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s390/ipl: add eckd dump support

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This adds support to use ECKD disks as dump device
to linux. The new dump type is called 'eckd_dump', parameters
are the same as for eckd ipl.

Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Reviewed-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
This commit is contained in:
Sven Schnelle 2022-10-05 10:17:41 +02:00 committed by Alexander Gordeev
parent 87fd22e0ae
commit e2d2a2968f
5 changed files with 81 additions and 1 deletions
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3
arch/s390/boot/ipl_parm.c
View File

@ -77,6 +77,9 @@ bool is_ipl_block_dump(void)
if (ipl_block.pb0_hdr.pbt == IPL_PBT_NVME &&
ipl_block.nvme.opt == IPL_PB0_NVME_OPT_DUMP)
return true;
if (ipl_block.pb0_hdr.pbt == IPL_PBT_ECKD &&
ipl_block.eckd.opt == IPL_PB0_ECKD_OPT_DUMP)
return true;
return false;
}

2
arch/s390/include/asm/ipl.h
View File

@ -74,6 +74,7 @@ enum ipl_type {
IPL_TYPE_NVME = 32,
IPL_TYPE_NVME_DUMP = 64,
IPL_TYPE_ECKD = 128,
IPL_TYPE_ECKD_DUMP = 256,
};
struct ipl_info
@ -108,6 +109,7 @@ extern void set_os_info_reipl_block(void);
static inline bool is_ipl_type_dump(void)
{
return (ipl_info.type == IPL_TYPE_FCP_DUMP) ||
(ipl_info.type == IPL_TYPE_ECKD_DUMP) ||
(ipl_info.type == IPL_TYPE_NVME_DUMP);
}

1
arch/s390/include/uapi/asm/ipl.h
View File

@ -138,6 +138,7 @@ struct ipl_pb0_eckd {
} __packed;
#define IPL_PB0_ECKD_OPT_IPL 0x10
#define IPL_PB0_ECKD_OPT_DUMP 0x20
#define IPL_PB0_CCW_VM_FLAG_NSS 0x80
#define IPL_PB0_CCW_VM_FLAG_VP 0x40

72
arch/s390/kernel/ipl.c
View File

@ -41,6 +41,7 @@
#define IPL_UNKNOWN_STR "unknown"
#define IPL_CCW_STR "ccw"
#define IPL_ECKD_STR "eckd"
#define IPL_ECKD_DUMP_STR "eckd_dump"
#define IPL_FCP_STR "fcp"
#define IPL_FCP_DUMP_STR "fcp_dump"
#define IPL_NVME_STR "nvme"
@ -48,6 +49,7 @@
#define IPL_NSS_STR "nss"
#define DUMP_CCW_STR "ccw"
#define DUMP_ECKD_STR "eckd"
#define DUMP_FCP_STR "fcp"
#define DUMP_NVME_STR "nvme"
#define DUMP_NONE_STR "none"
@ -96,6 +98,8 @@ static char *ipl_type_str(enum ipl_type type)
return IPL_CCW_STR;
case IPL_TYPE_ECKD:
return IPL_ECKD_STR;
case IPL_TYPE_ECKD_DUMP:
return IPL_ECKD_DUMP_STR;
case IPL_TYPE_FCP:
return IPL_FCP_STR;
case IPL_TYPE_FCP_DUMP:
@ -117,6 +121,7 @@ enum dump_type {
DUMP_TYPE_CCW = 2,
DUMP_TYPE_FCP = 4,
DUMP_TYPE_NVME = 8,
DUMP_TYPE_ECKD = 16,
};
static char *dump_type_str(enum dump_type type)
@ -126,6 +131,8 @@ static char *dump_type_str(enum dump_type type)
return DUMP_NONE_STR;
case DUMP_TYPE_CCW:
return DUMP_CCW_STR;
case DUMP_TYPE_ECKD:
return DUMP_ECKD_STR;
case DUMP_TYPE_FCP:
return DUMP_FCP_STR;
case DUMP_TYPE_NVME:
@ -160,6 +167,7 @@ static enum dump_type dump_type = DUMP_TYPE_NONE;
static struct ipl_parameter_block *dump_block_fcp;
static struct ipl_parameter_block *dump_block_nvme;
static struct ipl_parameter_block *dump_block_ccw;
static struct ipl_parameter_block *dump_block_eckd;
static struct sclp_ipl_info sclp_ipl_info;
@ -288,7 +296,10 @@ static __init enum ipl_type get_ipl_type(void)
else
return IPL_TYPE_NVME;
case IPL_PBT_ECKD:
return IPL_TYPE_ECKD;
if (ipl_block.eckd.opt == IPL_PB0_ECKD_OPT_DUMP)
return IPL_TYPE_ECKD_DUMP;
else
return IPL_TYPE_ECKD;
}
return IPL_TYPE_UNKNOWN;
}
@ -343,6 +354,7 @@ static ssize_t sys_ipl_device_show(struct kobject *kobj,
return sprintf(page, "0.%x.%04x\n", ipl_block.ccw.ssid,
ipl_block.ccw.devno);
case IPL_TYPE_ECKD:
case IPL_TYPE_ECKD_DUMP:
return sprintf(page, "0.%x.%04x\n", ipl_block.eckd.ssid,
ipl_block.eckd.devno);
case IPL_TYPE_FCP:
@ -1368,6 +1380,7 @@ static void __reipl_run(void *unused)
break;
case IPL_TYPE_FCP_DUMP:
case IPL_TYPE_NVME_DUMP:
case IPL_TYPE_ECKD_DUMP:
break;
}
disabled_wait();
@ -1736,6 +1749,31 @@ static struct attribute_group dump_nvme_attr_group = {
.attrs = dump_nvme_attrs,
};
/* ECKD dump device attributes */
DEFINE_IPL_CCW_ATTR_RW(dump_eckd, device, dump_block_eckd->eckd);
DEFINE_IPL_ATTR_RW(dump_eckd, bootprog, "%lld\n", "%llx\n",
dump_block_eckd->eckd.bootprog);
IPL_ATTR_BR_CHR_SHOW_FN(dump, dump_block_eckd->eckd);
IPL_ATTR_BR_CHR_STORE_FN(dump, dump_block_eckd->eckd);
static struct kobj_attribute sys_dump_eckd_br_chr_attr =
__ATTR(br_chr, (S_IRUGO | S_IWUSR),
eckd_dump_br_chr_show,
eckd_dump_br_chr_store);
static struct attribute *dump_eckd_attrs[] = {
&sys_dump_eckd_device_attr.attr,
&sys_dump_eckd_bootprog_attr.attr,
&sys_dump_eckd_br_chr_attr.attr,
NULL,
};
static struct attribute_group dump_eckd_attr_group = {
.name = IPL_ECKD_STR,
.attrs = dump_eckd_attrs,
};
/* CCW dump device attributes */
DEFINE_IPL_CCW_ATTR_RW(dump_ccw, device, dump_block_ccw->ccw);
@ -1775,6 +1813,8 @@ static ssize_t dump_type_store(struct kobject *kobj,
rc = dump_set_type(DUMP_TYPE_NONE);
else if (strncmp(buf, DUMP_CCW_STR, strlen(DUMP_CCW_STR)) == 0)
rc = dump_set_type(DUMP_TYPE_CCW);
else if (strncmp(buf, DUMP_ECKD_STR, strlen(DUMP_ECKD_STR)) == 0)
rc = dump_set_type(DUMP_TYPE_ECKD);
else if (strncmp(buf, DUMP_FCP_STR, strlen(DUMP_FCP_STR)) == 0)
rc = dump_set_type(DUMP_TYPE_FCP);
else if (strncmp(buf, DUMP_NVME_STR, strlen(DUMP_NVME_STR)) == 0)
@ -1803,6 +1843,9 @@ static void __dump_run(void *unused)
case DUMP_TYPE_CCW:
diag308_dump(dump_block_ccw);
break;
case DUMP_TYPE_ECKD:
diag308_dump(dump_block_eckd);
break;
case DUMP_TYPE_FCP:
diag308_dump(dump_block_fcp);
break;
@ -1888,6 +1931,29 @@ static int __init dump_nvme_init(void)
return 0;
}
static int __init dump_eckd_init(void)
{
int rc;
if (!sclp_ipl_info.has_dump || !sclp.has_sipl_eckd)
return 0; /* LDIPL DUMP is not installed */
dump_block_eckd = (void *)get_zeroed_page(GFP_KERNEL);
if (!dump_block_eckd)
return -ENOMEM;
rc = sysfs_create_group(&dump_kset->kobj, &dump_eckd_attr_group);
if (rc) {
free_page((unsigned long)dump_block_eckd);
return rc;
}
dump_block_eckd->hdr.len = IPL_BP_ECKD_LEN;
dump_block_eckd->hdr.version = IPL_PARM_BLOCK_VERSION;
dump_block_eckd->eckd.len = IPL_BP0_ECKD_LEN;
dump_block_eckd->eckd.pbt = IPL_PBT_ECKD;
dump_block_eckd->eckd.opt = IPL_PB0_ECKD_OPT_DUMP;
dump_capabilities |= DUMP_TYPE_ECKD;
return 0;
}
static int __init dump_init(void)
{
int rc;
@ -1901,6 +1967,9 @@ static int __init dump_init(void)
return rc;
}
rc = dump_ccw_init();
if (rc)
return rc;
rc = dump_eckd_init();
if (rc)
return rc;
rc = dump_fcp_init();
@ -2337,6 +2406,7 @@ void __init setup_ipl(void)
ipl_info.data.ccw.dev_id.devno = ipl_block.ccw.devno;
break;
case IPL_TYPE_ECKD:
case IPL_TYPE_ECKD_DUMP:
ipl_info.data.eckd.dev_id.ssid = ipl_block.eckd.ssid;
ipl_info.data.eckd.dev_id.devno = ipl_block.eckd.devno;
break;

4
drivers/s390/char/zcore.c
View File

@ -282,6 +282,10 @@ static int __init zcore_init(void)
TRACE("type: nvme\n");
TRACE("fid: %x\n", ipl_info.data.nvme.fid);
TRACE("nsid: %x\n", ipl_info.data.nvme.nsid);
} else if (ipl_info.type == IPL_TYPE_ECKD_DUMP) {
TRACE("type: eckd\n");
TRACE("devno: %x\n", ipl_info.data.eckd.dev_id.devno);
TRACE("ssid: %x\n", ipl_info.data.eckd.dev_id.ssid);
}
rc = sclp_sdias_init();