[mirror_ubuntu-bionic-kernel.git] / drivers / s390 / char / zcore.c

// SPDX-License-Identifier: GPL-1.0+
/*
 * 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/debugfs.h>
#include <linux/memblock.h>

#include <asm/asm-offsets.h>
#include <asm/ipl.h>
#include <asm/sclp.h>
#include <asm/setup.h>
#include <linux/uaccess.h>
#include <asm/debug.h>
#include <asm/processor.h>
#include <asm/irqflags.h>
#include <asm/checksum.h>
#include <asm/os_info.h>
#include <asm/switch_to.h>
#include "sclp.h"

#define TRACE(x...) debug_sprintf_event(zcore_dbf, 1, x)

#define CHUNK_INFO_SIZE	34 /* 2 16-byte char, each followed by blank */

enum arch_id {
	ARCH_S390	= 0,
	ARCH_S390X	= 1,
};

struct ipib_info {
	unsigned long	ipib;
	u32		checksum;
}  __attribute__((packed));

static struct debug_info *zcore_dbf;
static int hsa_available;
static struct dentry *zcore_dir;
static struct dentry *zcore_memmap_file;
static struct dentry *zcore_reipl_file;
static struct dentry *zcore_hsa_file;
static struct ipl_parameter_block *ipl_block;

static char hsa_buf[PAGE_SIZE] __aligned(PAGE_SIZE);

/*
 * Copy memory from HSA to user memory (not reentrant):
 *
 * @dest:  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
 */
int memcpy_hsa_user(void __user *dest, unsigned long src, size_t count)
{
	unsigned long offset, bytes;

	if (!hsa_available)
		return -ENODATA;

	while (count) {
		if (sclp_sdias_copy(hsa_buf, src / PAGE_SIZE + 2, 1)) {
			TRACE("sclp_sdias_copy() failed\n");
			return -EIO;
		}
		offset = src % PAGE_SIZE;
		bytes = min(PAGE_SIZE - offset, count);
		if (copy_to_user(dest, hsa_buf + offset, bytes))
			return -EFAULT;
		src += bytes;
		dest += bytes;
		count -= bytes;
	}
	return 0;
}

/*
 * Copy memory from HSA to kernel 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
 */
int memcpy_hsa_kernel(void *dest, unsigned long src, size_t count)
{
	unsigned long offset, bytes;

	if (!hsa_available)
		return -ENODATA;

	while (count) {
		if (sclp_sdias_copy(hsa_buf, src / PAGE_SIZE + 2, 1)) {
			TRACE("sclp_sdias_copy() failed\n");
			return -EIO;
		}
		offset = src % PAGE_SIZE;
		bytes = min(PAGE_SIZE - offset, count);
		memcpy(dest, hsa_buf + offset, bytes);
		src += bytes;
		dest += bytes;
		count -= bytes;
	}
	return 0;
}

static int __init init_cpu_info(void)
{
	struct save_area *sa;

	/* get info for boot cpu from lowcore, stored in the HSA */
	sa = save_area_boot_cpu();
	if (!sa)
		return -ENOMEM;
	if (memcpy_hsa_kernel(hsa_buf, __LC_FPREGS_SAVE_AREA, 512) < 0) {
		TRACE("could not copy from HSA\n");
		return -EIO;
	}
	save_area_add_regs(sa, hsa_buf); /* vx registers are saved in smp.c */
	return 0;
}

/*
 * Release the HSA
 */
static void release_hsa(void)
{
	diag308(DIAG308_REL_HSA, NULL);
	hsa_available = 0;
}

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,
				       memblock.memory.cnt * CHUNK_INFO_SIZE);
}

static int zcore_memmap_open(struct inode *inode, struct file *filp)
{
	struct memblock_region *reg;
	char *buf;
	int i = 0;

	buf = kzalloc(memblock.memory.cnt * CHUNK_INFO_SIZE, GFP_KERNEL);
	if (!buf) {
		return -ENOMEM;
	}
	for_each_memblock(memory, reg) {
		sprintf(buf + (i++ * CHUNK_INFO_SIZE), "%016llx %016llx ",
			(unsigned long long) reg->base,
			(unsigned long long) reg->size);
	}
	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_LOAD_CLEAR, 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,
};

static ssize_t zcore_hsa_read(struct file *filp, char __user *buf,
			      size_t count, loff_t *ppos)
{
	static char str[18];

	if (hsa_available)
		snprintf(str, sizeof(str), "%lx\n", sclp.hsa_size);
	else
		snprintf(str, sizeof(str), "0\n");
	return simple_read_from_buffer(buf, count, ppos, str, strlen(str));
}

static ssize_t zcore_hsa_write(struct file *filp, const char __user *buf,
			       size_t count, loff_t *ppos)
{
	char value;

	if (*ppos != 0)
		return -EPIPE;
	if (copy_from_user(&value, buf, 1))
		return -EFAULT;
	if (value != '0')
		return -EINVAL;
	release_hsa();
	return count;
}

static const struct file_operations zcore_hsa_fops = {
	.owner		= THIS_MODULE,
	.write		= zcore_hsa_write,
	.read		= zcore_hsa_read,
	.open		= nonseekable_open,
	.llseek		= no_llseek,
};

static int __init check_sdias(void)
{
	if (!sclp.hsa_size) {
		TRACE("Could not determine HSA size\n");
		return -ENODEV;
	}
	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 < sclp.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 || (__force u32)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;
	hsa_available = 1;

	rc = memcpy_hsa_kernel(&arch, __LC_AR_MODE_ID, 1);
	if (rc)
		goto fail;

	if (arch == ARCH_S390) {
		pr_alert("The 64-bit dump tool cannot be used for a "
			 "32-bit system\n");
		rc = -EINVAL;
		goto fail;
	}

	pr_alert("The dump process started for a 64-bit operating system\n");
	rc = init_cpu_info();
	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_memmap_file = debugfs_create_file("memmap", S_IRUSR, zcore_dir,
						NULL, &zcore_memmap_fops);
	if (!zcore_memmap_file) {
		rc = -ENOMEM;
		goto fail_dir;
	}
	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;
	}
	zcore_hsa_file = debugfs_create_file("hsa", S_IRUSR|S_IWUSR, zcore_dir,
					     NULL, &zcore_hsa_fops);
	if (!zcore_hsa_file) {
		rc = -ENOMEM;
		goto fail_reipl_file;
	}
	return 0;

fail_reipl_file:
	debugfs_remove(zcore_reipl_file);
fail_memmap_file:
	debugfs_remove(zcore_memmap_file);
fail_dir:
	debugfs_remove(zcore_dir);
fail:
	diag308(DIAG308_REL_HSA, NULL);
	return rc;
}
subsys_initcall(zcore_init);
Commit	Line	Data
6f05e69e	1	// SPDX-License-Identifier: GPL-1.0+
411ed322 MH	2	/*
	3	* zcore module to export memory content and register sets for creating system
	4	* dumps on SCSI disks (zfcpdump). The "zcore/mem" debugfs file shows the same
	5	* dump format as s390 standalone dumps.
	6	*
	7	* For more information please refer to Documentation/s390/zfcpdump.txt
	8	*
a53c8fab	9	* Copyright IBM Corp. 2003, 2008
411ed322 MH	10	* Author(s): Michael Holzheu
	11	*/
	12
17159dc6 MH	13	#define KMSG_COMPONENT "zdump"
	14	#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
	15
411ed322	16	#include <linux/init.h>
5a0e3ad6	17	#include <linux/slab.h>
411ed322	18	#include <linux/debugfs.h>
50be6345 PH	19	#include <linux/memblock.h>
50be6345 PH	20
cbb870c8	21	#include <asm/asm-offsets.h>
411ed322 MH	22	#include <asm/ipl.h>
	23	#include <asm/sclp.h>
	24	#include <asm/setup.h>
7c0f6ba6	25	#include <linux/uaccess.h>
411ed322 MH	26	#include <asm/debug.h>
	27	#include <asm/processor.h>
	28	#include <asm/irqflags.h>
159d1ff8	29	#include <asm/checksum.h>
bbfed511	30	#include <asm/os_info.h>
a62bc073	31	#include <asm/switch_to.h>
763968e2	32	#include "sclp.h"
411ed322 MH	33
411ed322 MH	34	#define TRACE(x...) debug_sprintf_event(zcore_dbf, 1, x)
411ed322	35
12e0c95e	36	#define CHUNK_INFO_SIZE 34 /* 2 16-byte char, each followed by blank */
411ed322 MH	37
	38	enum arch_id {
	39	ARCH_S390 = 0,
	40	ARCH_S390X = 1,
	41	};
	42
099b7651 FM	43	struct ipib_info {
	44	unsigned long ipib;
	45	u32 checksum;
	46	} __attribute__((packed));
	47
411ed322 MH	48	static struct debug_info *zcore_dbf;
	49	static int hsa_available;
	50	static struct dentry *zcore_dir;
12e0c95e	51	static struct dentry *zcore_memmap_file;
099b7651	52	static struct dentry *zcore_reipl_file;
b4b3d128	53	static struct dentry *zcore_hsa_file;
099b7651	54	static struct ipl_parameter_block *ipl_block;
411ed322	55
019d6bec MS	56	static char hsa_buf[PAGE_SIZE] __aligned(PAGE_SIZE);
019d6bec MS	57
411ed322	58	/*
019d6bec	59	* Copy memory from HSA to user memory (not reentrant):
411ed322	60	*
019d6bec	61	* @dest: User buffer where memory should be copied to
411ed322 MH	62	* @src: Start address within HSA where data should be copied
411ed322 MH	63	* @count: Size of buffer, which should be copied
411ed322	64	*/
019d6bec	65	int memcpy_hsa_user(void __user *dest, unsigned long src, size_t count)
411ed322	66	{
019d6bec	67	unsigned long offset, bytes;
411ed322	68
b4b3d128 MH	69	if (!hsa_available)
b4b3d128 MH	70	return -ENODATA;
411ed322	71
019d6bec MS	72	while (count) {
019d6bec MS	73	if (sclp_sdias_copy(hsa_buf, src / PAGE_SIZE + 2, 1)) {
411ed322 MH	74	TRACE("sclp_sdias_copy() failed\n");
	75	return -EIO;
	76	}
019d6bec MS	77	offset = src % PAGE_SIZE;
	78	bytes = min(PAGE_SIZE - offset, count);
	79	if (copy_to_user(dest, hsa_buf + offset, bytes))
411ed322	80	return -EFAULT;
019d6bec MS	81	src += bytes;
	82	dest += bytes;
	83	count -= bytes;
	84	}
411ed322 MH	85	return 0;
	86	}
	87
df9694c7 MS	88	/*
	89	* Copy memory from HSA to kernel memory (not reentrant):
	90	*
	91	* @dest: Kernel or user buffer where memory should be copied to
	92	* @src: Start address within HSA where data should be copied
	93	* @count: Size of buffer, which should be copied
	94	*/
	95	int memcpy_hsa_kernel(void *dest, unsigned long src, size_t count)
411ed322	96	{
019d6bec MS	97	unsigned long offset, bytes;
	98
	99	if (!hsa_available)
	100	return -ENODATA;
	101
	102	while (count) {
	103	if (sclp_sdias_copy(hsa_buf, src / PAGE_SIZE + 2, 1)) {
	104	TRACE("sclp_sdias_copy() failed\n");
	105	return -EIO;
	106	}
	107	offset = src % PAGE_SIZE;
	108	bytes = min(PAGE_SIZE - offset, count);
	109	memcpy(dest, hsa_buf + offset, bytes);
	110	src += bytes;
	111	dest += bytes;
	112	count -= bytes;
	113	}
	114	return 0;
411ed322 MH	115	}
411ed322 MH	116
ffa52d02	117	static int __init init_cpu_info(void)
411ed322	118	{
1a2c5840	119	struct save_area *sa;
411ed322 MH	120
411ed322 MH	121	/* get info for boot cpu from lowcore, stored in the HSA */
1a2c5840 MS	122	sa = save_area_boot_cpu();
1a2c5840 MS	123	if (!sa)
411ed322	124	return -ENOMEM;
1a2c5840	125	if (memcpy_hsa_kernel(hsa_buf, __LC_FPREGS_SAVE_AREA, 512) < 0) {
2a062ab4	126	TRACE("could not copy from HSA\n");
411ed322 MH	127	return -EIO;
411ed322 MH	128	}
1a2c5840	129	save_area_add_regs(sa, hsa_buf); /* vx registers are saved in smp.c */
411ed322 MH	130	return 0;
	131	}
	132
b4b3d128 MH	133	/*
	134	* Release the HSA
	135	*/
	136	static void release_hsa(void)
	137	{
	138	diag308(DIAG308_REL_HSA, NULL);
	139	hsa_available = 0;
	140	}
	141
12e0c95e FM	142	static ssize_t zcore_memmap_read(struct file filp, char __user buf,
	143	size_t count, loff_t *ppos)
	144	{
	145	return simple_read_from_buffer(buf, count, ppos, filp->private_data,
50be6345	146	memblock.memory.cnt * CHUNK_INFO_SIZE);
12e0c95e FM	147	}
	148
	149	static int zcore_memmap_open(struct inode inode, struct file filp)
	150	{
50be6345	151	struct memblock_region *reg;
12e0c95e	152	char *buf;
50be6345	153	int i = 0;
12e0c95e	154
50be6345	155	buf = kzalloc(memblock.memory.cnt * CHUNK_INFO_SIZE, GFP_KERNEL);
12e0c95e	156	if (!buf) {
12e0c95e FM	157	return -ENOMEM;
12e0c95e FM	158	}
50be6345 PH	159	for_each_memblock(memory, reg) {
	160	sprintf(buf + (i++ * CHUNK_INFO_SIZE), "%016llx %016llx ",
	161	(unsigned long long) reg->base,
	162	(unsigned long long) reg->size);
12e0c95e	163	}
12e0c95e	164	filp->private_data = buf;
58ea91c0	165	return nonseekable_open(inode, filp);
12e0c95e FM	166	}
	167
	168	static int zcore_memmap_release(struct inode inode, struct file filp)
	169	{
	170	kfree(filp->private_data);
	171	return 0;
	172	}
	173
	174	static const struct file_operations zcore_memmap_fops = {
	175	.owner = THIS_MODULE,
	176	.read = zcore_memmap_read,
	177	.open = zcore_memmap_open,
	178	.release = zcore_memmap_release,
6038f373	179	.llseek = no_llseek,
12e0c95e FM	180	};
12e0c95e FM	181
099b7651 FM	182	static ssize_t zcore_reipl_write(struct file filp, const char __user buf,
	183	size_t count, loff_t *ppos)
	184	{
	185	if (ipl_block) {
	186	diag308(DIAG308_SET, ipl_block);
0599eead	187	diag308(DIAG308_LOAD_CLEAR, NULL);
099b7651 FM	188	}
	189	return count;
	190	}
	191
	192	static int zcore_reipl_open(struct inode inode, struct file filp)
	193	{
58ea91c0	194	return nonseekable_open(inode, filp);
099b7651 FM	195	}
	196
	197	static int zcore_reipl_release(struct inode inode, struct file filp)
	198	{
	199	return 0;
	200	}
	201
	202	static const struct file_operations zcore_reipl_fops = {
	203	.owner = THIS_MODULE,
	204	.write = zcore_reipl_write,
	205	.open = zcore_reipl_open,
	206	.release = zcore_reipl_release,
6038f373	207	.llseek = no_llseek,
099b7651 FM	208	};
099b7651 FM	209
b4b3d128 MH	210	static ssize_t zcore_hsa_read(struct file filp, char __user buf,
	211	size_t count, loff_t *ppos)
	212	{
	213	static char str[18];
	214
	215	if (hsa_available)
37c5f6c8	216	snprintf(str, sizeof(str), "%lx\n", sclp.hsa_size);
b4b3d128 MH	217	else
	218	snprintf(str, sizeof(str), "0\n");
	219	return simple_read_from_buffer(buf, count, ppos, str, strlen(str));
	220	}
	221
	222	static ssize_t zcore_hsa_write(struct file filp, const char __user buf,
	223	size_t count, loff_t *ppos)
	224	{
	225	char value;
	226
	227	if (*ppos != 0)
	228	return -EPIPE;
	229	if (copy_from_user(&value, buf, 1))
	230	return -EFAULT;
	231	if (value != '0')
	232	return -EINVAL;
	233	release_hsa();
	234	return count;
	235	}
	236
	237	static const struct file_operations zcore_hsa_fops = {
	238	.owner = THIS_MODULE,
	239	.write = zcore_hsa_write,
	240	.read = zcore_hsa_read,
	241	.open = nonseekable_open,
	242	.llseek = no_llseek,
	243	};
	244
411ed322 MH	245	static int __init check_sdias(void)
411ed322 MH	246	{
37c5f6c8	247	if (!sclp.hsa_size) {
2a062ab4	248	TRACE("Could not determine HSA size\n");
e657d8fe	249	return -ENODEV;
411ed322 MH	250	}
	251	return 0;
	252	}
	253
099b7651 FM	254	/*
	255	* Provide IPL parameter information block from either HSA or memory
	256	* for future reipl
	257	*/
	258	static int __init zcore_reipl_init(void)
	259	{
	260	struct ipib_info ipib_info;
	261	int rc;
	262
	263	rc = memcpy_hsa_kernel(&ipib_info, __LC_DUMP_REIPL, sizeof(ipib_info));
	264	if (rc)
	265	return rc;
	266	if (ipib_info.ipib == 0)
	267	return 0;
	268	ipl_block = (void *) __get_free_page(GFP_KERNEL);
	269	if (!ipl_block)
	270	return -ENOMEM;
37c5f6c8	271	if (ipib_info.ipib < sclp.hsa_size)
099b7651 FM	272	rc = memcpy_hsa_kernel(ipl_block, ipib_info.ipib, PAGE_SIZE);
099b7651 FM	273	else
92fe3132	274	rc = memcpy_real(ipl_block, (void *) ipib_info.ipib, PAGE_SIZE);
90b3baa2	275	if (rc \|\| (__force u32)csum_partial(ipl_block, ipl_block->hdr.len, 0) !=
159d1ff8	276	ipib_info.checksum) {
099b7651 FM	277	TRACE("Checksum does not match\n");
	278	free_page((unsigned long) ipl_block);
	279	ipl_block = NULL;
	280	}
	281	return 0;
	282	}
	283
411ed322 MH	284	static int __init zcore_init(void)
	285	{
	286	unsigned char arch;
	287	int rc;
	288
	289	if (ipl_info.type != IPL_TYPE_FCP_DUMP)
	290	return -ENODATA;
3f25dc4f MH	291	if (OLDMEM_BASE)
3f25dc4f MH	292	return -ENODATA;
411ed322 MH	293
	294	zcore_dbf = debug_register("zcore", 4, 1, 4 * sizeof(long));
	295	debug_register_view(zcore_dbf, &debug_sprintf_view);
	296	debug_set_level(zcore_dbf, 6);
	297
	298	TRACE("devno: %x\n", ipl_info.data.fcp.dev_id.devno);
	299	TRACE("wwpn: %llx\n", (unsigned long long) ipl_info.data.fcp.wwpn);
	300	TRACE("lun: %llx\n", (unsigned long long) ipl_info.data.fcp.lun);
	301
763968e2	302	rc = sclp_sdias_init();
411ed322 MH	303	if (rc)
	304	goto fail;
	305
	306	rc = check_sdias();
2a062ab4	307	if (rc)
411ed322	308	goto fail;
b4b3d128	309	hsa_available = 1;
411ed322 MH	310
411ed322 MH	311	rc = memcpy_hsa_kernel(&arch, __LC_AR_MODE_ID, 1);
2a062ab4	312	if (rc)
411ed322	313	goto fail;
411ed322	314
f64ca217 HC	315	if (arch == ARCH_S390) {
	316	pr_alert("The 64-bit dump tool cannot be used for a "
	317	"32-bit system\n");
	318	rc = -EINVAL;
	319	goto fail;
	320	}
411ed322	321
68962269	322	pr_alert("The dump process started for a 64-bit operating system\n");
ffa52d02	323	rc = init_cpu_info();
2a062ab4	324	if (rc)
411ed322	325	goto fail;
411ed322	326
099b7651 FM	327	rc = zcore_reipl_init();
	328	if (rc)
	329	goto fail;
	330
411ed322 MH	331	zcore_dir = debugfs_create_dir("zcore" , NULL);
	332	if (!zcore_dir) {
	333	rc = -ENOMEM;
	334	goto fail;
	335	}
12e0c95e FM	336	zcore_memmap_file = debugfs_create_file("memmap", S_IRUSR, zcore_dir,
	337	NULL, &zcore_memmap_fops);
	338	if (!zcore_memmap_file) {
	339	rc = -ENOMEM;
ffa52d02	340	goto fail_dir;
411ed322	341	}
099b7651 FM	342	zcore_reipl_file = debugfs_create_file("reipl", S_IRUSR, zcore_dir,
	343	NULL, &zcore_reipl_fops);
	344	if (!zcore_reipl_file) {
	345	rc = -ENOMEM;
	346	goto fail_memmap_file;
	347	}
b4b3d128 MH	348	zcore_hsa_file = debugfs_create_file("hsa", S_IRUSR\|S_IWUSR, zcore_dir,
	349	NULL, &zcore_hsa_fops);
	350	if (!zcore_hsa_file) {
	351	rc = -ENOMEM;
	352	goto fail_reipl_file;
	353	}
411ed322 MH	354	return 0;
411ed322 MH	355
b4b3d128 MH	356	fail_reipl_file:
b4b3d128 MH	357	debugfs_remove(zcore_reipl_file);
099b7651 FM	358	fail_memmap_file:
099b7651 FM	359	debugfs_remove(zcore_memmap_file);
12e0c95e FM	360	fail_dir:
12e0c95e FM	361	debugfs_remove(zcore_dir);
411ed322 MH	362	fail:
	363	diag308(DIAG308_REL_HSA, NULL);
	364	return rc;
	365	}
411ed322	366	subsys_initcall(zcore_init);