Merge tag 's390-5.18-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux

Pull s390 updates from Vasily Gorbik:

 - Raise minimum supported machine generation to z10, which comes with
   various cleanups and code simplifications (usercopy/spectre
   mitigation/etc).

 - Rework extables and get rid of anonymous out-of-line fixups.

 - Page table helpers cleanup. Add set_pXd()/set_pte() helper functions.
   Covert pte_val()/pXd_val() macros to functions.

 - Optimize kretprobe handling by avoiding extra kprobe on
   __kretprobe_trampoline.

 - Add support for CEX8 crypto cards.

 - Allow to trigger AP bus rescan via writing to /sys/bus/ap/scans.

 - Add CONFIG_EXPOLINE_EXTERN option to build the kernel without COMDAT
   group sections which simplifies kpatch support.

 - Always use the packed stack layout and extend kernel unwinder tests.

 - Add sanity checks for ftrace code patching.

 - Add s390dbf debug log for the vfio_ap device driver.

 - Various virtual vs physical address confusion fixes.

 - Various small fixes and improvements all over the code.

* tag 's390-5.18-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (69 commits)
  s390/test_unwind: add kretprobe tests
  s390/kprobes: Avoid additional kprobe in kretprobe handling
  s390: convert ".insn" encoding to instruction names
  s390: assume stckf is always present
  s390/nospec: move to single register thunks
  s390: raise minimum supported machine generation to z10
  s390/uaccess: Add copy_from/to_user_key functions
  s390/nospec: align and size extern thunks
  s390/nospec: add an option to use thunk-extern
  s390/nospec: generate single register thunks if possible
  s390/pci: make zpci_set_irq()/zpci_clear_irq() static
  s390: remove unused expoline to BC instructions
  s390/irq: use assignment instead of cast
  s390/traps: get rid of magic cast for per code
  s390/traps: get rid of magic cast for program interruption code
  s390/signal: fix typo in comments
  s390/asm-offsets: remove unused defines
  s390/test_unwind: avoid build warning with W=1
  s390: remove .fixup section
  s390/bpf: encode register within extable entry
  ...

1 files changed, 53 insertions, 0 deletions

diff --git a/arch/s390/include/asm/asm-extable.h b/arch/s390/include/asm/asm-extable.h
new file mode 100644
index 000000000000..fb62df5e16a2
--- /dev/null
+++ b/arch/s390/include/asm/asm-extable.h
@@ -0,0 +1,53 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __ASM_EXTABLE_H
+#define __ASM_EXTABLE_H
+
+#include <linux/stringify.h>
+#include <asm/asm-const.h>
+
+#define EX_TYPE_NONE	0
+#define EX_TYPE_FIXUP	1
+#define EX_TYPE_BPF	2
+#define EX_TYPE_UACCESS	3
+
+#define __EX_TABLE(_section, _fault, _target, _type)			\
+	stringify_in_c(.section	_section,"a";)				\
+	stringify_in_c(.align	4;)					\
+	stringify_in_c(.long	(_fault) - .;)				\
+	stringify_in_c(.long	(_target) - .;)				\
+	stringify_in_c(.short	(_type);)				\
+	stringify_in_c(.short	0;)					\
+	stringify_in_c(.previous)
+
+#define __EX_TABLE_UA(_section, _fault, _target, _type, _reg)		\
+	stringify_in_c(.section _section,"a";)				\
+	stringify_in_c(.align	4;)					\
+	stringify_in_c(.long	(_fault) - .;)				\
+	stringify_in_c(.long	(_target) - .;)				\
+	stringify_in_c(.short	(_type);)				\
+	stringify_in_c(.macro extable_reg reg;)				\
+	stringify_in_c(.set found, 0;)					\
+	stringify_in_c(.set regnr, 0;)					\
+	stringify_in_c(.irp rs,r0,r1,r2,r3,r4,r5,r6,r7,r8,r9,r10,r11,r12,r13,r14,r15;) \
+	stringify_in_c(.ifc "\reg", "%%\rs";)				\
+	stringify_in_c(.set found, 1;)					\
+	stringify_in_c(.short regnr;)					\
+	stringify_in_c(.endif;)						\
+	stringify_in_c(.set regnr, regnr+1;)				\
+	stringify_in_c(.endr;)						\
+	stringify_in_c(.ifne (found != 1);)				\
+	stringify_in_c(.error "extable_reg: bad register argument";)	\
+	stringify_in_c(.endif;)						\
+	stringify_in_c(.endm;)						\
+	stringify_in_c(extable_reg _reg;)				\
+	stringify_in_c(.purgem extable_reg;)				\
+	stringify_in_c(.previous)
+
+#define EX_TABLE(_fault, _target)					\
+	__EX_TABLE(__ex_table, _fault, _target, EX_TYPE_FIXUP)
+#define EX_TABLE_AMODE31(_fault, _target)				\
+	__EX_TABLE(.amode31.ex_table, _fault, _target, EX_TYPE_FIXUP)
+#define EX_TABLE_UA(_fault, _target, _reg)				\
+	__EX_TABLE_UA(__ex_table, _fault, _target, EX_TYPE_UACCESS, _reg)
+
+#endif /* __ASM_EXTABLE_H */