1 files changed, 183 insertions, 224 deletions

diff --git a/drivers/s390/char/zcore.c b/drivers/s390/char/zcore.c
index 82daa3c1dc9..1884653e447 100644
--- a/drivers/s390/char/zcore.c
+++ b/drivers/s390/char/zcore.c
@@ -5,7 +5,7 @@
  *
  * For more information please refer to Documentation/s390/zfcpdump.txt
  *
- * Copyright IBM Corp. 2003,2008
+ * Copyright IBM Corp. 2003, 2008
  * Author(s): Michael Holzheu
  */
 
@@ -13,12 +13,16 @@
 #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 <linux/memblock.h>
+
+#include <asm/asm-offsets.h>
 #include <asm/ipl.h>
 #include <asm/sclp.h>
 #include <asm/setup.h>
-#include <asm/sigp.h>
 #include <asm/uaccess.h>
 #include <asm/debug.h>
 #include <asm/processor.h>
@@ -28,8 +32,8 @@
 
 #define TRACE(x...) debug_sprintf_event(zcore_dbf, 1, x)
 
-#define TO_USER		0
-#define TO_KERNEL	1
+#define TO_USER		1
+#define TO_KERNEL	0
 #define CHUNK_INFO_SIZE	34 /* 2 16-byte char, each followed by blank */
 
 enum arch_id {
@@ -40,12 +44,12 @@ enum arch_id {
 /* 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;
-	union save_area	lc_mask;
+	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 {
@@ -60,6 +64,7 @@ static struct dentry *zcore_dir;
 static struct dentry *zcore_file;
 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;
 
 /*
@@ -70,11 +75,13 @@ static struct ipl_parameter_block *ipl_block;
  * @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 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 (!hsa_available)
+		return -ENODATA;
 	if (count == 0)
 		return 0;
 
@@ -122,7 +129,7 @@ static int memcpy_hsa(void *dest, unsigned long src, size_t count, int mode)
 	}
 	if (mode == TO_USER) {
 		if (copy_to_user((__force __user void*) dest + offs, buf,
-				 PAGE_SIZE))
+				 count - offs))
 			return -EFAULT;
 	} else
 		memcpy(dest + offs, buf, count - offs);
@@ -140,99 +147,13 @@ static int memcpy_hsa_kernel(void *dest, unsigned long src, size_t count)
 	return memcpy_hsa(dest, src, count, TO_KERNEL);
 }
 
-static int memcpy_real(void *dest, unsigned long src, size_t count)
-{
-	unsigned long flags;
-	int rc = -EFAULT;
-	register unsigned long _dest asm("2") = (unsigned long) dest;
-	register unsigned long _len1 asm("3") = (unsigned long) count;
-	register unsigned long _src  asm("4") = src;
-	register unsigned long _len2 asm("5") = (unsigned long) count;
-
-	if (count == 0)
-		return 0;
-	flags = __raw_local_irq_stnsm(0xf8UL); /* switch to real mode */
-	asm volatile (
-		"0:	mvcle	%1,%2,0x0\n"
-		"1:	jo	0b\n"
-		"	lhi	%0,0x0\n"
-		"2:\n"
-		EX_TABLE(1b,2b)
-		: "+d" (rc), "+d" (_dest), "+d" (_src), "+d" (_len1),
-		  "+d" (_len2), "=m" (*((long*)dest))
-		: "m" (*((long*)src))
-		: "cc", "memory");
-	__raw_local_irq_ssm(flags);
-
-	return rc;
-}
-
-static int memcpy_real_user(void __user *dest, unsigned long src, size_t count)
-{
-	static char buf[4096];
-	int offs = 0, size;
-
-	while (offs < count) {
-		size = min(sizeof(buf), count - offs);
-		if (memcpy_real(buf, src + offs, size))
-			return -EFAULT;
-		if (copy_to_user(dest + offs, buf, size))
-			return -EFAULT;
-		offs += size;
-	}
-	return 0;
-}
-
-#ifdef __s390x__
-/*
- * Convert s390x (64 bit) cpu info to s390 (32 bit) cpu info
- */
-static void __init s390x_to_s390_regs(union save_area *out, union save_area *in,
-				      int cpu)
-{
-	int i;
-
-	for (i = 0; i < 16; i++) {
-		out->s390.gp_regs[i] = in->s390x.gp_regs[i] & 0x00000000ffffffff;
-		out->s390.acc_regs[i] = in->s390x.acc_regs[i];
-		out->s390.ctrl_regs[i] =
-			in->s390x.ctrl_regs[i] & 0x00000000ffffffff;
-	}
-	/* locore for 31 bit has only space for fpregs 0,2,4,6 */
-	out->s390.fp_regs[0] = in->s390x.fp_regs[0];
-	out->s390.fp_regs[1] = in->s390x.fp_regs[2];
-	out->s390.fp_regs[2] = in->s390x.fp_regs[4];
-	out->s390.fp_regs[3] = in->s390x.fp_regs[6];
-	memcpy(&(out->s390.psw[0]), &(in->s390x.psw[0]), 4);
-	out->s390.psw[1] |= 0x8; /* set bit 12 */
-	memcpy(&(out->s390.psw[4]),&(in->s390x.psw[12]), 4);
-	out->s390.psw[4] |= 0x80; /* set (31bit) addressing bit */
-	out->s390.pref_reg = in->s390x.pref_reg;
-	out->s390.timer = in->s390x.timer;
-	out->s390.clk_cmp = in->s390x.clk_cmp;
-}
-
-static void __init s390x_to_s390_save_areas(void)
-{
-	int i = 1;
-	static union save_area tmp;
-
-	while (zfcpdump_save_areas[i]) {
-		s390x_to_s390_regs(&tmp, zfcpdump_save_areas[i], i);
-		memcpy(zfcpdump_save_areas[i], &tmp, sizeof(tmp));
-		i++;
-	}
-}
-
-#endif /* __s390x__ */
-
 static int __init init_cpu_info(enum arch_id arch)
 {
-	union save_area *sa;
+	struct save_area *sa;
 
 	/* get info for boot cpu from lowcore, stored in the HSA */
 
-	sa = kmalloc(sizeof(*sa), GFP_KERNEL);
+	sa = dump_save_area_create(0);
 	if (!sa)
 		return -ENOMEM;
 	if (memcpy_hsa_kernel(sa, sys_info.sa_base, sys_info.sa_size) < 0) {
@@ -240,21 +161,12 @@ static int __init init_cpu_info(enum arch_id arch)
 		kfree(sa);
 		return -EIO;
 	}
-	zfcpdump_save_areas[0] = sa;
-
-#ifdef __s390x__
-	/* convert s390x regs to s390, if we are dumping an s390 Linux */
-
-	if (arch == ARCH_S390)
-		s390x_to_s390_save_areas();
-#endif
-
 	return 0;
 }
 
 static DEFINE_MUTEX(zcore_mutex);
 
-#define DUMP_VERSION	0x3
+#define DUMP_VERSION	0x5
 #define DUMP_MAGIC	0xa8190173618f23fdULL
 #define DUMP_ARCH_S390X	2
 #define DUMP_ARCH_S390	1
@@ -279,7 +191,14 @@ struct zcore_header {
 	u32 volnr;
 	u32 build_arch;
 	u64 rmem_size;
-	char pad2[4016];
+	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 = {
@@ -289,7 +208,7 @@ static struct zcore_header zcore_header = {
 	.dump_level	= 0,
 	.page_size	= PAGE_SIZE,
 	.mem_start	= 0,
-#ifdef __s390x__
+#ifdef CONFIG_64BIT
 	.build_arch	= DUMP_ARCH_S390X,
 #else
 	.build_arch	= DUMP_ARCH_S390,
@@ -328,28 +247,25 @@ static int copy_lc(void __user *buf, void *sa, int sa_off, int len)
 static int zcore_add_lc(char __user *buf, unsigned long start, size_t count)
 {
 	unsigned long end;
-	int i = 0;
+	int i;
 
 	if (count == 0)
 		return 0;
 
 	end = start + count;
-	while (zfcpdump_save_areas[i]) {
+	for (i = 0; i < dump_save_areas.count; 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;
+		struct save_area *save_area = dump_save_areas.areas[i];
 
-		if (sys_info.arch == ARCH_S390)
-			prefix = zfcpdump_save_areas[i]->s390.pref_reg;
-		else
-			prefix = zfcpdump_save_areas[i]->s390x.pref_reg;
-
+		prefix = save_area->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;
+			continue;
 		cp_start = max(start, sa_start);
 		cp_end = min(end, sa_end);
 
@@ -358,15 +274,22 @@ static int zcore_add_lc(char __user *buf, unsigned long start, size_t count)
 		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))
+		if (copy_lc(buf + buf_off, save_area, sa_off, len))
 			return -EFAULT;
-next:
-		i++;
 	}
 	return 0;
 }
 
 /*
+ * Release the HSA
+ */
+static void release_hsa(void)
+{
+	diag308(DIAG308_REL_HSA, NULL);
+	hsa_available = 0;
+}
+
+/*
  * Read routine for zcore character device
  * First 4K are dump header
  * Next 32MB are HSA Memory
@@ -407,9 +330,9 @@ static ssize_t zcore_read(struct file *file, char __user *buf, size_t count,
 	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));
+	if (*ppos < sclp_get_hsa_size() + HEADER_SIZE) {
+		size = min((count - hdr_count),
+			   (size_t) (sclp_get_hsa_size() - mem_start));
 		rc = memcpy_hsa_user(buf + hdr_count, mem_start, size);
 		if (rc)
 			goto fail;
@@ -419,8 +342,8 @@ static ssize_t zcore_read(struct file *file, char __user *buf, size_t count,
 
 	/* Copy from real mem */
 	size = count - mem_offs - hdr_count;
-	rc = memcpy_real_user(buf + hdr_count + mem_offs, mem_start + mem_offs,
-			      size);
+	rc = copy_to_user_real(buf + hdr_count + mem_offs,
+			       (void *) mem_start + mem_offs, size);
 	if (rc)
 		goto fail;
 
@@ -452,8 +375,8 @@ static int zcore_open(struct inode *inode, struct file *filp)
 
 static int zcore_release(struct inode *inode, struct file *filep)
 {
-	diag308(DIAG308_REL_HSA, NULL);
-	hsa_available = 0;
+	if (hsa_available)
+		release_hsa();
 	return 0;
 }
 
@@ -490,35 +413,26 @@ 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);
+				       memblock.memory.cnt * CHUNK_INFO_SIZE);
 }
 
 static int zcore_memmap_open(struct inode *inode, struct file *filp)
 {
-	int i;
+	struct memblock_region *reg;
 	char *buf;
-	struct mem_chunk *chunk_array;
+	int i = 0;
 
-	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);
+	buf = kzalloc(memblock.memory.cnt * 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;
+	for_each_memblock(memory, reg) {
+		sprintf(buf + (i++ * CHUNK_INFO_SIZE), "%016llx %016llx ",
+			(unsigned long long) reg->base,
+			(unsigned long long) reg->size);
 	}
-	kfree(chunk_array);
 	filp->private_data = buf;
-	return 0;
+	return nonseekable_open(inode, filp);
 }
 
 static int zcore_memmap_release(struct inode *inode, struct file *filp)
@@ -532,6 +446,7 @@ static const struct file_operations zcore_memmap_fops = {
 	.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,
@@ -546,7 +461,7 @@ static ssize_t zcore_reipl_write(struct file *filp, const char __user *buf,
 
 static int zcore_reipl_open(struct inode *inode, struct file *filp)
 {
-	return 0;
+	return nonseekable_open(inode, filp);
 }
 
 static int zcore_reipl_release(struct inode *inode, struct file *filp)
@@ -559,124 +474,151 @@ static const struct file_operations zcore_reipl_fops = {
 	.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_get_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,
 };
 
+#ifdef CONFIG_32BIT
 
-static void __init set_s390_lc_mask(union save_area *map)
+static void __init set_lc_mask(struct save_area *map)
 {
-	memset(&map->s390.ext_save, 0xff, sizeof(map->s390.ext_save));
-	memset(&map->s390.timer, 0xff, sizeof(map->s390.timer));
-	memset(&map->s390.clk_cmp, 0xff, sizeof(map->s390.clk_cmp));
-	memset(&map->s390.psw, 0xff, sizeof(map->s390.psw));
-	memset(&map->s390.pref_reg, 0xff, sizeof(map->s390.pref_reg));
-	memset(&map->s390.acc_regs, 0xff, sizeof(map->s390.acc_regs));
-	memset(&map->s390.fp_regs, 0xff, sizeof(map->s390.fp_regs));
-	memset(&map->s390.gp_regs, 0xff, sizeof(map->s390.gp_regs));
-	memset(&map->s390.ctrl_regs, 0xff, sizeof(map->s390.ctrl_regs));
+	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));
 }
 
-static void __init set_s390x_lc_mask(union save_area *map)
+#else /* CONFIG_32BIT */
+
+static void __init set_lc_mask(struct save_area *map)
 {
-	memset(&map->s390x.fp_regs, 0xff, sizeof(map->s390x.fp_regs));
-	memset(&map->s390x.gp_regs, 0xff, sizeof(map->s390x.gp_regs));
-	memset(&map->s390x.psw, 0xff, sizeof(map->s390x.psw));
-	memset(&map->s390x.pref_reg, 0xff, sizeof(map->s390x.pref_reg));
-	memset(&map->s390x.fp_ctrl_reg, 0xff, sizeof(map->s390x.fp_ctrl_reg));
-	memset(&map->s390x.tod_reg, 0xff, sizeof(map->s390x.tod_reg));
-	memset(&map->s390x.timer, 0xff, sizeof(map->s390x.timer));
-	memset(&map->s390x.clk_cmp, 0xff, sizeof(map->s390x.clk_cmp));
-	memset(&map->s390x.acc_regs, 0xff, sizeof(map->s390x.acc_regs));
-	memset(&map->s390x.ctrl_regs, 0xff, sizeof(map->s390x.ctrl_regs));
+	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)
+static int __init sys_info_init(enum arch_id arch, unsigned long mem_end)
 {
 	int rc;
 
 	switch (arch) {
 	case ARCH_S390X:
 		pr_alert("DETECTED 'S390X (64 bit) OS'\n");
-		sys_info.sa_base = SAVE_AREA_BASE_S390X;
-		sys_info.sa_size = sizeof(struct save_area_s390x);
-		set_s390x_lc_mask(&sys_info.lc_mask);
 		break;
 	case ARCH_S390:
 		pr_alert("DETECTED 'S390 (32 bit) OS'\n");
-		sys_info.sa_base = SAVE_AREA_BASE_S390;
-		sys_info.sa_size = sizeof(struct save_area_s390);
-		set_s390_lc_mask(&sys_info.lc_mask);
 		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;
+	sys_info.mem_size = mem_end;
 
 	return 0;
 }
 
 static int __init check_sdias(void)
 {
-	int rc, act_hsa_size;
-
-	rc = sclp_sdias_blk_count();
-	if (rc < 0) {
+	if (!sclp_get_hsa_size()) {
 		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 -ENODEV;
 	}
 	return 0;
 }
 
-static int __init get_mem_size(unsigned long *mem)
+static int __init get_mem_info(unsigned long *mem, unsigned long *end)
 {
-	int i;
-	struct mem_chunk *chunk_array;
+	struct memblock_region *reg;
 
-	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;
+	for_each_memblock(memory, reg) {
+		*mem += reg->size;
+		*end = max_t(unsigned long, *end, reg->base + reg->size);
 	}
-	kfree(chunk_array);
 	return 0;
 }
 
-static int __init zcore_header_init(int arch, struct zcore_header *hdr)
+static void __init zcore_header_init(int arch, struct zcore_header *hdr,
+				     unsigned long mem_size)
 {
-	int rc;
-	unsigned long memory = 0;
+	u32 prefix;
+	int i;
 
 	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_size = mem_size;
+	hdr->rmem_size = mem_size;
 	hdr->mem_end = sys_info.mem_size;
-	hdr->num_pages = memory / PAGE_SIZE;
-	hdr->tod = get_clock();
+	hdr->num_pages = mem_size / PAGE_SIZE;
+	hdr->tod = get_tod_clock();
 	get_cpu_id(&hdr->cpu_id);
-	return 0;
+	for (i = 0; i < dump_save_areas.count; i++) {
+		prefix = dump_save_areas.areas[i]->pref_reg;
+		hdr->real_cpu_cnt++;
+		if (!prefix)
+			continue;
+		hdr->lc_vec[hdr->cpu_cnt] = prefix;
+		hdr->cpu_cnt++;
+	}
 }
 
 /*
@@ -696,15 +638,11 @@ static int __init zcore_reipl_init(void)
 	ipl_block = (void *) __get_free_page(GFP_KERNEL);
 	if (!ipl_block)
 		return -ENOMEM;
-	if (ipib_info.ipib < ZFCPDUMP_HSA_SIZE)
+	if (ipib_info.ipib < sclp_get_hsa_size())
 		rc = memcpy_hsa_kernel(ipl_block, ipib_info.ipib, PAGE_SIZE);
 	else
-		rc = memcpy_real(ipl_block, ipib_info.ipib, PAGE_SIZE);
-	if (rc) {
-		free_page((unsigned long) ipl_block);
-		return rc;
-	}
-	if (csum_partial(ipl_block, ipl_block->hdr.len, 0) !=
+		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);
@@ -715,11 +653,15 @@ static int __init zcore_reipl_init(void)
 
 static int __init zcore_init(void)
 {
+	unsigned long mem_size, mem_end;
 	unsigned char arch;
 	int rc;
 
+	mem_size = mem_end = 0;
 	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);
@@ -736,27 +678,36 @@ static int __init zcore_init(void)
 	rc = check_sdias();
 	if (rc)
 		goto fail;
+	hsa_available = 1;
 
 	rc = memcpy_hsa_kernel(&arch, __LC_AR_MODE_ID, 1);
 	if (rc)
 		goto fail;
 
-#ifndef __s390x__
+#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
+#endif /* CONFIG_64BIT */
 
-	rc = sys_info_init(arch);
+	rc = get_mem_info(&mem_size, &mem_end);
 	if (rc)
 		goto fail;
 
-	rc = zcore_header_init(arch, &zcore_header);
+	rc = sys_info_init(arch, mem_end);
 	if (rc)
 		goto fail;
+	zcore_header_init(arch, &zcore_header, mem_size);
 
 	rc = zcore_reipl_init();
 	if (rc)
@@ -785,9 +736,16 @@ static int __init zcore_init(void)
 		rc = -ENOMEM;
 		goto fail_memmap_file;
 	}
-	hsa_available = 1;
+	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_file:
@@ -804,6 +762,7 @@ static void __exit zcore_exit(void)
 	debug_unregister(zcore_dbf);
 	sclp_sdias_exit();
 	free_page((unsigned long) ipl_block);
+	debugfs_remove(zcore_hsa_file);
 	debugfs_remove(zcore_reipl_file);
 	debugfs_remove(zcore_memmap_file);
 	debugfs_remove(zcore_file);