ipl.h

  1/* SPDX-License-Identifier: GPL-2.0 */
  2/*
  3 * s390 (re)ipl support
  4 *
  5 * Copyright IBM Corp. 2007
  6 */
  7
  8#ifndef _ASM_S390_IPL_H
  9#define _ASM_S390_IPL_H
 10
 11#include <asm/lowcore.h>
 12#include <asm/types.h>
 13#include <asm/cio.h>
 14#include <asm/setup.h>
 15#include <asm/page.h>
 16#include <uapi/asm/ipl.h>
 17
 18struct ipl_parameter_block {
 19	struct ipl_pl_hdr hdr;
 20	union {
 21		struct ipl_pb_hdr pb0_hdr;
 22		struct ipl_pb0_common common;
 23		struct ipl_pb0_fcp fcp;
 24		struct ipl_pb0_ccw ccw;
 25		struct ipl_pb0_eckd eckd;
 26		struct ipl_pb0_nvme nvme;
 27		char raw[PAGE_SIZE - sizeof(struct ipl_pl_hdr)];
 28	};
 29} __packed __aligned(PAGE_SIZE);
 30
 31#define NSS_NAME_SIZE 8
 32
 33#define IPL_BP_FCP_LEN (sizeof(struct ipl_pl_hdr) + \
 34			      sizeof(struct ipl_pb0_fcp))
 35#define IPL_BP0_FCP_LEN (sizeof(struct ipl_pb0_fcp))
 36
 37#define IPL_BP_NVME_LEN (sizeof(struct ipl_pl_hdr) + \
 38			      sizeof(struct ipl_pb0_nvme))
 39#define IPL_BP0_NVME_LEN (sizeof(struct ipl_pb0_nvme))
 40
 41#define IPL_BP_CCW_LEN (sizeof(struct ipl_pl_hdr) + \
 42			      sizeof(struct ipl_pb0_ccw))
 43#define IPL_BP0_CCW_LEN (sizeof(struct ipl_pb0_ccw))
 44
 45#define IPL_BP_ECKD_LEN (sizeof(struct ipl_pl_hdr) + \
 46			      sizeof(struct ipl_pb0_eckd))
 47#define IPL_BP0_ECKD_LEN (sizeof(struct ipl_pb0_eckd))
 48
 49#define IPL_MAX_SUPPORTED_VERSION (0)
 50
 51#define IPL_RB_CERT_UNKNOWN ((unsigned short)-1)
 52
 53#define DIAG308_VMPARM_SIZE (64)
 54#define DIAG308_SCPDATA_OFFSET offsetof(struct ipl_parameter_block, \
 55					fcp.scp_data)
 56#define DIAG308_SCPDATA_SIZE (PAGE_SIZE - DIAG308_SCPDATA_OFFSET)
 57
 58struct save_area;
 59struct save_area * __init save_area_alloc(bool is_boot_cpu);
 60struct save_area * __init save_area_boot_cpu(void);
 61void __init save_area_add_regs(struct save_area *, void *regs);
 62void __init save_area_add_vxrs(struct save_area *, __vector128 *vxrs);
 63
 64extern void s390_reset_system(void);
 65extern size_t ipl_block_get_ascii_vmparm(char *dest, size_t size,
 66					 const struct ipl_parameter_block *ipb);
 67
 68enum ipl_type {
 69	IPL_TYPE_UNKNOWN	= 1,
 70	IPL_TYPE_CCW		= 2,
 71	IPL_TYPE_FCP		= 4,
 72	IPL_TYPE_FCP_DUMP	= 8,
 73	IPL_TYPE_NSS		= 16,
 74	IPL_TYPE_NVME		= 32,
 75	IPL_TYPE_NVME_DUMP	= 64,
 76	IPL_TYPE_ECKD		= 128,
 77	IPL_TYPE_ECKD_DUMP	= 256,
 78};
 79
 80struct ipl_info
 81{
 82	enum ipl_type type;
 83	union {
 84		struct {
 85			struct ccw_dev_id dev_id;
 86		} ccw;
 87		struct {
 88			struct ccw_dev_id dev_id;
 89		} eckd;
 90		struct {
 91			struct ccw_dev_id dev_id;
 92			u64 wwpn;
 93			u64 lun;
 94		} fcp;
 95		struct {
 96			u32 fid;
 97			u32 nsid;
 98		} nvme;
 99		struct {
100			char name[NSS_NAME_SIZE + 1];
101		} nss;
102	} data;
103};
104
105extern struct ipl_info ipl_info;
106extern void setup_ipl(void);
107extern void set_os_info_reipl_block(void);
108
109static inline bool is_ipl_type_dump(void)
110{
111	return (ipl_info.type == IPL_TYPE_FCP_DUMP) ||
112		(ipl_info.type == IPL_TYPE_ECKD_DUMP) ||
113		(ipl_info.type == IPL_TYPE_NVME_DUMP);
114}
115
116struct ipl_report {
117	struct ipl_parameter_block *ipib;
118	struct list_head components;
119	struct list_head certificates;
120	size_t size;
121};
122
123struct ipl_report_component {
124	struct list_head list;
125	struct ipl_rb_component_entry entry;
126};
127
128struct ipl_report_certificate {
129	struct list_head list;
130	struct ipl_rb_certificate_entry entry;
131	void *key;
132};
133
134struct kexec_buf;
135struct ipl_report *ipl_report_init(struct ipl_parameter_block *ipib);
136void *ipl_report_finish(struct ipl_report *report);
137int ipl_report_free(struct ipl_report *report);
138int ipl_report_add_component(struct ipl_report *report, struct kexec_buf *kbuf,
139			     unsigned char flags, unsigned short cert);
140int ipl_report_add_certificate(struct ipl_report *report, void *key,
141			       unsigned long addr, unsigned long len);
142
143/*
144 * DIAG 308 support
145 */
146enum diag308_subcode  {
147	DIAG308_CLEAR_RESET = 0,
148	DIAG308_LOAD_NORMAL_RESET = 1,
149	DIAG308_REL_HSA = 2,
150	DIAG308_LOAD_CLEAR = 3,
151	DIAG308_LOAD_NORMAL_DUMP = 4,
152	DIAG308_SET = 5,
153	DIAG308_STORE = 6,
154	DIAG308_LOAD_NORMAL = 7,
155};
156
157enum diag308_subcode_flags {
158	DIAG308_FLAG_EI = 1UL << 16,
159};
160
161enum diag308_rc {
162	DIAG308_RC_OK		= 0x0001,
163	DIAG308_RC_NOCONFIG	= 0x0102,
164};
165
166extern int diag308(unsigned long subcode, void *addr);
167extern void store_status(void (*fn)(void *), void *data);
168extern void lgr_info_log(void);
169
170#endif /* _ASM_S390_IPL_H */