From ace9429bb58fd418f0c81d4c2835699bddf6bde6 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Thu, 11 Apr 2024 10:27:49 +0200 Subject: Adding upstream version 6.6.15. Signed-off-by: Daniel Baumann --- arch/s390/kernel/ipl.c | 2522 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 2522 insertions(+) create mode 100644 arch/s390/kernel/ipl.c (limited to 'arch/s390/kernel/ipl.c') diff --git a/arch/s390/kernel/ipl.c b/arch/s390/kernel/ipl.c new file mode 100644 index 0000000000..8d0b95c173 --- /dev/null +++ b/arch/s390/kernel/ipl.c @@ -0,0 +1,2522 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * ipl/reipl/dump support for Linux on s390. + * + * Copyright IBM Corp. 2005, 2012 + * Author(s): Michael Holzheu + * Volker Sameske + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include "entry.h" + +#define IPL_PARM_BLOCK_VERSION 0 + +#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" +#define IPL_NVME_DUMP_STR "nvme_dump" +#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" + +/* + * Four shutdown trigger types are supported: + * - panic + * - halt + * - power off + * - reipl + * - restart + */ +#define ON_PANIC_STR "on_panic" +#define ON_HALT_STR "on_halt" +#define ON_POFF_STR "on_poff" +#define ON_REIPL_STR "on_reboot" +#define ON_RESTART_STR "on_restart" + +struct shutdown_action; +struct shutdown_trigger { + char *name; + struct shutdown_action *action; +}; + +/* + * The following shutdown action types are supported: + */ +#define SHUTDOWN_ACTION_IPL_STR "ipl" +#define SHUTDOWN_ACTION_REIPL_STR "reipl" +#define SHUTDOWN_ACTION_DUMP_STR "dump" +#define SHUTDOWN_ACTION_VMCMD_STR "vmcmd" +#define SHUTDOWN_ACTION_STOP_STR "stop" +#define SHUTDOWN_ACTION_DUMP_REIPL_STR "dump_reipl" + +struct shutdown_action { + char *name; + void (*fn) (struct shutdown_trigger *trigger); + int (*init) (void); + int init_rc; +}; + +static char *ipl_type_str(enum ipl_type type) +{ + switch (type) { + case IPL_TYPE_CCW: + 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: + return IPL_FCP_DUMP_STR; + case IPL_TYPE_NSS: + return IPL_NSS_STR; + case IPL_TYPE_NVME: + return IPL_NVME_STR; + case IPL_TYPE_NVME_DUMP: + return IPL_NVME_DUMP_STR; + case IPL_TYPE_UNKNOWN: + default: + return IPL_UNKNOWN_STR; + } +} + +enum dump_type { + DUMP_TYPE_NONE = 1, + 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) +{ + switch (type) { + case DUMP_TYPE_NONE: + 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: + return DUMP_NVME_STR; + default: + return NULL; + } +} + +int __bootdata_preserved(ipl_block_valid); +struct ipl_parameter_block __bootdata_preserved(ipl_block); +int __bootdata_preserved(ipl_secure_flag); + +unsigned long __bootdata_preserved(ipl_cert_list_addr); +unsigned long __bootdata_preserved(ipl_cert_list_size); + +unsigned long __bootdata(early_ipl_comp_list_addr); +unsigned long __bootdata(early_ipl_comp_list_size); + +static int reipl_capabilities = IPL_TYPE_UNKNOWN; + +static enum ipl_type reipl_type = IPL_TYPE_UNKNOWN; +static struct ipl_parameter_block *reipl_block_fcp; +static struct ipl_parameter_block *reipl_block_nvme; +static struct ipl_parameter_block *reipl_block_ccw; +static struct ipl_parameter_block *reipl_block_eckd; +static struct ipl_parameter_block *reipl_block_nss; +static struct ipl_parameter_block *reipl_block_actual; + +static int dump_capabilities = DUMP_TYPE_NONE; +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; + +static bool reipl_nvme_clear; +static bool reipl_fcp_clear; +static bool reipl_ccw_clear; +static bool reipl_eckd_clear; + +static unsigned long os_info_flags; + +static inline int __diag308(unsigned long subcode, unsigned long addr) +{ + union register_pair r1; + + r1.even = addr; + r1.odd = 0; + asm volatile( + " diag %[r1],%[subcode],0x308\n" + "0: nopr %%r7\n" + EX_TABLE(0b,0b) + : [r1] "+&d" (r1.pair) + : [subcode] "d" (subcode) + : "cc", "memory"); + return r1.odd; +} + +int diag308(unsigned long subcode, void *addr) +{ + diag_stat_inc(DIAG_STAT_X308); + return __diag308(subcode, addr ? virt_to_phys(addr) : 0); +} +EXPORT_SYMBOL_GPL(diag308); + +/* SYSFS */ + +#define IPL_ATTR_SHOW_FN(_prefix, _name, _format, args...) \ +static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \ + struct kobj_attribute *attr, \ + char *page) \ +{ \ + return scnprintf(page, PAGE_SIZE, _format, ##args); \ +} + +#define IPL_ATTR_CCW_STORE_FN(_prefix, _name, _ipl_blk) \ +static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \ + struct kobj_attribute *attr, \ + const char *buf, size_t len) \ +{ \ + unsigned long long ssid, devno; \ + \ + if (sscanf(buf, "0.%llx.%llx\n", &ssid, &devno) != 2) \ + return -EINVAL; \ + \ + if (ssid > __MAX_SSID || devno > __MAX_SUBCHANNEL) \ + return -EINVAL; \ + \ + _ipl_blk.ssid = ssid; \ + _ipl_blk.devno = devno; \ + return len; \ +} + +#define DEFINE_IPL_CCW_ATTR_RW(_prefix, _name, _ipl_blk) \ +IPL_ATTR_SHOW_FN(_prefix, _name, "0.%x.%04x\n", \ + _ipl_blk.ssid, _ipl_blk.devno); \ +IPL_ATTR_CCW_STORE_FN(_prefix, _name, _ipl_blk); \ +static struct kobj_attribute sys_##_prefix##_##_name##_attr = \ + __ATTR(_name, 0644, \ + sys_##_prefix##_##_name##_show, \ + sys_##_prefix##_##_name##_store) \ + +#define DEFINE_IPL_ATTR_RO(_prefix, _name, _format, _value) \ +IPL_ATTR_SHOW_FN(_prefix, _name, _format, _value) \ +static struct kobj_attribute sys_##_prefix##_##_name##_attr = \ + __ATTR(_name, 0444, sys_##_prefix##_##_name##_show, NULL) + +#define DEFINE_IPL_ATTR_RW(_prefix, _name, _fmt_out, _fmt_in, _value) \ +IPL_ATTR_SHOW_FN(_prefix, _name, _fmt_out, (unsigned long long) _value) \ +static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \ + struct kobj_attribute *attr, \ + const char *buf, size_t len) \ +{ \ + unsigned long long value; \ + if (sscanf(buf, _fmt_in, &value) != 1) \ + return -EINVAL; \ + _value = value; \ + return len; \ +} \ +static struct kobj_attribute sys_##_prefix##_##_name##_attr = \ + __ATTR(_name, 0644, \ + sys_##_prefix##_##_name##_show, \ + sys_##_prefix##_##_name##_store) + +#define DEFINE_IPL_ATTR_STR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)\ +IPL_ATTR_SHOW_FN(_prefix, _name, _fmt_out, _value) \ +static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \ + struct kobj_attribute *attr, \ + const char *buf, size_t len) \ +{ \ + strscpy(_value, buf, sizeof(_value)); \ + strim(_value); \ + return len; \ +} \ +static struct kobj_attribute sys_##_prefix##_##_name##_attr = \ + __ATTR(_name, 0644, \ + sys_##_prefix##_##_name##_show, \ + sys_##_prefix##_##_name##_store) + +/* + * ipl section + */ + +static __init enum ipl_type get_ipl_type(void) +{ + if (!ipl_block_valid) + return IPL_TYPE_UNKNOWN; + + switch (ipl_block.pb0_hdr.pbt) { + case IPL_PBT_CCW: + return IPL_TYPE_CCW; + case IPL_PBT_FCP: + if (ipl_block.fcp.opt == IPL_PB0_FCP_OPT_DUMP) + return IPL_TYPE_FCP_DUMP; + else + return IPL_TYPE_FCP; + case IPL_PBT_NVME: + if (ipl_block.nvme.opt == IPL_PB0_NVME_OPT_DUMP) + return IPL_TYPE_NVME_DUMP; + else + return IPL_TYPE_NVME; + case IPL_PBT_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; +} + +struct ipl_info ipl_info; +EXPORT_SYMBOL_GPL(ipl_info); + +static ssize_t ipl_type_show(struct kobject *kobj, struct kobj_attribute *attr, + char *page) +{ + return sprintf(page, "%s\n", ipl_type_str(ipl_info.type)); +} + +static struct kobj_attribute sys_ipl_type_attr = __ATTR_RO(ipl_type); + +static ssize_t ipl_secure_show(struct kobject *kobj, + struct kobj_attribute *attr, char *page) +{ + return sprintf(page, "%i\n", !!ipl_secure_flag); +} + +static struct kobj_attribute sys_ipl_secure_attr = + __ATTR(secure, 0444, ipl_secure_show, NULL); + +static ssize_t ipl_has_secure_show(struct kobject *kobj, + struct kobj_attribute *attr, char *page) +{ + return sprintf(page, "%i\n", !!sclp.has_sipl); +} + +static struct kobj_attribute sys_ipl_has_secure_attr = + __ATTR(has_secure, 0444, ipl_has_secure_show, NULL); + +static ssize_t ipl_vm_parm_show(struct kobject *kobj, + struct kobj_attribute *attr, char *page) +{ + char parm[DIAG308_VMPARM_SIZE + 1] = {}; + + if (ipl_block_valid && (ipl_block.pb0_hdr.pbt == IPL_PBT_CCW)) + ipl_block_get_ascii_vmparm(parm, sizeof(parm), &ipl_block); + return sprintf(page, "%s\n", parm); +} + +static struct kobj_attribute sys_ipl_vm_parm_attr = + __ATTR(parm, 0444, ipl_vm_parm_show, NULL); + +static ssize_t sys_ipl_device_show(struct kobject *kobj, + struct kobj_attribute *attr, char *page) +{ + switch (ipl_info.type) { + case IPL_TYPE_CCW: + 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: + case IPL_TYPE_FCP_DUMP: + return sprintf(page, "0.0.%04x\n", ipl_block.fcp.devno); + case IPL_TYPE_NVME: + case IPL_TYPE_NVME_DUMP: + return sprintf(page, "%08ux\n", ipl_block.nvme.fid); + default: + return 0; + } +} + +static struct kobj_attribute sys_ipl_device_attr = + __ATTR(device, 0444, sys_ipl_device_show, NULL); + +static ssize_t ipl_parameter_read(struct file *filp, struct kobject *kobj, + struct bin_attribute *attr, char *buf, + loff_t off, size_t count) +{ + return memory_read_from_buffer(buf, count, &off, &ipl_block, + ipl_block.hdr.len); +} +static struct bin_attribute ipl_parameter_attr = + __BIN_ATTR(binary_parameter, 0444, ipl_parameter_read, NULL, + PAGE_SIZE); + +static ssize_t ipl_scp_data_read(struct file *filp, struct kobject *kobj, + struct bin_attribute *attr, char *buf, + loff_t off, size_t count) +{ + unsigned int size = ipl_block.fcp.scp_data_len; + void *scp_data = &ipl_block.fcp.scp_data; + + return memory_read_from_buffer(buf, count, &off, scp_data, size); +} + +static ssize_t ipl_nvme_scp_data_read(struct file *filp, struct kobject *kobj, + struct bin_attribute *attr, char *buf, + loff_t off, size_t count) +{ + unsigned int size = ipl_block.nvme.scp_data_len; + void *scp_data = &ipl_block.nvme.scp_data; + + return memory_read_from_buffer(buf, count, &off, scp_data, size); +} + +static ssize_t ipl_eckd_scp_data_read(struct file *filp, struct kobject *kobj, + struct bin_attribute *attr, char *buf, + loff_t off, size_t count) +{ + unsigned int size = ipl_block.eckd.scp_data_len; + void *scp_data = &ipl_block.eckd.scp_data; + + return memory_read_from_buffer(buf, count, &off, scp_data, size); +} + +static struct bin_attribute ipl_scp_data_attr = + __BIN_ATTR(scp_data, 0444, ipl_scp_data_read, NULL, PAGE_SIZE); + +static struct bin_attribute ipl_nvme_scp_data_attr = + __BIN_ATTR(scp_data, 0444, ipl_nvme_scp_data_read, NULL, PAGE_SIZE); + +static struct bin_attribute ipl_eckd_scp_data_attr = + __BIN_ATTR(scp_data, 0444, ipl_eckd_scp_data_read, NULL, PAGE_SIZE); + +static struct bin_attribute *ipl_fcp_bin_attrs[] = { + &ipl_parameter_attr, + &ipl_scp_data_attr, + NULL, +}; + +static struct bin_attribute *ipl_nvme_bin_attrs[] = { + &ipl_parameter_attr, + &ipl_nvme_scp_data_attr, + NULL, +}; + +static struct bin_attribute *ipl_eckd_bin_attrs[] = { + &ipl_parameter_attr, + &ipl_eckd_scp_data_attr, + NULL, +}; + +/* FCP ipl device attributes */ + +DEFINE_IPL_ATTR_RO(ipl_fcp, wwpn, "0x%016llx\n", + (unsigned long long)ipl_block.fcp.wwpn); +DEFINE_IPL_ATTR_RO(ipl_fcp, lun, "0x%016llx\n", + (unsigned long long)ipl_block.fcp.lun); +DEFINE_IPL_ATTR_RO(ipl_fcp, bootprog, "%lld\n", + (unsigned long long)ipl_block.fcp.bootprog); +DEFINE_IPL_ATTR_RO(ipl_fcp, br_lba, "%lld\n", + (unsigned long long)ipl_block.fcp.br_lba); + +/* NVMe ipl device attributes */ +DEFINE_IPL_ATTR_RO(ipl_nvme, fid, "0x%08llx\n", + (unsigned long long)ipl_block.nvme.fid); +DEFINE_IPL_ATTR_RO(ipl_nvme, nsid, "0x%08llx\n", + (unsigned long long)ipl_block.nvme.nsid); +DEFINE_IPL_ATTR_RO(ipl_nvme, bootprog, "%lld\n", + (unsigned long long)ipl_block.nvme.bootprog); +DEFINE_IPL_ATTR_RO(ipl_nvme, br_lba, "%lld\n", + (unsigned long long)ipl_block.nvme.br_lba); + +/* ECKD ipl device attributes */ +DEFINE_IPL_ATTR_RO(ipl_eckd, bootprog, "%lld\n", + (unsigned long long)ipl_block.eckd.bootprog); + +#define IPL_ATTR_BR_CHR_SHOW_FN(_name, _ipb) \ +static ssize_t eckd_##_name##_br_chr_show(struct kobject *kobj, \ + struct kobj_attribute *attr, \ + char *buf) \ +{ \ + struct ipl_pb0_eckd *ipb = &(_ipb); \ + \ + if (!ipb->br_chr.cyl && \ + !ipb->br_chr.head && \ + !ipb->br_chr.record) \ + return sprintf(buf, "auto\n"); \ + \ + return sprintf(buf, "0x%x,0x%x,0x%x\n", \ + ipb->br_chr.cyl, \ + ipb->br_chr.head, \ + ipb->br_chr.record); \ +} + +#define IPL_ATTR_BR_CHR_STORE_FN(_name, _ipb) \ +static ssize_t eckd_##_name##_br_chr_store(struct kobject *kobj, \ + struct kobj_attribute *attr, \ + const char *buf, size_t len) \ +{ \ + struct ipl_pb0_eckd *ipb = &(_ipb); \ + unsigned long args[3] = { 0 }; \ + char *p, *p1, *tmp = NULL; \ + int i, rc; \ + \ + if (!strncmp(buf, "auto", 4)) \ + goto out; \ + \ + tmp = kstrdup(buf, GFP_KERNEL); \ + p = tmp; \ + for (i = 0; i < 3; i++) { \ + p1 = strsep(&p, ", "); \ + if (!p1) { \ + rc = -EINVAL; \ + goto err; \ + } \ + rc = kstrtoul(p1, 0, args + i); \ + if (rc) \ + goto err; \ + } \ + \ + rc = -EINVAL; \ + if (i != 3) \ + goto err; \ + \ + if ((args[0] || args[1]) && !args[2]) \ + goto err; \ + \ + if (args[0] > UINT_MAX || args[1] > 255 || args[2] > 255) \ + goto err; \ + \ +out: \ + ipb->br_chr.cyl = args[0]; \ + ipb->br_chr.head = args[1]; \ + ipb->br_chr.record = args[2]; \ + rc = len; \ +err: \ + kfree(tmp); \ + return rc; \ +} + +IPL_ATTR_BR_CHR_SHOW_FN(ipl, ipl_block.eckd); +static struct kobj_attribute sys_ipl_eckd_br_chr_attr = + __ATTR(br_chr, 0644, eckd_ipl_br_chr_show, NULL); + +IPL_ATTR_BR_CHR_SHOW_FN(reipl, reipl_block_eckd->eckd); +IPL_ATTR_BR_CHR_STORE_FN(reipl, reipl_block_eckd->eckd); + +static struct kobj_attribute sys_reipl_eckd_br_chr_attr = + __ATTR(br_chr, 0644, eckd_reipl_br_chr_show, eckd_reipl_br_chr_store); + +static ssize_t ipl_ccw_loadparm_show(struct kobject *kobj, + struct kobj_attribute *attr, char *page) +{ + char loadparm[LOADPARM_LEN + 1] = {}; + + if (!sclp_ipl_info.is_valid) + return sprintf(page, "#unknown#\n"); + memcpy(loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN); + EBCASC(loadparm, LOADPARM_LEN); + strim(loadparm); + return sprintf(page, "%s\n", loadparm); +} + +static struct kobj_attribute sys_ipl_ccw_loadparm_attr = + __ATTR(loadparm, 0444, ipl_ccw_loadparm_show, NULL); + +static struct attribute *ipl_fcp_attrs[] = { + &sys_ipl_device_attr.attr, + &sys_ipl_fcp_wwpn_attr.attr, + &sys_ipl_fcp_lun_attr.attr, + &sys_ipl_fcp_bootprog_attr.attr, + &sys_ipl_fcp_br_lba_attr.attr, + &sys_ipl_ccw_loadparm_attr.attr, + NULL, +}; + +static struct attribute_group ipl_fcp_attr_group = { + .attrs = ipl_fcp_attrs, + .bin_attrs = ipl_fcp_bin_attrs, +}; + +static struct attribute *ipl_nvme_attrs[] = { + &sys_ipl_nvme_fid_attr.attr, + &sys_ipl_nvme_nsid_attr.attr, + &sys_ipl_nvme_bootprog_attr.attr, + &sys_ipl_nvme_br_lba_attr.attr, + &sys_ipl_ccw_loadparm_attr.attr, + NULL, +}; + +static struct attribute_group ipl_nvme_attr_group = { + .attrs = ipl_nvme_attrs, + .bin_attrs = ipl_nvme_bin_attrs, +}; + +static struct attribute *ipl_eckd_attrs[] = { + &sys_ipl_eckd_bootprog_attr.attr, + &sys_ipl_eckd_br_chr_attr.attr, + &sys_ipl_ccw_loadparm_attr.attr, + &sys_ipl_device_attr.attr, + NULL, +}; + +static struct attribute_group ipl_eckd_attr_group = { + .attrs = ipl_eckd_attrs, + .bin_attrs = ipl_eckd_bin_attrs, +}; + +/* CCW ipl device attributes */ + +static struct attribute *ipl_ccw_attrs_vm[] = { + &sys_ipl_device_attr.attr, + &sys_ipl_ccw_loadparm_attr.attr, + &sys_ipl_vm_parm_attr.attr, + NULL, +}; + +static struct attribute *ipl_ccw_attrs_lpar[] = { + &sys_ipl_device_attr.attr, + &sys_ipl_ccw_loadparm_attr.attr, + NULL, +}; + +static struct attribute_group ipl_ccw_attr_group_vm = { + .attrs = ipl_ccw_attrs_vm, +}; + +static struct attribute_group ipl_ccw_attr_group_lpar = { + .attrs = ipl_ccw_attrs_lpar +}; + +static struct attribute *ipl_common_attrs[] = { + &sys_ipl_type_attr.attr, + &sys_ipl_secure_attr.attr, + &sys_ipl_has_secure_attr.attr, + NULL, +}; + +static struct attribute_group ipl_common_attr_group = { + .attrs = ipl_common_attrs, +}; + +static struct kset *ipl_kset; + +static void __ipl_run(void *unused) +{ + diag308(DIAG308_LOAD_CLEAR, NULL); +} + +static void ipl_run(struct shutdown_trigger *trigger) +{ + smp_call_ipl_cpu(__ipl_run, NULL); +} + +static int __init ipl_init(void) +{ + int rc; + + ipl_kset = kset_create_and_add("ipl", NULL, firmware_kobj); + if (!ipl_kset) { + rc = -ENOMEM; + goto out; + } + rc = sysfs_create_group(&ipl_kset->kobj, &ipl_common_attr_group); + if (rc) + goto out; + switch (ipl_info.type) { + case IPL_TYPE_CCW: + if (MACHINE_IS_VM) + rc = sysfs_create_group(&ipl_kset->kobj, + &ipl_ccw_attr_group_vm); + else + rc = sysfs_create_group(&ipl_kset->kobj, + &ipl_ccw_attr_group_lpar); + break; + case IPL_TYPE_ECKD: + case IPL_TYPE_ECKD_DUMP: + rc = sysfs_create_group(&ipl_kset->kobj, &ipl_eckd_attr_group); + break; + case IPL_TYPE_FCP: + case IPL_TYPE_FCP_DUMP: + rc = sysfs_create_group(&ipl_kset->kobj, &ipl_fcp_attr_group); + break; + case IPL_TYPE_NVME: + case IPL_TYPE_NVME_DUMP: + rc = sysfs_create_group(&ipl_kset->kobj, &ipl_nvme_attr_group); + break; + default: + break; + } +out: + if (rc) + panic("ipl_init failed: rc = %i\n", rc); + + return 0; +} + +static struct shutdown_action __refdata ipl_action = { + .name = SHUTDOWN_ACTION_IPL_STR, + .fn = ipl_run, + .init = ipl_init, +}; + +/* + * reipl shutdown action: Reboot Linux on shutdown. + */ + +/* VM IPL PARM attributes */ +static ssize_t reipl_generic_vmparm_show(struct ipl_parameter_block *ipb, + char *page) +{ + char vmparm[DIAG308_VMPARM_SIZE + 1] = {}; + + ipl_block_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb); + return sprintf(page, "%s\n", vmparm); +} + +static ssize_t reipl_generic_vmparm_store(struct ipl_parameter_block *ipb, + size_t vmparm_max, + const char *buf, size_t len) +{ + int i, ip_len; + + /* ignore trailing newline */ + ip_len = len; + if ((len > 0) && (buf[len - 1] == '\n')) + ip_len--; + + if (ip_len > vmparm_max) + return -EINVAL; + + /* parm is used to store kernel options, check for common chars */ + for (i = 0; i < ip_len; i++) + if (!(isalnum(buf[i]) || isascii(buf[i]) || isprint(buf[i]))) + return -EINVAL; + + memset(ipb->ccw.vm_parm, 0, DIAG308_VMPARM_SIZE); + ipb->ccw.vm_parm_len = ip_len; + if (ip_len > 0) { + ipb->ccw.vm_flags |= IPL_PB0_CCW_VM_FLAG_VP; + memcpy(ipb->ccw.vm_parm, buf, ip_len); + ASCEBC(ipb->ccw.vm_parm, ip_len); + } else { + ipb->ccw.vm_flags &= ~IPL_PB0_CCW_VM_FLAG_VP; + } + + return len; +} + +/* NSS wrapper */ +static ssize_t reipl_nss_vmparm_show(struct kobject *kobj, + struct kobj_attribute *attr, char *page) +{ + return reipl_generic_vmparm_show(reipl_block_nss, page); +} + +static ssize_t reipl_nss_vmparm_store(struct kobject *kobj, + struct kobj_attribute *attr, + const char *buf, size_t len) +{ + return reipl_generic_vmparm_store(reipl_block_nss, 56, buf, len); +} + +/* CCW wrapper */ +static ssize_t reipl_ccw_vmparm_show(struct kobject *kobj, + struct kobj_attribute *attr, char *page) +{ + return reipl_generic_vmparm_show(reipl_block_ccw, page); +} + +static ssize_t reipl_ccw_vmparm_store(struct kobject *kobj, + struct kobj_attribute *attr, + const char *buf, size_t len) +{ + return reipl_generic_vmparm_store(reipl_block_ccw, 64, buf, len); +} + +static struct kobj_attribute sys_reipl_nss_vmparm_attr = + __ATTR(parm, 0644, reipl_nss_vmparm_show, + reipl_nss_vmparm_store); +static struct kobj_attribute sys_reipl_ccw_vmparm_attr = + __ATTR(parm, 0644, reipl_ccw_vmparm_show, + reipl_ccw_vmparm_store); + +/* FCP reipl device attributes */ + +static ssize_t reipl_fcp_scpdata_read(struct file *filp, struct kobject *kobj, + struct bin_attribute *attr, + char *buf, loff_t off, size_t count) +{ + size_t size = reipl_block_fcp->fcp.scp_data_len; + void *scp_data = reipl_block_fcp->fcp.scp_data; + + return memory_read_from_buffer(buf, count, &off, scp_data, size); +} + +static ssize_t reipl_fcp_scpdata_write(struct file *filp, struct kobject *kobj, + struct bin_attribute *attr, + char *buf, loff_t off, size_t count) +{ + size_t scpdata_len = count; + size_t padding; + + + if (off) + return -EINVAL; + + memcpy(reipl_block_fcp->fcp.scp_data, buf, count); + if (scpdata_len % 8) { + padding = 8 - (scpdata_len % 8); + memset(reipl_block_fcp->fcp.scp_data + scpdata_len, + 0, padding); + scpdata_len += padding; + } + + reipl_block_fcp->hdr.len = IPL_BP_FCP_LEN + scpdata_len; + reipl_block_fcp->fcp.len = IPL_BP0_FCP_LEN + scpdata_len; + reipl_block_fcp->fcp.scp_data_len = scpdata_len; + + return count; +} +static struct bin_attribute sys_reipl_fcp_scp_data_attr = + __BIN_ATTR(scp_data, 0644, reipl_fcp_scpdata_read, + reipl_fcp_scpdata_write, DIAG308_SCPDATA_SIZE); + +static struct bin_attribute *reipl_fcp_bin_attrs[] = { + &sys_reipl_fcp_scp_data_attr, + NULL, +}; + +DEFINE_IPL_ATTR_RW(reipl_fcp, wwpn, "0x%016llx\n", "%llx\n", + reipl_block_fcp->fcp.wwpn); +DEFINE_IPL_ATTR_RW(reipl_fcp, lun, "0x%016llx\n", "%llx\n", + reipl_block_fcp->fcp.lun); +DEFINE_IPL_ATTR_RW(reipl_fcp, bootprog, "%lld\n", "%lld\n", + reipl_block_fcp->fcp.bootprog); +DEFINE_IPL_ATTR_RW(reipl_fcp, br_lba, "%lld\n", "%lld\n", + reipl_block_fcp->fcp.br_lba); +DEFINE_IPL_ATTR_RW(reipl_fcp, device, "0.0.%04llx\n", "0.0.%llx\n", + reipl_block_fcp->fcp.devno); + +static void reipl_get_ascii_loadparm(char *loadparm, + struct ipl_parameter_block *ibp) +{ + memcpy(loadparm, ibp->common.loadparm, LOADPARM_LEN); + EBCASC(loadparm, LOADPARM_LEN); + loadparm[LOADPARM_LEN] = 0; + strim(loadparm); +} + +static ssize_t reipl_generic_loadparm_show(struct ipl_parameter_block *ipb, + char *page) +{ + char buf[LOADPARM_LEN + 1]; + + reipl_get_ascii_loadparm(buf, ipb); + return sprintf(page, "%s\n", buf); +} + +static ssize_t reipl_generic_loadparm_store(struct ipl_parameter_block *ipb, + const char *buf, size_t len) +{ + int i, lp_len; + + /* ignore trailing newline */ + lp_len = len; + if ((len > 0) && (buf[len - 1] == '\n')) + lp_len--; + /* loadparm can have max 8 characters and must not start with a blank */ + if ((lp_len > LOADPARM_LEN) || ((lp_len > 0) && (buf[0] == ' '))) + return -EINVAL; + /* loadparm can only contain "a-z,A-Z,0-9,SP,." */ + for (i = 0; i < lp_len; i++) { + if (isalpha(buf[i]) || isdigit(buf[i]) || (buf[i] == ' ') || + (buf[i] == '.')) + continue; + return -EINVAL; + } + /* initialize loadparm with blanks */ + memset(ipb->common.loadparm, ' ', LOADPARM_LEN); + /* copy and convert to ebcdic */ + memcpy(ipb->common.loadparm, buf, lp_len); + ASCEBC(ipb->common.loadparm, LOADPARM_LEN); + ipb->common.flags |= IPL_PB0_FLAG_LOADPARM; + return len; +} + +#define DEFINE_GENERIC_LOADPARM(name) \ +static ssize_t reipl_##name##_loadparm_show(struct kobject *kobj, \ + struct kobj_attribute *attr, char *page) \ +{ \ + return reipl_generic_loadparm_show(reipl_block_##name, page); \ +} \ +static ssize_t reipl_##name##_loadparm_store(struct kobject *kobj, \ + struct kobj_attribute *attr, \ + const char *buf, size_t len) \ +{ \ + return reipl_generic_loadparm_store(reipl_block_##name, buf, len); \ +} \ +static struct kobj_attribute sys_reipl_##name##_loadparm_attr = \ + __ATTR(loadparm, 0644, reipl_##name##_loadparm_show, \ + reipl_##name##_loadparm_store) + +DEFINE_GENERIC_LOADPARM(fcp); +DEFINE_GENERIC_LOADPARM(nvme); +DEFINE_GENERIC_LOADPARM(ccw); +DEFINE_GENERIC_LOADPARM(nss); +DEFINE_GENERIC_LOADPARM(eckd); + +static ssize_t reipl_fcp_clear_show(struct kobject *kobj, + struct kobj_attribute *attr, char *page) +{ + return sprintf(page, "%u\n", reipl_fcp_clear); +} + +static ssize_t reipl_fcp_clear_store(struct kobject *kobj, + struct kobj_attribute *attr, + const char *buf, size_t len) +{ + if (kstrtobool(buf, &reipl_fcp_clear) < 0) + return -EINVAL; + return len; +} + +static struct attribute *reipl_fcp_attrs[] = { + &sys_reipl_fcp_device_attr.attr, + &sys_reipl_fcp_wwpn_attr.attr, + &sys_reipl_fcp_lun_attr.attr, + &sys_reipl_fcp_bootprog_attr.attr, + &sys_reipl_fcp_br_lba_attr.attr, + &sys_reipl_fcp_loadparm_attr.attr, + NULL, +}; + +static struct attribute_group reipl_fcp_attr_group = { + .attrs = reipl_fcp_attrs, + .bin_attrs = reipl_fcp_bin_attrs, +}; + +static struct kobj_attribute sys_reipl_fcp_clear_attr = + __ATTR(clear, 0644, reipl_fcp_clear_show, reipl_fcp_clear_store); + +/* NVME reipl device attributes */ + +static ssize_t reipl_nvme_scpdata_read(struct file *filp, struct kobject *kobj, + struct bin_attribute *attr, + char *buf, loff_t off, size_t count) +{ + size_t size = reipl_block_nvme->nvme.scp_data_len; + void *scp_data = reipl_block_nvme->nvme.scp_data; + + return memory_read_from_buffer(buf, count, &off, scp_data, size); +} + +static ssize_t reipl_nvme_scpdata_write(struct file *filp, struct kobject *kobj, + struct bin_attribute *attr, + char *buf, loff_t off, size_t count) +{ + size_t scpdata_len = count; + size_t padding; + + if (off) + return -EINVAL; + + memcpy(reipl_block_nvme->nvme.scp_data, buf, count); + if (scpdata_len % 8) { + padding = 8 - (scpdata_len % 8); + memset(reipl_block_nvme->nvme.scp_data + scpdata_len, + 0, padding); + scpdata_len += padding; + } + + reipl_block_nvme->hdr.len = IPL_BP_FCP_LEN + scpdata_len; + reipl_block_nvme->nvme.len = IPL_BP0_FCP_LEN + scpdata_len; + reipl_block_nvme->nvme.scp_data_len = scpdata_len; + + return count; +} + +static struct bin_attribute sys_reipl_nvme_scp_data_attr = + __BIN_ATTR(scp_data, 0644, reipl_nvme_scpdata_read, + reipl_nvme_scpdata_write, DIAG308_SCPDATA_SIZE); + +static struct bin_attribute *reipl_nvme_bin_attrs[] = { + &sys_reipl_nvme_scp_data_attr, + NULL, +}; + +DEFINE_IPL_ATTR_RW(reipl_nvme, fid, "0x%08llx\n", "%llx\n", + reipl_block_nvme->nvme.fid); +DEFINE_IPL_ATTR_RW(reipl_nvme, nsid, "0x%08llx\n", "%llx\n", + reipl_block_nvme->nvme.nsid); +DEFINE_IPL_ATTR_RW(reipl_nvme, bootprog, "%lld\n", "%lld\n", + reipl_block_nvme->nvme.bootprog); +DEFINE_IPL_ATTR_RW(reipl_nvme, br_lba, "%lld\n", "%lld\n", + reipl_block_nvme->nvme.br_lba); + +static struct attribute *reipl_nvme_attrs[] = { + &sys_reipl_nvme_fid_attr.attr, + &sys_reipl_nvme_nsid_attr.attr, + &sys_reipl_nvme_bootprog_attr.attr, + &sys_reipl_nvme_br_lba_attr.attr, + &sys_reipl_nvme_loadparm_attr.attr, + NULL, +}; + +static struct attribute_group reipl_nvme_attr_group = { + .attrs = reipl_nvme_attrs, + .bin_attrs = reipl_nvme_bin_attrs +}; + +static ssize_t reipl_nvme_clear_show(struct kobject *kobj, + struct kobj_attribute *attr, char *page) +{ + return sprintf(page, "%u\n", reipl_nvme_clear); +} + +static ssize_t reipl_nvme_clear_store(struct kobject *kobj, + struct kobj_attribute *attr, + const char *buf, size_t len) +{ + if (kstrtobool(buf, &reipl_nvme_clear) < 0) + return -EINVAL; + return len; +} + +static struct kobj_attribute sys_reipl_nvme_clear_attr = + __ATTR(clear, 0644, reipl_nvme_clear_show, reipl_nvme_clear_store); + +/* CCW reipl device attributes */ +DEFINE_IPL_CCW_ATTR_RW(reipl_ccw, device, reipl_block_ccw->ccw); + +static ssize_t reipl_ccw_clear_show(struct kobject *kobj, + struct kobj_attribute *attr, char *page) +{ + return sprintf(page, "%u\n", reipl_ccw_clear); +} + +static ssize_t reipl_ccw_clear_store(struct kobject *kobj, + struct kobj_attribute *attr, + const char *buf, size_t len) +{ + if (kstrtobool(buf, &reipl_ccw_clear) < 0) + return -EINVAL; + return len; +} + +static struct kobj_attribute sys_reipl_ccw_clear_attr = + __ATTR(clear, 0644, reipl_ccw_clear_show, reipl_ccw_clear_store); + +static struct attribute *reipl_ccw_attrs_vm[] = { + &sys_reipl_ccw_device_attr.attr, + &sys_reipl_ccw_loadparm_attr.attr, + &sys_reipl_ccw_vmparm_attr.attr, + &sys_reipl_ccw_clear_attr.attr, + NULL, +}; + +static struct attribute *reipl_ccw_attrs_lpar[] = { + &sys_reipl_ccw_device_attr.attr, + &sys_reipl_ccw_loadparm_attr.attr, + &sys_reipl_ccw_clear_attr.attr, + NULL, +}; + +static struct attribute_group reipl_ccw_attr_group_vm = { + .name = IPL_CCW_STR, + .attrs = reipl_ccw_attrs_vm, +}; + +static struct attribute_group reipl_ccw_attr_group_lpar = { + .name = IPL_CCW_STR, + .attrs = reipl_ccw_attrs_lpar, +}; + +/* ECKD reipl device attributes */ + +static ssize_t reipl_eckd_scpdata_read(struct file *filp, struct kobject *kobj, + struct bin_attribute *attr, + char *buf, loff_t off, size_t count) +{ + size_t size = reipl_block_eckd->eckd.scp_data_len; + void *scp_data = reipl_block_eckd->eckd.scp_data; + + return memory_read_from_buffer(buf, count, &off, scp_data, size); +} + +static ssize_t reipl_eckd_scpdata_write(struct file *filp, struct kobject *kobj, + struct bin_attribute *attr, + char *buf, loff_t off, size_t count) +{ + size_t scpdata_len = count; + size_t padding; + + if (off) + return -EINVAL; + + memcpy(reipl_block_eckd->eckd.scp_data, buf, count); + if (scpdata_len % 8) { + padding = 8 - (scpdata_len % 8); + memset(reipl_block_eckd->eckd.scp_data + scpdata_len, + 0, padding); + scpdata_len += padding; + } + + reipl_block_eckd->hdr.len = IPL_BP_ECKD_LEN + scpdata_len; + reipl_block_eckd->eckd.len = IPL_BP0_ECKD_LEN + scpdata_len; + reipl_block_eckd->eckd.scp_data_len = scpdata_len; + + return count; +} + +static struct bin_attribute sys_reipl_eckd_scp_data_attr = + __BIN_ATTR(scp_data, 0644, reipl_eckd_scpdata_read, + reipl_eckd_scpdata_write, DIAG308_SCPDATA_SIZE); + +static struct bin_attribute *reipl_eckd_bin_attrs[] = { + &sys_reipl_eckd_scp_data_attr, + NULL, +}; + +DEFINE_IPL_CCW_ATTR_RW(reipl_eckd, device, reipl_block_eckd->eckd); +DEFINE_IPL_ATTR_RW(reipl_eckd, bootprog, "%lld\n", "%lld\n", + reipl_block_eckd->eckd.bootprog); + +static struct attribute *reipl_eckd_attrs[] = { + &sys_reipl_eckd_device_attr.attr, + &sys_reipl_eckd_bootprog_attr.attr, + &sys_reipl_eckd_br_chr_attr.attr, + &sys_reipl_eckd_loadparm_attr.attr, + NULL, +}; + +static struct attribute_group reipl_eckd_attr_group = { + .attrs = reipl_eckd_attrs, + .bin_attrs = reipl_eckd_bin_attrs +}; + +static ssize_t reipl_eckd_clear_show(struct kobject *kobj, + struct kobj_attribute *attr, char *page) +{ + return sprintf(page, "%u\n", reipl_eckd_clear); +} + +static ssize_t reipl_eckd_clear_store(struct kobject *kobj, + struct kobj_attribute *attr, + const char *buf, size_t len) +{ + if (kstrtobool(buf, &reipl_eckd_clear) < 0) + return -EINVAL; + return len; +} + +static struct kobj_attribute sys_reipl_eckd_clear_attr = + __ATTR(clear, 0644, reipl_eckd_clear_show, reipl_eckd_clear_store); + +/* NSS reipl device attributes */ +static void reipl_get_ascii_nss_name(char *dst, + struct ipl_parameter_block *ipb) +{ + memcpy(dst, ipb->ccw.nss_name, NSS_NAME_SIZE); + EBCASC(dst, NSS_NAME_SIZE); + dst[NSS_NAME_SIZE] = 0; +} + +static ssize_t reipl_nss_name_show(struct kobject *kobj, + struct kobj_attribute *attr, char *page) +{ + char nss_name[NSS_NAME_SIZE + 1] = {}; + + reipl_get_ascii_nss_name(nss_name, reipl_block_nss); + return sprintf(page, "%s\n", nss_name); +} + +static ssize_t reipl_nss_name_store(struct kobject *kobj, + struct kobj_attribute *attr, + const char *buf, size_t len) +{ + int nss_len; + + /* ignore trailing newline */ + nss_len = len; + if ((len > 0) && (buf[len - 1] == '\n')) + nss_len--; + + if (nss_len > NSS_NAME_SIZE) + return -EINVAL; + + memset(reipl_block_nss->ccw.nss_name, 0x40, NSS_NAME_SIZE); + if (nss_len > 0) { + reipl_block_nss->ccw.vm_flags |= IPL_PB0_CCW_VM_FLAG_NSS; + memcpy(reipl_block_nss->ccw.nss_name, buf, nss_len); + ASCEBC(reipl_block_nss->ccw.nss_name, nss_len); + EBC_TOUPPER(reipl_block_nss->ccw.nss_name, nss_len); + } else { + reipl_block_nss->ccw.vm_flags &= ~IPL_PB0_CCW_VM_FLAG_NSS; + } + + return len; +} + +static struct kobj_attribute sys_reipl_nss_name_attr = + __ATTR(name, 0644, reipl_nss_name_show, + reipl_nss_name_store); + +static struct attribute *reipl_nss_attrs[] = { + &sys_reipl_nss_name_attr.attr, + &sys_reipl_nss_loadparm_attr.attr, + &sys_reipl_nss_vmparm_attr.attr, + NULL, +}; + +static struct attribute_group reipl_nss_attr_group = { + .name = IPL_NSS_STR, + .attrs = reipl_nss_attrs, +}; + +void set_os_info_reipl_block(void) +{ + os_info_entry_add(OS_INFO_REIPL_BLOCK, reipl_block_actual, + reipl_block_actual->hdr.len); +} + +/* reipl type */ + +static int reipl_set_type(enum ipl_type type) +{ + if (!(reipl_capabilities & type)) + return -EINVAL; + + switch(type) { + case IPL_TYPE_CCW: + reipl_block_actual = reipl_block_ccw; + break; + case IPL_TYPE_ECKD: + reipl_block_actual = reipl_block_eckd; + break; + case IPL_TYPE_FCP: + reipl_block_actual = reipl_block_fcp; + break; + case IPL_TYPE_NVME: + reipl_block_actual = reipl_block_nvme; + break; + case IPL_TYPE_NSS: + reipl_block_actual = reipl_block_nss; + break; + default: + break; + } + reipl_type = type; + return 0; +} + +static ssize_t reipl_type_show(struct kobject *kobj, + struct kobj_attribute *attr, char *page) +{ + return sprintf(page, "%s\n", ipl_type_str(reipl_type)); +} + +static ssize_t reipl_type_store(struct kobject *kobj, + struct kobj_attribute *attr, + const char *buf, size_t len) +{ + int rc = -EINVAL; + + if (strncmp(buf, IPL_CCW_STR, strlen(IPL_CCW_STR)) == 0) + rc = reipl_set_type(IPL_TYPE_CCW); + else if (strncmp(buf, IPL_ECKD_STR, strlen(IPL_ECKD_STR)) == 0) + rc = reipl_set_type(IPL_TYPE_ECKD); + else if (strncmp(buf, IPL_FCP_STR, strlen(IPL_FCP_STR)) == 0) + rc = reipl_set_type(IPL_TYPE_FCP); + else if (strncmp(buf, IPL_NVME_STR, strlen(IPL_NVME_STR)) == 0) + rc = reipl_set_type(IPL_TYPE_NVME); + else if (strncmp(buf, IPL_NSS_STR, strlen(IPL_NSS_STR)) == 0) + rc = reipl_set_type(IPL_TYPE_NSS); + return (rc != 0) ? rc : len; +} + +static struct kobj_attribute reipl_type_attr = + __ATTR(reipl_type, 0644, reipl_type_show, reipl_type_store); + +static struct kset *reipl_kset; +static struct kset *reipl_fcp_kset; +static struct kset *reipl_nvme_kset; +static struct kset *reipl_eckd_kset; + +static void __reipl_run(void *unused) +{ + switch (reipl_type) { + case IPL_TYPE_CCW: + diag308(DIAG308_SET, reipl_block_ccw); + if (reipl_ccw_clear) + diag308(DIAG308_LOAD_CLEAR, NULL); + else + diag308(DIAG308_LOAD_NORMAL_DUMP, NULL); + break; + case IPL_TYPE_ECKD: + diag308(DIAG308_SET, reipl_block_eckd); + if (reipl_eckd_clear) + diag308(DIAG308_LOAD_CLEAR, NULL); + else + diag308(DIAG308_LOAD_NORMAL, NULL); + break; + case IPL_TYPE_FCP: + diag308(DIAG308_SET, reipl_block_fcp); + if (reipl_fcp_clear) + diag308(DIAG308_LOAD_CLEAR, NULL); + else + diag308(DIAG308_LOAD_NORMAL, NULL); + break; + case IPL_TYPE_NVME: + diag308(DIAG308_SET, reipl_block_nvme); + if (reipl_nvme_clear) + diag308(DIAG308_LOAD_CLEAR, NULL); + else + diag308(DIAG308_LOAD_NORMAL, NULL); + break; + case IPL_TYPE_NSS: + diag308(DIAG308_SET, reipl_block_nss); + diag308(DIAG308_LOAD_CLEAR, NULL); + break; + case IPL_TYPE_UNKNOWN: + diag308(DIAG308_LOAD_CLEAR, NULL); + break; + case IPL_TYPE_FCP_DUMP: + case IPL_TYPE_NVME_DUMP: + case IPL_TYPE_ECKD_DUMP: + break; + } + disabled_wait(); +} + +static void reipl_run(struct shutdown_trigger *trigger) +{ + smp_call_ipl_cpu(__reipl_run, NULL); +} + +static void reipl_block_ccw_init(struct ipl_parameter_block *ipb) +{ + ipb->hdr.len = IPL_BP_CCW_LEN; + ipb->hdr.version = IPL_PARM_BLOCK_VERSION; + ipb->pb0_hdr.len = IPL_BP0_CCW_LEN; + ipb->pb0_hdr.pbt = IPL_PBT_CCW; +} + +static void reipl_block_ccw_fill_parms(struct ipl_parameter_block *ipb) +{ + /* LOADPARM */ + /* check if read scp info worked and set loadparm */ + if (sclp_ipl_info.is_valid) + memcpy(ipb->ccw.loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN); + else + /* read scp info failed: set empty loadparm (EBCDIC blanks) */ + memset(ipb->ccw.loadparm, 0x40, LOADPARM_LEN); + ipb->ccw.flags = IPL_PB0_FLAG_LOADPARM; + + /* VM PARM */ + if (MACHINE_IS_VM && ipl_block_valid && + (ipl_block.ccw.vm_flags & IPL_PB0_CCW_VM_FLAG_VP)) { + + ipb->ccw.vm_flags |= IPL_PB0_CCW_VM_FLAG_VP; + ipb->ccw.vm_parm_len = ipl_block.ccw.vm_parm_len; + memcpy(ipb->ccw.vm_parm, + ipl_block.ccw.vm_parm, DIAG308_VMPARM_SIZE); + } +} + +static int __init reipl_nss_init(void) +{ + int rc; + + if (!MACHINE_IS_VM) + return 0; + + reipl_block_nss = (void *) get_zeroed_page(GFP_KERNEL); + if (!reipl_block_nss) + return -ENOMEM; + + rc = sysfs_create_group(&reipl_kset->kobj, &reipl_nss_attr_group); + if (rc) + return rc; + + reipl_block_ccw_init(reipl_block_nss); + reipl_capabilities |= IPL_TYPE_NSS; + return 0; +} + +static int __init reipl_ccw_init(void) +{ + int rc; + + reipl_block_ccw = (void *) get_zeroed_page(GFP_KERNEL); + if (!reipl_block_ccw) + return -ENOMEM; + + rc = sysfs_create_group(&reipl_kset->kobj, + MACHINE_IS_VM ? &reipl_ccw_attr_group_vm + : &reipl_ccw_attr_group_lpar); + if (rc) + return rc; + + reipl_block_ccw_init(reipl_block_ccw); + if (ipl_info.type == IPL_TYPE_CCW) { + reipl_block_ccw->ccw.ssid = ipl_block.ccw.ssid; + reipl_block_ccw->ccw.devno = ipl_block.ccw.devno; + reipl_block_ccw_fill_parms(reipl_block_ccw); + } + + reipl_capabilities |= IPL_TYPE_CCW; + return 0; +} + +static int __init reipl_fcp_init(void) +{ + int rc; + + reipl_block_fcp = (void *) get_zeroed_page(GFP_KERNEL); + if (!reipl_block_fcp) + return -ENOMEM; + + /* sysfs: create fcp kset for mixing attr group and bin attrs */ + reipl_fcp_kset = kset_create_and_add(IPL_FCP_STR, NULL, + &reipl_kset->kobj); + if (!reipl_fcp_kset) { + free_page((unsigned long) reipl_block_fcp); + return -ENOMEM; + } + + rc = sysfs_create_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group); + if (rc) + goto out1; + + if (test_facility(141)) { + rc = sysfs_create_file(&reipl_fcp_kset->kobj, + &sys_reipl_fcp_clear_attr.attr); + if (rc) + goto out2; + } else { + reipl_fcp_clear = true; + } + + if (ipl_info.type == IPL_TYPE_FCP) { + memcpy(reipl_block_fcp, &ipl_block, sizeof(ipl_block)); + /* + * Fix loadparm: There are systems where the (SCSI) LOADPARM + * is invalid in the SCSI IPL parameter block, so take it + * always from sclp_ipl_info. + */ + memcpy(reipl_block_fcp->fcp.loadparm, sclp_ipl_info.loadparm, + LOADPARM_LEN); + } else { + reipl_block_fcp->hdr.len = IPL_BP_FCP_LEN; + reipl_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION; + reipl_block_fcp->fcp.len = IPL_BP0_FCP_LEN; + reipl_block_fcp->fcp.pbt = IPL_PBT_FCP; + reipl_block_fcp->fcp.opt = IPL_PB0_FCP_OPT_IPL; + } + reipl_capabilities |= IPL_TYPE_FCP; + return 0; + +out2: + sysfs_remove_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group); +out1: + kset_unregister(reipl_fcp_kset); + free_page((unsigned long) reipl_block_fcp); + return rc; +} + +static int __init reipl_nvme_init(void) +{ + int rc; + + reipl_block_nvme = (void *) get_zeroed_page(GFP_KERNEL); + if (!reipl_block_nvme) + return -ENOMEM; + + /* sysfs: create kset for mixing attr group and bin attrs */ + reipl_nvme_kset = kset_create_and_add(IPL_NVME_STR, NULL, + &reipl_kset->kobj); + if (!reipl_nvme_kset) { + free_page((unsigned long) reipl_block_nvme); + return -ENOMEM; + } + + rc = sysfs_create_group(&reipl_nvme_kset->kobj, &reipl_nvme_attr_group); + if (rc) + goto out1; + + if (test_facility(141)) { + rc = sysfs_create_file(&reipl_nvme_kset->kobj, + &sys_reipl_nvme_clear_attr.attr); + if (rc) + goto out2; + } else { + reipl_nvme_clear = true; + } + + if (ipl_info.type == IPL_TYPE_NVME) { + memcpy(reipl_block_nvme, &ipl_block, sizeof(ipl_block)); + /* + * Fix loadparm: There are systems where the (SCSI) LOADPARM + * is invalid in the IPL parameter block, so take it + * always from sclp_ipl_info. + */ + memcpy(reipl_block_nvme->nvme.loadparm, sclp_ipl_info.loadparm, + LOADPARM_LEN); + } else { + reipl_block_nvme->hdr.len = IPL_BP_NVME_LEN; + reipl_block_nvme->hdr.version = IPL_PARM_BLOCK_VERSION; + reipl_block_nvme->nvme.len = IPL_BP0_NVME_LEN; + reipl_block_nvme->nvme.pbt = IPL_PBT_NVME; + reipl_block_nvme->nvme.opt = IPL_PB0_NVME_OPT_IPL; + } + reipl_capabilities |= IPL_TYPE_NVME; + return 0; + +out2: + sysfs_remove_group(&reipl_nvme_kset->kobj, &reipl_nvme_attr_group); +out1: + kset_unregister(reipl_nvme_kset); + free_page((unsigned long) reipl_block_nvme); + return rc; +} + +static int __init reipl_eckd_init(void) +{ + int rc; + + if (!sclp.has_sipl_eckd) + return 0; + + reipl_block_eckd = (void *)get_zeroed_page(GFP_KERNEL); + if (!reipl_block_eckd) + return -ENOMEM; + + /* sysfs: create kset for mixing attr group and bin attrs */ + reipl_eckd_kset = kset_create_and_add(IPL_ECKD_STR, NULL, + &reipl_kset->kobj); + if (!reipl_eckd_kset) { + free_page((unsigned long)reipl_block_eckd); + return -ENOMEM; + } + + rc = sysfs_create_group(&reipl_eckd_kset->kobj, &reipl_eckd_attr_group); + if (rc) + goto out1; + + if (test_facility(141)) { + rc = sysfs_create_file(&reipl_eckd_kset->kobj, + &sys_reipl_eckd_clear_attr.attr); + if (rc) + goto out2; + } else { + reipl_eckd_clear = true; + } + + if (ipl_info.type == IPL_TYPE_ECKD) { + memcpy(reipl_block_eckd, &ipl_block, sizeof(ipl_block)); + } else { + reipl_block_eckd->hdr.len = IPL_BP_ECKD_LEN; + reipl_block_eckd->hdr.version = IPL_PARM_BLOCK_VERSION; + reipl_block_eckd->eckd.len = IPL_BP0_ECKD_LEN; + reipl_block_eckd->eckd.pbt = IPL_PBT_ECKD; + reipl_block_eckd->eckd.opt = IPL_PB0_ECKD_OPT_IPL; + } + reipl_capabilities |= IPL_TYPE_ECKD; + return 0; + +out2: + sysfs_remove_group(&reipl_eckd_kset->kobj, &reipl_eckd_attr_group); +out1: + kset_unregister(reipl_eckd_kset); + free_page((unsigned long)reipl_block_eckd); + return rc; +} + +static int __init reipl_type_init(void) +{ + enum ipl_type reipl_type = ipl_info.type; + struct ipl_parameter_block *reipl_block; + unsigned long size; + + reipl_block = os_info_old_entry(OS_INFO_REIPL_BLOCK, &size); + if (!reipl_block) + goto out; + /* + * If we have an OS info reipl block, this will be used + */ + if (reipl_block->pb0_hdr.pbt == IPL_PBT_FCP) { + memcpy(reipl_block_fcp, reipl_block, size); + reipl_type = IPL_TYPE_FCP; + } else if (reipl_block->pb0_hdr.pbt == IPL_PBT_NVME) { + memcpy(reipl_block_nvme, reipl_block, size); + reipl_type = IPL_TYPE_NVME; + } else if (reipl_block->pb0_hdr.pbt == IPL_PBT_CCW) { + memcpy(reipl_block_ccw, reipl_block, size); + reipl_type = IPL_TYPE_CCW; + } else if (reipl_block->pb0_hdr.pbt == IPL_PBT_ECKD) { + memcpy(reipl_block_eckd, reipl_block, size); + reipl_type = IPL_TYPE_ECKD; + } +out: + return reipl_set_type(reipl_type); +} + +static int __init reipl_init(void) +{ + int rc; + + reipl_kset = kset_create_and_add("reipl", NULL, firmware_kobj); + if (!reipl_kset) + return -ENOMEM; + rc = sysfs_create_file(&reipl_kset->kobj, &reipl_type_attr.attr); + if (rc) { + kset_unregister(reipl_kset); + return rc; + } + rc = reipl_ccw_init(); + if (rc) + return rc; + rc = reipl_eckd_init(); + if (rc) + return rc; + rc = reipl_fcp_init(); + if (rc) + return rc; + rc = reipl_nvme_init(); + if (rc) + return rc; + rc = reipl_nss_init(); + if (rc) + return rc; + return reipl_type_init(); +} + +static struct shutdown_action __refdata reipl_action = { + .name = SHUTDOWN_ACTION_REIPL_STR, + .fn = reipl_run, + .init = reipl_init, +}; + +/* + * dump shutdown action: Dump Linux on shutdown. + */ + +/* FCP dump device attributes */ + +DEFINE_IPL_ATTR_RW(dump_fcp, wwpn, "0x%016llx\n", "%llx\n", + dump_block_fcp->fcp.wwpn); +DEFINE_IPL_ATTR_RW(dump_fcp, lun, "0x%016llx\n", "%llx\n", + dump_block_fcp->fcp.lun); +DEFINE_IPL_ATTR_RW(dump_fcp, bootprog, "%lld\n", "%lld\n", + dump_block_fcp->fcp.bootprog); +DEFINE_IPL_ATTR_RW(dump_fcp, br_lba, "%lld\n", "%lld\n", + dump_block_fcp->fcp.br_lba); +DEFINE_IPL_ATTR_RW(dump_fcp, device, "0.0.%04llx\n", "0.0.%llx\n", + dump_block_fcp->fcp.devno); + +static struct attribute *dump_fcp_attrs[] = { + &sys_dump_fcp_device_attr.attr, + &sys_dump_fcp_wwpn_attr.attr, + &sys_dump_fcp_lun_attr.attr, + &sys_dump_fcp_bootprog_attr.attr, + &sys_dump_fcp_br_lba_attr.attr, + NULL, +}; + +static struct attribute_group dump_fcp_attr_group = { + .name = IPL_FCP_STR, + .attrs = dump_fcp_attrs, +}; + +/* NVME dump device attributes */ +DEFINE_IPL_ATTR_RW(dump_nvme, fid, "0x%08llx\n", "%llx\n", + dump_block_nvme->nvme.fid); +DEFINE_IPL_ATTR_RW(dump_nvme, nsid, "0x%08llx\n", "%llx\n", + dump_block_nvme->nvme.nsid); +DEFINE_IPL_ATTR_RW(dump_nvme, bootprog, "%lld\n", "%llx\n", + dump_block_nvme->nvme.bootprog); +DEFINE_IPL_ATTR_RW(dump_nvme, br_lba, "%lld\n", "%llx\n", + dump_block_nvme->nvme.br_lba); + +static struct attribute *dump_nvme_attrs[] = { + &sys_dump_nvme_fid_attr.attr, + &sys_dump_nvme_nsid_attr.attr, + &sys_dump_nvme_bootprog_attr.attr, + &sys_dump_nvme_br_lba_attr.attr, + NULL, +}; + +static struct attribute_group dump_nvme_attr_group = { + .name = IPL_NVME_STR, + .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, 0644, 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); + +static struct attribute *dump_ccw_attrs[] = { + &sys_dump_ccw_device_attr.attr, + NULL, +}; + +static struct attribute_group dump_ccw_attr_group = { + .name = IPL_CCW_STR, + .attrs = dump_ccw_attrs, +}; + +/* dump type */ + +static int dump_set_type(enum dump_type type) +{ + if (!(dump_capabilities & type)) + return -EINVAL; + dump_type = type; + return 0; +} + +static ssize_t dump_type_show(struct kobject *kobj, + struct kobj_attribute *attr, char *page) +{ + return sprintf(page, "%s\n", dump_type_str(dump_type)); +} + +static ssize_t dump_type_store(struct kobject *kobj, + struct kobj_attribute *attr, + const char *buf, size_t len) +{ + int rc = -EINVAL; + + if (strncmp(buf, DUMP_NONE_STR, strlen(DUMP_NONE_STR)) == 0) + 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) + rc = dump_set_type(DUMP_TYPE_NVME); + return (rc != 0) ? rc : len; +} + +static struct kobj_attribute dump_type_attr = + __ATTR(dump_type, 0644, dump_type_show, dump_type_store); + +static struct kset *dump_kset; + +static void diag308_dump(void *dump_block) +{ + diag308(DIAG308_SET, dump_block); + while (1) { + if (diag308(DIAG308_LOAD_NORMAL_DUMP, NULL) != 0x302) + break; + udelay(USEC_PER_SEC); + } +} + +static void __dump_run(void *unused) +{ + switch (dump_type) { + 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; + case DUMP_TYPE_NVME: + diag308_dump(dump_block_nvme); + break; + default: + break; + } +} + +static void dump_run(struct shutdown_trigger *trigger) +{ + if (dump_type == DUMP_TYPE_NONE) + return; + smp_send_stop(); + smp_call_ipl_cpu(__dump_run, NULL); +} + +static int __init dump_ccw_init(void) +{ + int rc; + + dump_block_ccw = (void *) get_zeroed_page(GFP_KERNEL); + if (!dump_block_ccw) + return -ENOMEM; + rc = sysfs_create_group(&dump_kset->kobj, &dump_ccw_attr_group); + if (rc) { + free_page((unsigned long)dump_block_ccw); + return rc; + } + dump_block_ccw->hdr.len = IPL_BP_CCW_LEN; + dump_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION; + dump_block_ccw->ccw.len = IPL_BP0_CCW_LEN; + dump_block_ccw->ccw.pbt = IPL_PBT_CCW; + dump_capabilities |= DUMP_TYPE_CCW; + return 0; +} + +static int __init dump_fcp_init(void) +{ + int rc; + + if (!sclp_ipl_info.has_dump) + return 0; /* LDIPL DUMP is not installed */ + dump_block_fcp = (void *) get_zeroed_page(GFP_KERNEL); + if (!dump_block_fcp) + return -ENOMEM; + rc = sysfs_create_group(&dump_kset->kobj, &dump_fcp_attr_group); + if (rc) { + free_page((unsigned long)dump_block_fcp); + return rc; + } + dump_block_fcp->hdr.len = IPL_BP_FCP_LEN; + dump_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION; + dump_block_fcp->fcp.len = IPL_BP0_FCP_LEN; + dump_block_fcp->fcp.pbt = IPL_PBT_FCP; + dump_block_fcp->fcp.opt = IPL_PB0_FCP_OPT_DUMP; + dump_capabilities |= DUMP_TYPE_FCP; + return 0; +} + +static int __init dump_nvme_init(void) +{ + int rc; + + if (!sclp_ipl_info.has_dump) + return 0; /* LDIPL DUMP is not installed */ + dump_block_nvme = (void *) get_zeroed_page(GFP_KERNEL); + if (!dump_block_nvme) + return -ENOMEM; + rc = sysfs_create_group(&dump_kset->kobj, &dump_nvme_attr_group); + if (rc) { + free_page((unsigned long)dump_block_nvme); + return rc; + } + dump_block_nvme->hdr.len = IPL_BP_NVME_LEN; + dump_block_nvme->hdr.version = IPL_PARM_BLOCK_VERSION; + dump_block_nvme->fcp.len = IPL_BP0_NVME_LEN; + dump_block_nvme->fcp.pbt = IPL_PBT_NVME; + dump_block_nvme->fcp.opt = IPL_PB0_NVME_OPT_DUMP; + dump_capabilities |= DUMP_TYPE_NVME; + 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; + + dump_kset = kset_create_and_add("dump", NULL, firmware_kobj); + if (!dump_kset) + return -ENOMEM; + rc = sysfs_create_file(&dump_kset->kobj, &dump_type_attr.attr); + if (rc) { + kset_unregister(dump_kset); + return rc; + } + rc = dump_ccw_init(); + if (rc) + return rc; + rc = dump_eckd_init(); + if (rc) + return rc; + rc = dump_fcp_init(); + if (rc) + return rc; + rc = dump_nvme_init(); + if (rc) + return rc; + dump_set_type(DUMP_TYPE_NONE); + return 0; +} + +static struct shutdown_action __refdata dump_action = { + .name = SHUTDOWN_ACTION_DUMP_STR, + .fn = dump_run, + .init = dump_init, +}; + +static void dump_reipl_run(struct shutdown_trigger *trigger) +{ + struct lowcore *abs_lc; + unsigned int csum; + + /* + * Set REIPL_CLEAR flag in os_info flags entry indicating + * 'clear' sysfs attribute has been set on the panicked system + * for specified reipl type. + * Always set for IPL_TYPE_NSS and IPL_TYPE_UNKNOWN. + */ + if ((reipl_type == IPL_TYPE_CCW && reipl_ccw_clear) || + (reipl_type == IPL_TYPE_ECKD && reipl_eckd_clear) || + (reipl_type == IPL_TYPE_FCP && reipl_fcp_clear) || + (reipl_type == IPL_TYPE_NVME && reipl_nvme_clear) || + reipl_type == IPL_TYPE_NSS || + reipl_type == IPL_TYPE_UNKNOWN) + os_info_flags |= OS_INFO_FLAG_REIPL_CLEAR; + os_info_entry_add(OS_INFO_FLAGS_ENTRY, &os_info_flags, sizeof(os_info_flags)); + csum = (__force unsigned int) + csum_partial(reipl_block_actual, reipl_block_actual->hdr.len, 0); + abs_lc = get_abs_lowcore(); + abs_lc->ipib = __pa(reipl_block_actual); + abs_lc->ipib_checksum = csum; + put_abs_lowcore(abs_lc); + dump_run(trigger); +} + +static struct shutdown_action __refdata dump_reipl_action = { + .name = SHUTDOWN_ACTION_DUMP_REIPL_STR, + .fn = dump_reipl_run, +}; + +/* + * vmcmd shutdown action: Trigger vm command on shutdown. + */ + +static char vmcmd_on_reboot[128]; +static char vmcmd_on_panic[128]; +static char vmcmd_on_halt[128]; +static char vmcmd_on_poff[128]; +static char vmcmd_on_restart[128]; + +DEFINE_IPL_ATTR_STR_RW(vmcmd, on_reboot, "%s\n", "%s\n", vmcmd_on_reboot); +DEFINE_IPL_ATTR_STR_RW(vmcmd, on_panic, "%s\n", "%s\n", vmcmd_on_panic); +DEFINE_IPL_ATTR_STR_RW(vmcmd, on_halt, "%s\n", "%s\n", vmcmd_on_halt); +DEFINE_IPL_ATTR_STR_RW(vmcmd, on_poff, "%s\n", "%s\n", vmcmd_on_poff); +DEFINE_IPL_ATTR_STR_RW(vmcmd, on_restart, "%s\n", "%s\n", vmcmd_on_restart); + +static struct attribute *vmcmd_attrs[] = { + &sys_vmcmd_on_reboot_attr.attr, + &sys_vmcmd_on_panic_attr.attr, + &sys_vmcmd_on_halt_attr.attr, + &sys_vmcmd_on_poff_attr.attr, + &sys_vmcmd_on_restart_attr.attr, + NULL, +}; + +static struct attribute_group vmcmd_attr_group = { + .attrs = vmcmd_attrs, +}; + +static struct kset *vmcmd_kset; + +static void vmcmd_run(struct shutdown_trigger *trigger) +{ + char *cmd; + + if (strcmp(trigger->name, ON_REIPL_STR) == 0) + cmd = vmcmd_on_reboot; + else if (strcmp(trigger->name, ON_PANIC_STR) == 0) + cmd = vmcmd_on_panic; + else if (strcmp(trigger->name, ON_HALT_STR) == 0) + cmd = vmcmd_on_halt; + else if (strcmp(trigger->name, ON_POFF_STR) == 0) + cmd = vmcmd_on_poff; + else if (strcmp(trigger->name, ON_RESTART_STR) == 0) + cmd = vmcmd_on_restart; + else + return; + + if (strlen(cmd) == 0) + return; + __cpcmd(cmd, NULL, 0, NULL); +} + +static int vmcmd_init(void) +{ + if (!MACHINE_IS_VM) + return -EOPNOTSUPP; + vmcmd_kset = kset_create_and_add("vmcmd", NULL, firmware_kobj); + if (!vmcmd_kset) + return -ENOMEM; + return sysfs_create_group(&vmcmd_kset->kobj, &vmcmd_attr_group); +} + +static struct shutdown_action vmcmd_action = {SHUTDOWN_ACTION_VMCMD_STR, + vmcmd_run, vmcmd_init}; + +/* + * stop shutdown action: Stop Linux on shutdown. + */ + +static void stop_run(struct shutdown_trigger *trigger) +{ + if (strcmp(trigger->name, ON_PANIC_STR) == 0 || + strcmp(trigger->name, ON_RESTART_STR) == 0) + disabled_wait(); + smp_stop_cpu(); +} + +static struct shutdown_action stop_action = {SHUTDOWN_ACTION_STOP_STR, + stop_run, NULL}; + +/* action list */ + +static struct shutdown_action *shutdown_actions_list[] = { + &ipl_action, &reipl_action, &dump_reipl_action, &dump_action, + &vmcmd_action, &stop_action}; +#define SHUTDOWN_ACTIONS_COUNT (sizeof(shutdown_actions_list) / sizeof(void *)) + +/* + * Trigger section + */ + +static struct kset *shutdown_actions_kset; + +static int set_trigger(const char *buf, struct shutdown_trigger *trigger, + size_t len) +{ + int i; + + for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) { + if (sysfs_streq(buf, shutdown_actions_list[i]->name)) { + if (shutdown_actions_list[i]->init_rc) { + return shutdown_actions_list[i]->init_rc; + } else { + trigger->action = shutdown_actions_list[i]; + return len; + } + } + } + return -EINVAL; +} + +/* on reipl */ + +static struct shutdown_trigger on_reboot_trigger = {ON_REIPL_STR, + &reipl_action}; + +static ssize_t on_reboot_show(struct kobject *kobj, + struct kobj_attribute *attr, char *page) +{ + return sprintf(page, "%s\n", on_reboot_trigger.action->name); +} + +static ssize_t on_reboot_store(struct kobject *kobj, + struct kobj_attribute *attr, + const char *buf, size_t len) +{ + return set_trigger(buf, &on_reboot_trigger, len); +} +static struct kobj_attribute on_reboot_attr = __ATTR_RW(on_reboot); + +static void do_machine_restart(char *__unused) +{ + smp_send_stop(); + on_reboot_trigger.action->fn(&on_reboot_trigger); + reipl_run(NULL); +} +void (*_machine_restart)(char *command) = do_machine_restart; + +/* on panic */ + +static struct shutdown_trigger on_panic_trigger = {ON_PANIC_STR, &stop_action}; + +static ssize_t on_panic_show(struct kobject *kobj, + struct kobj_attribute *attr, char *page) +{ + return sprintf(page, "%s\n", on_panic_trigger.action->name); +} + +static ssize_t on_panic_store(struct kobject *kobj, + struct kobj_attribute *attr, + const char *buf, size_t len) +{ + return set_trigger(buf, &on_panic_trigger, len); +} +static struct kobj_attribute on_panic_attr = __ATTR_RW(on_panic); + +static void do_panic(void) +{ + lgr_info_log(); + on_panic_trigger.action->fn(&on_panic_trigger); + stop_run(&on_panic_trigger); +} + +/* on restart */ + +static struct shutdown_trigger on_restart_trigger = {ON_RESTART_STR, + &stop_action}; + +static ssize_t on_restart_show(struct kobject *kobj, + struct kobj_attribute *attr, char *page) +{ + return sprintf(page, "%s\n", on_restart_trigger.action->name); +} + +static ssize_t on_restart_store(struct kobject *kobj, + struct kobj_attribute *attr, + const char *buf, size_t len) +{ + return set_trigger(buf, &on_restart_trigger, len); +} +static struct kobj_attribute on_restart_attr = __ATTR_RW(on_restart); + +static void __do_restart(void *ignore) +{ + smp_send_stop(); +#ifdef CONFIG_CRASH_DUMP + crash_kexec(NULL); +#endif + on_restart_trigger.action->fn(&on_restart_trigger); + stop_run(&on_restart_trigger); +} + +void do_restart(void *arg) +{ + tracing_off(); + debug_locks_off(); + lgr_info_log(); + smp_call_online_cpu(__do_restart, arg); +} + +/* on halt */ + +static struct shutdown_trigger on_halt_trigger = {ON_HALT_STR, &stop_action}; + +static ssize_t on_halt_show(struct kobject *kobj, + struct kobj_attribute *attr, char *page) +{ + return sprintf(page, "%s\n", on_halt_trigger.action->name); +} + +static ssize_t on_halt_store(struct kobject *kobj, + struct kobj_attribute *attr, + const char *buf, size_t len) +{ + return set_trigger(buf, &on_halt_trigger, len); +} +static struct kobj_attribute on_halt_attr = __ATTR_RW(on_halt); + +static void do_machine_halt(void) +{ + smp_send_stop(); + on_halt_trigger.action->fn(&on_halt_trigger); + stop_run(&on_halt_trigger); +} +void (*_machine_halt)(void) = do_machine_halt; + +/* on power off */ + +static struct shutdown_trigger on_poff_trigger = {ON_POFF_STR, &stop_action}; + +static ssize_t on_poff_show(struct kobject *kobj, + struct kobj_attribute *attr, char *page) +{ + return sprintf(page, "%s\n", on_poff_trigger.action->name); +} + +static ssize_t on_poff_store(struct kobject *kobj, + struct kobj_attribute *attr, + const char *buf, size_t len) +{ + return set_trigger(buf, &on_poff_trigger, len); +} +static struct kobj_attribute on_poff_attr = __ATTR_RW(on_poff); + +static void do_machine_power_off(void) +{ + smp_send_stop(); + on_poff_trigger.action->fn(&on_poff_trigger); + stop_run(&on_poff_trigger); +} +void (*_machine_power_off)(void) = do_machine_power_off; + +static struct attribute *shutdown_action_attrs[] = { + &on_restart_attr.attr, + &on_reboot_attr.attr, + &on_panic_attr.attr, + &on_halt_attr.attr, + &on_poff_attr.attr, + NULL, +}; + +static struct attribute_group shutdown_action_attr_group = { + .attrs = shutdown_action_attrs, +}; + +static void __init shutdown_triggers_init(void) +{ + shutdown_actions_kset = kset_create_and_add("shutdown_actions", NULL, + firmware_kobj); + if (!shutdown_actions_kset) + goto fail; + if (sysfs_create_group(&shutdown_actions_kset->kobj, + &shutdown_action_attr_group)) + goto fail; + return; +fail: + panic("shutdown_triggers_init failed\n"); +} + +static void __init shutdown_actions_init(void) +{ + int i; + + for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) { + if (!shutdown_actions_list[i]->init) + continue; + shutdown_actions_list[i]->init_rc = + shutdown_actions_list[i]->init(); + } +} + +static int __init s390_ipl_init(void) +{ + char str[8] = {0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40}; + + sclp_early_get_ipl_info(&sclp_ipl_info); + /* + * Fix loadparm: There are systems where the (SCSI) LOADPARM + * returned by read SCP info is invalid (contains EBCDIC blanks) + * when the system has been booted via diag308. In that case we use + * the value from diag308, if available. + * + * There are also systems where diag308 store does not work in + * case the system is booted from HMC. Fortunately in this case + * READ SCP info provides the correct value. + */ + if (memcmp(sclp_ipl_info.loadparm, str, sizeof(str)) == 0 && ipl_block_valid) + memcpy(sclp_ipl_info.loadparm, ipl_block.ccw.loadparm, LOADPARM_LEN); + shutdown_actions_init(); + shutdown_triggers_init(); + return 0; +} + +__initcall(s390_ipl_init); + +static void __init strncpy_skip_quote(char *dst, char *src, int n) +{ + int sx, dx; + + dx = 0; + for (sx = 0; src[sx] != 0; sx++) { + if (src[sx] == '"') + continue; + dst[dx++] = src[sx]; + if (dx >= n) + break; + } +} + +static int __init vmcmd_on_reboot_setup(char *str) +{ + if (!MACHINE_IS_VM) + return 1; + strncpy_skip_quote(vmcmd_on_reboot, str, 127); + vmcmd_on_reboot[127] = 0; + on_reboot_trigger.action = &vmcmd_action; + return 1; +} +__setup("vmreboot=", vmcmd_on_reboot_setup); + +static int __init vmcmd_on_panic_setup(char *str) +{ + if (!MACHINE_IS_VM) + return 1; + strncpy_skip_quote(vmcmd_on_panic, str, 127); + vmcmd_on_panic[127] = 0; + on_panic_trigger.action = &vmcmd_action; + return 1; +} +__setup("vmpanic=", vmcmd_on_panic_setup); + +static int __init vmcmd_on_halt_setup(char *str) +{ + if (!MACHINE_IS_VM) + return 1; + strncpy_skip_quote(vmcmd_on_halt, str, 127); + vmcmd_on_halt[127] = 0; + on_halt_trigger.action = &vmcmd_action; + return 1; +} +__setup("vmhalt=", vmcmd_on_halt_setup); + +static int __init vmcmd_on_poff_setup(char *str) +{ + if (!MACHINE_IS_VM) + return 1; + strncpy_skip_quote(vmcmd_on_poff, str, 127); + vmcmd_on_poff[127] = 0; + on_poff_trigger.action = &vmcmd_action; + return 1; +} +__setup("vmpoff=", vmcmd_on_poff_setup); + +static int on_panic_notify(struct notifier_block *self, + unsigned long event, void *data) +{ + do_panic(); + return NOTIFY_OK; +} + +static struct notifier_block on_panic_nb = { + .notifier_call = on_panic_notify, + .priority = INT_MIN, +}; + +void __init setup_ipl(void) +{ + BUILD_BUG_ON(sizeof(struct ipl_parameter_block) != PAGE_SIZE); + + ipl_info.type = get_ipl_type(); + switch (ipl_info.type) { + case IPL_TYPE_CCW: + ipl_info.data.ccw.dev_id.ssid = ipl_block.ccw.ssid; + 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; + case IPL_TYPE_FCP: + case IPL_TYPE_FCP_DUMP: + ipl_info.data.fcp.dev_id.ssid = 0; + ipl_info.data.fcp.dev_id.devno = ipl_block.fcp.devno; + ipl_info.data.fcp.wwpn = ipl_block.fcp.wwpn; + ipl_info.data.fcp.lun = ipl_block.fcp.lun; + break; + case IPL_TYPE_NVME: + case IPL_TYPE_NVME_DUMP: + ipl_info.data.nvme.fid = ipl_block.nvme.fid; + ipl_info.data.nvme.nsid = ipl_block.nvme.nsid; + break; + case IPL_TYPE_NSS: + case IPL_TYPE_UNKNOWN: + /* We have no info to copy */ + break; + } + atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb); +} + +void s390_reset_system(void) +{ + /* Disable prefixing */ + set_prefix(0); + + /* Disable lowcore protection */ + __ctl_clear_bit(0, 28); + diag_amode31_ops.diag308_reset(); +} + +#ifdef CONFIG_KEXEC_FILE + +int ipl_report_add_component(struct ipl_report *report, struct kexec_buf *kbuf, + unsigned char flags, unsigned short cert) +{ + struct ipl_report_component *comp; + + comp = vzalloc(sizeof(*comp)); + if (!comp) + return -ENOMEM; + list_add_tail(&comp->list, &report->components); + + comp->entry.addr = kbuf->mem; + comp->entry.len = kbuf->memsz; + comp->entry.flags = flags; + comp->entry.certificate_index = cert; + + report->size += sizeof(comp->entry); + + return 0; +} + +int ipl_report_add_certificate(struct ipl_report *report, void *key, + unsigned long addr, unsigned long len) +{ + struct ipl_report_certificate *cert; + + cert = vzalloc(sizeof(*cert)); + if (!cert) + return -ENOMEM; + list_add_tail(&cert->list, &report->certificates); + + cert->entry.addr = addr; + cert->entry.len = len; + cert->key = key; + + report->size += sizeof(cert->entry); + report->size += cert->entry.len; + + return 0; +} + +struct ipl_report *ipl_report_init(struct ipl_parameter_block *ipib) +{ + struct ipl_report *report; + + report = vzalloc(sizeof(*report)); + if (!report) + return ERR_PTR(-ENOMEM); + + report->ipib = ipib; + INIT_LIST_HEAD(&report->components); + INIT_LIST_HEAD(&report->certificates); + + report->size = ALIGN(ipib->hdr.len, 8); + report->size += sizeof(struct ipl_rl_hdr); + report->size += sizeof(struct ipl_rb_components); + report->size += sizeof(struct ipl_rb_certificates); + + return report; +} + +void *ipl_report_finish(struct ipl_report *report) +{ + struct ipl_report_certificate *cert; + struct ipl_report_component *comp; + struct ipl_rb_certificates *certs; + struct ipl_parameter_block *ipib; + struct ipl_rb_components *comps; + struct ipl_rl_hdr *rl_hdr; + void *buf, *ptr; + + buf = vzalloc(report->size); + if (!buf) + goto out; + ptr = buf; + + memcpy(ptr, report->ipib, report->ipib->hdr.len); + ipib = ptr; + if (ipl_secure_flag) + ipib->hdr.flags |= IPL_PL_FLAG_SIPL; + ipib->hdr.flags |= IPL_PL_FLAG_IPLSR; + ptr += report->ipib->hdr.len; + ptr = PTR_ALIGN(ptr, 8); + + rl_hdr = ptr; + ptr += sizeof(*rl_hdr); + + comps = ptr; + comps->rbt = IPL_RBT_COMPONENTS; + ptr += sizeof(*comps); + list_for_each_entry(comp, &report->components, list) { + memcpy(ptr, &comp->entry, sizeof(comp->entry)); + ptr += sizeof(comp->entry); + } + comps->len = ptr - (void *)comps; + + certs = ptr; + certs->rbt = IPL_RBT_CERTIFICATES; + ptr += sizeof(*certs); + list_for_each_entry(cert, &report->certificates, list) { + memcpy(ptr, &cert->entry, sizeof(cert->entry)); + ptr += sizeof(cert->entry); + } + certs->len = ptr - (void *)certs; + rl_hdr->len = ptr - (void *)rl_hdr; + + list_for_each_entry(cert, &report->certificates, list) { + memcpy(ptr, cert->key, cert->entry.len); + ptr += cert->entry.len; + } + + BUG_ON(ptr > buf + report->size); +out: + return buf; +} + +int ipl_report_free(struct ipl_report *report) +{ + struct ipl_report_component *comp, *ncomp; + struct ipl_report_certificate *cert, *ncert; + + list_for_each_entry_safe(comp, ncomp, &report->components, list) + vfree(comp); + + list_for_each_entry_safe(cert, ncert, &report->certificates, list) + vfree(cert); + + vfree(report); + + return 0; +} + +#endif -- cgit v1.2.3