Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux

Pull more s390 updates from Martin Schwidefsky:
 "There is one larger patch for the AP bus code to make it work with the
  longer reset periods of the latest crypto cards.

  A new default configuration, a naming cleanup for SMP and a few fixes"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
  s390/kdump: fix compile for !SMP
  s390/kdump: fix nosmt kernel parameter
  s390: new default configuration
  s390/smp: cleanup core vs. cpu in the SCLP interface
  s390/smp: fix sigp cpu detection loop
  s390/zcrypt: Fixed reset and interrupt handling of AP queues
  s390/kdump: fix REGSET_VX_LOW vector register ELF notes
  s390/bpf: Fix backward jumps

arch/s390/configs/default_defconfig

@@ -17,13 +17,15 @@ CONFIG_CGROUP_FREEZER=y
 CONFIG_CGROUP_DEVICE=y
 CONFIG_CPUSETS=y
 CONFIG_CGROUP_CPUACCT=y
-CONFIG_RESOURCE_COUNTERS=y
 CONFIG_CGROUP_PERF=y
 CONFIG_CFS_BANDWIDTH=y
 CONFIG_RT_GROUP_SCHED=y
 CONFIG_BLK_CGROUP=y
+CONFIG_NAMESPACES=y
 CONFIG_SCHED_AUTOGROUP=y
 CONFIG_BLK_DEV_INITRD=y
+CONFIG_EXPERT=y
+CONFIG_BPF_SYSCALL=y
 # CONFIG_COMPAT_BRK is not set
 CONFIG_PROFILING=y
 CONFIG_OPROFILE=m
@@ -44,6 +46,7 @@ CONFIG_SOLARIS_X86_PARTITION=y
 CONFIG_UNIXWARE_DISKLABEL=y
 CONFIG_CFQ_GROUP_IOSCHED=y
 CONFIG_DEFAULT_DEADLINE=y
+CONFIG_LIVEPATCH=y
 CONFIG_MARCH_Z196=y
 CONFIG_TUNE_ZEC12=y
 CONFIG_NR_CPUS=256
@@ -242,9 +245,9 @@ CONFIG_NF_CONNTRACK_IPV4=m
 # CONFIG_NF_CONNTRACK_PROC_COMPAT is not set
 CONFIG_NF_TABLES_IPV4=m
 CONFIG_NFT_CHAIN_ROUTE_IPV4=m
-CONFIG_NFT_CHAIN_NAT_IPV4=m
 CONFIG_NF_TABLES_ARP=m
 CONFIG_NF_NAT_IPV4=m
+CONFIG_NFT_CHAIN_NAT_IPV4=m
 CONFIG_IP_NF_IPTABLES=m
 CONFIG_IP_NF_MATCH_AH=m
 CONFIG_IP_NF_MATCH_ECN=m
@@ -264,8 +267,8 @@ CONFIG_IP_NF_ARP_MANGLE=m
 CONFIG_NF_CONNTRACK_IPV6=m
 CONFIG_NF_TABLES_IPV6=m
 CONFIG_NFT_CHAIN_ROUTE_IPV6=m
-CONFIG_NFT_CHAIN_NAT_IPV6=m
 CONFIG_NF_NAT_IPV6=m
+CONFIG_NFT_CHAIN_NAT_IPV6=m
 CONFIG_IP6_NF_IPTABLES=m
 CONFIG_IP6_NF_MATCH_AH=m
 CONFIG_IP6_NF_MATCH_EUI64=m
@@ -353,7 +356,6 @@ CONFIG_BLK_DEV_NBD=m
 CONFIG_BLK_DEV_OSD=m
 CONFIG_BLK_DEV_RAM=y
 CONFIG_BLK_DEV_RAM_SIZE=32768
-CONFIG_BLK_DEV_XIP=y
 CONFIG_CDROM_PKTCDVD=m
 CONFIG_ATA_OVER_ETH=m
 CONFIG_VIRTIO_BLK=y
@@ -458,7 +460,6 @@ CONFIG_EXT2_FS=y
 CONFIG_EXT2_FS_XATTR=y
 CONFIG_EXT2_FS_POSIX_ACL=y
 CONFIG_EXT2_FS_SECURITY=y
-CONFIG_EXT2_FS_XIP=y
 CONFIG_EXT3_FS=y
 # CONFIG_EXT3_DEFAULTS_TO_ORDERED is not set
 CONFIG_EXT3_FS_POSIX_ACL=y
@@ -544,7 +545,6 @@ CONFIG_FRAME_WARN=1024
 CONFIG_READABLE_ASM=y
 CONFIG_UNUSED_SYMBOLS=y
 CONFIG_MAGIC_SYSRQ=y
-CONFIG_DEBUG_KERNEL=y
 CONFIG_DEBUG_PAGEALLOC=y
 CONFIG_DEBUG_OBJECTS=y
 CONFIG_DEBUG_OBJECTS_SELFTEST=y
@@ -558,6 +558,7 @@ CONFIG_SLUB_STATS=y
 CONFIG_DEBUG_STACK_USAGE=y
 CONFIG_DEBUG_VM=y
 CONFIG_DEBUG_VM_RB=y
+CONFIG_DEBUG_MEMORY_INIT=y
 CONFIG_MEMORY_NOTIFIER_ERROR_INJECT=m
 CONFIG_DEBUG_PER_CPU_MAPS=y
 CONFIG_DEBUG_SHIRQ=y
@@ -575,7 +576,6 @@ CONFIG_DEBUG_LIST=y
 CONFIG_DEBUG_SG=y
 CONFIG_DEBUG_NOTIFIERS=y
 CONFIG_DEBUG_CREDENTIALS=y
-CONFIG_PROVE_RCU=y
 CONFIG_RCU_TORTURE_TEST=m
 CONFIG_RCU_CPU_STALL_TIMEOUT=300
 CONFIG_NOTIFIER_ERROR_INJECTION=m
@@ -611,7 +611,6 @@ CONFIG_TEST_BPF=m
 # CONFIG_STRICT_DEVMEM is not set
 CONFIG_S390_PTDUMP=y
 CONFIG_ENCRYPTED_KEYS=m
-CONFIG_KEYS_DEBUG_PROC_KEYS=y
 CONFIG_SECURITY=y
 CONFIG_SECURITY_NETWORK=y
 CONFIG_SECURITY_SELINUX=y

arch/s390/configs/gcov_defconfig

@@ -17,11 +17,13 @@ CONFIG_CGROUP_FREEZER=y
 CONFIG_CGROUP_DEVICE=y
 CONFIG_CPUSETS=y
 CONFIG_CGROUP_CPUACCT=y
-CONFIG_RESOURCE_COUNTERS=y
 CONFIG_CGROUP_PERF=y
 CONFIG_BLK_CGROUP=y
+CONFIG_NAMESPACES=y
 CONFIG_SCHED_AUTOGROUP=y
 CONFIG_BLK_DEV_INITRD=y
+CONFIG_EXPERT=y
+CONFIG_BPF_SYSCALL=y
 # CONFIG_COMPAT_BRK is not set
 CONFIG_PROFILING=y
 CONFIG_OPROFILE=m
@@ -240,9 +242,9 @@ CONFIG_NF_CONNTRACK_IPV4=m
 # CONFIG_NF_CONNTRACK_PROC_COMPAT is not set
 CONFIG_NF_TABLES_IPV4=m
 CONFIG_NFT_CHAIN_ROUTE_IPV4=m
-CONFIG_NFT_CHAIN_NAT_IPV4=m
 CONFIG_NF_TABLES_ARP=m
 CONFIG_NF_NAT_IPV4=m
+CONFIG_NFT_CHAIN_NAT_IPV4=m
 CONFIG_IP_NF_IPTABLES=m
 CONFIG_IP_NF_MATCH_AH=m
 CONFIG_IP_NF_MATCH_ECN=m
@@ -262,8 +264,8 @@ CONFIG_IP_NF_ARP_MANGLE=m
 CONFIG_NF_CONNTRACK_IPV6=m
 CONFIG_NF_TABLES_IPV6=m
 CONFIG_NFT_CHAIN_ROUTE_IPV6=m
-CONFIG_NFT_CHAIN_NAT_IPV6=m
 CONFIG_NF_NAT_IPV6=m
+CONFIG_NFT_CHAIN_NAT_IPV6=m
 CONFIG_IP6_NF_IPTABLES=m
 CONFIG_IP6_NF_MATCH_AH=m
 CONFIG_IP6_NF_MATCH_EUI64=m
@@ -350,7 +352,6 @@ CONFIG_BLK_DEV_NBD=m
 CONFIG_BLK_DEV_OSD=m
 CONFIG_BLK_DEV_RAM=y
 CONFIG_BLK_DEV_RAM_SIZE=32768
-CONFIG_BLK_DEV_XIP=y
 CONFIG_CDROM_PKTCDVD=m
 CONFIG_ATA_OVER_ETH=m
 CONFIG_VIRTIO_BLK=y
@@ -455,7 +456,6 @@ CONFIG_EXT2_FS=y
 CONFIG_EXT2_FS_XATTR=y
 CONFIG_EXT2_FS_POSIX_ACL=y
 CONFIG_EXT2_FS_SECURITY=y
-CONFIG_EXT2_FS_XIP=y
 CONFIG_EXT3_FS=y
 # CONFIG_EXT3_DEFAULTS_TO_ORDERED is not set
 CONFIG_EXT3_FS_POSIX_ACL=y
@@ -538,7 +538,7 @@ CONFIG_DEBUG_INFO=y
 CONFIG_FRAME_WARN=1024
 CONFIG_UNUSED_SYMBOLS=y
 CONFIG_MAGIC_SYSRQ=y
-CONFIG_DEBUG_KERNEL=y
+CONFIG_DEBUG_MEMORY_INIT=y
 CONFIG_MEMORY_NOTIFIER_ERROR_INJECT=m
 CONFIG_PANIC_ON_OOPS=y
 CONFIG_TIMER_STATS=y
@@ -558,7 +558,6 @@ CONFIG_ATOMIC64_SELFTEST=y
 # CONFIG_STRICT_DEVMEM is not set
 CONFIG_S390_PTDUMP=y
 CONFIG_ENCRYPTED_KEYS=m
-CONFIG_KEYS_DEBUG_PROC_KEYS=y
 CONFIG_SECURITY=y
 CONFIG_SECURITY_NETWORK=y
 CONFIG_SECURITY_SELINUX=y

arch/s390/configs/performance_defconfig

@@ -17,11 +17,13 @@ CONFIG_CGROUP_FREEZER=y
 CONFIG_CGROUP_DEVICE=y
 CONFIG_CPUSETS=y
 CONFIG_CGROUP_CPUACCT=y
-CONFIG_RESOURCE_COUNTERS=y
 CONFIG_CGROUP_PERF=y
 CONFIG_BLK_CGROUP=y
+CONFIG_NAMESPACES=y
 CONFIG_SCHED_AUTOGROUP=y
 CONFIG_BLK_DEV_INITRD=y
+CONFIG_EXPERT=y
+CONFIG_BPF_SYSCALL=y
 # CONFIG_COMPAT_BRK is not set
 CONFIG_PROFILING=y
 CONFIG_OPROFILE=m
@@ -42,9 +44,10 @@ CONFIG_SOLARIS_X86_PARTITION=y
 CONFIG_UNIXWARE_DISKLABEL=y
 CONFIG_CFQ_GROUP_IOSCHED=y
 CONFIG_DEFAULT_DEADLINE=y
+CONFIG_LIVEPATCH=y
 CONFIG_MARCH_Z196=y
 CONFIG_TUNE_ZEC12=y
-CONFIG_NR_CPUS=256
+CONFIG_NR_CPUS=512
 CONFIG_HZ_100=y
 CONFIG_MEMORY_HOTPLUG=y
 CONFIG_MEMORY_HOTREMOVE=y
@@ -238,9 +241,9 @@ CONFIG_NF_CONNTRACK_IPV4=m
 # CONFIG_NF_CONNTRACK_PROC_COMPAT is not set
 CONFIG_NF_TABLES_IPV4=m
 CONFIG_NFT_CHAIN_ROUTE_IPV4=m
-CONFIG_NFT_CHAIN_NAT_IPV4=m
 CONFIG_NF_TABLES_ARP=m
 CONFIG_NF_NAT_IPV4=m
+CONFIG_NFT_CHAIN_NAT_IPV4=m
 CONFIG_IP_NF_IPTABLES=m
 CONFIG_IP_NF_MATCH_AH=m
 CONFIG_IP_NF_MATCH_ECN=m
@@ -260,8 +263,8 @@ CONFIG_IP_NF_ARP_MANGLE=m
 CONFIG_NF_CONNTRACK_IPV6=m
 CONFIG_NF_TABLES_IPV6=m
 CONFIG_NFT_CHAIN_ROUTE_IPV6=m
-CONFIG_NFT_CHAIN_NAT_IPV6=m
 CONFIG_NF_NAT_IPV6=m
+CONFIG_NFT_CHAIN_NAT_IPV6=m
 CONFIG_IP6_NF_IPTABLES=m
 CONFIG_IP6_NF_MATCH_AH=m
 CONFIG_IP6_NF_MATCH_EUI64=m
@@ -348,7 +351,6 @@ CONFIG_BLK_DEV_NBD=m
 CONFIG_BLK_DEV_OSD=m
 CONFIG_BLK_DEV_RAM=y
 CONFIG_BLK_DEV_RAM_SIZE=32768
-CONFIG_BLK_DEV_XIP=y
 CONFIG_CDROM_PKTCDVD=m
 CONFIG_ATA_OVER_ETH=m
 CONFIG_VIRTIO_BLK=y
@@ -453,7 +455,6 @@ CONFIG_EXT2_FS=y
 CONFIG_EXT2_FS_XATTR=y
 CONFIG_EXT2_FS_POSIX_ACL=y
 CONFIG_EXT2_FS_SECURITY=y
-CONFIG_EXT2_FS_XIP=y
 CONFIG_EXT3_FS=y
 # CONFIG_EXT3_DEFAULTS_TO_ORDERED is not set
 CONFIG_EXT3_FS_POSIX_ACL=y
@@ -536,7 +537,7 @@ CONFIG_DEBUG_INFO=y
 CONFIG_FRAME_WARN=1024
 CONFIG_UNUSED_SYMBOLS=y
 CONFIG_MAGIC_SYSRQ=y
-CONFIG_DEBUG_KERNEL=y
+CONFIG_DEBUG_MEMORY_INIT=y
 CONFIG_PANIC_ON_OOPS=y
 CONFIG_TIMER_STATS=y
 CONFIG_RCU_TORTURE_TEST=m
@@ -553,7 +554,6 @@ CONFIG_ATOMIC64_SELFTEST=y
 # CONFIG_STRICT_DEVMEM is not set
 CONFIG_S390_PTDUMP=y
 CONFIG_ENCRYPTED_KEYS=m
-CONFIG_KEYS_DEBUG_PROC_KEYS=y
 CONFIG_SECURITY=y
 CONFIG_SECURITY_NETWORK=y
 CONFIG_SECURITY_SELINUX=y

arch/s390/defconfig

@@ -8,7 +8,6 @@ CONFIG_TASKSTATS=y
 CONFIG_TASK_DELAY_ACCT=y
 CONFIG_TASK_XACCT=y
 CONFIG_TASK_IO_ACCOUNTING=y
-CONFIG_RCU_FAST_NO_HZ=y
 CONFIG_IKCONFIG=y
 CONFIG_IKCONFIG_PROC=y
 CONFIG_CGROUPS=y
@@ -31,9 +30,11 @@ CONFIG_JUMP_LABEL=y
 CONFIG_MODULES=y
 CONFIG_MODULE_UNLOAD=y
 CONFIG_MODVERSIONS=y
+CONFIG_BLK_DEV_INTEGRITY=y
 CONFIG_PARTITION_ADVANCED=y
 CONFIG_IBM_PARTITION=y
 CONFIG_DEFAULT_DEADLINE=y
+CONFIG_LIVEPATCH=y
 CONFIG_MARCH_Z196=y
 CONFIG_NR_CPUS=256
 CONFIG_HZ_100=y
@@ -41,7 +42,6 @@ CONFIG_MEMORY_HOTPLUG=y
 CONFIG_MEMORY_HOTREMOVE=y
 CONFIG_KSM=y
 CONFIG_TRANSPARENT_HUGEPAGE=y
-CONFIG_CMA=y
 CONFIG_CRASH_DUMP=y
 CONFIG_BINFMT_MISC=m
 CONFIG_HIBERNATION=y
@@ -125,6 +125,7 @@ CONFIG_DEBUG_FORCE_WEAK_PER_CPU=y
 CONFIG_MAGIC_SYSRQ=y
 CONFIG_DEBUG_PAGEALLOC=y
 CONFIG_DETECT_HUNG_TASK=y
+CONFIG_PANIC_ON_OOPS=y
 CONFIG_TIMER_STATS=y
 CONFIG_DEBUG_RT_MUTEXES=y
 CONFIG_PROVE_LOCKING=y
@@ -135,12 +136,16 @@ CONFIG_DEBUG_LIST=y
 CONFIG_DEBUG_PI_LIST=y
 CONFIG_DEBUG_SG=y
 CONFIG_DEBUG_NOTIFIERS=y
-CONFIG_PROVE_RCU=y
 CONFIG_RCU_CPU_STALL_TIMEOUT=60
+# CONFIG_RCU_CPU_STALL_INFO is not set
 CONFIG_RCU_TRACE=y
 CONFIG_LATENCYTOP=y
 CONFIG_DEBUG_STRICT_USER_COPY_CHECKS=y
+CONFIG_TRACER_SNAPSHOT=y
+CONFIG_TRACER_SNAPSHOT_PER_CPU_SWAP=y
+CONFIG_STACK_TRACER=y
 CONFIG_BLK_DEV_IO_TRACE=y
+CONFIG_UPROBE_EVENT=y
 CONFIG_KPROBES_SANITY_TEST=y
 # CONFIG_STRICT_DEVMEM is not set
 CONFIG_S390_PTDUMP=y
@@ -187,6 +192,7 @@ CONFIG_CRYPTO_ZLIB=m
 CONFIG_CRYPTO_LZO=m
 CONFIG_CRYPTO_LZ4=m
 CONFIG_CRYPTO_LZ4HC=m
+CONFIG_CRYPTO_ANSI_CPRNG=m
 CONFIG_ZCRYPT=m
 CONFIG_CRYPTO_SHA1_S390=m
 CONFIG_CRYPTO_SHA256_S390=m

arch/s390/include/asm/cpu.h

@@ -8,8 +8,6 @@
 #ifndef _ASM_S390_CPU_H
 #define _ASM_S390_CPU_H
 
-#define MAX_CPU_ADDRESS 255
-
 #ifndef __ASSEMBLY__
 
 #include <linux/types.h>

arch/s390/include/asm/ipl.h

@@ -94,7 +94,6 @@ struct dump_save_areas {
 };
 
 extern struct dump_save_areas dump_save_areas;
-struct save_area_ext *dump_save_area_create(int cpu);
 
 extern void do_reipl(void);
 extern void do_halt(void);

arch/s390/include/asm/sclp.h

@@ -11,6 +11,7 @@
 #include <asm/cpu.h>
 
 #define SCLP_CHP_INFO_MASK_SIZE		32
+#define SCLP_MAX_CORES			256
 
 struct sclp_chp_info {
 	u8 recognized[SCLP_CHP_INFO_MASK_SIZE];
@@ -26,7 +27,7 @@ struct sclp_ipl_info {
 	char loadparm[LOADPARM_LEN];
 };
 
-struct sclp_cpu_entry {
+struct sclp_core_entry {
 	u8 core_id;
 	u8 reserved0[2];
 	u8 : 3;
@@ -38,12 +39,11 @@ struct sclp_cpu_entry {
 	u8 reserved1;
 } __attribute__((packed));
 
-struct sclp_cpu_info {
+struct sclp_core_info {
 	unsigned int configured;
 	unsigned int standby;
 	unsigned int combined;
-	int has_cpu_type;
-	struct sclp_cpu_entry cpu[MAX_CPU_ADDRESS + 1];
+	struct sclp_core_entry core[SCLP_MAX_CORES];
 };
 
 struct sclp_info {
@@ -51,7 +51,7 @@ struct sclp_info {
 	unsigned char has_vt220 : 1;
 	unsigned char has_siif : 1;
 	unsigned char has_sigpif : 1;
-	unsigned char has_cpu_type : 1;
+	unsigned char has_core_type : 1;
 	unsigned char has_sprp : 1;
 	unsigned int ibc;
 	unsigned int mtid;
@@ -60,15 +60,15 @@ struct sclp_info {
 	unsigned long long rzm;
 	unsigned long long rnmax;
 	unsigned long long hamax;
-	unsigned int max_cpu;
+	unsigned int max_cores;
 	unsigned long hsa_size;
 	unsigned long long facilities;
 };
 extern struct sclp_info sclp;
 
-int sclp_get_cpu_info(struct sclp_cpu_info *info);
-int sclp_cpu_configure(u8 cpu);
-int sclp_cpu_deconfigure(u8 cpu);
+int sclp_get_core_info(struct sclp_core_info *info);
+int sclp_core_configure(u8 core);
+int sclp_core_deconfigure(u8 core);
 int sclp_sdias_blk_count(void);
 int sclp_sdias_copy(void *dest, int blk_num, int nr_blks);
 int sclp_chp_configure(struct chp_id chpid);

arch/s390/include/asm/smp.h

@@ -29,6 +29,7 @@ extern void smp_call_ipl_cpu(void (*func)(void *), void *);
 
 extern int smp_find_processor_id(u16 address);
 extern int smp_store_status(int cpu);
+extern void smp_save_dump_cpus(void);
 extern int smp_vcpu_scheduled(int cpu);
 extern void smp_yield_cpu(int cpu);
 extern void smp_cpu_set_polarization(int cpu, int val);
@@ -54,6 +55,7 @@ static inline int smp_store_status(int cpu) { return 0; }
 static inline int smp_vcpu_scheduled(int cpu) { return 1; }
 static inline void smp_yield_cpu(int cpu) { }
 static inline void smp_fill_possible_mask(void) { }
+static inline void smp_save_dump_cpus(void) { }
 
 #endif /* CONFIG_SMP */
 

arch/s390/kernel/base.S

@@ -78,15 +78,20 @@ s390_base_pgm_handler_fn:
 #
 # Calls diag 308 subcode 1 and continues execution
 #
-# The following conditions must be ensured before calling this function:
-# * Prefix register = 0
-# * Lowcore protection is disabled
-#
 ENTRY(diag308_reset)
 	larl	%r4,.Lctlregs		# Save control registers
 	stctg	%c0,%c15,0(%r4)
+	lg	%r2,0(%r4)		# Disable lowcore protection
+	nilh	%r2,0xefff
+	larl	%r4,.Lctlreg0
+	stg	%r2,0(%r4)
+	lctlg	%c0,%c0,0(%r4)
 	larl	%r4,.Lfpctl		# Floating point control register
 	stfpc	0(%r4)
+	larl	%r4,.Lprefix		# Save prefix register
+	stpx	0(%r4)
+	larl	%r4,.Lprefix_zero	# Set prefix register to 0
+	spx	0(%r4)
 	larl	%r4,.Lcontinue_psw	# Save PSW flags
 	epsw	%r2,%r3
 	stm	%r2,%r3,0(%r4)
@@ -106,6 +111,8 @@ ENTRY(diag308_reset)
 	lctlg	%c0,%c15,0(%r4)
 	larl	%r4,.Lfpctl		# Restore floating point ctl register
 	lfpc	0(%r4)
+	larl	%r4,.Lprefix		# Restore prefix register
+	spx	0(%r4)
 	larl	%r4,.Lcontinue_psw	# Restore PSW flags
 	lpswe	0(%r4)
 .Lcontinue:
@@ -122,10 +129,16 @@ ENTRY(diag308_reset)
 
 	.section .bss
 .align 8
+.Lctlreg0:
+	.quad	0
 .Lctlregs:
 	.rept	16
 	.quad	0
 	.endr
 .Lfpctl:
 	.long	0
+.Lprefix:
+	.long	0
+.Lprefix_zero:
+	.long	0
 	.previous

arch/s390/kernel/crash_dump.c

@@ -44,31 +44,6 @@ static struct memblock_type oldmem_type = {
 
 struct dump_save_areas dump_save_areas;
 
-/*
- * Allocate and add a save area for a CPU
- */
-struct save_area_ext *dump_save_area_create(int cpu)
-{
-	struct save_area_ext **save_areas, *save_area;
-
-	save_area = kmalloc(sizeof(*save_area), GFP_KERNEL);
-	if (!save_area)
-		return NULL;
-	if (cpu + 1 > dump_save_areas.count) {
-		dump_save_areas.count = cpu + 1;
-		save_areas = krealloc(dump_save_areas.areas,
-				      dump_save_areas.count * sizeof(void *),
-				      GFP_KERNEL | __GFP_ZERO);
-		if (!save_areas) {
-			kfree(save_area);
-			return NULL;
-		}
-		dump_save_areas.areas = save_areas;
-	}
-	dump_save_areas.areas[cpu] = save_area;
-	return save_area;
-}
-
 /*
  * Return physical address for virtual address
  */
@@ -416,7 +391,7 @@ static void *nt_s390_vx_low(void *ptr, __vector128 *vx_regs)
 	ptr += len;
 	/* Copy lower halves of SIMD registers 0-15 */
 	for (i = 0; i < 16; i++) {
-		memcpy(ptr, &vx_regs[i], 8);
+		memcpy(ptr, &vx_regs[i].u[2], 8);
 		ptr += 8;
 	}
 	return ptr;

arch/s390/kernel/setup.c

@@ -868,6 +868,11 @@ void __init setup_arch(char **cmdline_p)
 
 	check_initrd();
 	reserve_crashkernel();
+	/*
+	 * Be aware that smp_save_dump_cpus() triggers a system reset.
+	 * Therefore CPU and device initialization should be done afterwards.
+	 */
+	smp_save_dump_cpus();
 
 	setup_resources();
 	setup_vmcoreinfo();

arch/s390/kernel/smp.c

@@ -31,6 +31,7 @@
 #include <linux/cpu.h>
 #include <linux/slab.h>
 #include <linux/crash_dump.h>
+#include <linux/memblock.h>
 #include <asm/asm-offsets.h>
 #include <asm/switch_to.h>
 #include <asm/facility.h>
@@ -69,7 +70,7 @@ struct pcpu {
 	u16 address;			/* physical cpu address */
 };
 
-static u8 boot_cpu_type;
+static u8 boot_core_type;
 static struct pcpu pcpu_devices[NR_CPUS];
 
 unsigned int smp_cpu_mt_shift;
@@ -531,15 +532,12 @@ EXPORT_SYMBOL(smp_ctl_clear_bit);
 
 #ifdef CONFIG_CRASH_DUMP
 
-static inline void __smp_store_cpu_state(int cpu, u16 address, int is_boot_cpu)
+static void __smp_store_cpu_state(struct save_area_ext *sa_ext, u16 address,
+				  int is_boot_cpu)
 {
-	void *lc = pcpu_devices[0].lowcore;
-	struct save_area_ext *sa_ext;
+	void *lc = (void *)(unsigned long) store_prefix();
 	unsigned long vx_sa;
 
-	sa_ext = dump_save_area_create(cpu);
-	if (!sa_ext)
-		panic("could not allocate memory for save area\n");
 	if (is_boot_cpu) {
 		/* Copy the registers of the boot CPU. */
 		copy_oldmem_page(1, (void *) &sa_ext->sa, sizeof(sa_ext->sa),
@@ -554,14 +552,33 @@ static inline void __smp_store_cpu_state(int cpu, u16 address, int is_boot_cpu)
 	if (!MACHINE_HAS_VX)
 		return;
 	/* Get the VX registers */
-	vx_sa = __get_free_page(GFP_KERNEL);
+	vx_sa = memblock_alloc(PAGE_SIZE, PAGE_SIZE);
 	if (!vx_sa)
 		panic("could not allocate memory for VX save area\n");
 	__pcpu_sigp_relax(address, SIGP_STORE_ADDITIONAL_STATUS, vx_sa, NULL);
 	memcpy(sa_ext->vx_regs, (void *) vx_sa, sizeof(sa_ext->vx_regs));
-	free_page(vx_sa);
+	memblock_free(vx_sa, PAGE_SIZE);
 }
 
+int smp_store_status(int cpu)
+{
+	unsigned long vx_sa;
+	struct pcpu *pcpu;
+
+	pcpu = pcpu_devices + cpu;
+	if (__pcpu_sigp_relax(pcpu->address, SIGP_STOP_AND_STORE_STATUS,
+			      0, NULL) != SIGP_CC_ORDER_CODE_ACCEPTED)
+		return -EIO;
+	if (!MACHINE_HAS_VX)
+		return 0;
+	vx_sa = __pa(pcpu->lowcore->vector_save_area_addr);
+	__pcpu_sigp_relax(pcpu->address, SIGP_STORE_ADDITIONAL_STATUS,
+			  vx_sa, NULL);
+	return 0;
+}
+
+#endif /* CONFIG_CRASH_DUMP */
+
 /*
  * Collect CPU state of the previous, crashed system.
  * There are four cases:
@@ -589,10 +606,12 @@ static inline void __smp_store_cpu_state(int cpu, u16 address, int is_boot_cpu)
  *    old system. The ELF sections are picked up by the crash_dump code
  *    via elfcorehdr_addr.
  */
-static void __init smp_store_cpu_states(struct sclp_cpu_info *info)
+void __init smp_save_dump_cpus(void)
 {
-	unsigned int cpu, address, i, j;
-	int is_boot_cpu;
+#ifdef CONFIG_CRASH_DUMP
+	int addr, cpu, boot_cpu_addr, max_cpu_addr;
+	struct save_area_ext *sa_ext;
+	bool is_boot_cpu;
 
 	if (is_kdump_kernel())
 		/* Previous system stored the CPU states. Nothing to do. */
@@ -602,42 +621,36 @@ static void __init smp_store_cpu_states(struct sclp_cpu_info *info)
 		return;
 	/* Set multi-threading state to the previous system. */
 	pcpu_set_smt(sclp.mtid_prev);
-	/* Collect CPU states. */
-	cpu = 0;
-	for (i = 0; i < info->configured; i++) {
-		/* Skip CPUs with different CPU type. */
-		if (info->has_cpu_type && info->cpu[i].type != boot_cpu_type)
+	max_cpu_addr = SCLP_MAX_CORES << sclp.mtid_prev;
+	for (cpu = 0, addr = 0; addr <= max_cpu_addr; addr++) {
+		if (__pcpu_sigp_relax(addr, SIGP_SENSE, 0, NULL) ==
+		    SIGP_CC_NOT_OPERATIONAL)
 			continue;
-		for (j = 0; j <= smp_cpu_mtid; j++, cpu++) {
-			address = (info->cpu[i].core_id << smp_cpu_mt_shift) + j;
-			is_boot_cpu = (address == pcpu_devices[0].address);
-			if (is_boot_cpu && !OLDMEM_BASE)
-				/* Skip boot CPU for standard zfcp dump. */
-				continue;
-			/* Get state for this CPu. */
-			__smp_store_cpu_state(cpu, address, is_boot_cpu);
-		}
+		cpu += 1;
 	}
-}
-
-int smp_store_status(int cpu)
-{
-	unsigned long vx_sa;
-	struct pcpu *pcpu;
-
-	pcpu = pcpu_devices + cpu;
-	if (__pcpu_sigp_relax(pcpu->address, SIGP_STOP_AND_STORE_STATUS,
-			      0, NULL) != SIGP_CC_ORDER_CODE_ACCEPTED)
-		return -EIO;
-	if (!MACHINE_HAS_VX)
-		return 0;
-	vx_sa = __pa(pcpu->lowcore->vector_save_area_addr);
-	__pcpu_sigp_relax(pcpu->address, SIGP_STORE_ADDITIONAL_STATUS,
-			  vx_sa, NULL);
-	return 0;
-}
-
+	dump_save_areas.areas = (void *)memblock_alloc(sizeof(void *) * cpu, 8);
+	dump_save_areas.count = cpu;
+	boot_cpu_addr = stap();
+	for (cpu = 0, addr = 0; addr <= max_cpu_addr; addr++) {
+		if (__pcpu_sigp_relax(addr, SIGP_SENSE, 0, NULL) ==
+		    SIGP_CC_NOT_OPERATIONAL)
+			continue;
+		sa_ext = (void *) memblock_alloc(sizeof(*sa_ext), 8);
+		dump_save_areas.areas[cpu] = sa_ext;
+		if (!sa_ext)
+			panic("could not allocate memory for save area\n");
+		is_boot_cpu = (addr == boot_cpu_addr);
+		cpu += 1;
+		if (is_boot_cpu && !OLDMEM_BASE)
+			/* Skip boot CPU for standard zfcp dump. */
+			continue;
+		/* Get state for this CPU. */
+		__smp_store_cpu_state(sa_ext, addr, is_boot_cpu);
+	}
+	diag308_reset();
+	pcpu_set_smt(0);
 #endif /* CONFIG_CRASH_DUMP */
+}
 
 void smp_cpu_set_polarization(int cpu, int val)
 {
@@ -649,21 +662,22 @@ int smp_cpu_get_polarization(int cpu)
 	return pcpu_devices[cpu].polarization;
 }
 
-static struct sclp_cpu_info *smp_get_cpu_info(void)
+static struct sclp_core_info *smp_get_core_info(void)
 {
 	static int use_sigp_detection;
-	struct sclp_cpu_info *info;
+	struct sclp_core_info *info;
 	int address;
 
 	info = kzalloc(sizeof(*info), GFP_KERNEL);
-	if (info && (use_sigp_detection || sclp_get_cpu_info(info))) {
+	if (info && (use_sigp_detection || sclp_get_core_info(info))) {
 		use_sigp_detection = 1;
-		for (address = 0; address <= MAX_CPU_ADDRESS;
+		for (address = 0;
+		     address < (SCLP_MAX_CORES << smp_cpu_mt_shift);
 		     address += (1U << smp_cpu_mt_shift)) {
 			if (__pcpu_sigp_relax(address, SIGP_SENSE, 0, NULL) ==
 			    SIGP_CC_NOT_OPERATIONAL)
 				continue;
-			info->cpu[info->configured].core_id =
+			info->core[info->configured].core_id =
 				address >> smp_cpu_mt_shift;
 			info->configured++;
 		}
@@ -674,7 +688,7 @@ static struct sclp_cpu_info *smp_get_cpu_info(void)
 
 static int smp_add_present_cpu(int cpu);
 
-static int __smp_rescan_cpus(struct sclp_cpu_info *info, int sysfs_add)
+static int __smp_rescan_cpus(struct sclp_core_info *info, int sysfs_add)
 {
 	struct pcpu *pcpu;
 	cpumask_t avail;
@@ -685,9 +699,9 @@ static int __smp_rescan_cpus(struct sclp_cpu_info *info, int sysfs_add)
 	cpumask_xor(&avail, cpu_possible_mask, cpu_present_mask);
 	cpu = cpumask_first(&avail);
 	for (i = 0; (i < info->combined) && (cpu < nr_cpu_ids); i++) {
-		if (info->has_cpu_type && info->cpu[i].type != boot_cpu_type)
+		if (sclp.has_core_type && info->core[i].type != boot_core_type)
 			continue;
-		address = info->cpu[i].core_id << smp_cpu_mt_shift;
+		address = info->core[i].core_id << smp_cpu_mt_shift;
 		for (j = 0; j <= smp_cpu_mtid; j++) {
 			if (pcpu_find_address(cpu_present_mask, address + j))
 				continue;
@@ -713,41 +727,37 @@ static int __smp_rescan_cpus(struct sclp_cpu_info *info, int sysfs_add)
 static void __init smp_detect_cpus(void)
 {
 	unsigned int cpu, mtid, c_cpus, s_cpus;
-	struct sclp_cpu_info *info;
+	struct sclp_core_info *info;
 	u16 address;
 
 	/* Get CPU information */
-	info = smp_get_cpu_info();
+	info = smp_get_core_info();
 	if (!info)
 		panic("smp_detect_cpus failed to allocate memory\n");
 
 	/* Find boot CPU type */
-	if (info->has_cpu_type) {
+	if (sclp.has_core_type) {
 		address = stap();
 		for (cpu = 0; cpu < info->combined; cpu++)
-			if (info->cpu[cpu].core_id == address) {
+			if (info->core[cpu].core_id == address) {
 				/* The boot cpu dictates the cpu type. */
-				boot_cpu_type = info->cpu[cpu].type;
+				boot_core_type = info->core[cpu].type;
 				break;
 			}
 		if (cpu >= info->combined)
 			panic("Could not find boot CPU type");
 	}
 
-#ifdef CONFIG_CRASH_DUMP
-	/* Collect CPU state of previous system */
-	smp_store_cpu_states(info);
-#endif
-
 	/* Set multi-threading state for the current system */
-	mtid = boot_cpu_type ? sclp.mtid : sclp.mtid_cp;
+	mtid = boot_core_type ? sclp.mtid : sclp.mtid_cp;
 	mtid = (mtid < smp_max_threads) ? mtid : smp_max_threads - 1;
 	pcpu_set_smt(mtid);
 
 	/* Print number of CPUs */
 	c_cpus = s_cpus = 0;
 	for (cpu = 0; cpu < info->combined; cpu++) {
-		if (info->has_cpu_type && info->cpu[cpu].type != boot_cpu_type)
+		if (sclp.has_core_type &&
+		    info->core[cpu].type != boot_core_type)
 			continue;
 		if (cpu < info->configured)
 			c_cpus += smp_cpu_mtid + 1;
@@ -884,7 +894,7 @@ void __init smp_fill_possible_mask(void)
 
 	sclp_max = max(sclp.mtid, sclp.mtid_cp) + 1;
 	sclp_max = min(smp_max_threads, sclp_max);
-	sclp_max = sclp.max_cpu * sclp_max ?: nr_cpu_ids;
+	sclp_max = sclp.max_cores * sclp_max ?: nr_cpu_ids;
 	possible = setup_possible_cpus ?: nr_cpu_ids;
 	possible = min(possible, sclp_max);
 	for (cpu = 0; cpu < possible && cpu < nr_cpu_ids; cpu++)
@@ -977,7 +987,7 @@ static ssize_t cpu_configure_store(struct device *dev,
 	case 0:
 		if (pcpu->state != CPU_STATE_CONFIGURED)
 			break;
-		rc = sclp_cpu_deconfigure(pcpu->address >> smp_cpu_mt_shift);
+		rc = sclp_core_deconfigure(pcpu->address >> smp_cpu_mt_shift);
 		if (rc)
 			break;
 		for (i = 0; i <= smp_cpu_mtid; i++) {
@@ -992,7 +1002,7 @@ static ssize_t cpu_configure_store(struct device *dev,
 	case 1:
 		if (pcpu->state != CPU_STATE_STANDBY)
 			break;
-		rc = sclp_cpu_configure(pcpu->address >> smp_cpu_mt_shift);
+		rc = sclp_core_configure(pcpu->address >> smp_cpu_mt_shift);
 		if (rc)
 			break;
 		for (i = 0; i <= smp_cpu_mtid; i++) {
@@ -1107,10 +1117,10 @@ static int smp_add_present_cpu(int cpu)
 
 int __ref smp_rescan_cpus(void)
 {
-	struct sclp_cpu_info *info;
+	struct sclp_core_info *info;
 	int nr;
 
-	info = smp_get_cpu_info();
+	info = smp_get_core_info();
 	if (!info)
 		return -ENOMEM;
 	get_online_cpus();

arch/s390/net/bpf_jit_comp.c

@@ -250,7 +250,7 @@ static inline void reg_set_seen(struct bpf_jit *jit, u32 b1)
 ({								\
 	/* Branch instruction needs 6 bytes */			\
 	int rel = (addrs[i + off + 1] - (addrs[i + 1] - 6)) / 2;\
-	_EMIT6(op1 | reg(b1, b2) << 16 | rel, op2 | mask);	\
+	_EMIT6(op1 | reg(b1, b2) << 16 | (rel & 0xffff), op2 | mask);	\
 	REG_SET_SEEN(b1);					\
 	REG_SET_SEEN(b2);					\
 })

drivers/s390/char/sclp_cmd.c

@@ -92,8 +92,8 @@ struct read_cpu_info_sccb {
 	u8	reserved[4096 - 16];
 } __attribute__((packed, aligned(PAGE_SIZE)));
 
-static void sclp_fill_cpu_info(struct sclp_cpu_info *info,
-			       struct read_cpu_info_sccb *sccb)
+static void sclp_fill_core_info(struct sclp_core_info *info,
+				struct read_cpu_info_sccb *sccb)
 {
 	char *page = (char *) sccb;
 
@@ -101,12 +101,11 @@ static void sclp_fill_cpu_info(struct sclp_cpu_info *info,
 	info->configured = sccb->nr_configured;
 	info->standby = sccb->nr_standby;
 	info->combined = sccb->nr_configured + sccb->nr_standby;
-	info->has_cpu_type = sclp.has_cpu_type;
-	memcpy(&info->cpu, page + sccb->offset_configured,
-	       info->combined * sizeof(struct sclp_cpu_entry));
+	memcpy(&info->core, page + sccb->offset_configured,
+	       info->combined * sizeof(struct sclp_core_entry));
 }
 
-int sclp_get_cpu_info(struct sclp_cpu_info *info)
+int sclp_get_core_info(struct sclp_core_info *info)
 {
 	int rc;
 	struct read_cpu_info_sccb *sccb;
@@ -127,7 +126,7 @@ int sclp_get_cpu_info(struct sclp_cpu_info *info)
 		rc = -EIO;
 		goto out;
 	}
-	sclp_fill_cpu_info(info, sccb);
+	sclp_fill_core_info(info, sccb);
 out:
 	free_page((unsigned long) sccb);
 	return rc;
@@ -137,7 +136,7 @@ struct cpu_configure_sccb {
 	struct sccb_header header;
 } __attribute__((packed, aligned(8)));
 
-static int do_cpu_configure(sclp_cmdw_t cmd)
+static int do_core_configure(sclp_cmdw_t cmd)
 {
 	struct cpu_configure_sccb *sccb;
 	int rc;
@@ -171,14 +170,14 @@ static int do_cpu_configure(sclp_cmdw_t cmd)
 	return rc;
 }
 
-int sclp_cpu_configure(u8 cpu)
+int sclp_core_configure(u8 core)
 {
-	return do_cpu_configure(SCLP_CMDW_CONFIGURE_CPU | cpu << 8);
+	return do_core_configure(SCLP_CMDW_CONFIGURE_CPU | core << 8);
 }
 
-int sclp_cpu_deconfigure(u8 cpu)
+int sclp_core_deconfigure(u8 core)
 {
-	return do_cpu_configure(SCLP_CMDW_DECONFIGURE_CPU | cpu << 8);
+	return do_core_configure(SCLP_CMDW_DECONFIGURE_CPU | core << 8);
 }
 
 #ifdef CONFIG_MEMORY_HOTPLUG

drivers/s390/char/sclp_early.c

@@ -98,7 +98,7 @@ static int __init sclp_read_info_early(struct read_info_sccb *sccb)
 
 static void __init sclp_facilities_detect(struct read_info_sccb *sccb)
 {
-	struct sclp_cpu_entry *cpue;
+	struct sclp_core_entry *cpue;
 	u16 boot_cpu_address, cpu;
 
 	if (sclp_read_info_early(sccb))
@@ -106,7 +106,7 @@ static void __init sclp_facilities_detect(struct read_info_sccb *sccb)
 
 	sclp.facilities = sccb->facilities;
 	sclp.has_sprp = !!(sccb->fac84 & 0x02);
-	sclp.has_cpu_type = !!(sccb->fac84 & 0x01);
+	sclp.has_core_type = !!(sccb->fac84 & 0x01);
 	if (sccb->fac85 & 0x02)
 		S390_lowcore.machine_flags |= MACHINE_FLAG_ESOP;
 	sclp.rnmax = sccb->rnmax ? sccb->rnmax : sccb->rnmax2;
@@ -116,11 +116,11 @@ static void __init sclp_facilities_detect(struct read_info_sccb *sccb)
 
 	if (!sccb->hcpua) {
 		if (MACHINE_IS_VM)
-			sclp.max_cpu = 64;
+			sclp.max_cores = 64;
 		else
-			sclp.max_cpu = sccb->ncpurl;
+			sclp.max_cores = sccb->ncpurl;
 	} else {
-		sclp.max_cpu = sccb->hcpua + 1;
+		sclp.max_cores = sccb->hcpua + 1;
 	}
 
 	boot_cpu_address = stap();

drivers/s390/char/zcore.c

@@ -154,7 +154,7 @@ static int __init init_cpu_info(enum arch_id arch)
 
 	/* get info for boot cpu from lowcore, stored in the HSA */
 
-	sa_ext = dump_save_area_create(0);
+	sa_ext = dump_save_areas.areas[0];
 	if (!sa_ext)
 		return -ENOMEM;
 	if (memcpy_hsa_kernel(&sa_ext->sa, sys_info.sa_base,

drivers/s390/crypto/ap_bus.c

@@ -60,7 +60,7 @@ static int __ap_poll_device(struct ap_device *ap_dev, unsigned long *flags);
 static int ap_device_remove(struct device *dev);
 static int ap_device_probe(struct device *dev);
 static void ap_interrupt_handler(struct airq_struct *airq);
-static void ap_reset(struct ap_device *ap_dev);
+static void ap_reset(struct ap_device *ap_dev, unsigned long *flags);
 static void ap_config_timeout(unsigned long ptr);
 static int ap_select_domain(void);
 static void ap_query_configuration(void);
@@ -310,35 +310,26 @@ static inline int __ap_query_configuration(struct ap_config_info *config)
 static int ap_query_functions(ap_qid_t qid, unsigned int *functions)
 {
 	struct ap_queue_status status;
-	int i;
+
 	status = __ap_query_functions(qid, functions);
 
-	for (i = 0; i < AP_MAX_RESET; i++) {
-		if (ap_queue_status_invalid_test(&status))
-			return -ENODEV;
+	if (ap_queue_status_invalid_test(&status))
+		return -ENODEV;
 
-		switch (status.response_code) {
-		case AP_RESPONSE_NORMAL:
-			return 0;
-		case AP_RESPONSE_RESET_IN_PROGRESS:
-		case AP_RESPONSE_BUSY:
-			break;
-		case AP_RESPONSE_Q_NOT_AVAIL:
-		case AP_RESPONSE_DECONFIGURED:
-		case AP_RESPONSE_CHECKSTOPPED:
-		case AP_RESPONSE_INVALID_ADDRESS:
-			return -ENODEV;
-		case AP_RESPONSE_OTHERWISE_CHANGED:
-			break;
-		default:
-			break;
-		}
-		if (i < AP_MAX_RESET - 1) {
-			udelay(5);
-			status = __ap_query_functions(qid, functions);
-		}
+	switch (status.response_code) {
+	case AP_RESPONSE_NORMAL:
+		return 0;
+	case AP_RESPONSE_Q_NOT_AVAIL:
+	case AP_RESPONSE_DECONFIGURED:
+	case AP_RESPONSE_CHECKSTOPPED:
+	case AP_RESPONSE_INVALID_ADDRESS:
+		return -ENODEV;
+	case AP_RESPONSE_RESET_IN_PROGRESS:
+	case AP_RESPONSE_BUSY:
+	case AP_RESPONSE_OTHERWISE_CHANGED:
+	default:
+		return -EBUSY;
 	}
-	return -EBUSY;
 }
 
 /**
@@ -350,47 +341,25 @@ static int ap_query_functions(ap_qid_t qid, unsigned int *functions)
  * on the return value it waits a while and tests the AP queue if interrupts
  * have been switched on using ap_test_queue().
  */
-static int ap_queue_enable_interruption(ap_qid_t qid, void *ind)
+static int ap_queue_enable_interruption(struct ap_device *ap_dev, void *ind)
 {
 	struct ap_queue_status status;
-	int t_depth, t_device_type, rc, i;
 
-	rc = -EBUSY;
-	status = ap_queue_interruption_control(qid, ind);
-
-	for (i = 0; i < AP_MAX_RESET; i++) {
-		switch (status.response_code) {
-		case AP_RESPONSE_NORMAL:
-			if (status.int_enabled)
-				return 0;
-			break;
-		case AP_RESPONSE_RESET_IN_PROGRESS:
-		case AP_RESPONSE_BUSY:
-			if (i < AP_MAX_RESET - 1) {
-				udelay(5);
-				status = ap_queue_interruption_control(qid,
-								       ind);
-				continue;
-			}
-			break;
-		case AP_RESPONSE_Q_NOT_AVAIL:
-		case AP_RESPONSE_DECONFIGURED:
-		case AP_RESPONSE_CHECKSTOPPED:
-		case AP_RESPONSE_INVALID_ADDRESS:
-			return -ENODEV;
-		case AP_RESPONSE_OTHERWISE_CHANGED:
-			if (status.int_enabled)
-				return 0;
-			break;
-		default:
-			break;
-		}
-		if (i < AP_MAX_RESET - 1) {
-			udelay(5);
-			status = ap_test_queue(qid, &t_depth, &t_device_type);
-		}
+	status = ap_queue_interruption_control(ap_dev->qid, ind);
+	switch (status.response_code) {
+	case AP_RESPONSE_NORMAL:
+	case AP_RESPONSE_OTHERWISE_CHANGED:
+		return 0;
+	case AP_RESPONSE_Q_NOT_AVAIL:
+	case AP_RESPONSE_DECONFIGURED:
+	case AP_RESPONSE_CHECKSTOPPED:
+	case AP_RESPONSE_INVALID_ADDRESS:
+		return -ENODEV;
+	case AP_RESPONSE_RESET_IN_PROGRESS:
+	case AP_RESPONSE_BUSY:
+	default:
+		return -EBUSY;
 	}
-	return rc;
 }
 
 /**
@@ -510,110 +479,95 @@ int ap_recv(ap_qid_t qid, unsigned long long *psmid, void *msg, size_t length)
 }
 EXPORT_SYMBOL(ap_recv);
 
+/**
+ * __ap_schedule_poll_timer(): Schedule poll timer.
+ *
+ * Set up the timer to run the poll tasklet
+ */
+static inline void __ap_schedule_poll_timer(void)
+{
+	ktime_t hr_time;
+
+	spin_lock_bh(&ap_poll_timer_lock);
+	if (!hrtimer_is_queued(&ap_poll_timer) && !ap_suspend_flag) {
+		hr_time = ktime_set(0, poll_timeout);
+		hrtimer_forward_now(&ap_poll_timer, hr_time);
+		hrtimer_restart(&ap_poll_timer);
+	}
+	spin_unlock_bh(&ap_poll_timer_lock);
+}
+
+/**
+ * ap_schedule_poll_timer(): Schedule poll timer.
+ *
+ * Set up the timer to run the poll tasklet
+ */
+static inline void ap_schedule_poll_timer(void)
+{
+	if (ap_using_interrupts())
+		return;
+	__ap_schedule_poll_timer();
+}
+
+
 /**
  * ap_query_queue(): Check if an AP queue is available.
  * @qid: The AP queue number
  * @queue_depth: Pointer to queue depth value
  * @device_type: Pointer to device type value
- *
- * The test is repeated for AP_MAX_RESET times.
  */
 static int ap_query_queue(ap_qid_t qid, int *queue_depth, int *device_type)
 {
 	struct ap_queue_status status;
-	int t_depth, t_device_type, rc, i;
+	int t_depth, t_device_type;
 
-	rc = -EBUSY;
-	for (i = 0; i < AP_MAX_RESET; i++) {
-		status = ap_test_queue(qid, &t_depth, &t_device_type);
-		switch (status.response_code) {
-		case AP_RESPONSE_NORMAL:
-			*queue_depth = t_depth + 1;
-			*device_type = t_device_type;
-			rc = 0;
-			break;
-		case AP_RESPONSE_Q_NOT_AVAIL:
-			rc = -ENODEV;
-			break;
-		case AP_RESPONSE_RESET_IN_PROGRESS:
-			break;
-		case AP_RESPONSE_DECONFIGURED:
-			rc = -ENODEV;
-			break;
-		case AP_RESPONSE_CHECKSTOPPED:
-			rc = -ENODEV;
-			break;
-		case AP_RESPONSE_INVALID_ADDRESS:
-			rc = -ENODEV;
-			break;
-		case AP_RESPONSE_OTHERWISE_CHANGED:
-			break;
-		case AP_RESPONSE_BUSY:
-			break;
-		default:
-			BUG();
-		}
-		if (rc != -EBUSY)
-			break;
-		if (i < AP_MAX_RESET - 1)
-			udelay(5);
+	status = ap_test_queue(qid, &t_depth, &t_device_type);
+	switch (status.response_code) {
+	case AP_RESPONSE_NORMAL:
+		*queue_depth = t_depth + 1;
+		*device_type = t_device_type;
+		return 0;
+	case AP_RESPONSE_Q_NOT_AVAIL:
+	case AP_RESPONSE_DECONFIGURED:
+	case AP_RESPONSE_CHECKSTOPPED:
+	case AP_RESPONSE_INVALID_ADDRESS:
+		return -ENODEV;
+	case AP_RESPONSE_RESET_IN_PROGRESS:
+	case AP_RESPONSE_OTHERWISE_CHANGED:
+	case AP_RESPONSE_BUSY:
+		return -EBUSY;
+	default:
+		BUG();
 	}
-	return rc;
 }
 
 /**
  * ap_init_queue(): Reset an AP queue.
  * @qid: The AP queue number
  *
- * Reset an AP queue and wait for it to become available again.
+ * Submit the Reset command to an AP queue.
+ * Since the reset is asynchron set the state to 'RESET_IN_PROGRESS'
+ * and check later via ap_poll_queue() if the reset is done.
  */
-static int ap_init_queue(ap_qid_t qid)
+static int ap_init_queue(struct ap_device *ap_dev)
 {
 	struct ap_queue_status status;
-	int rc, dummy, i;
 
-	rc = -ENODEV;
-	status = ap_reset_queue(qid);
-	for (i = 0; i < AP_MAX_RESET; i++) {
-		switch (status.response_code) {
-		case AP_RESPONSE_NORMAL:
-			if (status.queue_empty)
-				rc = 0;
-			break;
-		case AP_RESPONSE_Q_NOT_AVAIL:
-		case AP_RESPONSE_DECONFIGURED:
-		case AP_RESPONSE_CHECKSTOPPED:
-			i = AP_MAX_RESET;	/* return with -ENODEV */
-			break;
-		case AP_RESPONSE_RESET_IN_PROGRESS:
-			rc = -EBUSY;
-		case AP_RESPONSE_BUSY:
-		default:
-			break;
-		}
-		if (rc != -ENODEV && rc != -EBUSY)
-			break;
-		if (i < AP_MAX_RESET - 1) {
-			/* Time we are waiting until we give up (0.7sec * 90).
-			 * Since the actual request (in progress) will not
-			 * interrupted immediately for the reset command,
-			 * we have to be patient. In worst case we have to
-			 * wait 60sec + reset time (some msec).
-			 */
-			schedule_timeout(AP_RESET_TIMEOUT);
-			status = ap_test_queue(qid, &dummy, &dummy);
-		}
-	}
-	if (rc == 0 && ap_using_interrupts()) {
-		rc = ap_queue_enable_interruption(qid, ap_airq.lsi_ptr);
-		/* If interruption mode is supported by the machine,
-		* but an AP can not be enabled for interruption then
-		* the AP will be discarded.    */
-		if (rc)
-			pr_err("Registering adapter interrupts for "
-			       "AP %d failed\n", AP_QID_DEVICE(qid));
+	status = ap_reset_queue(ap_dev->qid);
+	switch (status.response_code) {
+	case AP_RESPONSE_NORMAL:
+		ap_dev->interrupt = AP_INTR_DISABLED;
+		ap_dev->reset = AP_RESET_IN_PROGRESS;
+		return 0;
+	case AP_RESPONSE_RESET_IN_PROGRESS:
+	case AP_RESPONSE_BUSY:
+		return -EBUSY;
+	case AP_RESPONSE_Q_NOT_AVAIL:
+	case AP_RESPONSE_DECONFIGURED:
+	case AP_RESPONSE_CHECKSTOPPED:
+	default:
+		return -ENODEV;
 	}
-	return rc;
 }
 
 /**
@@ -729,10 +683,63 @@ static ssize_t ap_pendingq_count_show(struct device *dev,
 
 static DEVICE_ATTR(pendingq_count, 0444, ap_pendingq_count_show, NULL);
 
+static ssize_t ap_reset_show(struct device *dev,
+				      struct device_attribute *attr, char *buf)
+{
+	struct ap_device *ap_dev = to_ap_dev(dev);
+	int rc = 0;
+
+	spin_lock_bh(&ap_dev->lock);
+	switch (ap_dev->reset) {
+	case AP_RESET_IGNORE:
+		rc = snprintf(buf, PAGE_SIZE, "No Reset Timer set.\n");
+		break;
+	case AP_RESET_ARMED:
+		rc = snprintf(buf, PAGE_SIZE, "Reset Timer armed.\n");
+		break;
+	case AP_RESET_DO:
+		rc = snprintf(buf, PAGE_SIZE, "Reset Timer expired.\n");
+		break;
+	case AP_RESET_IN_PROGRESS:
+		rc = snprintf(buf, PAGE_SIZE, "Reset in progress.\n");
+		break;
+	default:
+		break;
+	}
+	spin_unlock_bh(&ap_dev->lock);
+	return rc;
+}
+
+static DEVICE_ATTR(reset, 0444, ap_reset_show, NULL);
+
+static ssize_t ap_interrupt_show(struct device *dev,
+				      struct device_attribute *attr, char *buf)
+{
+	struct ap_device *ap_dev = to_ap_dev(dev);
+	int rc = 0;
+
+	spin_lock_bh(&ap_dev->lock);
+	switch (ap_dev->interrupt) {
+	case AP_INTR_DISABLED:
+		rc = snprintf(buf, PAGE_SIZE, "Interrupts disabled.\n");
+		break;
+	case AP_INTR_ENABLED:
+		rc = snprintf(buf, PAGE_SIZE, "Interrupts enabled.\n");
+		break;
+	case AP_INTR_IN_PROGRESS:
+		rc = snprintf(buf, PAGE_SIZE, "Enable Interrupt pending.\n");
+		break;
+	}
+	spin_unlock_bh(&ap_dev->lock);
+	return rc;
+}
+
+static DEVICE_ATTR(interrupt, 0444, ap_interrupt_show, NULL);
+
 static ssize_t ap_modalias_show(struct device *dev,
 				struct device_attribute *attr, char *buf)
 {
-	return sprintf(buf, "ap:t%02X", to_ap_dev(dev)->device_type);
+	return sprintf(buf, "ap:t%02X\n", to_ap_dev(dev)->device_type);
 }
 
 static DEVICE_ATTR(modalias, 0444, ap_modalias_show, NULL);
@@ -753,6 +760,8 @@ static struct attribute *ap_dev_attrs[] = {
 	&dev_attr_request_count.attr,
 	&dev_attr_requestq_count.attr,
 	&dev_attr_pendingq_count.attr,
+	&dev_attr_reset.attr,
+	&dev_attr_interrupt.attr,
 	&dev_attr_modalias.attr,
 	&dev_attr_ap_functions.attr,
 	NULL
@@ -926,6 +935,10 @@ static int ap_device_probe(struct device *dev)
 		spin_lock_bh(&ap_device_list_lock);
 		list_del_init(&ap_dev->list);
 		spin_unlock_bh(&ap_device_list_lock);
+	} else {
+		if (ap_dev->reset == AP_RESET_IN_PROGRESS ||
+			ap_dev->interrupt == AP_INTR_IN_PROGRESS)
+			__ap_schedule_poll_timer();
 	}
 	return rc;
 }
@@ -1411,7 +1424,7 @@ static void ap_scan_bus(struct work_struct *unused)
 	struct ap_device *ap_dev;
 	struct device *dev;
 	ap_qid_t qid;
-	int queue_depth, device_type;
+	int queue_depth = 0, device_type = 0;
 	unsigned int device_functions;
 	int rc, i;
 
@@ -1429,15 +1442,9 @@ static void ap_scan_bus(struct work_struct *unused)
 		else
 			rc = -ENODEV;
 		if (dev) {
-			if (rc == -EBUSY) {
-				set_current_state(TASK_UNINTERRUPTIBLE);
-				schedule_timeout(AP_RESET_TIMEOUT);
-				rc = ap_query_queue(qid, &queue_depth,
-						    &device_type);
-			}
 			ap_dev = to_ap_dev(dev);
 			spin_lock_bh(&ap_dev->lock);
-			if (rc || ap_dev->unregistered) {
+			if (rc == -ENODEV || ap_dev->unregistered) {
 				spin_unlock_bh(&ap_dev->lock);
 				if (ap_dev->unregistered)
 					i--;
@@ -1449,15 +1456,17 @@ static void ap_scan_bus(struct work_struct *unused)
 			put_device(dev);
 			continue;
 		}
-		if (rc)
-			continue;
-		rc = ap_init_queue(qid);
 		if (rc)
 			continue;
 		ap_dev = kzalloc(sizeof(*ap_dev), GFP_KERNEL);
 		if (!ap_dev)
 			break;
 		ap_dev->qid = qid;
+		rc = ap_init_queue(ap_dev);
+		if ((rc != 0) && (rc != -EBUSY)) {
+			kfree(ap_dev);
+			continue;
+		}
 		ap_dev->queue_depth = queue_depth;
 		ap_dev->unregistered = 1;
 		spin_lock_init(&ap_dev->lock);
@@ -1519,36 +1528,6 @@ ap_config_timeout(unsigned long ptr)
 	add_timer(&ap_config_timer);
 }
 
-/**
- * __ap_schedule_poll_timer(): Schedule poll timer.
- *
- * Set up the timer to run the poll tasklet
- */
-static inline void __ap_schedule_poll_timer(void)
-{
-	ktime_t hr_time;
-
-	spin_lock_bh(&ap_poll_timer_lock);
-	if (!hrtimer_is_queued(&ap_poll_timer) && !ap_suspend_flag) {
-		hr_time = ktime_set(0, poll_timeout);
-		hrtimer_forward_now(&ap_poll_timer, hr_time);
-		hrtimer_restart(&ap_poll_timer);
-	}
-	spin_unlock_bh(&ap_poll_timer_lock);
-}
-
-/**
- * ap_schedule_poll_timer(): Schedule poll timer.
- *
- * Set up the timer to run the poll tasklet
- */
-static inline void ap_schedule_poll_timer(void)
-{
-	if (ap_using_interrupts())
-		return;
-	__ap_schedule_poll_timer();
-}
-
 /**
  * ap_poll_read(): Receive pending reply messages from an AP device.
  * @ap_dev: pointer to the AP device
@@ -1568,6 +1547,7 @@ static int ap_poll_read(struct ap_device *ap_dev, unsigned long *flags)
 			   ap_dev->reply->message, ap_dev->reply->length);
 	switch (status.response_code) {
 	case AP_RESPONSE_NORMAL:
+		ap_dev->interrupt = status.int_enabled;
 		atomic_dec(&ap_poll_requests);
 		ap_decrease_queue_count(ap_dev);
 		list_for_each_entry(ap_msg, &ap_dev->pendingq, list) {
@@ -1582,6 +1562,7 @@ static int ap_poll_read(struct ap_device *ap_dev, unsigned long *flags)
 			*flags |= 1;
 		break;
 	case AP_RESPONSE_NO_PENDING_REPLY:
+		ap_dev->interrupt = status.int_enabled;
 		if (status.queue_empty) {
 			/* The card shouldn't forget requests but who knows. */
 			atomic_sub(ap_dev->queue_count, &ap_poll_requests);
@@ -1612,7 +1593,8 @@ static int ap_poll_write(struct ap_device *ap_dev, unsigned long *flags)
 	struct ap_message *ap_msg;
 
 	if (ap_dev->requestq_count <= 0 ||
-	    ap_dev->queue_count >= ap_dev->queue_depth)
+	    (ap_dev->queue_count >= ap_dev->queue_depth) ||
+	    (ap_dev->reset == AP_RESET_IN_PROGRESS))
 		return 0;
 	/* Start the next request on the queue. */
 	ap_msg = list_entry(ap_dev->requestq.next, struct ap_message, list);
@@ -1646,6 +1628,8 @@ static int ap_poll_write(struct ap_device *ap_dev, unsigned long *flags)
 
 /**
  * ap_poll_queue(): Poll AP device for pending replies and send new messages.
+ * Check if the queue has a pending reset. In case it's done re-enable
+ * interrupts, otherwise reschedule the poll_timer for another attempt.
  * @ap_dev: pointer to the bus device
  * @flags: pointer to control flags, bit 2^0 is set if another poll is
  *	   required, bit 2^1 is set if the poll timer needs to get armed
@@ -1656,7 +1640,51 @@ static int ap_poll_write(struct ap_device *ap_dev, unsigned long *flags)
  */
 static inline int ap_poll_queue(struct ap_device *ap_dev, unsigned long *flags)
 {
-	int rc;
+	int rc, depth, type;
+	struct ap_queue_status status;
+
+
+	if (ap_dev->reset == AP_RESET_IN_PROGRESS) {
+		status = ap_test_queue(ap_dev->qid, &depth, &type);
+		switch (status.response_code) {
+		case AP_RESPONSE_NORMAL:
+			ap_dev->reset = AP_RESET_IGNORE;
+			if (ap_using_interrupts()) {
+				rc = ap_queue_enable_interruption(
+					ap_dev, ap_airq.lsi_ptr);
+				if (!rc)
+					ap_dev->interrupt = AP_INTR_IN_PROGRESS;
+				else if (rc == -ENODEV) {
+					pr_err("Registering adapter interrupts for "
+					"AP %d failed\n", AP_QID_DEVICE(ap_dev->qid));
+					return rc;
+				}
+			}
+			/* fall through */
+		case AP_RESPONSE_BUSY:
+		case AP_RESPONSE_RESET_IN_PROGRESS:
+			*flags |= AP_POLL_AFTER_TIMEOUT;
+			break;
+		case AP_RESPONSE_Q_NOT_AVAIL:
+		case AP_RESPONSE_DECONFIGURED:
+		case AP_RESPONSE_CHECKSTOPPED:
+			return -ENODEV;
+		default:
+			break;
+		}
+	}
+
+	if ((ap_dev->reset != AP_RESET_IN_PROGRESS) &&
+		(ap_dev->interrupt == AP_INTR_IN_PROGRESS)) {
+		status = ap_test_queue(ap_dev->qid, &depth, &type);
+		if (ap_using_interrupts()) {
+			if (status.int_enabled == 1)
+				ap_dev->interrupt = AP_INTR_ENABLED;
+			else
+				*flags |= AP_POLL_AFTER_TIMEOUT;
+		} else
+			ap_dev->interrupt = AP_INTR_DISABLED;
+	}
 
 	rc = ap_poll_read(ap_dev, flags);
 	if (rc)
@@ -1676,7 +1704,8 @@ static int __ap_queue_message(struct ap_device *ap_dev, struct ap_message *ap_ms
 	struct ap_queue_status status;
 
 	if (list_empty(&ap_dev->requestq) &&
-	    ap_dev->queue_count < ap_dev->queue_depth) {
+	    (ap_dev->queue_count < ap_dev->queue_depth) &&
+	    (ap_dev->reset != AP_RESET_IN_PROGRESS)) {
 		status = __ap_send(ap_dev->qid, ap_msg->psmid,
 				   ap_msg->message, ap_msg->length,
 				   ap_msg->special);
@@ -1789,21 +1818,20 @@ static enum hrtimer_restart ap_poll_timeout(struct hrtimer *unused)
  * Reset a not responding AP device and move all requests from the
  * pending queue to the request queue.
  */
-static void ap_reset(struct ap_device *ap_dev)
+static void ap_reset(struct ap_device *ap_dev, unsigned long *flags)
 {
 	int rc;
 
-	ap_dev->reset = AP_RESET_IGNORE;
 	atomic_sub(ap_dev->queue_count, &ap_poll_requests);
 	ap_dev->queue_count = 0;
 	list_splice_init(&ap_dev->pendingq, &ap_dev->requestq);
 	ap_dev->requestq_count += ap_dev->pendingq_count;
 	ap_dev->pendingq_count = 0;
-	rc = ap_init_queue(ap_dev->qid);
+	rc = ap_init_queue(ap_dev);
 	if (rc == -ENODEV)
 		ap_dev->unregistered = 1;
 	else
-		__ap_schedule_poll_timer();
+		*flags |= AP_POLL_AFTER_TIMEOUT;
 }
 
 static int __ap_poll_device(struct ap_device *ap_dev, unsigned long *flags)
@@ -1812,7 +1840,7 @@ static int __ap_poll_device(struct ap_device *ap_dev, unsigned long *flags)
 		if (ap_poll_queue(ap_dev, flags))
 			ap_dev->unregistered = 1;
 		if (ap_dev->reset == AP_RESET_DO)
-			ap_reset(ap_dev);
+			ap_reset(ap_dev, flags);
 	}
 	return 0;
 }
@@ -1845,9 +1873,9 @@ static void ap_poll_all(unsigned long dummy)
 			spin_unlock(&ap_dev->lock);
 		}
 		spin_unlock(&ap_device_list_lock);
-	} while (flags & 1);
-	if (flags & 2)
-		ap_schedule_poll_timer();
+	} while (flags & AP_POLL_IMMEDIATELY);
+	if (flags & AP_POLL_AFTER_TIMEOUT)
+		__ap_schedule_poll_timer();
 }
 
 /**

drivers/s390/crypto/ap_bus.h

@@ -32,11 +32,13 @@
 
 #define AP_DEVICES 64		/* Number of AP devices. */
 #define AP_DOMAINS 256		/* Number of AP domains. */
-#define AP_MAX_RESET 90		/* Maximum number of resets. */
 #define AP_RESET_TIMEOUT (HZ*0.7)	/* Time in ticks for reset timeouts. */
 #define AP_CONFIG_TIME 30	/* Time in seconds between AP bus rescans. */
 #define AP_POLL_TIME 1		/* Time in ticks between receive polls. */
 
+#define AP_POLL_IMMEDIATELY	1 /* continue running poll tasklet */
+#define AP_POLL_AFTER_TIMEOUT	2 /* run poll tasklet again after timout */
+
 extern int ap_domain_index;
 
 /**
@@ -135,6 +137,14 @@ static inline int ap_test_bit(unsigned int *ptr, unsigned int nr)
 #define AP_RESET_IGNORE	0	/* request timeout will be ignored */
 #define AP_RESET_ARMED	1	/* request timeout timer is active */
 #define AP_RESET_DO	2	/* AP reset required */
+#define AP_RESET_IN_PROGRESS	3	/* AP reset in progress */
+
+/*
+ * AP interrupt states
+ */
+#define AP_INTR_DISABLED	0	/* AP interrupt disabled */
+#define AP_INTR_ENABLED		1	/* AP interrupt enabled */
+#define AP_INTR_IN_PROGRESS	3	/* AP interrupt in progress */
 
 struct ap_device;
 struct ap_message;
@@ -168,6 +178,7 @@ struct ap_device {
 	struct timer_list timeout;	/* Timer for request timeouts. */
 	int reset;			/* Reset required after req. timeout. */
 
+	int interrupt;			/* indicate if interrupts are enabled */
 	int queue_count;		/* # messages currently on AP queue. */
 
 	struct list_head pendingq;	/* List of message sent to AP queue. */

drivers/s390/crypto/zcrypt_cex4.c

@@ -39,7 +39,7 @@
  * But the maximum time limit managed by the stomper code is set to 60sec.
  * Hence we have to wait at least that time period.
  */
-#define CEX4_CLEANUP_TIME	(61*HZ)
+#define CEX4_CLEANUP_TIME	(900*HZ)
 
 static struct ap_device_id zcrypt_cex4_ids[] = {
 	{ AP_DEVICE(AP_DEVICE_TYPE_CEX4)  },