			"2:	lr	%[tmp],%[prev]\n"
-			"3:	cs	%[prev],%[new],%[address]\n"
-			"4:	jnl	5f\n"
-			"	xr	%[tmp],%[prev]\n"
-			"	xr	%[new],%[tmp]\n"
-			"	nr	%[tmp],%[mask]\n"
-			"	jnz	5f\n"
-			"	brct	%[count],2b\n"
-			"5:	sacf	768\n"
-			"	spka	%[default_key]\n"
-			EX_TABLE_UA_LOAD_REG(0b, 5b, %[rc], %[prev])
-			EX_TABLE_UA_LOAD_REG(1b, 5b, %[rc], %[prev])
-			EX_TABLE_UA_LOAD_REG(3b, 5b, %[rc], %[prev])
-			EX_TABLE_UA_LOAD_REG(4b, 5b, %[rc], %[prev])
-			: [rc] "+&d" (rc),
-			  [prev] "=&d" (prev),
-			  [address] "+Q" (*(int *)address),
-			  [tmp] "+&d" (_old),
-			  [new] "+&d" (_new),
-			  [mask] "+&d" (mask),
-			  [count] "=a" (count)
-			: [key] "%[count]" (key << 4),
-			  [default_key] "J" (PAGE_DEFAULT_KEY),
-			  [max_loops] "J" (CMPXCHG_USER_KEY_MAX_LOOPS)
-			: "memory", "cc");
-		disable_sacf_uaccess(sacf_flag);
-		*(unsigned short *)uval = prev >> shift;
-		if (!count)
-			rc = -EAGAIN;
-		return rc;
-	}
-	case 4:	{
-		unsigned int prev = old;
-
-		sacf_flag = enable_sacf_uaccess();
-		asm_inline volatile(
-			"	spka	0(%[key])\n"
-			"	sacf	256\n"
-			"0:	cs	%[prev],%[new],%[address]\n"
-			"1:	sacf	768\n"
-			"	spka	%[default_key]\n"
-			EX_TABLE_UA_LOAD_REG(0b, 1b, %[rc], %[prev])
-			EX_TABLE_UA_LOAD_REG(1b, 1b, %[rc], %[prev])
-			: [rc] "+&d" (rc),
-			  [prev] "+&d" (prev),
-			  [address] "+Q" (*(int *)address)
-			: [new] "d" ((unsigned int)new),
-			  [key] "a" (key << 4),
-			  [default_key] "J" (PAGE_DEFAULT_KEY)
-			: "memory", "cc");
-		disable_sacf_uaccess(sacf_flag);
-		*(unsigned int *)uval = prev;
-		return rc;
-	}
-	case 8: {
-		unsigned long prev = old;
-
-		sacf_flag = enable_sacf_uaccess();
-		asm_inline volatile(
-			"	spka	0(%[key])\n"
-			"	sacf	256\n"
-			"0:	csg	%[prev],%[new],%[address]\n"
-			"1:	sacf	768\n"
-			"	spka	%[default_key]\n"
-			EX_TABLE_UA_LOAD_REG(0b, 1b, %[rc], %[prev])
-			EX_TABLE_UA_LOAD_REG(1b, 1b, %[rc], %[prev])
-			: [rc] "+&d" (rc),
-			  [prev] "+&d" (prev),
-			  [address] "+QS" (*(long *)address)
-			: [new] "d" ((unsigned long)new),
-			  [key] "a" (key << 4),
-			  [default_key] "J" (PAGE_DEFAULT_KEY)
-			: "memory", "cc");
-		disable_sacf_uaccess(sacf_flag);
-		*(unsigned long *)uval = prev;
-		return rc;
-	}
-	case 16: {
-		__uint128_t prev = old;
-
-		sacf_flag = enable_sacf_uaccess();
-		asm_inline volatile(
-			"	spka	0(%[key])\n"
-			"	sacf	256\n"
-			"0:	cdsg	%[prev],%[new],%[address]\n"
-			"1:	sacf	768\n"
-			"	spka	%[default_key]\n"
-			EX_TABLE_UA_LOAD_REGPAIR(0b, 1b, %[rc], %[prev])
-			EX_TABLE_UA_LOAD_REGPAIR(1b, 1b, %[rc], %[prev])
-			: [rc] "+&d" (rc),
-			  [prev] "+&d" (prev),
-			  [address] "+QS" (*(__int128_t *)address)
-			: [new] "d" (new),
-			  [key] "a" (key << 4),
-			  [default_key] "J" (PAGE_DEFAULT_KEY)
-			: "memory", "cc");
-		disable_sacf_uaccess(sacf_flag);
-		*(__uint128_t *)uval = prev;
-		return rc;
-	}
+	case 1:  return __cmpxchg_user_key1(address, uval, old, new, key);
+	case 2:  return __cmpxchg_user_key2(address, uval, old, new, key);
+	case 4:  return __cmpxchg_user_key4(address, uval, old, new, key);
+	case 8:  return __cmpxchg_user_key8(address, uval, old, new, key);
+	case 16: return __cmpxchg_user_key16(address, uval, old, new, key);
+	default: __cmpxchg_user_key_called_with_bad_pointer();
 	}
-	__cmpxchg_user_key_called_with_bad_pointer();
-	return rc;
+	return 0;
 }
 
 /**
@@ -686,8 +528,8 @@ static __always_inline int __cmpxchg_user_key(unsigned long address, void *uval,
 	BUILD_BUG_ON(sizeof(*(__ptr)) != sizeof(*(__uval)));		\
 	might_fault();							\
 	__chk_user_ptr(__ptr);						\
-	__cmpxchg_user_key((unsigned long)(__ptr), (void *)(__uval),	\
-			   (old), (new), (key), sizeof(*(__ptr)));	\
+	_cmpxchg_user_key((unsigned long)(__ptr), (void *)(__uval),	\
+			  (old), (new), (key), sizeof(*(__ptr)));	\
 })
 
 #endif /* __S390_UACCESS_H */
diff --git a/arch/s390/include/asm/vdso.h b/arch/s390/include/asm/vdso.h
index 420a073fdde5..8e2fffa0ca68 100644
--- a/arch/s390/include/asm/vdso.h
+++ b/arch/s390/include/asm/vdso.h
@@ -4,11 +4,11 @@
 
 #include <vdso/datapage.h>
 
-#ifndef __ASSEMBLY__
+#ifndef __ASSEMBLER__
 
 int vdso_getcpu_init(void);
 
-#endif /* __ASSEMBLY__ */
+#endif /* __ASSEMBLER__ */
 
 #define __VDSO_PAGES	4
 
diff --git a/arch/s390/include/asm/vdso/getrandom.h b/arch/s390/include/asm/vdso/getrandom.h
index f8713ce39bb2..6741a27199f8 100644
--- a/arch/s390/include/asm/vdso/getrandom.h
+++ b/arch/s390/include/asm/vdso/getrandom.h
@@ -3,7 +3,7 @@
 #ifndef __ASM_VDSO_GETRANDOM_H
 #define __ASM_VDSO_GETRANDOM_H
 
-#ifndef __ASSEMBLY__
+#ifndef __ASSEMBLER__
 
 #include <vdso/datapage.h>
 #include <asm/vdso/vsyscall.h>
@@ -23,6 +23,6 @@ static __always_inline ssize_t getrandom_syscall(void *buffer, size_t len, unsig
 	return syscall3(__NR_getrandom, (long)buffer, (long)len, (long)flags);
 }
 
-#endif /* !__ASSEMBLY__ */
+#endif /* !__ASSEMBLER__ */
 
 #endif /* __ASM_VDSO_GETRANDOM_H */
diff --git a/arch/s390/include/asm/vdso/gettimeofday.h b/arch/s390/include/asm/vdso/gettimeofday.h
index fb4564308e9d..c31ac5f61c83 100644
--- a/arch/s390/include/asm/vdso/gettimeofday.h
+++ b/arch/s390/include/asm/vdso/gettimeofday.h
@@ -16,13 +16,7 @@
 
 static inline u64 __arch_get_hw_counter(s32 clock_mode, const struct vdso_time_data *vd)
 {
-	u64 adj, now;
-
-	now = get_tod_clock();
-	adj = vd->arch_data.tod_steering_end - now;
-	if (unlikely((s64) adj > 0))
-		now += (vd->arch_data.tod_steering_delta < 0) ? (adj >> 15) : -(adj >> 15);
-	return now;
+	return get_tod_clock() - vd->arch_data.tod_delta;
 }
 
 static __always_inline
diff --git a/arch/s390/include/asm/vdso/time_data.h b/arch/s390/include/asm/vdso/time_data.h
index 8a08752422e6..25c4e0d9f596 100644
--- a/arch/s390/include/asm/vdso/time_data.h
+++ b/arch/s390/include/asm/vdso/time_data.h
@@ -5,8 +5,7 @@
 #include <linux/types.h>
 
 struct arch_vdso_time_data {
-	__s64 tod_steering_delta;
-	__u64 tod_steering_end;
+	__s64 tod_delta;
 };
 
 #endif /* __S390_ASM_VDSO_TIME_DATA_H */
diff --git a/arch/s390/include/asm/vdso/vsyscall.h b/arch/s390/include/asm/vdso/vsyscall.h
index d346ebe51301..b00acec8ddbc 100644
--- a/arch/s390/include/asm/vdso/vsyscall.h
+++ b/arch/s390/include/asm/vdso/vsyscall.h
@@ -2,7 +2,7 @@
 #ifndef __ASM_VDSO_VSYSCALL_H
 #define __ASM_VDSO_VSYSCALL_H
 
-#ifndef __ASSEMBLY__
+#ifndef __ASSEMBLER__
 
 #include <linux/hrtimer.h>
 #include <vdso/datapage.h>
@@ -11,6 +11,6 @@
 /* The asm-generic header needs to be included after the definitions above */
 #include <asm-generic/vdso/vsyscall.h>
 
-#endif /* !__ASSEMBLY__ */
+#endif /* !__ASSEMBLER__ */
 
 #endif /* __ASM_VDSO_VSYSCALL_H */