arch/powerpc/include/asm/mce.h

   1 /*
   2  * Machine check exception header file.
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  17  *
  18  * Copyright 2013 IBM Corporation
  19  * Author: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com>
  20  */
  21
  22 #ifndef __ASM_PPC64_MCE_H__
  23 #define __ASM_PPC64_MCE_H__
  24
  25 #include <linux/bitops.h>
  26
  27 /*
  28  * Machine Check bits on power7 and power8
  29  */
  30 #define P7_SRR1_MC_LOADSTORE(srr1)      ((srr1) & PPC_BIT(42)) /* P8 too */
  31
  32 /* SRR1 bits for machine check (On Power7 and Power8) */
  33 #define P7_SRR1_MC_IFETCH(srr1) ((srr1) & PPC_BITMASK(43, 45)) /* P8 too */
  34
  35 #define P7_SRR1_MC_IFETCH_UE            (0x1 << PPC_BITLSHIFT(45)) /* P8 too */
  36 #define P7_SRR1_MC_IFETCH_SLB_PARITY    (0x2 << PPC_BITLSHIFT(45)) /* P8 too */
  37 #define P7_SRR1_MC_IFETCH_SLB_MULTIHIT  (0x3 << PPC_BITLSHIFT(45)) /* P8 too */
  38 #define P7_SRR1_MC_IFETCH_SLB_BOTH      (0x4 << PPC_BITLSHIFT(45))
  39 #define P7_SRR1_MC_IFETCH_TLB_MULTIHIT  (0x5 << PPC_BITLSHIFT(45)) /* P8 too */
  40 #define P7_SRR1_MC_IFETCH_UE_TLB_RELOAD (0x6 << PPC_BITLSHIFT(45)) /* P8 too */
  41 #define P7_SRR1_MC_IFETCH_UE_IFU_INTERNAL       (0x7 << PPC_BITLSHIFT(45))
  42
  43 /* SRR1 bits for machine check (On Power8) */
  44 #define P8_SRR1_MC_IFETCH_ERAT_MULTIHIT (0x4 << PPC_BITLSHIFT(45))
  45
  46 /* DSISR bits for machine check (On Power7 and Power8) */
  47 #define P7_DSISR_MC_UE                  (PPC_BIT(48))   /* P8 too */
  48 #define P7_DSISR_MC_UE_TABLEWALK        (PPC_BIT(49))   /* P8 too */
  49 #define P7_DSISR_MC_ERAT_MULTIHIT       (PPC_BIT(52))   /* P8 too */
  50 #define P7_DSISR_MC_TLB_MULTIHIT_MFTLB  (PPC_BIT(53))   /* P8 too */
  51 #define P7_DSISR_MC_SLB_PARITY_MFSLB    (PPC_BIT(55))   /* P8 too */
  52 #define P7_DSISR_MC_SLB_MULTIHIT        (PPC_BIT(56))   /* P8 too */
  53 #define P7_DSISR_MC_SLB_MULTIHIT_PARITY (PPC_BIT(57))   /* P8 too */
  54
  55 /*
  56  * DSISR bits for machine check (Power8) in addition to above.
  57  * Secondary DERAT Multihit
  58  */
  59 #define P8_DSISR_MC_ERAT_MULTIHIT_SEC   (PPC_BIT(54))
  60
  61 /* SLB error bits */
  62 #define P7_DSISR_MC_SLB_ERRORS          (P7_DSISR_MC_ERAT_MULTIHIT | \
  63                                          P7_DSISR_MC_SLB_PARITY_MFSLB | \
  64                                          P7_DSISR_MC_SLB_MULTIHIT | \
  65                                          P7_DSISR_MC_SLB_MULTIHIT_PARITY)
  66
  67 #define P8_DSISR_MC_SLB_ERRORS          (P7_DSISR_MC_SLB_ERRORS | \
  68                                          P8_DSISR_MC_ERAT_MULTIHIT_SEC)
  69 enum MCE_Version {
  70         MCE_V1 = 1,
  71 };
  72
  73 enum MCE_Severity {
  74         MCE_SEV_NO_ERROR = 0,
  75         MCE_SEV_WARNING = 1,
  76         MCE_SEV_ERROR_SYNC = 2,
  77         MCE_SEV_FATAL = 3,
  78 };
  79
  80 enum MCE_Disposition {
  81         MCE_DISPOSITION_RECOVERED = 0,
  82         MCE_DISPOSITION_NOT_RECOVERED = 1,
  83 };
  84
  85 enum MCE_Initiator {
  86         MCE_INITIATOR_UNKNOWN = 0,
  87         MCE_INITIATOR_CPU = 1,
  88 };
  89
  90 enum MCE_ErrorType {
  91         MCE_ERROR_TYPE_UNKNOWN = 0,
  92         MCE_ERROR_TYPE_UE = 1,
  93         MCE_ERROR_TYPE_SLB = 2,
  94         MCE_ERROR_TYPE_ERAT = 3,
  95         MCE_ERROR_TYPE_TLB = 4,
  96 };
  97
  98 enum MCE_UeErrorType {
  99         MCE_UE_ERROR_INDETERMINATE = 0,
 100         MCE_UE_ERROR_IFETCH = 1,
 101         MCE_UE_ERROR_PAGE_TABLE_WALK_IFETCH = 2,
 102         MCE_UE_ERROR_LOAD_STORE = 3,
 103         MCE_UE_ERROR_PAGE_TABLE_WALK_LOAD_STORE = 4,
 104 };
 105
 106 enum MCE_SlbErrorType {
 107         MCE_SLB_ERROR_INDETERMINATE = 0,
 108         MCE_SLB_ERROR_PARITY = 1,
 109         MCE_SLB_ERROR_MULTIHIT = 2,
 110 };
 111
 112 enum MCE_EratErrorType {
 113         MCE_ERAT_ERROR_INDETERMINATE = 0,
 114         MCE_ERAT_ERROR_PARITY = 1,
 115         MCE_ERAT_ERROR_MULTIHIT = 2,
 116 };
 117
 118 enum MCE_TlbErrorType {
 119         MCE_TLB_ERROR_INDETERMINATE = 0,
 120         MCE_TLB_ERROR_PARITY = 1,
 121         MCE_TLB_ERROR_MULTIHIT = 2,
 122 };
 123
 124 struct machine_check_event {
 125         enum MCE_Version        version:8;      /* 0x00 */
 126         uint8_t                 in_use;         /* 0x01 */
 127         enum MCE_Severity       severity:8;     /* 0x02 */
 128         enum MCE_Initiator      initiator:8;    /* 0x03 */
 129         enum MCE_ErrorType      error_type:8;   /* 0x04 */
 130         enum MCE_Disposition    disposition:8;  /* 0x05 */
 131         uint8_t                 reserved_1[2];  /* 0x06 */
 132         uint64_t                gpr3;           /* 0x08 */
 133         uint64_t                srr0;           /* 0x10 */
 134         uint64_t                srr1;           /* 0x18 */
 135         union {                                 /* 0x20 */
 136                 struct {
 137                         enum MCE_UeErrorType ue_error_type:8;
 138                         uint8_t         effective_address_provided;
 139                         uint8_t         physical_address_provided;
 140                         uint8_t         reserved_1[5];
 141                         uint64_t        effective_address;
 142                         uint64_t        physical_address;
 143                         uint8_t         reserved_2[8];
 144                 } ue_error;
 145
 146                 struct {
 147                         enum MCE_SlbErrorType slb_error_type:8;
 148                         uint8_t         effective_address_provided;
 149                         uint8_t         reserved_1[6];
 150                         uint64_t        effective_address;
 151                         uint8_t         reserved_2[16];
 152                 } slb_error;
 153
 154                 struct {
 155                         enum MCE_EratErrorType erat_error_type:8;
 156                         uint8_t         effective_address_provided;
 157                         uint8_t         reserved_1[6];
 158                         uint64_t        effective_address;
 159                         uint8_t         reserved_2[16];
 160                 } erat_error;
 161
 162                 struct {
 163                         enum MCE_TlbErrorType tlb_error_type:8;
 164                         uint8_t         effective_address_provided;
 165                         uint8_t         reserved_1[6];
 166                         uint64_t        effective_address;
 167                         uint8_t         reserved_2[16];
 168                 } tlb_error;
 169         } u;
 170 };
 171
 172 struct mce_error_info {
 173         enum MCE_ErrorType error_type:8;
 174         union {
 175                 enum MCE_UeErrorType ue_error_type:8;
 176                 enum MCE_SlbErrorType slb_error_type:8;
 177                 enum MCE_EratErrorType erat_error_type:8;
 178                 enum MCE_TlbErrorType tlb_error_type:8;
 179         } u;
 180         uint8_t         reserved[2];
 181 };
 182
 183 #define MAX_MC_EVT      100
 184
 185 /* Release flags for get_mce_event() */
 186 #define MCE_EVENT_RELEASE       true
 187 #define MCE_EVENT_DONTRELEASE   false
 188
 189 extern void save_mce_event(struct pt_regs *regs, long handled,
 190                            struct mce_error_info *mce_err, uint64_t addr);
 191 extern int get_mce_event(struct machine_check_event *mce, bool release);
 192 extern void release_mce_event(void);
 193 extern void machine_check_queue_event(void);
 194 extern void machine_check_print_event_info(struct machine_check_event *evt);
 195 extern uint64_t get_mce_fault_addr(struct machine_check_event *evt);
 196
 197 #endif /* __ASM_PPC64_MCE_H__ */