cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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ipl.h (3798B)

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