s390 updates for 5.18-rc3

- Convert current_stack_pointer to a register alias like it is assumed if
   ARCH_HAS_CURRENT_STACK_POINTER is selected. The existing implementation
   as a function breaks CONFIG_HARDENED_USERCOPY sanity-checks.
 
 - Get rid of -Warray-bounds warning within kexec code.
 
 - Add minimal IBM z16 support by reporting a proper elf platform, and
   adding compile options.
 
 - Update defconfigs.
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Merge tag 's390-5.18-3' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux

Pull s390 fixes from Heiko Carstens:

 - Convert current_stack_pointer to a register alias like it is assumed
   if ARCH_HAS_CURRENT_STACK_POINTER is selected. The existing
   implementation as a function breaks CONFIG_HARDENED_USERCOPY
   sanity-checks

 - Get rid of -Warray-bounds warning within kexec code

 - Add minimal IBM z16 support by reporting a proper elf platform, and
   adding compile options

 - Update defconfigs

* tag 's390-5.18-3' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
  s390: enable CONFIG_HARDENED_USERCOPY in debug_defconfig
  s390: current_stack_pointer shouldn't be a function
  s390: update defconfigs
  s390/kexec: silence -Warray-bounds warning
  s390: allow to compile with z16 optimizations
  s390: add z16 elf platform

arch/s390/Kconfig

@@ -255,6 +255,10 @@ config HAVE_MARCH_Z15_FEATURES
 	def_bool n
 	select HAVE_MARCH_Z14_FEATURES
 
+config HAVE_MARCH_Z16_FEATURES
+	def_bool n
+	select HAVE_MARCH_Z15_FEATURES
+
 choice
 	prompt "Processor type"
 	default MARCH_Z196
@@ -312,6 +316,14 @@ config MARCH_Z15
 	  and 8561 series). The kernel will be slightly faster but will not
 	  work on older machines.
 
+config MARCH_Z16
+	bool "IBM z16"
+	select HAVE_MARCH_Z16_FEATURES
+	depends on $(cc-option,-march=z16)
+	help
+	  Select this to enable optimizations for IBM z16 (3931 and
+	  3932 series).
+
 endchoice
 
 config MARCH_Z10_TUNE
@@ -332,6 +344,9 @@ config MARCH_Z14_TUNE
 config MARCH_Z15_TUNE
 	def_bool TUNE_Z15 || MARCH_Z15 && TUNE_DEFAULT
 
+config MARCH_Z16_TUNE
+	def_bool TUNE_Z16 || MARCH_Z16 && TUNE_DEFAULT
+
 choice
 	prompt "Tune code generation"
 	default TUNE_DEFAULT
@@ -372,6 +387,10 @@ config TUNE_Z15
 	bool "IBM z15"
 	depends on $(cc-option,-mtune=z15)
 
+config TUNE_Z16
+	bool "IBM z16"
+	depends on $(cc-option,-mtune=z16)
+
 endchoice
 
 config 64BIT

arch/s390/Makefile

@@ -42,6 +42,7 @@ mflags-$(CONFIG_MARCH_ZEC12)  := -march=zEC12
 mflags-$(CONFIG_MARCH_Z13)    := -march=z13
 mflags-$(CONFIG_MARCH_Z14)    := -march=z14
 mflags-$(CONFIG_MARCH_Z15)    := -march=z15
+mflags-$(CONFIG_MARCH_Z16)    := -march=z16
 
 export CC_FLAGS_MARCH := $(mflags-y)
 
@@ -54,6 +55,7 @@ cflags-$(CONFIG_MARCH_ZEC12_TUNE)	+= -mtune=zEC12
 cflags-$(CONFIG_MARCH_Z13_TUNE)		+= -mtune=z13
 cflags-$(CONFIG_MARCH_Z14_TUNE)		+= -mtune=z14
 cflags-$(CONFIG_MARCH_Z15_TUNE)		+= -mtune=z15
+cflags-$(CONFIG_MARCH_Z16_TUNE)		+= -mtune=z16
 
 cflags-y += -Wa,-I$(srctree)/arch/$(ARCH)/include
 

arch/s390/configs/debug_defconfig

@@ -499,11 +499,13 @@ CONFIG_NLMON=m
 # CONFIG_NET_VENDOR_CHELSIO is not set
 # CONFIG_NET_VENDOR_CISCO is not set
 # CONFIG_NET_VENDOR_CORTINA is not set
+# CONFIG_NET_VENDOR_DAVICOM is not set
 # CONFIG_NET_VENDOR_DEC is not set
 # CONFIG_NET_VENDOR_DLINK is not set
 # CONFIG_NET_VENDOR_EMULEX is not set
 # CONFIG_NET_VENDOR_ENGLEDER is not set
 # CONFIG_NET_VENDOR_EZCHIP is not set
+# CONFIG_NET_VENDOR_FUNGIBLE is not set
 # CONFIG_NET_VENDOR_GOOGLE is not set
 # CONFIG_NET_VENDOR_HUAWEI is not set
 # CONFIG_NET_VENDOR_INTEL is not set
@@ -588,13 +590,13 @@ CONFIG_MLX5_INFINIBAND=m
 CONFIG_SYNC_FILE=y
 CONFIG_VFIO=m
 CONFIG_VFIO_PCI=m
+CONFIG_MLX5_VFIO_PCI=m
 CONFIG_VFIO_MDEV=m
 CONFIG_VIRTIO_PCI=m
 CONFIG_VIRTIO_BALLOON=m
 CONFIG_VIRTIO_INPUT=y
 CONFIG_VHOST_NET=m
 CONFIG_VHOST_VSOCK=m
-# CONFIG_SURFACE_PLATFORMS is not set
 CONFIG_S390_CCW_IOMMU=y
 CONFIG_S390_AP_IOMMU=y
 CONFIG_EXT4_FS=y
@@ -690,6 +692,7 @@ CONFIG_ENCRYPTED_KEYS=m
 CONFIG_KEY_NOTIFICATIONS=y
 CONFIG_SECURITY=y
 CONFIG_SECURITY_NETWORK=y
+CONFIG_HARDENED_USERCOPY=y
 CONFIG_FORTIFY_SOURCE=y
 CONFIG_SECURITY_SELINUX=y
 CONFIG_SECURITY_SELINUX_BOOTPARAM=y
@@ -733,6 +736,7 @@ CONFIG_CRYPTO_MD5=y
 CONFIG_CRYPTO_MICHAEL_MIC=m
 CONFIG_CRYPTO_RMD160=m
 CONFIG_CRYPTO_SHA3=m
+CONFIG_CRYPTO_SM3=m
 CONFIG_CRYPTO_WP512=m
 CONFIG_CRYPTO_AES_TI=m
 CONFIG_CRYPTO_ANUBIS=m
@@ -786,7 +790,6 @@ CONFIG_DMA_CMA=y
 CONFIG_CMA_SIZE_MBYTES=0
 CONFIG_PRINTK_TIME=y
 CONFIG_DYNAMIC_DEBUG=y
-CONFIG_DEBUG_INFO=y
 CONFIG_DEBUG_INFO_DWARF4=y
 CONFIG_DEBUG_INFO_BTF=y
 CONFIG_GDB_SCRIPTS=y
@@ -814,6 +817,7 @@ CONFIG_DEBUG_MEMORY_INIT=y
 CONFIG_MEMORY_NOTIFIER_ERROR_INJECT=m
 CONFIG_DEBUG_PER_CPU_MAPS=y
 CONFIG_KFENCE=y
+CONFIG_KFENCE_DEFERRABLE=y
 CONFIG_KFENCE_STATIC_KEYS=y
 CONFIG_DEBUG_SHIRQ=y
 CONFIG_PANIC_ON_OOPS=y

arch/s390/configs/defconfig

@@ -490,11 +490,13 @@ CONFIG_NLMON=m
 # CONFIG_NET_VENDOR_CHELSIO is not set
 # CONFIG_NET_VENDOR_CISCO is not set
 # CONFIG_NET_VENDOR_CORTINA is not set
+# CONFIG_NET_VENDOR_DAVICOM is not set
 # CONFIG_NET_VENDOR_DEC is not set
 # CONFIG_NET_VENDOR_DLINK is not set
 # CONFIG_NET_VENDOR_EMULEX is not set
 # CONFIG_NET_VENDOR_ENGLEDER is not set
 # CONFIG_NET_VENDOR_EZCHIP is not set
+# CONFIG_NET_VENDOR_FUNGIBLE is not set
 # CONFIG_NET_VENDOR_GOOGLE is not set
 # CONFIG_NET_VENDOR_HUAWEI is not set
 # CONFIG_NET_VENDOR_INTEL is not set
@@ -578,13 +580,13 @@ CONFIG_MLX5_INFINIBAND=m
 CONFIG_SYNC_FILE=y
 CONFIG_VFIO=m
 CONFIG_VFIO_PCI=m
+CONFIG_MLX5_VFIO_PCI=m
 CONFIG_VFIO_MDEV=m
 CONFIG_VIRTIO_PCI=m
 CONFIG_VIRTIO_BALLOON=m
 CONFIG_VIRTIO_INPUT=y
 CONFIG_VHOST_NET=m
 CONFIG_VHOST_VSOCK=m
-# CONFIG_SURFACE_PLATFORMS is not set
 CONFIG_S390_CCW_IOMMU=y
 CONFIG_S390_AP_IOMMU=y
 CONFIG_EXT4_FS=y
@@ -720,6 +722,7 @@ CONFIG_CRYPTO_MD5=y
 CONFIG_CRYPTO_MICHAEL_MIC=m
 CONFIG_CRYPTO_RMD160=m
 CONFIG_CRYPTO_SHA3=m
+CONFIG_CRYPTO_SM3=m
 CONFIG_CRYPTO_WP512=m
 CONFIG_CRYPTO_AES_TI=m
 CONFIG_CRYPTO_ANUBIS=m
@@ -772,7 +775,6 @@ CONFIG_DMA_CMA=y
 CONFIG_CMA_SIZE_MBYTES=0
 CONFIG_PRINTK_TIME=y
 CONFIG_DYNAMIC_DEBUG=y
-CONFIG_DEBUG_INFO=y
 CONFIG_DEBUG_INFO_DWARF4=y
 CONFIG_DEBUG_INFO_BTF=y
 CONFIG_GDB_SCRIPTS=y

arch/s390/configs/zfcpdump_defconfig

@@ -26,6 +26,7 @@ CONFIG_CRASH_DUMP=y
 # CONFIG_S390_GUEST is not set
 # CONFIG_SECCOMP is not set
 # CONFIG_GCC_PLUGINS is not set
+# CONFIG_BLOCK_LEGACY_AUTOLOAD is not set
 CONFIG_PARTITION_ADVANCED=y
 # CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS is not set
 # CONFIG_COMPACTION is not set
@@ -60,7 +61,6 @@ CONFIG_ZFCP=y
 # CONFIG_HID is not set
 # CONFIG_VIRTIO_MENU is not set
 # CONFIG_VHOST_MENU is not set
-# CONFIG_SURFACE_PLATFORMS is not set
 # CONFIG_IOMMU_SUPPORT is not set
 # CONFIG_DNOTIFY is not set
 # CONFIG_INOTIFY_USER is not set
@@ -71,10 +71,10 @@ CONFIG_LSM="yama,loadpin,safesetid,integrity"
 CONFIG_XZ_DEC_MICROLZMA=y
 CONFIG_PRINTK_TIME=y
 # CONFIG_SYMBOLIC_ERRNAME is not set
-CONFIG_DEBUG_INFO=y
+CONFIG_DEBUG_KERNEL=y
+CONFIG_DEBUG_INFO_DWARF4=y
 CONFIG_DEBUG_INFO_BTF=y
 CONFIG_DEBUG_FS=y
-CONFIG_DEBUG_KERNEL=y
 CONFIG_PANIC_ON_OOPS=y
 # CONFIG_SCHED_DEBUG is not set
 CONFIG_RCU_CPU_STALL_TIMEOUT=60

arch/s390/include/asm/entry-common.h

@@ -58,7 +58,7 @@ static inline void arch_exit_to_user_mode_prepare(struct pt_regs *regs,
 
 static inline bool on_thread_stack(void)
 {
-	return !(((unsigned long)(current->stack) ^ current_stack_pointer()) & ~(THREAD_SIZE - 1));
+	return !(((unsigned long)(current->stack) ^ current_stack_pointer) & ~(THREAD_SIZE - 1));
 }
 
 #endif

arch/s390/include/asm/processor.h

@@ -200,13 +200,7 @@ unsigned long __get_wchan(struct task_struct *p);
 /* Has task runtime instrumentation enabled ? */
 #define is_ri_task(tsk) (!!(tsk)->thread.ri_cb)
 
-static __always_inline unsigned long current_stack_pointer(void)
+register unsigned long current_stack_pointer asm("r15");
-{
-	unsigned long sp;
-
-	asm volatile("la %0,0(15)" : "=a" (sp));
-	return sp;
-}
 
 static __always_inline unsigned short stap(void)
 {

arch/s390/include/asm/stacktrace.h

@@ -46,7 +46,7 @@ struct stack_frame {
 };
 
 /*
- * Unlike current_stack_pointer() which simply returns current value of %r15
+ * Unlike current_stack_pointer which simply contains the current value of %r15
  * current_frame_address() returns function stack frame address, which matches
  * %r15 upon function invocation. It may differ from %r15 later if function
  * allocates stack for local variables or new stack frame to call other

arch/s390/kernel/machine_kexec.c

@@ -54,7 +54,7 @@ static void __do_machine_kdump(void *image)
 	 * This need to be done *after* s390_reset_system set the
 	 * prefix register of this CPU to zero
 	 */
-	memcpy((void *) __LC_FPREGS_SAVE_AREA,
+	memcpy(absolute_pointer(__LC_FPREGS_SAVE_AREA),
 	       (void *)(prefix + __LC_FPREGS_SAVE_AREA), 512);
 
 	__load_psw_mask(PSW_MASK_BASE | PSW_DEFAULT_KEY | PSW_MASK_EA | PSW_MASK_BA);

arch/s390/kernel/processor.c

@@ -283,6 +283,10 @@ static int __init setup_elf_platform(void)
 	case 0x8562:
 		strcpy(elf_platform, "z15");
 		break;
+	case 0x3931:
+	case 0x3932:
+		strcpy(elf_platform, "z16");
+		break;
 	}
 	return 0;
 }

arch/s390/lib/test_unwind.c

@@ -147,7 +147,7 @@ static __always_inline struct pt_regs fake_pt_regs(void)
 	struct pt_regs regs;
 
 	memset(&regs, 0, sizeof(regs));
-	regs.gprs[15] = current_stack_pointer();
+	regs.gprs[15] = current_stack_pointer;
 
 	asm volatile(
 		"basr	%[psw_addr],0\n"