Merge tag 's390-6.2-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux

Pull s390 updates from Alexander Gordeev:

 - Factor out handle_write() function and simplify 3215 console write
   operation

 - When 3170 terminal emulator is connected to the 3215 console driver
   the boot time could be very long due to limited buffer space or
   missing operator input. Add con3215_drop command line parameter and
   con3215_drop sysfs attribute file to instruct the kernel drop console
   data when such conditions are met

 - Fix white space errors in 3215 console driver

 - Move enum paiext_mode definition to a header file and rename it to
   paievt_mode to indicate this is now used for several events. Rename
   PAI_MODE_COUNTER to PAI_MODE_COUNTING to make consistent with
   PAI_MODE_SAMPLING

 - Simplify the logic of PMU pai_crypto mapped buffer reference counter
   and make it consistent with PMU pai_ext

 - Rename PMU pai_crypto mapped buffer structure member users to
   active_events to make it consistent with PMU pai_ext

 - Enable HUGETLB_PAGE_OPTIMIZE_VMEMMAP configuration option. This
   results in saving of 12K per 1M hugetlb page (~1.2%) and 32764K per
   2G hugetlb page (~1.6%)

 - Use generic serial.h, bugs.h, shmparam.h and vga.h header files and
   scrap s390-specific versions

 - The generic percpu setup code does not expect the s390-like
   implementation and emits a warning. To get rid of that warning and
   provide sane CPU-to-node and CPU-to-CPU distance mappings implementat
   a minimal version of setup_per_cpu_areas()

 - Use kstrtobool() instead of strtobool() for re-IPL sysfs device
   attributes

 - Avoid unnecessary lookup of a pointer to MSI descriptor when setting
   IRQ affinity for a PCI device

 - Get rid of "an incompatible function type cast" warning by changing
   debug_sprintf_format_fn() function prototype so it matches the
   debug_format_proc_t function type

 - Remove unused info_blk_hdr__pcpus() and get_page_state() functions

 - Get rid of clang "unused unused insn cache ops function" warning by
   moving s390_insn definition to a private header

 - Get rid of clang "unused function" warning by making function
   raw3270_state_final() only available if CONFIG_TN3270_CONSOLE is
   enabled

 - Use kstrobool() to parse sclp_con_drop parameter to make it identical
   to the con3215_drop parameter and allow passing values like "yes" and
   "true"

 - Use sysfs_emit() for all SCLP sysfs show functions, which is the
   current standard way to generate output strings

 - Make SCLP con_drop sysfs attribute also writable and allow to change
   its value during runtime. This makes SCLP console drop handling
   consistent with the 3215 device driver

 - Virtual and physical addresses are indentical on s390. However, there
   is still a confusion when pointers are directly casted to physical
   addresses or vice versa. Use correct address converters
   virt_to_phys() and phys_to_virt() for s390 channel IO drivers

 - Support for power managemant has been removed from s390 since quite
   some time. Remove unused power managemant code from the appldata
   device driver

 - Allow memory tools like KASAN see memory accesses from the checksum
   code. Switch to GENERIC_CSUM if KASAN is enabled, just like x86 does

 - Add support of ECKD DASDs disks so it could be used as boot and dump
   devices

 - Follow checkpatch recommendations and use octal values instead of
   S_IRUGO and S_IWUSR for dump device attributes in sysfs

 - Changes to vx-insn.h do not cause a recompile of C files that use
   asm(".include \"asm/vx-insn.h\"\n") magic to access vector
   instruction macros from inline assemblies. Add wrapper include header
   file to avoid this problem

 - Use vector instruction macros instead of byte patterns to increase
   register validation routine readability

 - The current machine check register validation handling does not take
   into account various scenarios and might lead to killing a wrong user
   process or potentially ignore corrupted FPU registers. Simplify logic
   of the machine check handler and stop the whole machine if the
   previous context was kerenel mode. If the previous context was user
   mode, kill the current task

 - Introduce sclp_emergency_printk() function which can be used to emit
   a message in emergency cases. It is supposed to be used in cases
   where regular console device drivers may not work anymore, e.g.
   unrecoverable machine checks

   Keep the early Service-Call Control Block so it can also be used
   after initdata has been freed to allow sclp_emergency_printk()
   implementation

 - In case a system will be stopped because of an unrecoverable machine
   check error print the machine check interruption code to give a hint
   of what went wrong

 - Move storage error checking from the assembly entry code to C in
   order to simplify machine check handling. Enter the handler with DAT
   turned on, which simplifies the entry code even more

 - The machine check extended save areas are allocated using a private
   "nmi_save_areas" slab cache which guarantees a required power-of-two
   alignment. Get rid of that cache in favour of kmalloc()

* tag 's390-6.2-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (38 commits)
  s390/nmi: get rid of private slab cache
  s390/nmi: move storage error checking back to C, enter with DAT on
  s390/nmi: print machine check interruption code before stopping system
  s390/sclp: introduce sclp_emergency_printk()
  s390/sclp: keep sclp_early_sccb
  s390/nmi: rework register validation handling
  s390/nmi: use vector instruction macros instead of byte patterns
  s390/vx: add vx-insn.h wrapper include file
  s390/ipl: use octal values instead of S_* macros
  s390/ipl: add eckd dump support
  s390/ipl: add eckd support
  vfio/ccw: identify CCW data addresses as physical
  vfio/ccw: sort out physical vs virtual pointers usage
  s390/checksum: support GENERIC_CSUM, enable it for KASAN
  s390/appldata: remove power management callbacks
  s390/cio: sort out physical vs virtual pointers usage
  s390/sclp: allow to change sclp_console_drop during runtime
  s390/sclp: convert to use sysfs_emit()
  s390/sclp: use kstrobool() to parse sclp_con_drop parameter
  s390/3270: make raw3270_state_final() depend on CONFIG_TN3270_CONSOLE
  ...

Author: torvalds

Documentation/admin-guide/kernel-parameters.txt

@@ -703,6 +703,17 @@
 	condev=		[HW,S390] console device
 	conmode=
 
+	con3215_drop=	[S390] 3215 console drop mode.
+			Format: y|n|Y|N|1|0
+			When set to true, drop data on the 3215 console when
+			the console buffer is full. In this case the
+			operator using a 3270 terminal emulator (for example
+			x3270) does not have to enter the clear key for the
+			console output to advance and the kernel to continue.
+			This leads to a much faster boot time when a 3270
+			terminal emulator is active. If no 3270 terminal
+			emulator is used, this parameter has no effect.
+
 	console=	[KNL] Output console device and options.
 
 		tty<n>	Use the virtual console device <n>.

arch/s390/Kconfig

@@ -26,6 +26,10 @@ config GENERIC_BUG
 config GENERIC_BUG_RELATIVE_POINTERS
 	def_bool y
 
+config GENERIC_CSUM
+	bool
+	default y if KASAN
+
 config GENERIC_LOCKBREAK
 	def_bool y if PREEMPTION
 
@@ -122,6 +126,7 @@ config S390
 	select ARCH_WANTS_NO_INSTR
 	select ARCH_WANT_DEFAULT_BPF_JIT
 	select ARCH_WANT_IPC_PARSE_VERSION
+	select ARCH_WANT_HUGETLB_PAGE_OPTIMIZE_VMEMMAP
 	select BUILDTIME_TABLE_SORT
 	select CLONE_BACKWARDS2
 	select DMA_OPS if PCI
@@ -197,6 +202,7 @@ config S390
 	select HAVE_RSEQ
 	select HAVE_SAMPLE_FTRACE_DIRECT
 	select HAVE_SAMPLE_FTRACE_DIRECT_MULTI
+	select HAVE_SETUP_PER_CPU_AREA
 	select HAVE_SOFTIRQ_ON_OWN_STACK
 	select HAVE_SYSCALL_TRACEPOINTS
 	select HAVE_VIRT_CPU_ACCOUNTING
@@ -208,6 +214,7 @@ config S390
 	select MMU_GATHER_MERGE_VMAS
 	select MODULES_USE_ELF_RELA
 	select NEED_DMA_MAP_STATE	if PCI
+	select NEED_PER_CPU_EMBED_FIRST_CHUNK
 	select NEED_SG_DMA_LENGTH	if PCI
 	select OLD_SIGACTION
 	select OLD_SIGSUSPEND3

arch/s390/appldata/appldata_base.c

@@ -26,8 +26,6 @@
 #include <linux/notifier.h>
 #include <linux/cpu.h>
 #include <linux/workqueue.h>
-#include <linux/suspend.h>
-#include <linux/platform_device.h>
 #include <asm/appldata.h>
 #include <asm/vtimer.h>
 #include <linux/uaccess.h>
@@ -44,8 +42,6 @@
 #define TOD_MICRO	0x01000			/* nr. of TOD clock units
 						   for 1 microsecond */
 
-static struct platform_device *appldata_pdev;
-
 /*
  * /proc entries (sysctl)
  */
@@ -88,7 +84,6 @@ static struct vtimer_list appldata_timer;
 static DEFINE_SPINLOCK(appldata_timer_lock);
 static int appldata_interval = APPLDATA_CPU_INTERVAL;
 static int appldata_timer_active;
-static int appldata_timer_suspended = 0;
 
 /*
  * Work queue
@@ -412,88 +407,6 @@ void appldata_unregister_ops(struct appldata_ops *ops)
 /********************** module-ops management <END> **************************/
 
 
-/**************************** suspend / resume *******************************/
-static int appldata_freeze(struct device *dev)
-{
-	struct appldata_ops *ops;
-	int rc;
-	struct list_head *lh;
-
-	spin_lock(&appldata_timer_lock);
-	if (appldata_timer_active) {
-		__appldata_vtimer_setup(APPLDATA_DEL_TIMER);
-		appldata_timer_suspended = 1;
-	}
-	spin_unlock(&appldata_timer_lock);
-
-	mutex_lock(&appldata_ops_mutex);
-	list_for_each(lh, &appldata_ops_list) {
-		ops = list_entry(lh, struct appldata_ops, list);
-		if (ops->active == 1) {
-			rc = appldata_diag(ops->record_nr, APPLDATA_STOP_REC,
-					(unsigned long) ops->data, ops->size,
-					ops->mod_lvl);
-			if (rc != 0)
-				pr_err("Stopping the data collection for %s "
-				       "failed with rc=%d\n", ops->name, rc);
-		}
-	}
-	mutex_unlock(&appldata_ops_mutex);
-	return 0;
-}
-
-static int appldata_restore(struct device *dev)
-{
-	struct appldata_ops *ops;
-	int rc;
-	struct list_head *lh;
-
-	spin_lock(&appldata_timer_lock);
-	if (appldata_timer_suspended) {
-		__appldata_vtimer_setup(APPLDATA_ADD_TIMER);
-		appldata_timer_suspended = 0;
-	}
-	spin_unlock(&appldata_timer_lock);
-
-	mutex_lock(&appldata_ops_mutex);
-	list_for_each(lh, &appldata_ops_list) {
-		ops = list_entry(lh, struct appldata_ops, list);
-		if (ops->active == 1) {
-			ops->callback(ops->data);	// init record
-			rc = appldata_diag(ops->record_nr,
-					APPLDATA_START_INTERVAL_REC,
-					(unsigned long) ops->data, ops->size,
-					ops->mod_lvl);
-			if (rc != 0) {
-				pr_err("Starting the data collection for %s "
-				       "failed with rc=%d\n", ops->name, rc);
-			}
-		}
-	}
-	mutex_unlock(&appldata_ops_mutex);
-	return 0;
-}
-
-static int appldata_thaw(struct device *dev)
-{
-	return appldata_restore(dev);
-}
-
-static const struct dev_pm_ops appldata_pm_ops = {
-	.freeze		= appldata_freeze,
-	.thaw		= appldata_thaw,
-	.restore	= appldata_restore,
-};
-
-static struct platform_driver appldata_pdrv = {
-	.driver = {
-		.name	= "appldata",
-		.pm	= &appldata_pm_ops,
-	},
-};
-/************************* suspend / resume <END> ****************************/
-
-
 /******************************* init / exit *********************************/
 
 /*
@@ -503,36 +416,14 @@ static struct platform_driver appldata_pdrv = {
  */
 static int __init appldata_init(void)
 {
-	int rc;
-
 	init_virt_timer(&appldata_timer);
 	appldata_timer.function = appldata_timer_function;
 	appldata_timer.data = (unsigned long) &appldata_work;
-
-	rc = platform_driver_register(&appldata_pdrv);
-	if (rc)
-		return rc;
-
-	appldata_pdev = platform_device_register_simple("appldata", -1, NULL,
-							0);
-	if (IS_ERR(appldata_pdev)) {
-		rc = PTR_ERR(appldata_pdev);
-		goto out_driver;
-	}
 	appldata_wq = alloc_ordered_workqueue("appldata", 0);
-	if (!appldata_wq) {
-		rc = -ENOMEM;
-		goto out_device;
-	}
-
+	if (!appldata_wq)
+		return -ENOMEM;
 	appldata_sysctl_header = register_sysctl_table(appldata_dir_table);
 	return 0;
-
-out_device:
-	platform_device_unregister(appldata_pdev);
-out_driver:
-	platform_driver_unregister(&appldata_pdrv);
-	return rc;
 }
 
 __initcall(appldata_init);

arch/s390/boot/ipl_parm.c

@@ -77,6 +77,9 @@ bool is_ipl_block_dump(void)
 	if (ipl_block.pb0_hdr.pbt == IPL_PBT_NVME &&
 	    ipl_block.nvme.opt == IPL_PB0_NVME_OPT_DUMP)
 		return true;
+	if (ipl_block.pb0_hdr.pbt == IPL_PBT_ECKD &&
+	    ipl_block.eckd.opt == IPL_PB0_ECKD_OPT_DUMP)
+		return true;
 	return false;
 }
 
@@ -108,6 +111,11 @@ static size_t ipl_block_get_ascii_scpdata(char *dest, size_t size,
 		scp_data_len = ipb->nvme.scp_data_len;
 		scp_data = ipb->nvme.scp_data;
 		break;
+	case IPL_PBT_ECKD:
+		scp_data_len = ipb->eckd.scp_data_len;
+		scp_data = ipb->eckd.scp_data;
+		break;
+
 	default:
 		goto out;
 	}
@@ -153,6 +161,7 @@ static void append_ipl_block_parm(void)
 		break;
 	case IPL_PBT_FCP:
 	case IPL_PBT_NVME:
+	case IPL_PBT_ECKD:
 		rc = ipl_block_get_ascii_scpdata(
 			parm, COMMAND_LINE_SIZE - len - 1, &ipl_block);
 		break;

arch/s390/hypfs/hypfs_diag.c

@@ -68,14 +68,6 @@ static inline __u8 info_blk_hdr__flags(enum diag204_format type, void *hdr)
 		return ((struct diag204_x_info_blk_hdr *)hdr)->flags;
 }
 
-static inline __u16 info_blk_hdr__pcpus(enum diag204_format type, void *hdr)
-{
-	if (type == DIAG204_INFO_SIMPLE)
-		return ((struct diag204_info_blk_hdr *)hdr)->phys_cpus;
-	else /* DIAG204_INFO_EXT */
-		return ((struct diag204_x_info_blk_hdr *)hdr)->phys_cpus;
-}
-
 /* Partition header */
 
 static inline int part_hdr__size(enum diag204_format type)

arch/s390/include/asm/bugs.h

@@ -12,6 +12,12 @@
 #ifndef _S390_CHECKSUM_H
 #define _S390_CHECKSUM_H
 
+#ifdef CONFIG_GENERIC_CSUM
+
+#include <asm-generic/checksum.h>
+
+#else /* CONFIG_GENERIC_CSUM */
+
 #include <linux/uaccess.h>
 #include <linux/in6.h>
 
@@ -129,4 +135,5 @@ static inline __sum16 csum_ipv6_magic(const struct in6_addr *saddr,
 	return csum_fold((__force __wsum)(sum >> 32));
 }
 
+#endif /* CONFIG_GENERIC_CSUM */
 #endif /* _S390_CHECKSUM_H */

arch/s390/include/asm/checksum.h

@@ -22,6 +22,7 @@ struct ipl_parameter_block {
 		struct ipl_pb0_common common;
 		struct ipl_pb0_fcp fcp;
 		struct ipl_pb0_ccw ccw;
+		struct ipl_pb0_eckd eckd;
 		struct ipl_pb0_nvme nvme;
 		char raw[PAGE_SIZE - sizeof(struct ipl_pl_hdr)];
 	};
@@ -41,6 +42,10 @@ struct ipl_parameter_block {
 			      sizeof(struct ipl_pb0_ccw))
 #define IPL_BP0_CCW_LEN (sizeof(struct ipl_pb0_ccw))
 
+#define IPL_BP_ECKD_LEN (sizeof(struct ipl_pl_hdr) + \
+			      sizeof(struct ipl_pb0_eckd))
+#define IPL_BP0_ECKD_LEN (sizeof(struct ipl_pb0_eckd))
+
 #define IPL_MAX_SUPPORTED_VERSION (0)
 
 #define IPL_RB_CERT_UNKNOWN ((unsigned short)-1)
@@ -68,6 +73,8 @@ enum ipl_type {
 	IPL_TYPE_NSS		= 16,
 	IPL_TYPE_NVME		= 32,
 	IPL_TYPE_NVME_DUMP	= 64,
+	IPL_TYPE_ECKD		= 128,
+	IPL_TYPE_ECKD_DUMP	= 256,
 };
 
 struct ipl_info
@@ -77,6 +84,9 @@ struct ipl_info
 		struct {
 			struct ccw_dev_id dev_id;
 		} ccw;
+		struct {
+			struct ccw_dev_id dev_id;
+		} eckd;
 		struct {
 			struct ccw_dev_id dev_id;
 			u64 wwpn;
@@ -99,6 +109,7 @@ extern void set_os_info_reipl_block(void);
 static inline bool is_ipl_type_dump(void)
 {
 	return (ipl_info.type == IPL_TYPE_FCP_DUMP) ||
+		(ipl_info.type == IPL_TYPE_ECKD_DUMP) ||
 		(ipl_info.type == IPL_TYPE_NVME_DUMP);
 }
 

arch/s390/include/asm/ipl.h

@@ -75,4 +75,10 @@ static __always_inline void pai_kernel_exit(struct pt_regs *regs)
 	WRITE_ONCE(S390_lowcore.ccd, S390_lowcore.ccd & ~PAI_CRYPTO_KERNEL_OFFSET);
 }
 
+enum paievt_mode {
+	PAI_MODE_NONE,
+	PAI_MODE_SAMPLING,
+	PAI_MODE_COUNTING,
+};
+
 #endif

arch/s390/include/asm/pai.h

@@ -87,6 +87,7 @@ struct sclp_info {
 	unsigned char has_gisaf : 1;
 	unsigned char has_diag318 : 1;
 	unsigned char has_sipl : 1;
+	unsigned char has_sipl_eckd : 1;
 	unsigned char has_dirq : 1;
 	unsigned char has_iplcc : 1;
 	unsigned char has_zpci_lsi : 1;
@@ -131,6 +132,7 @@ void sclp_early_get_ipl_info(struct sclp_ipl_info *info);
 void sclp_early_detect(void);
 void sclp_early_printk(const char *s);
 void __sclp_early_printk(const char *s, unsigned int len);
+void sclp_emergency_printk(const char *s);
 
 int sclp_early_get_memsize(unsigned long *mem);
 int sclp_early_get_hsa_size(unsigned long *hsa_size);