[S390] ipl/dump on panic.

It is now possible to specify a ccw/fcp dump device which is used to
automatically create a system dump in case of a kernel panic. The dump
device can be configured under /sys/firmware/dump.
In addition it is now possible to specify a ccw/fcp device which is used
for the next reboot of Linux. The reipl device can be configured under
/sys/firmware/reipl.

Signed-off-by: Michael Holzheu <holzheu@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

1 files changed, 1 insertions, 219 deletions

diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c
index 89051e8a5d8d..f2a9165ca4f8 100644
--- a/arch/s390/kernel/setup.c
+++ b/arch/s390/kernel/setup.c
@@ -285,16 +285,9 @@ void (*_machine_power_off)(void) = machine_power_off_smp;
 /*
  * Reboot, halt and power_off routines for non SMP.
  */
-extern void reipl(unsigned long devno);
-extern void reipl_diag(void);
 static void do_machine_restart_nonsmp(char * __unused)
 {
-        reipl_diag();
-
-        if (MACHINE_IS_VM)
-                cpcmd ("IPL", NULL, 0, NULL);
-        else
-                reipl (0x10000 | S390_lowcore.ipl_device);
+        do_reipl();
 }
 
 static void do_machine_halt_nonsmp(void)
@@ -755,214 +748,3 @@ struct seq_operations cpuinfo_op = {
         .show   = show_cpuinfo,
 };
 
-#define DEFINE_IPL_ATTR(_name, _format, _value)                 \
-static ssize_t ipl_##_name##_show(struct subsystem *subsys,     \
-                char *page)                                     \
-{                                                               \
-        return sprintf(page, _format, _value);                  \
-}                                                               \
-static struct subsys_attribute ipl_##_name##_attr =             \
-        __ATTR(_name, S_IRUGO, ipl_##_name##_show, NULL);
-
-DEFINE_IPL_ATTR(wwpn, "0x%016llx\n", (unsigned long long)
-                IPL_PARMBLOCK_START->fcp.wwpn);
-DEFINE_IPL_ATTR(lun, "0x%016llx\n", (unsigned long long)
-                IPL_PARMBLOCK_START->fcp.lun);
-DEFINE_IPL_ATTR(bootprog, "%lld\n", (unsigned long long)
-                IPL_PARMBLOCK_START->fcp.bootprog);
-DEFINE_IPL_ATTR(br_lba, "%lld\n", (unsigned long long)
-                IPL_PARMBLOCK_START->fcp.br_lba);
-
-enum ipl_type_type {
-        ipl_type_unknown,
-        ipl_type_ccw,
-        ipl_type_fcp,
-};
-
-static enum ipl_type_type
-get_ipl_type(void)
-{
-        struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
-
-        if (!IPL_DEVNO_VALID)
-                return ipl_type_unknown;
-        if (!IPL_PARMBLOCK_VALID)
-                return ipl_type_ccw;
-        if (ipl->hdr.header.version > IPL_MAX_SUPPORTED_VERSION)
-                return ipl_type_unknown;
-        if (ipl->fcp.pbt != IPL_TYPE_FCP)
-                return ipl_type_unknown;
-        return ipl_type_fcp;
-}
-
-static ssize_t
-ipl_type_show(struct subsystem *subsys, char *page)
-{
-        switch (get_ipl_type()) {
-        case ipl_type_ccw:
-                return sprintf(page, "ccw\n");
-        case ipl_type_fcp:
-                return sprintf(page, "fcp\n");
-        default:
-                return sprintf(page, "unknown\n");
-        }
-}
-
-static struct subsys_attribute ipl_type_attr = __ATTR_RO(ipl_type);
-
-static ssize_t
-ipl_device_show(struct subsystem *subsys, char *page)
-{
-        struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
-
-        switch (get_ipl_type()) {
-        case ipl_type_ccw:
-                return sprintf(page, "0.0.%04x\n", ipl_devno);
-        case ipl_type_fcp:
-                return sprintf(page, "0.0.%04x\n", ipl->fcp.devno);
-        default:
-                return 0;
-        }
-}
-
-static struct subsys_attribute ipl_device_attr =
-        __ATTR(device, S_IRUGO, ipl_device_show, NULL);
-
-static struct attribute *ipl_fcp_attrs[] = {
-        &ipl_type_attr.attr,
-        &ipl_device_attr.attr,
-        &ipl_wwpn_attr.attr,
-        &ipl_lun_attr.attr,
-        &ipl_bootprog_attr.attr,
-        &ipl_br_lba_attr.attr,
-        NULL,
-};
-
-static struct attribute_group ipl_fcp_attr_group = {
-        .attrs = ipl_fcp_attrs,
-};
-
-static struct attribute *ipl_ccw_attrs[] = {
-        &ipl_type_attr.attr,
-        &ipl_device_attr.attr,
-        NULL,
-};
-
-static struct attribute_group ipl_ccw_attr_group = {
-        .attrs = ipl_ccw_attrs,
-};
-
-static struct attribute *ipl_unknown_attrs[] = {
-        &ipl_type_attr.attr,
-        NULL,
-};
-
-static struct attribute_group ipl_unknown_attr_group = {
-        .attrs = ipl_unknown_attrs,
-};
-
-static ssize_t
-ipl_parameter_read(struct kobject *kobj, char *buf, loff_t off, size_t count)
-{
-        unsigned int size = IPL_PARMBLOCK_SIZE;
-
-        if (off > size)
-                return 0;
-        if (off + count > size)
-                count = size - off;
-
-        memcpy(buf, (void *) IPL_PARMBLOCK_START + off, count);
-        return count;
-}
-
-static struct bin_attribute ipl_parameter_attr = {
-        .attr = {
-                .name = "binary_parameter",
-                .mode = S_IRUGO,
-                .owner = THIS_MODULE,
-        },
-        .size = PAGE_SIZE,
-        .read = &ipl_parameter_read,
-};
-
-static ssize_t
-ipl_scp_data_read(struct kobject *kobj, char *buf, loff_t off, size_t count)
-{
-        unsigned int size =  IPL_PARMBLOCK_START->fcp.scp_data_len;
-        void *scp_data = &IPL_PARMBLOCK_START->fcp.scp_data;
-
-        if (off > size)
-                return 0;
-        if (off + count > size)
-                count = size - off;
-
-        memcpy(buf, scp_data + off, count);
-        return count;
-}
-
-static struct bin_attribute ipl_scp_data_attr = {
-        .attr = {
-                .name = "scp_data",
-                .mode = S_IRUGO,
-                .owner = THIS_MODULE,
-        },
-        .size = PAGE_SIZE,
-        .read = &ipl_scp_data_read,
-};
-
-static decl_subsys(ipl, NULL, NULL);
-
-static int ipl_register_fcp_files(void)
-{
-        int rc;
-
-        rc = sysfs_create_group(&ipl_subsys.kset.kobj,
-                                &ipl_fcp_attr_group);
-        if (rc)
-                goto out;
-        rc = sysfs_create_bin_file(&ipl_subsys.kset.kobj,
-                                   &ipl_parameter_attr);
-        if (rc)
-                goto out_ipl_parm;
-        rc = sysfs_create_bin_file(&ipl_subsys.kset.kobj,
-                                   &ipl_scp_data_attr);
-        if (!rc)
-                goto out;
-
-        sysfs_remove_bin_file(&ipl_subsys.kset.kobj, &ipl_parameter_attr);
-
-out_ipl_parm:
-        sysfs_remove_group(&ipl_subsys.kset.kobj, &ipl_fcp_attr_group);
-out:
-        return rc;
-}
-
-static int __init
-ipl_device_sysfs_register(void) {
-        int rc;
-
-        rc = firmware_register(&ipl_subsys);
-        if (rc)
-                goto out;
-
-        switch (get_ipl_type()) {
-        case ipl_type_ccw:
-                rc = sysfs_create_group(&ipl_subsys.kset.kobj,
-                                        &ipl_ccw_attr_group);
-                break;
-        case ipl_type_fcp:
-                rc = ipl_register_fcp_files();
-                break;
-        default:
-                rc = sysfs_create_group(&ipl_subsys.kset.kobj,
-                                        &ipl_unknown_attr_group);
-                break;
-        }
-
-        if (rc)
-                firmware_unregister(&ipl_subsys);
-out:
-        return rc;
-}
-
-__initcall(ipl_device_sysfs_register);