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-rw-r--r--arch/s390/kernel/ipl.c2522
1 files changed, 2522 insertions, 0 deletions
diff --git a/arch/s390/kernel/ipl.c b/arch/s390/kernel/ipl.c
new file mode 100644
index 000000000..8d0b95c17
--- /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 <holzheu@de.ibm.com>
+ * Volker Sameske <sameske@de.ibm.com>
+ */
+
+#include <linux/types.h>
+#include <linux/export.h>
+#include <linux/init.h>
+#include <linux/device.h>
+#include <linux/delay.h>
+#include <linux/kstrtox.h>
+#include <linux/panic_notifier.h>
+#include <linux/reboot.h>
+#include <linux/ctype.h>
+#include <linux/fs.h>
+#include <linux/gfp.h>
+#include <linux/crash_dump.h>
+#include <linux/debug_locks.h>
+#include <asm/asm-extable.h>
+#include <asm/diag.h>
+#include <asm/ipl.h>
+#include <asm/smp.h>
+#include <asm/setup.h>
+#include <asm/cpcmd.h>
+#include <asm/ebcdic.h>
+#include <asm/sclp.h>
+#include <asm/checksum.h>
+#include <asm/debug.h>
+#include <asm/abs_lowcore.h>
+#include <asm/os_info.h>
+#include <asm/sections.h>
+#include <asm/boot_data.h>
+#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
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-08 18:26:44 +0000