Merge tag 's390-5.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux

Pull more s390 updates from Vasily Gorbik:

 - Fix integer overflow during stack frame unwind with invalid
   backchain.

 - Cleanup unused symbol export in zcrypt code.

 - Fix MIO addressing control activation in PCI code and expose its
   usage via sysfs.

 - Fix kernel image signature verification report presence detection.

 - Fix irq registration in vfio-ap code.

 - Add CPU measurement counters for newer machines.

 - Add base DASD thin provisioning support and code cleanups.

* tag 's390-5.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (21 commits)
  s390/unwind: avoid int overflow in outside_of_stack
  s390/zcrypt: remove the exporting of ap_query_configuration
  s390/pci: add mio_enabled attribute
  s390: fix setting of mio addressing control
  s390/ipl: Fix detection of has_secure attribute
  s390: vfio-ap: fix irq registration
  s390/cpumf: Add extended counter set definitions for model 8561 and 8562
  s390/dasd: Handle out-of-space constraint
  s390/dasd: Add discard support for ESE volumes
  s390/dasd: Use ALIGN_DOWN macro
  s390/dasd: Make dasd_setup_queue() a discipline function
  s390/dasd: Add new ioctl to release space
  s390/dasd: Add dasd_sleep_on_queue_interruptible()
  s390/dasd: Add missing intensity definition
  s390/dasd: Fix whitespace
  s390/dasd: Add dynamic formatting support for ESE volumes
  s390/dasd: Recognise data for ESE volumes
  s390/dasd: Put sub-order definitions in a separate section
  s390/dasd: Make layout analysis ESE compatible
  s390/dasd: Remove old defines and function
  ...

arch/s390/include/asm/pci_insn.h

@@ -143,14 +143,4 @@ static inline int zpci_set_irq_ctrl(u16 ctl, u8 isc)
 	return __zpci_set_irq_ctrl(ctl, isc, &iib);
 }
 
-#ifdef CONFIG_PCI
-static inline void enable_mio_ctl(void)
-{
-	if (static_branch_likely(&have_mio))
-		__ctl_set_bit(2, 5);
-}
-#else /* CONFIG_PCI */
-static inline void enable_mio_ctl(void) {}
-#endif /* CONFIG_PCI */
-
 #endif

arch/s390/include/asm/sclp.h

@@ -80,7 +80,6 @@ struct sclp_info {
 	unsigned char has_gisaf : 1;
 	unsigned char has_diag318 : 1;
 	unsigned char has_sipl : 1;
-	unsigned char has_sipl_g2 : 1;
 	unsigned char has_dirq : 1;
 	unsigned int ibc;
 	unsigned int mtid;

arch/s390/include/uapi/asm/dasd.h

@@ -193,6 +193,8 @@ typedef struct format_data_t {
 #define DASD_FMT_INT_FMT_HA	2	/* write home address, also set FMT_R0 ! */
 #define DASD_FMT_INT_INVAL	4	/* invalidate tracks */
 #define DASD_FMT_INT_COMPAT	8	/* use OS/390 compatible disk layout */
+#define DASD_FMT_INT_FMT_NOR0	16	/* remove permission to write record zero */
+#define DASD_FMT_INT_ESE_FULL	32	/* release space for entire volume */
 
 /*
  * struct format_check_t
@@ -322,6 +324,8 @@ struct dasd_snid_ioctl_data {
 #define BIODASDFMT     _IOW(DASD_IOCTL_LETTER,1,format_data_t)
 /* Set Attributes (cache operations) */
 #define BIODASDSATTR   _IOW(DASD_IOCTL_LETTER,2,attrib_data_t)
+/* Release Allocated Space */
+#define BIODASDRAS     _IOW(DASD_IOCTL_LETTER, 3, format_data_t)
 
 /* Get Sense Path Group ID (SNID) data */
 #define BIODASDSNID    _IOWR(DASD_IOCTL_LETTER, 1, struct dasd_snid_ioctl_data)

arch/s390/kernel/early.c

@@ -30,7 +30,6 @@
 #include <asm/sclp.h>
 #include <asm/facility.h>
 #include <asm/boot_data.h>
-#include <asm/pci_insn.h>
 #include "entry.h"
 
 /*
@@ -236,7 +235,6 @@ static __init void detect_machine_facilities(void)
 		clock_comparator_max = -1ULL >> 1;
 		__ctl_set_bit(0, 53);
 	}
-	enable_mio_ctl();
 }
 
 static inline void save_vector_registers(void)

arch/s390/kernel/ipl.c

@@ -286,12 +286,7 @@ static struct kobj_attribute sys_ipl_secure_attr =
 static ssize_t ipl_has_secure_show(struct kobject *kobj,
 				   struct kobj_attribute *attr, char *page)
 {
-	if (MACHINE_IS_LPAR)
 	return sprintf(page, "%i\n", !!sclp.has_sipl);
-	else if (MACHINE_IS_VM)
-		return sprintf(page, "%i\n", !!sclp.has_sipl_g2);
-	else
-		return sprintf(page, "%i\n", 0);
 }
 
 static struct kobj_attribute sys_ipl_has_secure_attr =

arch/s390/kernel/perf_cpum_cf_events.c

@@ -624,6 +624,8 @@ __init const struct attribute_group **cpumf_cf_event_group(void)
 		break;
 	case 0x3906:
 	case 0x3907:
+	case 0x8561:
+	case 0x8562:
 		model = cpumcf_z14_pmu_event_attr;
 		break;
 	default:

arch/s390/kernel/unwind_bc.c

@@ -20,7 +20,7 @@ EXPORT_SYMBOL_GPL(unwind_get_return_address);
 static bool outside_of_stack(struct unwind_state *state, unsigned long sp)
 {
 	return (sp <= state->sp) ||
-		(sp + sizeof(struct stack_frame) > state->stack_info.end);
+		(sp > state->stack_info.end - sizeof(struct stack_frame));
 }
 
 static bool update_stack_info(struct unwind_state *state, unsigned long sp)

arch/s390/pci/pci.c

@@ -890,8 +890,10 @@ static int __init pci_base_init(void)
 	if (!test_facility(69) || !test_facility(71))
 		return 0;
 
-	if (test_facility(153) && !s390_pci_no_mio)
+	if (test_facility(153) && !s390_pci_no_mio) {
 		static_branch_enable(&have_mio);
+		ctl_set_bit(2, 5);
+	}
 
 	rc = zpci_debug_init();
 	if (rc)

arch/s390/pci/pci_sysfs.c

@@ -37,6 +37,15 @@ zpci_attr(segment1, "0x%02x\n", pfip[1]);
 zpci_attr(segment2, "0x%02x\n", pfip[2]);
 zpci_attr(segment3, "0x%02x\n", pfip[3]);
 
+static ssize_t mio_enabled_show(struct device *dev,
+				struct device_attribute *attr, char *buf)
+{
+	struct zpci_dev *zdev = to_zpci(to_pci_dev(dev));
+
+	return sprintf(buf, zpci_use_mio(zdev) ? "1\n" : "0\n");
+}
+static DEVICE_ATTR_RO(mio_enabled);
+
 static ssize_t recover_store(struct device *dev, struct device_attribute *attr,
 			     const char *buf, size_t count)
 {
@@ -115,6 +124,7 @@ static struct attribute *zpci_dev_attrs[] = {
 	&dev_attr_vfn.attr,
 	&dev_attr_uid.attr,
 	&dev_attr_recover.attr,
+	&dev_attr_mio_enabled.attr,
 	NULL,
 };
 static struct attribute_group zpci_attr_group = {

drivers/s390/block/dasd_devmap.c

@@ -1642,6 +1642,35 @@ static DEVICE_ATTR(path_interval, 0644, dasd_path_interval_show,
 		   dasd_path_interval_store);
 
 
+#define DASD_DEFINE_ATTR(_name, _func)					\
+static ssize_t dasd_##_name##_show(struct device *dev,			\
+				   struct device_attribute *attr,	\
+				   char *buf)				\
+{									\
+	struct ccw_device *cdev = to_ccwdev(dev);			\
+	struct dasd_device *device = dasd_device_from_cdev(cdev);	\
+	int val = 0;							\
+									\
+	if (IS_ERR(device))						\
+		return -ENODEV;						\
+	if (device->discipline && _func)				\
+		val = _func(device);					\
+	dasd_put_device(device);					\
+									\
+	return snprintf(buf, PAGE_SIZE, "%d\n", val);			\
+}									\
+static DEVICE_ATTR(_name, 0444, dasd_##_name##_show, NULL);		\
+
+DASD_DEFINE_ATTR(ese, device->discipline->is_ese);
+DASD_DEFINE_ATTR(extent_size, device->discipline->ext_size);
+DASD_DEFINE_ATTR(pool_id, device->discipline->ext_pool_id);
+DASD_DEFINE_ATTR(space_configured, device->discipline->space_configured);
+DASD_DEFINE_ATTR(space_allocated, device->discipline->space_allocated);
+DASD_DEFINE_ATTR(logical_capacity, device->discipline->logical_capacity);
+DASD_DEFINE_ATTR(warn_threshold, device->discipline->ext_pool_warn_thrshld);
+DASD_DEFINE_ATTR(cap_at_warnlevel, device->discipline->ext_pool_cap_at_warnlevel);
+DASD_DEFINE_ATTR(pool_oos, device->discipline->ext_pool_oos);
+
 static struct attribute * dasd_attrs[] = {
 	&dev_attr_readonly.attr,
 	&dev_attr_discipline.attr,
@@ -1667,6 +1696,7 @@ static struct attribute * dasd_attrs[] = {
 	&dev_attr_path_interval.attr,
 	&dev_attr_path_reset.attr,
 	&dev_attr_hpf.attr,
+	&dev_attr_ese.attr,
 	NULL,
 };
 
@@ -1674,6 +1704,39 @@ static const struct attribute_group dasd_attr_group = {
 	.attrs = dasd_attrs,
 };
 
+static struct attribute *capacity_attrs[] = {
+	&dev_attr_space_configured.attr,
+	&dev_attr_space_allocated.attr,
+	&dev_attr_logical_capacity.attr,
+	NULL,
+};
+
+static const struct attribute_group capacity_attr_group = {
+	.name = "capacity",
+	.attrs = capacity_attrs,
+};
+
+static struct attribute *ext_pool_attrs[] = {
+	&dev_attr_pool_id.attr,
+	&dev_attr_extent_size.attr,
+	&dev_attr_warn_threshold.attr,
+	&dev_attr_cap_at_warnlevel.attr,
+	&dev_attr_pool_oos.attr,
+	NULL,
+};
+
+static const struct attribute_group ext_pool_attr_group = {
+	.name = "extent_pool",
+	.attrs = ext_pool_attrs,
+};
+
+static const struct attribute_group *dasd_attr_groups[] = {
+	&dasd_attr_group,
+	&capacity_attr_group,
+	&ext_pool_attr_group,
+	NULL,
+};
+
 /*
  * Return value of the specified feature.
  */
@@ -1715,16 +1778,15 @@ dasd_set_feature(struct ccw_device *cdev, int feature, int flag)
 EXPORT_SYMBOL(dasd_set_feature);
 
 
-int
-dasd_add_sysfs_files(struct ccw_device *cdev)
+int dasd_add_sysfs_files(struct ccw_device *cdev)
 {
-	return sysfs_create_group(&cdev->dev.kobj, &dasd_attr_group);
+	return sysfs_create_groups(&cdev->dev.kobj, dasd_attr_groups);
 }
 
 void
 dasd_remove_sysfs_files(struct ccw_device *cdev)
 {
-	sysfs_remove_group(&cdev->dev.kobj, &dasd_attr_group);
+	sysfs_remove_groups(&cdev->dev.kobj, dasd_attr_groups);
 }
 
 

drivers/s390/block/dasd_diag.c

@@ -615,14 +615,34 @@ dasd_diag_dump_sense(struct dasd_device *device, struct dasd_ccw_req * req,
 		    "dump sense not available for DIAG data");
 }
 
+/*
+ * Initialize block layer request queue.
+ */
+static void dasd_diag_setup_blk_queue(struct dasd_block *block)
+{
+	unsigned int logical_block_size = block->bp_block;
+	struct request_queue *q = block->request_queue;
+	int max;
+
+	max = DIAG_MAX_BLOCKS << block->s2b_shift;
+	blk_queue_flag_set(QUEUE_FLAG_NONROT, q);
+	q->limits.max_dev_sectors = max;
+	blk_queue_logical_block_size(q, logical_block_size);
+	blk_queue_max_hw_sectors(q, max);
+	blk_queue_max_segments(q, USHRT_MAX);
+	/* With page sized segments each segment can be translated into one idaw/tidaw */
+	blk_queue_max_segment_size(q, PAGE_SIZE);
+	blk_queue_segment_boundary(q, PAGE_SIZE - 1);
+}
+
 static struct dasd_discipline dasd_diag_discipline = {
 	.owner = THIS_MODULE,
 	.name = "DIAG",
 	.ebcname = "DIAG",
-	.max_blocks = DIAG_MAX_BLOCKS,
 	.check_device = dasd_diag_check_device,
 	.verify_path = dasd_generic_verify_path,
 	.fill_geometry = dasd_diag_fill_geometry,
+	.setup_blk_queue = dasd_diag_setup_blk_queue,
 	.start_IO = dasd_start_diag,
 	.term_IO = dasd_diag_term_IO,
 	.handle_terminated_request = dasd_diag_handle_terminated_request,

drivers/s390/block/dasd_eckd.h

@@ -50,15 +50,25 @@
 #define DASD_ECKD_CCW_PFX_READ		 0xEA
 #define DASD_ECKD_CCW_RSCK		 0xF9
 #define DASD_ECKD_CCW_RCD		 0xFA
+#define DASD_ECKD_CCW_DSO		 0xF7
+
+/* Define Subssystem Function / Orders */
+#define DSO_ORDER_RAS			 0x81
 
 /*
- * Perform Subsystem Function / Sub-Orders
+ * Perform Subsystem Function / Orders
  */
 #define PSF_ORDER_PRSSD			 0x18
 #define PSF_ORDER_CUIR_RESPONSE		 0x1A
-#define PSF_SUBORDER_QHA		 0x1C
 #define PSF_ORDER_SSC			 0x1D
 
+/*
+ * Perform Subsystem Function / Sub-Orders
+ */
+#define PSF_SUBORDER_QHA		 0x1C /* Query Host Access */
+#define PSF_SUBORDER_VSQ		 0x52 /* Volume Storage Query */
+#define PSF_SUBORDER_LCQ		 0x53 /* Logical Configuration Query */
+
 /*
  * CUIR response condition codes
  */
@@ -79,11 +89,23 @@
 #define CUIR_QUIESCE			 0x01
 #define CUIR_RESUME			 0x02
 
+/*
+ * Out-of-space (OOS) Codes
+ */
+#define REPO_WARN			 0x01
+#define REPO_EXHAUST			 0x02
+#define POOL_WARN			 0x03
+#define POOL_EXHAUST			 0x04
+#define REPO_RELIEVE			 0x05
+#define POOL_RELIEVE			 0x06
+
 /*
  * attention message definitions
  */
 #define ATTENTION_LENGTH_CUIR		 0x0e
 #define ATTENTION_FORMAT_CUIR		 0x01
+#define ATTENTION_LENGTH_OOS		 0x10
+#define ATTENTION_FORMAT_OOS		 0x06
 
 #define DASD_ECKD_PG_GROUPED		 0x10
 
@@ -99,6 +121,12 @@
 #define DASD_ECKD_PATH_THRHLD		 256
 #define DASD_ECKD_PATH_INTERVAL		 300
 
+/*
+ * Maximum number of blocks to be chained
+ */
+#define DASD_ECKD_MAX_BLOCKS		 190
+#define DASD_ECKD_MAX_BLOCKS_RAW	 256
+
 /*****************************************************************************
  * SECTION: Type Definitions
  ****************************************************************************/
@@ -116,35 +144,12 @@ struct ch_t {
 	__u16 head;
 } __attribute__ ((packed));
 
-struct chs_t {
-	__u16 cyl;
-	__u16 head;
-	__u32 sector;
-} __attribute__ ((packed));
-
 struct chr_t {
 	__u16 cyl;
 	__u16 head;
 	__u8 record;
 } __attribute__ ((packed));
 
-struct geom_t {
-	__u16 cyl;
-	__u16 head;
-	__u32 sector;
-} __attribute__ ((packed));
-
-struct eckd_home {
-	__u8 skip_control[14];
-	__u16 cell_number;
-	__u8 physical_addr[3];
-	__u8 flag;
-	struct ch_t track_addr;
-	__u8 reserved;
-	__u8 key_length;
-	__u8 reserved2[2];
-} __attribute__ ((packed));
-
 struct DE_eckd_data {
 	struct {
 		unsigned char perm:2;	/* Permissions on this extent */
@@ -387,6 +392,86 @@ struct dasd_rssd_messages {
 	char messages[4087];
 } __packed;
 
+/*
+ * Read Subsystem Data - Volume Storage Query
+ */
+struct dasd_rssd_vsq {
+	struct {
+		__u8 tse:1;
+		__u8 space_not_available:1;
+		__u8 ese:1;
+		__u8 unused:5;
+	} __packed vol_info;
+	__u8 unused1;
+	__u16 extent_pool_id;
+	__u8 warn_cap_limit;
+	__u8 warn_cap_guaranteed;
+	__u16 unused2;
+	__u32 limit_capacity;
+	__u32 guaranteed_capacity;
+	__u32 space_allocated;
+	__u32 space_configured;
+	__u32 logical_capacity;
+} __packed;
+
+/*
+ * Extent Pool Summary
+ */
+struct dasd_ext_pool_sum {
+	__u16 pool_id;
+	__u8 repo_warn_thrshld;
+	__u8 warn_thrshld;
+	struct {
+		__u8 type:1;			/* 0 - CKD / 1 - FB */
+		__u8 track_space_efficient:1;
+		__u8 extent_space_efficient:1;
+		__u8 standard_volume:1;
+		__u8 extent_size_valid:1;
+		__u8 capacity_at_warnlevel:1;
+		__u8 pool_oos:1;
+		__u8 unused0:1;
+		__u8 unused1;
+	} __packed flags;
+	struct {
+		__u8 reserved0:1;
+		__u8 size_1G:1;
+		__u8 reserved1:5;
+		__u8 size_16M:1;
+	} __packed extent_size;
+	__u8 unused;
+} __packed;
+
+/*
+ * Read Subsystem Data-Response - Logical Configuration Query - Header
+ */
+struct dasd_rssd_lcq {
+	__u16 data_length;		/* Length of data returned */
+	__u16 pool_count;		/* Count of extent pools returned - Max: 448 */
+	struct {
+		__u8 pool_info_valid:1;	/* Detailed Information valid */
+		__u8 pool_id_volume:1;
+		__u8 pool_id_cec:1;
+		__u8 unused0:5;
+		__u8 unused1;
+	} __packed header_flags;
+	char sfi_type[6];		/* Storage Facility Image Type (EBCDIC) */
+	char sfi_model[3];		/* Storage Facility Image Model (EBCDIC) */
+	__u8 sfi_seq_num[10];		/* Storage Facility Image Sequence Number */
+	__u8 reserved[7];
+	struct dasd_ext_pool_sum ext_pool_sum[448];
+} __packed;
+
+struct dasd_oos_message {
+	__u16 length;
+	__u8 format;
+	__u8 code;
+	__u8 percentage_empty;
+	__u8 reserved;
+	__u16 ext_pool_id;
+	__u16 token;
+	__u8 unused[6];
+} __packed;
+
 struct dasd_cuir_message {
 	__u16 length;
 	__u8 format;
@@ -461,6 +546,42 @@ struct dasd_psf_ssc_data {
 	unsigned char reserved[59];
 } __attribute__((packed));
 
+/* Maximum number of extents for a single Release Allocated Space command */
+#define DASD_ECKD_RAS_EXTS_MAX		110U
+
+struct dasd_dso_ras_ext_range {
+	struct ch_t beg_ext;
+	struct ch_t end_ext;
+} __packed;
+
+/*
+ * Define Subsytem Operation - Release Allocated Space
+ */
+struct dasd_dso_ras_data {
+	__u8 order;
+	struct {
+		__u8 message:1;		/* Must be zero */
+		__u8 reserved1:2;
+		__u8 vol_type:1;	/* 0 - CKD/FBA, 1 - FB */
+		__u8 reserved2:4;
+	} __packed flags;
+	/* Operation Flags to specify scope */
+	struct {
+		__u8 reserved1:2;
+		/* Release Space by Extent */
+		__u8 by_extent:1;	/* 0 - entire volume, 1 - specified extents */
+		__u8 guarantee_init:1;
+		__u8 force_release:1;	/* Internal - will be ignored */
+		__u16 reserved2:11;
+	} __packed op_flags;
+	__u8 lss;
+	__u8 dev_addr;
+	__u32 reserved1;
+	__u8 reserved2[10];
+	__u16 nr_exts;			/* Defines number of ext_scope - max 110 */
+	__u16 reserved3;
+} __packed;
+
 
 /*
  * some structures and definitions for alias handling
@@ -551,6 +672,8 @@ struct dasd_eckd_private {
 	int uses_cdl;
 	struct attrib_data_t attrib;	/* e.g. cache operations */
 	struct dasd_rssd_features features;
+	struct dasd_rssd_vsq vsq;
+	struct dasd_ext_pool_sum eps;
 	u32 real_cyl;
 
 	/* alias managemnet */
@@ -572,7 +695,5 @@ int dasd_alias_remove_device(struct dasd_device *);
 struct dasd_device *dasd_alias_get_start_dev(struct dasd_device *);
 void dasd_alias_handle_summary_unit_check(struct work_struct *);
 void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *);
-void dasd_alias_lcu_setup_complete(struct dasd_device *);
-void dasd_alias_wait_for_lcu_setup(struct dasd_device *);
 int dasd_alias_update_add_device(struct dasd_device *);
 #endif				/* DASD_ECKD_H */

drivers/s390/block/dasd_eer.c

@@ -386,6 +386,7 @@ void dasd_eer_write(struct dasd_device *device, struct dasd_ccw_req *cqr,
 		dasd_eer_write_standard_trigger(device, cqr, id);
 		break;
 	case DASD_EER_NOPATH:
+	case DASD_EER_NOSPC:
 		dasd_eer_write_standard_trigger(device, NULL, id);
 		break;
 	case DASD_EER_STATECHANGE:

drivers/s390/block/dasd_fba.c

@@ -770,27 +770,46 @@ dasd_fba_dump_sense(struct dasd_device *device, struct dasd_ccw_req * req,
 }
 
 /*
- * max_blocks is dependent on the amount of storage that is available
- * in the static io buffer for each device. Currently each device has
- * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has
- * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use
- * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In
- * addition we have one define extent ccw + 16 bytes of data and a
- * locate record ccw for each block (stupid devices!) + 16 bytes of data.
- * That makes:
- * (8192 - 24 - 136 - 8 - 16) / 40 = 200.2 blocks at maximum.
- * We want to fit two into the available memory so that we can immediately
- * start the next request if one finishes off. That makes 100.1 blocks
- * for one request. Give a little safety and the result is 96.
+ * Initialize block layer request queue.
  */
+static void dasd_fba_setup_blk_queue(struct dasd_block *block)
+{
+	unsigned int logical_block_size = block->bp_block;
+	struct request_queue *q = block->request_queue;
+	unsigned int max_bytes, max_discard_sectors;
+	int max;
+
+	max = DASD_FBA_MAX_BLOCKS << block->s2b_shift;
+	blk_queue_flag_set(QUEUE_FLAG_NONROT, q);
+	q->limits.max_dev_sectors = max;
+	blk_queue_logical_block_size(q, logical_block_size);
+	blk_queue_max_hw_sectors(q, max);
+	blk_queue_max_segments(q, USHRT_MAX);
+	/* With page sized segments each segment can be translated into one idaw/tidaw */
+	blk_queue_max_segment_size(q, PAGE_SIZE);
+	blk_queue_segment_boundary(q, PAGE_SIZE - 1);
+
+	q->limits.discard_granularity = logical_block_size;
+	q->limits.discard_alignment = PAGE_SIZE;
+
+	/* Calculate max_discard_sectors and make it PAGE aligned */
+	max_bytes = USHRT_MAX * logical_block_size;
+	max_bytes = ALIGN_DOWN(max_bytes, PAGE_SIZE);
+	max_discard_sectors = max_bytes / logical_block_size;
+
+	blk_queue_max_discard_sectors(q, max_discard_sectors);
+	blk_queue_max_write_zeroes_sectors(q, max_discard_sectors);
+	blk_queue_flag_set(QUEUE_FLAG_DISCARD, q);
+}
+
 static struct dasd_discipline dasd_fba_discipline = {
 	.owner = THIS_MODULE,
 	.name = "FBA ",
 	.ebcname = "FBA ",
-	.max_blocks = 96,
 	.check_device = dasd_fba_check_characteristics,
 	.do_analysis = dasd_fba_do_analysis,
 	.verify_path = dasd_generic_verify_path,
+	.setup_blk_queue = dasd_fba_setup_blk_queue,
 	.fill_geometry = dasd_fba_fill_geometry,
 	.start_IO = dasd_start_IO,
 	.term_IO = dasd_term_IO,

drivers/s390/block/dasd_fba.h

@@ -9,6 +9,11 @@
 #ifndef DASD_FBA_H
 #define DASD_FBA_H
 
+/*
+ * Maximum number of blocks to be chained
+ */
+#define DASD_FBA_MAX_BLOCKS		96
+
 struct DE_fba_data {
 	struct {
 		unsigned char perm:2;	/* Permissions on this extent */

drivers/s390/block/dasd_int.h

@@ -268,7 +268,6 @@ struct dasd_discipline {
 	struct module *owner;
 	char ebcname[8];	/* a name used for tagging and printks */
 	char name[8];		/* a name used for tagging and printks */
-	int max_blocks;		/* maximum number of blocks to be chained */
 
 	struct list_head list;	/* used for list of disciplines */
 
@@ -307,6 +306,10 @@ struct dasd_discipline {
 	int (*online_to_ready) (struct dasd_device *);
 	int (*basic_to_known)(struct dasd_device *);
 
+	/*
+	 * Initialize block layer request queue.
+	 */
+	void (*setup_blk_queue)(struct dasd_block *);
 	/* (struct dasd_device *);
 	 * Device operation functions. build_cp creates a ccw chain for
 	 * a block device request, start_io starts the request and
@@ -367,6 +370,25 @@ struct dasd_discipline {
 	void (*disable_hpf)(struct dasd_device *);
 	int (*hpf_enabled)(struct dasd_device *);
 	void (*reset_path)(struct dasd_device *, __u8);
+
+	/*
+	 * Extent Space Efficient (ESE) relevant functions
+	 */
+	int (*is_ese)(struct dasd_device *);
+	/* Capacity */
+	int (*space_allocated)(struct dasd_device *);
+	int (*space_configured)(struct dasd_device *);
+	int (*logical_capacity)(struct dasd_device *);
+	int (*release_space)(struct dasd_device *, struct format_data_t *);
+	/* Extent Pool */
+	int (*ext_pool_id)(struct dasd_device *);
+	int (*ext_size)(struct dasd_device *);
+	int (*ext_pool_cap_at_warnlevel)(struct dasd_device *);
+	int (*ext_pool_warn_thrshld)(struct dasd_device *);
+	int (*ext_pool_oos)(struct dasd_device *);
+	int (*ext_pool_exhaust)(struct dasd_device *, struct dasd_ccw_req *);
+	struct dasd_ccw_req *(*ese_format)(struct dasd_device *, struct dasd_ccw_req *);
+	void (*ese_read)(struct dasd_ccw_req *);
 };
 
 extern struct dasd_discipline *dasd_diag_discipline_pointer;
@@ -386,6 +408,7 @@ extern struct dasd_discipline *dasd_diag_discipline_pointer;
 #define DASD_EER_NOPATH      2
 #define DASD_EER_STATECHANGE 3
 #define DASD_EER_PPRCSUSPEND 4
+#define DASD_EER_NOSPC	     5
 
 /* DASD path handling */
 
@@ -482,8 +505,10 @@ struct dasd_device {
 	spinlock_t mem_lock;
 	void *ccw_mem;
 	void *erp_mem;
+	void *ese_mem;
 	struct list_head ccw_chunks;
 	struct list_head erp_chunks;
+	struct list_head ese_chunks;
 
 	atomic_t tasklet_scheduled;
         struct tasklet_struct tasklet;
@@ -558,6 +583,7 @@ struct dasd_queue {
 #define DASD_STOPPED_SU      16        /* summary unit check handling */
 #define DASD_STOPPED_PM      32        /* pm state transition */
 #define DASD_UNRESUMED_PM    64        /* pm resume failed state */
+#define DASD_STOPPED_NOSPC   128       /* no space left */
 
 /* per device flags */
 #define DASD_FLAG_OFFLINE	3	/* device is in offline processing */
@@ -700,7 +726,9 @@ extern struct kmem_cache *dasd_page_cache;
 
 struct dasd_ccw_req *
 dasd_smalloc_request(int, int, int, struct dasd_device *, struct dasd_ccw_req *);
+struct dasd_ccw_req *dasd_fmalloc_request(int, int, int, struct dasd_device *);
 void dasd_sfree_request(struct dasd_ccw_req *, struct dasd_device *);
+void dasd_ffree_request(struct dasd_ccw_req *, struct dasd_device *);
 void dasd_wakeup_cb(struct dasd_ccw_req *, void *);
 
 struct dasd_device *dasd_alloc_device(void);
@@ -727,6 +755,7 @@ void dasd_schedule_block_bh(struct dasd_block *);
 int  dasd_sleep_on(struct dasd_ccw_req *);
 int  dasd_sleep_on_queue(struct list_head *);
 int  dasd_sleep_on_immediatly(struct dasd_ccw_req *);
+int  dasd_sleep_on_queue_interruptible(struct list_head *);
 int  dasd_sleep_on_interruptible(struct dasd_ccw_req *);
 void dasd_device_set_timer(struct dasd_device *, int);
 void dasd_device_clear_timer(struct dasd_device *);
@@ -750,6 +779,8 @@ int dasd_generic_restore_device(struct ccw_device *);
 enum uc_todo dasd_generic_uc_handler(struct ccw_device *, struct irb *);
 void dasd_generic_path_event(struct ccw_device *, int *);
 int dasd_generic_verify_path(struct dasd_device *, __u8);
+void dasd_generic_space_exhaust(struct dasd_device *, struct dasd_ccw_req *);
+void dasd_generic_space_avail(struct dasd_device *);
 
 int dasd_generic_read_dev_chars(struct dasd_device *, int, void *, int);
 char *dasd_get_sense(struct irb *);

drivers/s390/block/dasd_ioctl.c

@@ -333,6 +333,59 @@ static int dasd_ioctl_check_format(struct block_device *bdev, void __user *argp)
 	return rc;
 }
 
+static int dasd_release_space(struct dasd_device *device,
+			      struct format_data_t *rdata)
+{
+	if (!device->discipline->is_ese && !device->discipline->is_ese(device))
+		return -ENOTSUPP;
+	if (!device->discipline->release_space)
+		return -ENOTSUPP;
+
+	return device->discipline->release_space(device, rdata);
+}
+
+/*
+ * Release allocated space
+ */
+static int dasd_ioctl_release_space(struct block_device *bdev, void __user *argp)
+{
+	struct format_data_t rdata;
+	struct dasd_device *base;
+	int rc = 0;
+
+	if (!capable(CAP_SYS_ADMIN))
+		return -EACCES;
+	if (!argp)
+		return -EINVAL;
+
+	base = dasd_device_from_gendisk(bdev->bd_disk);
+	if (!base)
+		return -ENODEV;
+	if (base->features & DASD_FEATURE_READONLY ||
+	    test_bit(DASD_FLAG_DEVICE_RO, &base->flags)) {
+		rc = -EROFS;
+		goto out_err;
+	}
+	if (bdev != bdev->bd_contains) {
+		pr_warn("%s: The specified DASD is a partition and tracks cannot be released\n",
+			dev_name(&base->cdev->dev));
+		rc = -EINVAL;
+		goto out_err;
+	}
+
+	if (copy_from_user(&rdata, argp, sizeof(rdata))) {
+		rc = -EFAULT;
+		goto out_err;
+	}
+
+	rc = dasd_release_space(base, &rdata);
+
+out_err:
+	dasd_put_device(base);
+
+	return rc;
+}
+
 #ifdef CONFIG_DASD_PROFILE
 /*
  * Reset device profile information
@@ -595,6 +648,9 @@ int dasd_ioctl(struct block_device *bdev, fmode_t mode,
 	case BIODASDREADALLCMB:
 		rc = dasd_ioctl_readall_cmb(block, cmd, argp);
 		break;
+	case BIODASDRAS:
+		rc = dasd_ioctl_release_space(bdev, argp);
+		break;
 	default:
 		/* if the discipline has an ioctl method try it. */
 		rc = -ENOTTY;

drivers/s390/char/sclp_early.c

@@ -41,7 +41,6 @@ static void __init sclp_early_facilities_detect(struct read_info_sccb *sccb)
 	sclp.has_hvs = !!(sccb->fac119 & 0x80);
 	sclp.has_kss = !!(sccb->fac98 & 0x01);
 	sclp.has_sipl = !!(sccb->cbl & 0x02);
-	sclp.has_sipl_g2 = !!(sccb->cbl & 0x04);
 	if (sccb->fac85 & 0x02)
 		S390_lowcore.machine_flags |= MACHINE_FLAG_ESOP;
 	if (sccb->fac91 & 0x40)

drivers/s390/crypto/ap_bus.c

@@ -208,7 +208,6 @@ static inline int ap_query_configuration(struct ap_config_info *info)
 		return -EINVAL;
 	return ap_qci(info);
 }
-EXPORT_SYMBOL(ap_query_configuration);
 
 /**
  * ap_init_configuration(): Allocate and query configuration array.

drivers/s390/crypto/vfio_ap_ops.c

@@ -115,7 +115,6 @@ static void vfio_ap_wait_for_irqclear(int apqn)
  * Unregisters the ISC in the GIB when the saved ISC not invalid.
  * Unpin the guest's page holding the NIB when it exist.
  * Reset the saved_pfn and saved_isc to invalid values.
- * Clear the pointer to the matrix mediated device.
  *
  */
 static void vfio_ap_free_aqic_resources(struct vfio_ap_queue *q)
@@ -127,7 +126,6 @@ static void vfio_ap_free_aqic_resources(struct vfio_ap_queue *q)
 				 &q->saved_pfn, 1);
 	q->saved_pfn = 0;
 	q->saved_isc = VFIO_AP_ISC_INVALID;
-	q->matrix_mdev = NULL;
 }
 
 /**
@@ -179,6 +177,7 @@ struct ap_queue_status vfio_ap_irq_disable(struct vfio_ap_queue *q)
 		  status.response_code);
 end_free:
 	vfio_ap_free_aqic_resources(q);
+	q->matrix_mdev = NULL;
 	return status;
 }