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Diffstat (limited to 'arch/s390/kernel/ipl.c')
-rw-r--r--arch/s390/kernel/ipl.c106
1 files changed, 95 insertions, 11 deletions
diff --git a/arch/s390/kernel/ipl.c b/arch/s390/kernel/ipl.c
index 9e9972e8a52b..052259530651 100644
--- a/arch/s390/kernel/ipl.c
+++ b/arch/s390/kernel/ipl.c
@@ -20,26 +20,27 @@
#include <asm/cio.h>
#include <asm/ebcdic.h>
#include <asm/reset.h>
+#include <asm/sclp.h>
#define IPL_PARM_BLOCK_VERSION 0
-#define LOADPARM_LEN 8
-extern char s390_readinfo_sccb[];
-#define SCCB_VALID (*((__u16*)&s390_readinfo_sccb[6]) == 0x0010)
-#define SCCB_LOADPARM (&s390_readinfo_sccb[24])
-#define SCCB_FLAG (s390_readinfo_sccb[91])
+#define SCCB_VALID (s390_readinfo_sccb.header.response_code == 0x10)
+#define SCCB_LOADPARM (&s390_readinfo_sccb.loadparm)
+#define SCCB_FLAG (s390_readinfo_sccb.flags)
enum ipl_type {
IPL_TYPE_NONE = 1,
IPL_TYPE_UNKNOWN = 2,
IPL_TYPE_CCW = 4,
IPL_TYPE_FCP = 8,
+ IPL_TYPE_NSS = 16,
};
#define IPL_NONE_STR "none"
#define IPL_UNKNOWN_STR "unknown"
#define IPL_CCW_STR "ccw"
#define IPL_FCP_STR "fcp"
+#define IPL_NSS_STR "nss"
static char *ipl_type_str(enum ipl_type type)
{
@@ -50,6 +51,8 @@ static char *ipl_type_str(enum ipl_type type)
return IPL_CCW_STR;
case IPL_TYPE_FCP:
return IPL_FCP_STR;
+ case IPL_TYPE_NSS:
+ return IPL_NSS_STR;
case IPL_TYPE_UNKNOWN:
default:
return IPL_UNKNOWN_STR;
@@ -64,6 +67,7 @@ enum ipl_method {
IPL_METHOD_FCP_RO_DIAG,
IPL_METHOD_FCP_RW_DIAG,
IPL_METHOD_FCP_RO_VM,
+ IPL_METHOD_NSS,
};
enum shutdown_action {
@@ -114,11 +118,14 @@ enum diag308_rc {
static int diag308_set_works = 0;
static int reipl_capabilities = IPL_TYPE_UNKNOWN;
+
static enum ipl_type reipl_type = IPL_TYPE_UNKNOWN;
static enum ipl_method reipl_method = IPL_METHOD_NONE;
static struct ipl_parameter_block *reipl_block_fcp;
static struct ipl_parameter_block *reipl_block_ccw;
+static char reipl_nss_name[NSS_NAME_SIZE + 1];
+
static int dump_capabilities = IPL_TYPE_NONE;
static enum ipl_type dump_type = IPL_TYPE_NONE;
static enum ipl_method dump_method = IPL_METHOD_NONE;
@@ -173,6 +180,24 @@ static struct subsys_attribute sys_##_prefix##_##_name##_attr = \
sys_##_prefix##_##_name##_show, \
sys_##_prefix##_##_name##_store);
+#define DEFINE_IPL_ATTR_STR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)\
+static ssize_t sys_##_prefix##_##_name##_show(struct subsystem *subsys, \
+ char *page) \
+{ \
+ return sprintf(page, _fmt_out, _value); \
+} \
+static ssize_t sys_##_prefix##_##_name##_store(struct subsystem *subsys,\
+ const char *buf, size_t len) \
+{ \
+ if (sscanf(buf, _fmt_in, _value) != 1) \
+ return -EINVAL; \
+ return len; \
+} \
+static struct subsys_attribute sys_##_prefix##_##_name##_attr = \
+ __ATTR(_name,(S_IRUGO | S_IWUSR), \
+ sys_##_prefix##_##_name##_show, \
+ sys_##_prefix##_##_name##_store);
+
static void make_attrs_ro(struct attribute **attrs)
{
while (*attrs) {
@@ -189,6 +214,8 @@ static enum ipl_type ipl_get_type(void)
{
struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
+ if (ipl_flags & IPL_NSS_VALID)
+ return IPL_TYPE_NSS;
if (!(ipl_flags & IPL_DEVNO_VALID))
return IPL_TYPE_UNKNOWN;
if (!(ipl_flags & IPL_PARMBLOCK_VALID))
@@ -324,6 +351,20 @@ static struct attribute_group ipl_ccw_attr_group = {
.attrs = ipl_ccw_attrs,
};
+/* NSS ipl device attributes */
+
+DEFINE_IPL_ATTR_RO(ipl_nss, name, "%s\n", kernel_nss_name);
+
+static struct attribute *ipl_nss_attrs[] = {
+ &sys_ipl_type_attr.attr,
+ &sys_ipl_nss_name_attr.attr,
+ NULL,
+};
+
+static struct attribute_group ipl_nss_attr_group = {
+ .attrs = ipl_nss_attrs,
+};
+
/* UNKNOWN ipl device attributes */
static struct attribute *ipl_unknown_attrs[] = {
@@ -432,6 +473,21 @@ static struct attribute_group reipl_ccw_attr_group = {
.attrs = reipl_ccw_attrs,
};
+
+/* NSS reipl device attributes */
+
+DEFINE_IPL_ATTR_STR_RW(reipl_nss, name, "%s\n", "%s\n", reipl_nss_name);
+
+static struct attribute *reipl_nss_attrs[] = {
+ &sys_reipl_nss_name_attr.attr,
+ NULL,
+};
+
+static struct attribute_group reipl_nss_attr_group = {
+ .name = IPL_NSS_STR,
+ .attrs = reipl_nss_attrs,
+};
+
/* reipl type */
static int reipl_set_type(enum ipl_type type)
@@ -454,6 +510,9 @@ static int reipl_set_type(enum ipl_type type)
else
reipl_method = IPL_METHOD_FCP_RO_DIAG;
break;
+ case IPL_TYPE_NSS:
+ reipl_method = IPL_METHOD_NSS;
+ break;
default:
reipl_method = IPL_METHOD_NONE;
}
@@ -475,6 +534,8 @@ static ssize_t reipl_type_store(struct subsystem *subsys, const char *buf,
rc = reipl_set_type(IPL_TYPE_CCW);
else if (strncmp(buf, IPL_FCP_STR, strlen(IPL_FCP_STR)) == 0)
rc = reipl_set_type(IPL_TYPE_FCP);
+ else if (strncmp(buf, IPL_NSS_STR, strlen(IPL_NSS_STR)) == 0)
+ rc = reipl_set_type(IPL_TYPE_NSS);
return (rc != 0) ? rc : len;
}
@@ -647,6 +708,10 @@ void do_reipl(void)
case IPL_METHOD_FCP_RO_VM:
__cpcmd("IPL", NULL, 0, NULL);
break;
+ case IPL_METHOD_NSS:
+ sprintf(buf, "IPL %s", reipl_nss_name);
+ __cpcmd(buf, NULL, 0, NULL);
+ break;
case IPL_METHOD_NONE:
default:
if (MACHINE_IS_VM)
@@ -733,6 +798,10 @@ static int __init ipl_init(void)
case IPL_TYPE_FCP:
rc = ipl_register_fcp_files();
break;
+ case IPL_TYPE_NSS:
+ rc = sysfs_create_group(&ipl_subsys.kset.kobj,
+ &ipl_nss_attr_group);
+ break;
default:
rc = sysfs_create_group(&ipl_subsys.kset.kobj,
&ipl_unknown_attr_group);
@@ -755,6 +824,20 @@ static void __init reipl_probe(void)
free_page((unsigned long)buffer);
}
+static int __init reipl_nss_init(void)
+{
+ int rc;
+
+ if (!MACHINE_IS_VM)
+ return 0;
+ rc = sysfs_create_group(&reipl_subsys.kset.kobj, &reipl_nss_attr_group);
+ if (rc)
+ return rc;
+ strncpy(reipl_nss_name, kernel_nss_name, NSS_NAME_SIZE + 1);
+ reipl_capabilities |= IPL_TYPE_NSS;
+ return 0;
+}
+
static int __init reipl_ccw_init(void)
{
int rc;
@@ -837,6 +920,9 @@ static int __init reipl_init(void)
rc = reipl_fcp_init();
if (rc)
return rc;
+ rc = reipl_nss_init();
+ if (rc)
+ return rc;
rc = reipl_set_type(ipl_get_type());
if (rc)
return rc;
@@ -993,8 +1079,6 @@ static void do_reset_calls(void)
reset->fn();
}
-extern void reset_mcck_handler(void);
-extern void reset_pgm_handler(void);
extern __u32 dump_prefix_page;
void s390_reset_system(void)
@@ -1016,14 +1100,14 @@ void s390_reset_system(void)
__ctl_clear_bit(0,28);
/* Set new machine check handler */
- S390_lowcore.mcck_new_psw.mask = PSW_KERNEL_BITS & ~PSW_MASK_MCHECK;
+ S390_lowcore.mcck_new_psw.mask = psw_kernel_bits & ~PSW_MASK_MCHECK;
S390_lowcore.mcck_new_psw.addr =
- PSW_ADDR_AMODE | (unsigned long) &reset_mcck_handler;
+ PSW_ADDR_AMODE | (unsigned long) s390_base_mcck_handler;
/* Set new program check handler */
- S390_lowcore.program_new_psw.mask = PSW_KERNEL_BITS & ~PSW_MASK_MCHECK;
+ S390_lowcore.program_new_psw.mask = psw_kernel_bits & ~PSW_MASK_MCHECK;
S390_lowcore.program_new_psw.addr =
- PSW_ADDR_AMODE | (unsigned long) &reset_pgm_handler;
+ PSW_ADDR_AMODE | (unsigned long) s390_base_pgm_handler;
do_reset_calls();
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-27 12:25:36 +0100