Merge tag 's390-7.0-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux

Pull s390 updates from Heiko Carstens:

 - Drop support for outdated 3590/3592 and 3480 tape devices, and limit
   support to virtualized 3490E types devices

 - Implement exception based WARN() and WARN_ONCE() similar to x86

 - Slightly optimize preempt primitives like __preempt_count_add() and
   __preempt_count_dec_and_test()

 - A couple of small fixes and improvements

* tag 's390-7.0-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (35 commits)
  s390/tape: Consolidate tape config options and modules
  s390/cio: Fix device lifecycle handling in css_alloc_subchannel()
  s390/tape: Rename tape_34xx.c to tape_3490.c
  s390/tape: Cleanup sense data analysis and error handling
  s390/tape: Remove 3480 tape device type
  s390/tape: Remove unused command definitions
  s390/tape: Remove special block id handling
  s390/tape: Remove tape load display support
  s390/tape: Remove support for 3590/3592 models
  s390/kexec: Emit an error message when cmdline is too long
  s390/configs: Enable BLK_DEV_NULL_BLK as module
  s390: Document s390 stackprotector support
  s390/perf: Disable register readout on sampling events
  s390/Kconfig: Define non-zero ILLEGAL_POINTER_VALUE
  s390/bug: Prevent tail-call optimization
  s390/bug: Skip __WARN_trap() in call traces
  s390/bug: Implement WARN_ONCE()
  s390/bug: Implement __WARN_printf()
  s390/traps: Copy monitor code to pt_regs
  s390/bug: Introduce and use monitor code macro
  ...

Author: torvalds

Documentation/arch/s390/mm.rst

@@ -109,3 +109,7 @@ Virtual memory layout
 		     |	 KASAN shadow	| KASAN untracked
 		     |			|
 		     +------------------+ ASCE limit
+		     |			|
+		     | CONFIG_ILLEGAL_POINTER_VALUE causes memory access fault
+		     |			|
+		     +------------------+

Documentation/features/debug/stackprotector/arch-support.txt

@@ -21,7 +21,7 @@
     |      parisc: | TODO |
     |     powerpc: |  ok  |
     |       riscv: |  ok  |
-    |        s390: | TODO |
+    |        s390: |  ok  |
     |          sh: |  ok  |
     |       sparc: | TODO |
     |          um: | TODO |

arch/s390/Kconfig

@@ -69,6 +69,12 @@ config CC_HAS_ASM_AOR_FORMAT_FLAGS
 	  Clang versions before 19.1.0 do not support A,
 	  O, and R inline assembly format flags.
 
+config CC_HAS_ASM_IMMEDIATE_STRINGS
+	def_bool !(CC_IS_GCC && GCC_VERSION < 90000)
+	help
+	  GCC versions before 9.0.0 cannot handle strings as immediate
+	  input operands in inline assemblies.
+
 config CC_HAS_STACKPROTECTOR_GLOBAL
 	def_bool $(cc-option, -mstack-protector-guard=global -mstack-protector-guard-record)
 
@@ -85,6 +91,7 @@ config S390
 	select ARCH_ENABLE_MEMORY_HOTREMOVE
 	select ARCH_ENABLE_SPLIT_PMD_PTLOCK if PGTABLE_LEVELS > 2
 	select ARCH_ENABLE_THP_MIGRATION if TRANSPARENT_HUGEPAGE
+	select ARCH_HAS_CC_CAN_LINK
 	select ARCH_HAS_CPU_FINALIZE_INIT
 	select ARCH_HAS_CURRENT_STACK_POINTER
 	select ARCH_HAS_DEBUG_VIRTUAL
@@ -294,6 +301,14 @@ config PGTABLE_LEVELS
 
 source "kernel/livepatch/Kconfig"
 
+config ARCH_CC_CAN_LINK
+	bool
+	default $(cc_can_link_user,-m64)
+
+config ARCH_USERFLAGS
+	string
+	default "-m64"
+
 config ARCH_SUPPORTS_KEXEC
 	def_bool y
 
@@ -704,6 +719,10 @@ config ARCH_SPARSEMEM_ENABLE
 config ARCH_SPARSEMEM_DEFAULT
 	def_bool y
 
+config ILLEGAL_POINTER_VALUE
+	hex
+	default 0xdead000000000000
+
 config MAX_PHYSMEM_BITS
 	int "Maximum size of supported physical memory in bits (42-53)"
 	range 42 53

arch/s390/boot/Makefile

@@ -21,6 +21,7 @@ KBUILD_AFLAGS := $(filter-out $(CC_FLAGS_MARCH),$(KBUILD_AFLAGS_DECOMPRESSOR))
 KBUILD_CFLAGS := $(filter-out $(CC_FLAGS_MARCH),$(KBUILD_CFLAGS_DECOMPRESSOR))
 KBUILD_AFLAGS += $(CC_FLAGS_MARCH_MINIMUM) -D__DISABLE_EXPORTS
 KBUILD_CFLAGS += $(CC_FLAGS_MARCH_MINIMUM) -D__DISABLE_EXPORTS
+KBUILD_CFLAGS += $(call cc-option, -Wno-default-const-init-unsafe)
 
 CFLAGS_sclp_early_core.o += -I$(srctree)/drivers/s390/char
 

arch/s390/boot/startup.c

@@ -336,6 +336,7 @@ static unsigned long setup_kernel_memory_layout(unsigned long kernel_size)
 	BUILD_BUG_ON(!IS_ALIGNED(TEXT_OFFSET, THREAD_SIZE));
 	BUILD_BUG_ON(!IS_ALIGNED(__NO_KASLR_START_KERNEL, THREAD_SIZE));
 	BUILD_BUG_ON(__NO_KASLR_END_KERNEL > _REGION1_SIZE);
+	BUILD_BUG_ON(CONFIG_ILLEGAL_POINTER_VALUE < _REGION1_SIZE);
 	vsize = get_vmem_size(ident_map_size, vmemmap_size, vmalloc_size, _REGION3_SIZE);
 	boot_debug("vmem size estimated: 0x%016lx\n", vsize);
 	if (IS_ENABLED(CONFIG_KASAN) || __NO_KASLR_END_KERNEL > _REGION2_SIZE ||

arch/s390/configs/debug_defconfig

@@ -446,6 +446,7 @@ CONFIG_BLK_DEV_RAM_SIZE=32768
 CONFIG_VIRTIO_BLK=y
 CONFIG_BLK_DEV_RBD=m
 CONFIG_BLK_DEV_NVME=m
+CONFIG_BLK_DEV_NULL_BLK=m
 CONFIG_ENCLOSURE_SERVICES=m
 CONFIG_GENWQE=m
 CONFIG_RAID_ATTRS=m

arch/s390/configs/defconfig

@@ -436,6 +436,7 @@ CONFIG_BLK_DEV_RAM_SIZE=32768
 CONFIG_VIRTIO_BLK=y
 CONFIG_BLK_DEV_RBD=m
 CONFIG_BLK_DEV_NVME=m
+CONFIG_BLK_DEV_NULL_BLK=m
 CONFIG_ENCLOSURE_SERVICES=m
 CONFIG_GENWQE=m
 CONFIG_RAID_ATTRS=m

arch/s390/include/asm/ap.h

@@ -78,7 +78,7 @@ union ap_queue_status_reg {
 };
 
 /**
- * ap_intructions_available() - Test if AP instructions are available.
+ * ap_instructions_available() - Test if AP instructions are available.
  *
  * Returns true if the AP instructions are installed, otherwise false.
  */

arch/s390/include/asm/asm-prototypes.h

@@ -3,6 +3,7 @@
 
 #include <linux/kvm_host.h>
 #include <linux/ftrace.h>
+#include <asm/bug.h>
 #include <asm/fpu.h>
 #include <asm/nospec-branch.h>
 #include <asm-generic/asm-prototypes.h>

arch/s390/include/asm/asm.h

@@ -30,7 +30,7 @@
  */
 #if defined(__GCC_ASM_FLAG_OUTPUTS__) && !(IS_ENABLED(CONFIG_CC_ASM_FLAG_OUTPUT_BROKEN))
 
-#define __HAVE_ASM_FLAG_OUTPUTS__
+#define __HAVE_ASM_FLAG_OUTPUTS__ 1
 
 #define CC_IPM(sym)
 #define CC_OUT(sym, var)	"=@cc" (var)