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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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The IPL parameter block is used as an interface between Linux and the machine to query and change the boot device and boot options. To be able to create IPL parameter block in user space and pass it as segment to kexec provide an uapi header with proper structure definitions for the block. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
106 lines
2.4 KiB
C
106 lines
2.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* s390 (re)ipl support
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*
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* Copyright IBM Corp. 2007
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*/
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#ifndef _ASM_S390_IPL_H
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#define _ASM_S390_IPL_H
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#include <asm/lowcore.h>
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#include <asm/types.h>
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#include <asm/cio.h>
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#include <asm/setup.h>
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#include <uapi/asm/ipl.h>
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struct ipl_parameter_block {
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struct ipl_pl_hdr hdr;
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union {
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struct ipl_pb_hdr pb0_hdr;
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struct ipl_pb0_common common;
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struct ipl_pb0_fcp fcp;
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struct ipl_pb0_ccw ccw;
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char raw[PAGE_SIZE - sizeof(struct ipl_pl_hdr)];
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};
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} __packed __aligned(PAGE_SIZE);
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#define NSS_NAME_SIZE 8
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#define IPL_BP_FCP_LEN (sizeof(struct ipl_pl_hdr) + \
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sizeof(struct ipl_pb0_fcp))
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#define IPL_BP0_FCP_LEN (sizeof(struct ipl_pb0_fcp))
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#define IPL_BP_CCW_LEN (sizeof(struct ipl_pl_hdr) + \
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sizeof(struct ipl_pb0_ccw))
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#define IPL_BP0_CCW_LEN (sizeof(struct ipl_pb0_ccw))
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#define IPL_MAX_SUPPORTED_VERSION (0)
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#define DIAG308_VMPARM_SIZE (64)
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#define DIAG308_SCPDATA_OFFSET offsetof(struct ipl_parameter_block, \
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fcp.scp_data)
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#define DIAG308_SCPDATA_SIZE (PAGE_SIZE - DIAG308_SCPDATA_OFFSET)
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struct save_area;
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struct save_area * __init save_area_alloc(bool is_boot_cpu);
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struct save_area * __init save_area_boot_cpu(void);
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void __init save_area_add_regs(struct save_area *, void *regs);
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void __init save_area_add_vxrs(struct save_area *, __vector128 *vxrs);
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extern void s390_reset_system(void);
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extern size_t ipl_block_get_ascii_vmparm(char *dest, size_t size,
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const struct ipl_parameter_block *ipb);
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enum ipl_type {
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IPL_TYPE_UNKNOWN = 1,
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IPL_TYPE_CCW = 2,
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IPL_TYPE_FCP = 4,
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IPL_TYPE_FCP_DUMP = 8,
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IPL_TYPE_NSS = 16,
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};
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struct ipl_info
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{
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enum ipl_type type;
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union {
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struct {
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struct ccw_dev_id dev_id;
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} ccw;
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struct {
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struct ccw_dev_id dev_id;
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u64 wwpn;
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u64 lun;
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} fcp;
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struct {
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char name[NSS_NAME_SIZE + 1];
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} nss;
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} data;
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};
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extern struct ipl_info ipl_info;
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extern void setup_ipl(void);
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extern void set_os_info_reipl_block(void);
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/*
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* DIAG 308 support
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*/
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enum diag308_subcode {
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DIAG308_REL_HSA = 2,
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DIAG308_LOAD_CLEAR = 3,
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DIAG308_LOAD_NORMAL_DUMP = 4,
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DIAG308_SET = 5,
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DIAG308_STORE = 6,
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};
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enum diag308_rc {
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DIAG308_RC_OK = 0x0001,
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DIAG308_RC_NOCONFIG = 0x0102,
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};
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extern int diag308(unsigned long subcode, void *addr);
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extern void diag308_reset(void);
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extern void store_status(void (*fn)(void *), void *data);
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extern void lgr_info_log(void);
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#endif /* _ASM_S390_IPL_H */
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