| /* |
| * 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 dentry *zcore_hsa_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 (!hsa_available) |
| return -ENODATA; |
| 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; |
| } |
| |
| /* |
| * 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 |
| * 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) |
| { |
| if (hsa_available) |
| release_hsa(); |
| 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, |
| }; |
| |
| 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", ZFCPDUMP_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_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; |
| hsa_available = 1; |
| |
| 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; |
| } |
| 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: |
| 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_hsa_file); |
| 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); |