1 files changed, 748 insertions, 0 deletions

diff --git a/drivers/s390/char/zcore.c b/drivers/s390/char/zcore.c
new file mode 100644
index 00000000..3303d66b
--- /dev/null
+++ b/drivers/s390/char/zcore.c
@@ -0,0 +1,748 @@
+/*
+ * zcore module to export memory content and register sets for creating system
+ * dumps on SCSI disks (zfcpdump). The "zcore/mem" debugfs file shows the same
+ * dump format as s390 standalone dumps.
+ *
+ * For more information please refer to Documentation/s390/zfcpdump.txt
+ *
+ * Copyright IBM Corp. 2003,2008
+ * Author(s): Michael Holzheu
+ */
+
+#define KMSG_COMPONENT "zdump"
+#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/miscdevice.h>
+#include <linux/debugfs.h>
+#include <linux/module.h>
+#include <asm/asm-offsets.h>
+#include <asm/ipl.h>
+#include <asm/sclp.h>
+#include <asm/setup.h>
+#include <asm/uaccess.h>
+#include <asm/debug.h>
+#include <asm/processor.h>
+#include <asm/irqflags.h>
+#include <asm/checksum.h>
+#include "sclp.h"
+
+#define TRACE(x...) debug_sprintf_event(zcore_dbf, 1, x)
+
+#define TO_USER		0
+#define TO_KERNEL	1
+#define CHUNK_INFO_SIZE	34 /* 2 16-byte char, each followed by blank */
+
+enum arch_id {
+	ARCH_S390	= 0,
+	ARCH_S390X	= 1,
+};
+
+/* dump system info */
+
+struct sys_info {
+	enum arch_id	 arch;
+	unsigned long	 sa_base;
+	u32		 sa_size;
+	int		 cpu_map[NR_CPUS];
+	unsigned long	 mem_size;
+	struct save_area lc_mask;
+};
+
+struct ipib_info {
+	unsigned long	ipib;
+	u32		checksum;
+}  __attribute__((packed));
+
+static struct sys_info sys_info;
+static struct debug_info *zcore_dbf;
+static int hsa_available;
+static struct dentry *zcore_dir;
+static struct dentry *zcore_file;
+static struct dentry *zcore_memmap_file;
+static struct dentry *zcore_reipl_file;
+static struct ipl_parameter_block *ipl_block;
+
+/*
+ * Copy memory from HSA to kernel or user memory (not reentrant):
+ *
+ * @dest:  Kernel or user buffer where memory should be copied to
+ * @src:   Start address within HSA where data should be copied
+ * @count: Size of buffer, which should be copied
+ * @mode:  Either TO_KERNEL or TO_USER
+ */
+static int memcpy_hsa(void *dest, unsigned long src, size_t count, int mode)
+{
+	int offs, blk_num;
+	static char buf[PAGE_SIZE] __attribute__((__aligned__(PAGE_SIZE)));
+
+	if (count == 0)
+		return 0;
+
+	/* copy first block */
+	offs = 0;
+	if ((src % PAGE_SIZE) != 0) {
+		blk_num = src / PAGE_SIZE + 2;
+		if (sclp_sdias_copy(buf, blk_num, 1)) {
+			TRACE("sclp_sdias_copy() failed\n");
+			return -EIO;
+		}
+		offs = min((PAGE_SIZE - (src % PAGE_SIZE)), count);
+		if (mode == TO_USER) {
+			if (copy_to_user((__force __user void*) dest,
+					 buf + (src % PAGE_SIZE), offs))
+				return -EFAULT;
+		} else
+			memcpy(dest, buf + (src % PAGE_SIZE), offs);
+	}
+	if (offs == count)
+		goto out;
+
+	/* copy middle */
+	for (; (offs + PAGE_SIZE) <= count; offs += PAGE_SIZE) {
+		blk_num = (src + offs) / PAGE_SIZE + 2;
+		if (sclp_sdias_copy(buf, blk_num, 1)) {
+			TRACE("sclp_sdias_copy() failed\n");
+			return -EIO;
+		}
+		if (mode == TO_USER) {
+			if (copy_to_user((__force __user void*) dest + offs,
+					 buf, PAGE_SIZE))
+				return -EFAULT;
+		} else
+			memcpy(dest + offs, buf, PAGE_SIZE);
+	}
+	if (offs == count)
+		goto out;
+
+	/* copy last block */
+	blk_num = (src + offs) / PAGE_SIZE + 2;
+	if (sclp_sdias_copy(buf, blk_num, 1)) {
+		TRACE("sclp_sdias_copy() failed\n");
+		return -EIO;
+	}
+	if (mode == TO_USER) {
+		if (copy_to_user((__force __user void*) dest + offs, buf,
+				 PAGE_SIZE))
+			return -EFAULT;
+	} else
+		memcpy(dest + offs, buf, count - offs);
+out:
+	return 0;
+}
+
+static int memcpy_hsa_user(void __user *dest, unsigned long src, size_t count)
+{
+	return memcpy_hsa((void __force *) dest, src, count, TO_USER);
+}
+
+static int memcpy_hsa_kernel(void *dest, unsigned long src, size_t count)
+{
+	return memcpy_hsa(dest, src, count, TO_KERNEL);
+}
+
+static int __init init_cpu_info(enum arch_id arch)
+{
+	struct save_area *sa;
+
+	/* get info for boot cpu from lowcore, stored in the HSA */
+
+	sa = kmalloc(sizeof(*sa), GFP_KERNEL);
+	if (!sa)
+		return -ENOMEM;
+	if (memcpy_hsa_kernel(sa, sys_info.sa_base, sys_info.sa_size) < 0) {
+		TRACE("could not copy from HSA\n");
+		kfree(sa);
+		return -EIO;
+	}
+	zfcpdump_save_areas[0] = sa;
+	return 0;
+}
+
+static DEFINE_MUTEX(zcore_mutex);
+
+#define DUMP_VERSION	0x5
+#define DUMP_MAGIC	0xa8190173618f23fdULL
+#define DUMP_ARCH_S390X	2
+#define DUMP_ARCH_S390	1
+#define HEADER_SIZE	4096
+
+/* dump header dumped according to s390 crash dump format */
+
+struct zcore_header {
+	u64 magic;
+	u32 version;
+	u32 header_size;
+	u32 dump_level;
+	u32 page_size;
+	u64 mem_size;
+	u64 mem_start;
+	u64 mem_end;
+	u32 num_pages;
+	u32 pad1;
+	u64 tod;
+	struct cpuid cpu_id;
+	u32 arch_id;
+	u32 volnr;
+	u32 build_arch;
+	u64 rmem_size;
+	u8 mvdump;
+	u16 cpu_cnt;
+	u16 real_cpu_cnt;
+	u8 end_pad1[0x200-0x061];
+	u64 mvdump_sign;
+	u64 mvdump_zipl_time;
+	u8 end_pad2[0x800-0x210];
+	u32 lc_vec[512];
+} __attribute__((packed,__aligned__(16)));
+
+static struct zcore_header zcore_header = {
+	.magic		= DUMP_MAGIC,
+	.version	= DUMP_VERSION,
+	.header_size	= 4096,
+	.dump_level	= 0,
+	.page_size	= PAGE_SIZE,
+	.mem_start	= 0,
+#ifdef CONFIG_64BIT
+	.build_arch	= DUMP_ARCH_S390X,
+#else
+	.build_arch	= DUMP_ARCH_S390,
+#endif
+};
+
+/*
+ * Copy lowcore info to buffer. Use map in order to copy only register parts.
+ *
+ * @buf:    User buffer
+ * @sa:     Pointer to save area
+ * @sa_off: Offset in save area to copy
+ * @len:    Number of bytes to copy
+ */
+static int copy_lc(void __user *buf, void *sa, int sa_off, int len)
+{
+	int i;
+	char *lc_mask = (char*)&sys_info.lc_mask;
+
+	for (i = 0; i < len; i++) {
+		if (!lc_mask[i + sa_off])
+			continue;
+		if (copy_to_user(buf + i, sa + sa_off + i, 1))
+			return -EFAULT;
+	}
+	return 0;
+}
+
+/*
+ * Copy lowcores info to memory, if necessary
+ *
+ * @buf:   User buffer
+ * @addr:  Start address of buffer in dump memory
+ * @count: Size of buffer
+ */
+static int zcore_add_lc(char __user *buf, unsigned long start, size_t count)
+{
+	unsigned long end;
+	int i = 0;
+
+	if (count == 0)
+		return 0;
+
+	end = start + count;
+	while (zfcpdump_save_areas[i]) {
+		unsigned long cp_start, cp_end; /* copy range */
+		unsigned long sa_start, sa_end; /* save area range */
+		unsigned long prefix;
+		unsigned long sa_off, len, buf_off;
+
+		prefix = zfcpdump_save_areas[i]->pref_reg;
+		sa_start = prefix + sys_info.sa_base;
+		sa_end = prefix + sys_info.sa_base + sys_info.sa_size;
+
+		if ((end < sa_start) || (start > sa_end))
+			goto next;
+		cp_start = max(start, sa_start);
+		cp_end = min(end, sa_end);
+
+		buf_off = cp_start - start;
+		sa_off = cp_start - sa_start;
+		len = cp_end - cp_start;
+
+		TRACE("copy_lc for: %lx\n", start);
+		if (copy_lc(buf + buf_off, zfcpdump_save_areas[i], sa_off, len))
+			return -EFAULT;
+next:
+		i++;
+	}
+	return 0;
+}
+
+/*
+ * Read routine for zcore character device
+ * First 4K are dump header
+ * Next 32MB are HSA Memory
+ * Rest is read from absolute Memory
+ */
+static ssize_t zcore_read(struct file *file, char __user *buf, size_t count,
+			  loff_t *ppos)
+{
+	unsigned long mem_start; /* Start address in memory */
+	size_t mem_offs;	 /* Offset in dump memory */
+	size_t hdr_count;	 /* Size of header part of output buffer */
+	size_t size;
+	int rc;
+
+	mutex_lock(&zcore_mutex);
+
+	if (*ppos > (sys_info.mem_size + HEADER_SIZE)) {
+		rc = -EINVAL;
+		goto fail;
+	}
+
+	count = min(count, (size_t) (sys_info.mem_size + HEADER_SIZE - *ppos));
+
+	/* Copy dump header */
+	if (*ppos < HEADER_SIZE) {
+		size = min(count, (size_t) (HEADER_SIZE - *ppos));
+		if (copy_to_user(buf, &zcore_header + *ppos, size)) {
+			rc = -EFAULT;
+			goto fail;
+		}
+		hdr_count = size;
+		mem_start = 0;
+	} else {
+		hdr_count = 0;
+		mem_start = *ppos - HEADER_SIZE;
+	}
+
+	mem_offs = 0;
+
+	/* Copy from HSA data */
+	if (*ppos < (ZFCPDUMP_HSA_SIZE + HEADER_SIZE)) {
+		size = min((count - hdr_count), (size_t) (ZFCPDUMP_HSA_SIZE
+			   - mem_start));
+		rc = memcpy_hsa_user(buf + hdr_count, mem_start, size);
+		if (rc)
+			goto fail;
+
+		mem_offs += size;
+	}
+
+	/* Copy from real mem */
+	size = count - mem_offs - hdr_count;
+	rc = copy_to_user_real(buf + hdr_count + mem_offs,
+			       (void *) mem_start + mem_offs, size);
+	if (rc)
+		goto fail;
+
+	/*
+	 * Since s390 dump analysis tools like lcrash or crash
+	 * expect register sets in the prefix pages of the cpus,
+	 * we copy them into the read buffer, if necessary.
+	 * buf + hdr_count: Start of memory part of output buffer
+	 * mem_start: Start memory address to copy from
+	 * count - hdr_count: Size of memory area to copy
+	 */
+	if (zcore_add_lc(buf + hdr_count, mem_start, count - hdr_count)) {
+		rc = -EFAULT;
+		goto fail;
+	}
+	*ppos += count;
+fail:
+	mutex_unlock(&zcore_mutex);
+	return (rc < 0) ? rc : count;
+}
+
+static int zcore_open(struct inode *inode, struct file *filp)
+{
+	if (!hsa_available)
+		return -ENODATA;
+	else
+		return capable(CAP_SYS_RAWIO) ? 0 : -EPERM;
+}
+
+static int zcore_release(struct inode *inode, struct file *filep)
+{
+	diag308(DIAG308_REL_HSA, NULL);
+	hsa_available = 0;
+	return 0;
+}
+
+static loff_t zcore_lseek(struct file *file, loff_t offset, int orig)
+{
+	loff_t rc;
+
+	mutex_lock(&zcore_mutex);
+	switch (orig) {
+	case 0:
+		file->f_pos = offset;
+		rc = file->f_pos;
+		break;
+	case 1:
+		file->f_pos += offset;
+		rc = file->f_pos;
+		break;
+	default:
+		rc = -EINVAL;
+	}
+	mutex_unlock(&zcore_mutex);
+	return rc;
+}
+
+static const struct file_operations zcore_fops = {
+	.owner		= THIS_MODULE,
+	.llseek		= zcore_lseek,
+	.read		= zcore_read,
+	.open		= zcore_open,
+	.release	= zcore_release,
+};
+
+static ssize_t zcore_memmap_read(struct file *filp, char __user *buf,
+				 size_t count, loff_t *ppos)
+{
+	return simple_read_from_buffer(buf, count, ppos, filp->private_data,
+				       MEMORY_CHUNKS * CHUNK_INFO_SIZE);
+}
+
+static int zcore_memmap_open(struct inode *inode, struct file *filp)
+{
+	int i;
+	char *buf;
+	struct mem_chunk *chunk_array;
+
+	chunk_array = kzalloc(MEMORY_CHUNKS * sizeof(struct mem_chunk),
+			      GFP_KERNEL);
+	if (!chunk_array)
+		return -ENOMEM;
+	detect_memory_layout(chunk_array);
+	buf = kzalloc(MEMORY_CHUNKS * CHUNK_INFO_SIZE, GFP_KERNEL);
+	if (!buf) {
+		kfree(chunk_array);
+		return -ENOMEM;
+	}
+	for (i = 0; i < MEMORY_CHUNKS; i++) {
+		sprintf(buf + (i * CHUNK_INFO_SIZE), "%016llx %016llx ",
+			(unsigned long long) chunk_array[i].addr,
+			(unsigned long long) chunk_array[i].size);
+		if (chunk_array[i].size == 0)
+			break;
+	}
+	kfree(chunk_array);
+	filp->private_data = buf;
+	return nonseekable_open(inode, filp);
+}
+
+static int zcore_memmap_release(struct inode *inode, struct file *filp)
+{
+	kfree(filp->private_data);
+	return 0;
+}
+
+static const struct file_operations zcore_memmap_fops = {
+	.owner		= THIS_MODULE,
+	.read		= zcore_memmap_read,
+	.open		= zcore_memmap_open,
+	.release	= zcore_memmap_release,
+	.llseek		= no_llseek,
+};
+
+static ssize_t zcore_reipl_write(struct file *filp, const char __user *buf,
+				 size_t count, loff_t *ppos)
+{
+	if (ipl_block) {
+		diag308(DIAG308_SET, ipl_block);
+		diag308(DIAG308_IPL, NULL);
+	}
+	return count;
+}
+
+static int zcore_reipl_open(struct inode *inode, struct file *filp)
+{
+	return nonseekable_open(inode, filp);
+}
+
+static int zcore_reipl_release(struct inode *inode, struct file *filp)
+{
+	return 0;
+}
+
+static const struct file_operations zcore_reipl_fops = {
+	.owner		= THIS_MODULE,
+	.write		= zcore_reipl_write,
+	.open		= zcore_reipl_open,
+	.release	= zcore_reipl_release,
+	.llseek		= no_llseek,
+};
+
+#ifdef CONFIG_32BIT
+
+static void __init set_lc_mask(struct save_area *map)
+{
+	memset(&map->ext_save, 0xff, sizeof(map->ext_save));
+	memset(&map->timer, 0xff, sizeof(map->timer));
+	memset(&map->clk_cmp, 0xff, sizeof(map->clk_cmp));
+	memset(&map->psw, 0xff, sizeof(map->psw));
+	memset(&map->pref_reg, 0xff, sizeof(map->pref_reg));
+	memset(&map->acc_regs, 0xff, sizeof(map->acc_regs));
+	memset(&map->fp_regs, 0xff, sizeof(map->fp_regs));
+	memset(&map->gp_regs, 0xff, sizeof(map->gp_regs));
+	memset(&map->ctrl_regs, 0xff, sizeof(map->ctrl_regs));
+}
+
+#else /* CONFIG_32BIT */
+
+static void __init set_lc_mask(struct save_area *map)
+{
+	memset(&map->fp_regs, 0xff, sizeof(map->fp_regs));
+	memset(&map->gp_regs, 0xff, sizeof(map->gp_regs));
+	memset(&map->psw, 0xff, sizeof(map->psw));
+	memset(&map->pref_reg, 0xff, sizeof(map->pref_reg));
+	memset(&map->fp_ctrl_reg, 0xff, sizeof(map->fp_ctrl_reg));
+	memset(&map->tod_reg, 0xff, sizeof(map->tod_reg));
+	memset(&map->timer, 0xff, sizeof(map->timer));
+	memset(&map->clk_cmp, 0xff, sizeof(map->clk_cmp));
+	memset(&map->acc_regs, 0xff, sizeof(map->acc_regs));
+	memset(&map->ctrl_regs, 0xff, sizeof(map->ctrl_regs));
+}
+
+#endif /* CONFIG_32BIT */
+
+/*
+ * Initialize dump globals for a given architecture
+ */
+static int __init sys_info_init(enum arch_id arch)
+{
+	int rc;
+
+	switch (arch) {
+	case ARCH_S390X:
+		pr_alert("DETECTED 'S390X (64 bit) OS'\n");
+		break;
+	case ARCH_S390:
+		pr_alert("DETECTED 'S390 (32 bit) OS'\n");
+		break;
+	default:
+		pr_alert("0x%x is an unknown architecture.\n",arch);
+		return -EINVAL;
+	}
+	sys_info.sa_base = SAVE_AREA_BASE;
+	sys_info.sa_size = sizeof(struct save_area);
+	sys_info.arch = arch;
+	set_lc_mask(&sys_info.lc_mask);
+	rc = init_cpu_info(arch);
+	if (rc)
+		return rc;
+	sys_info.mem_size = real_memory_size;
+
+	return 0;
+}
+
+static int __init check_sdias(void)
+{
+	int rc, act_hsa_size;
+
+	rc = sclp_sdias_blk_count();
+	if (rc < 0) {
+		TRACE("Could not determine HSA size\n");
+		return rc;
+	}
+	act_hsa_size = (rc - 1) * PAGE_SIZE;
+	if (act_hsa_size < ZFCPDUMP_HSA_SIZE) {
+		TRACE("HSA size too small: %i\n", act_hsa_size);
+		return -EINVAL;
+	}
+	return 0;
+}
+
+static int __init get_mem_size(unsigned long *mem)
+{
+	int i;
+	struct mem_chunk *chunk_array;
+
+	chunk_array = kzalloc(MEMORY_CHUNKS * sizeof(struct mem_chunk),
+			      GFP_KERNEL);
+	if (!chunk_array)
+		return -ENOMEM;
+	detect_memory_layout(chunk_array);
+	for (i = 0; i < MEMORY_CHUNKS; i++) {
+		if (chunk_array[i].size == 0)
+			break;
+		*mem += chunk_array[i].size;
+	}
+	kfree(chunk_array);
+	return 0;
+}
+
+static int __init zcore_header_init(int arch, struct zcore_header *hdr)
+{
+	int rc, i;
+	unsigned long memory = 0;
+	u32 prefix;
+
+	if (arch == ARCH_S390X)
+		hdr->arch_id = DUMP_ARCH_S390X;
+	else
+		hdr->arch_id = DUMP_ARCH_S390;
+	rc = get_mem_size(&memory);
+	if (rc)
+		return rc;
+	hdr->mem_size = memory;
+	hdr->rmem_size = memory;
+	hdr->mem_end = sys_info.mem_size;
+	hdr->num_pages = memory / PAGE_SIZE;
+	hdr->tod = get_clock();
+	get_cpu_id(&hdr->cpu_id);
+	for (i = 0; zfcpdump_save_areas[i]; i++) {
+		prefix = zfcpdump_save_areas[i]->pref_reg;
+		hdr->real_cpu_cnt++;
+		if (!prefix)
+			continue;
+		hdr->lc_vec[hdr->cpu_cnt] = prefix;
+		hdr->cpu_cnt++;
+	}
+	return 0;
+}
+
+/*
+ * Provide IPL parameter information block from either HSA or memory
+ * for future reipl
+ */
+static int __init zcore_reipl_init(void)
+{
+	struct ipib_info ipib_info;
+	int rc;
+
+	rc = memcpy_hsa_kernel(&ipib_info, __LC_DUMP_REIPL, sizeof(ipib_info));
+	if (rc)
+		return rc;
+	if (ipib_info.ipib == 0)
+		return 0;
+	ipl_block = (void *) __get_free_page(GFP_KERNEL);
+	if (!ipl_block)
+		return -ENOMEM;
+	if (ipib_info.ipib < ZFCPDUMP_HSA_SIZE)
+		rc = memcpy_hsa_kernel(ipl_block, ipib_info.ipib, PAGE_SIZE);
+	else
+		rc = memcpy_real(ipl_block, (void *) ipib_info.ipib, PAGE_SIZE);
+	if (rc || csum_partial(ipl_block, ipl_block->hdr.len, 0) !=
+	    ipib_info.checksum) {
+		TRACE("Checksum does not match\n");
+		free_page((unsigned long) ipl_block);
+		ipl_block = NULL;
+	}
+	return 0;
+}
+
+static int __init zcore_init(void)
+{
+	unsigned char arch;
+	int rc;
+
+	if (ipl_info.type != IPL_TYPE_FCP_DUMP)
+		return -ENODATA;
+	if (OLDMEM_BASE)
+		return -ENODATA;
+
+	zcore_dbf = debug_register("zcore", 4, 1, 4 * sizeof(long));
+	debug_register_view(zcore_dbf, &debug_sprintf_view);
+	debug_set_level(zcore_dbf, 6);
+
+	TRACE("devno:  %x\n", ipl_info.data.fcp.dev_id.devno);
+	TRACE("wwpn:   %llx\n", (unsigned long long) ipl_info.data.fcp.wwpn);
+	TRACE("lun:    %llx\n", (unsigned long long) ipl_info.data.fcp.lun);
+
+	rc = sclp_sdias_init();
+	if (rc)
+		goto fail;
+
+	rc = check_sdias();
+	if (rc)
+		goto fail;
+
+	rc = memcpy_hsa_kernel(&arch, __LC_AR_MODE_ID, 1);
+	if (rc)
+		goto fail;
+
+#ifdef CONFIG_64BIT
+	if (arch == ARCH_S390) {
+		pr_alert("The 64-bit dump tool cannot be used for a "
+			 "32-bit system\n");
+		rc = -EINVAL;
+		goto fail;
+	}
+#else /* CONFIG_64BIT */
+	if (arch == ARCH_S390X) {
+		pr_alert("The 32-bit dump tool cannot be used for a "
+			 "64-bit system\n");
+		rc = -EINVAL;
+		goto fail;
+	}
+#endif /* CONFIG_64BIT */
+
+	rc = sys_info_init(arch);
+	if (rc)
+		goto fail;
+
+	rc = zcore_header_init(arch, &zcore_header);
+	if (rc)
+		goto fail;
+
+	rc = zcore_reipl_init();
+	if (rc)
+		goto fail;
+
+	zcore_dir = debugfs_create_dir("zcore" , NULL);
+	if (!zcore_dir) {
+		rc = -ENOMEM;
+		goto fail;
+	}
+	zcore_file = debugfs_create_file("mem", S_IRUSR, zcore_dir, NULL,
+					 &zcore_fops);
+	if (!zcore_file) {
+		rc = -ENOMEM;
+		goto fail_dir;
+	}
+	zcore_memmap_file = debugfs_create_file("memmap", S_IRUSR, zcore_dir,
+						NULL, &zcore_memmap_fops);
+	if (!zcore_memmap_file) {
+		rc = -ENOMEM;
+		goto fail_file;
+	}
+	zcore_reipl_file = debugfs_create_file("reipl", S_IRUSR, zcore_dir,
+						NULL, &zcore_reipl_fops);
+	if (!zcore_reipl_file) {
+		rc = -ENOMEM;
+		goto fail_memmap_file;
+	}
+	hsa_available = 1;
+	return 0;
+
+fail_memmap_file:
+	debugfs_remove(zcore_memmap_file);
+fail_file:
+	debugfs_remove(zcore_file);
+fail_dir:
+	debugfs_remove(zcore_dir);
+fail:
+	diag308(DIAG308_REL_HSA, NULL);
+	return rc;
+}
+
+static void __exit zcore_exit(void)
+{
+	debug_unregister(zcore_dbf);
+	sclp_sdias_exit();
+	free_page((unsigned long) ipl_block);
+	debugfs_remove(zcore_reipl_file);
+	debugfs_remove(zcore_memmap_file);
+	debugfs_remove(zcore_file);
+	debugfs_remove(zcore_dir);
+	diag308(DIAG308_REL_HSA, NULL);
+}
+
+MODULE_AUTHOR("Copyright IBM Corp. 2003,2008");
+MODULE_DESCRIPTION("zcore module for zfcpdump support");
+MODULE_LICENSE("GPL");
+
+subsys_initcall(zcore_init);
+module_exit(zcore_exit);