diff options
Diffstat (limited to 'drivers/s390')
| -rw-r--r-- | drivers/s390/char/zcore.c | 140 |
1 files changed, 47 insertions, 93 deletions
diff --git a/drivers/s390/char/zcore.c b/drivers/s390/char/zcore.c index 82daa3c1dc9c..1d935b2c9bf4 100644 --- a/drivers/s390/char/zcore.c +++ b/drivers/s390/char/zcore.c @@ -40,12 +40,12 @@ 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 { @@ -183,52 +183,9 @@ static int memcpy_real_user(void __user *dest, unsigned long src, size_t count) 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 */ @@ -241,14 +198,6 @@ static int __init init_cpu_info(enum arch_id arch) 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; } @@ -289,7 +238,7 @@ 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, @@ -340,11 +289,7 @@ static int zcore_add_lc(char __user *buf, unsigned long start, size_t count) unsigned long prefix; unsigned long sa_off, len, buf_off; - if (sys_info.arch == ARCH_S390) - prefix = zfcpdump_save_areas[i]->s390.pref_reg; - else - prefix = zfcpdump_save_areas[i]->s390x.pref_reg; - + 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; @@ -561,34 +506,39 @@ static const struct file_operations zcore_reipl_fops = { .release = zcore_reipl_release, }; +#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 */ @@ -599,21 +549,18 @@ static int __init sys_info_init(enum arch_id arch) 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; @@ -741,14 +688,21 @@ static int __init zcore_init(void) 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); if (rc) |