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path: root/drivers/s390/char/zcore.c
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Diffstat (limited to 'drivers/s390/char/zcore.c')
-rw-r--r--drivers/s390/char/zcore.c163
1 files changed, 67 insertions, 96 deletions
diff --git a/drivers/s390/char/zcore.c b/drivers/s390/char/zcore.c
index 82daa3c1dc9..3438658b66b 100644
--- a/drivers/s390/char/zcore.c
+++ b/drivers/s390/char/zcore.c
@@ -15,6 +15,7 @@
#include <linux/init.h>
#include <linux/miscdevice.h>
#include <linux/debugfs.h>
+#include <asm/asm-offsets.h>
#include <asm/ipl.h>
#include <asm/sclp.h>
#include <asm/setup.h>
@@ -40,12 +41,12 @@ 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 +184,9 @@ 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 */
@@ -241,20 +199,12 @@ 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;
}
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 +229,14 @@ 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 +246,7 @@ 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 +297,7 @@ 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 +514,39 @@ 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 +557,18 @@ 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;
@@ -660,8 +615,9 @@ static int __init get_mem_size(unsigned long *mem)
static int __init zcore_header_init(int arch, struct zcore_header *hdr)
{
- int rc;
+ int rc, i;
unsigned long memory = 0;
+ u32 prefix;
if (arch == ARCH_S390X)
hdr->arch_id = DUMP_ARCH_S390X;
@@ -676,6 +632,14 @@ static int __init zcore_header_init(int arch, struct zcore_header *hdr)
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;
}
@@ -741,14 +705,21 @@ 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)