1 /* 2 * s390x interrupt handling 3 * 4 * Copyright (c) 2017 Red Hat Inc 5 * 6 * Authors: 7 * David Hildenbrand <david@redhat.com> 8 * 9 * This code is free software; you can redistribute it and/or modify it 10 * under the terms of the GNU Library General Public License version 2. 11 */ 12 #include <libcflat.h> 13 #include <asm/interrupt.h> 14 #include <asm/barrier.h> 15 16 static bool pgm_int_expected; 17 static struct lowcore *lc; 18 19 void expect_pgm_int(void) 20 { 21 pgm_int_expected = true; 22 lc->pgm_int_code = 0; 23 mb(); 24 } 25 26 void check_pgm_int_code(uint16_t code) 27 { 28 mb(); 29 report("Program interrupt: expected(%d) == received(%d)", 30 code == lc->pgm_int_code, code, lc->pgm_int_code); 31 } 32 33 static void fixup_pgm_int(void) 34 { 35 switch (lc->pgm_int_code) { 36 case PGM_INT_CODE_SEGMENT_TRANSLATION: 37 case PGM_INT_CODE_PAGE_TRANSLATION: 38 case PGM_INT_CODE_TRACE_TABLE: 39 case PGM_INT_CODE_AFX_TRANSLATION: 40 case PGM_INT_CODE_ASX_TRANSLATION: 41 case PGM_INT_CODE_LX_TRANSLATION: 42 case PGM_INT_CODE_EX_TRANSLATION: 43 case PGM_INT_CODE_PRIMARY_AUTHORITY: 44 case PGM_INT_CODE_SECONDARY_AUTHORITY: 45 case PGM_INT_CODE_LFX_TRANSLATION: 46 case PGM_INT_CODE_LSX_TRANSLATION: 47 case PGM_INT_CODE_ALEN_TRANSLATION: 48 case PGM_INT_CODE_ALE_SEQUENCE: 49 case PGM_INT_CODE_ASTE_VALIDITY: 50 case PGM_INT_CODE_ASTE_SEQUENCE: 51 case PGM_INT_CODE_EXTENDED_AUTHORITY: 52 case PGM_INT_CODE_LSTE_SEQUENCE: 53 case PGM_INT_CODE_ASTE_INSTANCE: 54 case PGM_INT_CODE_STACK_FULL: 55 case PGM_INT_CODE_STACK_EMPTY: 56 case PGM_INT_CODE_STACK_SPECIFICATION: 57 case PGM_INT_CODE_STACK_TYPE: 58 case PGM_INT_CODE_STACK_OPERATION: 59 case PGM_INT_CODE_ASCE_TYPE: 60 case PGM_INT_CODE_REGION_FIRST_TRANS: 61 case PGM_INT_CODE_REGION_SECOND_TRANS: 62 case PGM_INT_CODE_REGION_THIRD_TRANS: 63 case PGM_INT_CODE_PER: 64 case PGM_INT_CODE_CRYPTO_OPERATION: 65 /* The interrupt was nullified, the old PSW points at the 66 * responsible instruction. Forward the PSW so we don't loop. 67 */ 68 lc->pgm_old_psw.addr += lc->pgm_int_id; 69 } 70 /* suppressed/terminated/completed point already at the next address */ 71 } 72 73 void handle_pgm_int(void) 74 { 75 if (!pgm_int_expected) 76 report_abort("Unexpected program interrupt: %d at %#lx, ilen %d\n", 77 lc->pgm_int_code, lc->pgm_old_psw.addr, 78 lc->pgm_int_id); 79 80 pgm_int_expected = false; 81 fixup_pgm_int(); 82 } 83