LXR qemu/target/s390x/diag.c

   1/*
   2 * S390x DIAG instruction helper functions
   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
  15#include "qemu/osdep.h"
  16#include "cpu.h"
  17#include "internal.h"
  18#include "exec/address-spaces.h"
  19#include "hw/watchdog/wdt_diag288.h"
  20#include "sysemu/cpus.h"
  21#include "hw/s390x/ipl.h"
  22#include "hw/s390x/s390-virtio-ccw.h"
  23
  24int handle_diag_288(CPUS390XState *env, uint64_t r1, uint64_t r3)
  25{
  26    uint64_t func = env->regs[r1];
  27    uint64_t timeout = env->regs[r1 + 1];
  28    uint64_t action = env->regs[r3];
  29    Object *obj;
  30    DIAG288State *diag288;
  31    DIAG288Class *diag288_class;
  32
  33    if (r1 % 2 || action != 0) {
  34        return -1;
  35    }
  36
  37    /* Timeout must be more than 15 seconds except for timer deletion */
  38    if (func != WDT_DIAG288_CANCEL && timeout < 15) {
  39        return -1;
  40    }
  41
  42    obj = object_resolve_path_type("", TYPE_WDT_DIAG288, NULL);
  43    if (!obj) {
  44        return -1;
  45    }
  46
  47    diag288 = DIAG288(obj);
  48    diag288_class = DIAG288_GET_CLASS(diag288);
  49    return diag288_class->handle_timer(diag288, func, timeout);
  50}
  51
  52#define DIAG_308_RC_OK              0x0001
  53#define DIAG_308_RC_NO_CONF         0x0102
  54#define DIAG_308_RC_INVALID         0x0402
  55
  56void handle_diag_308(CPUS390XState *env, uint64_t r1, uint64_t r3, uintptr_t ra)
  57{
  58    CPUState *cs = env_cpu(env);
  59    uint64_t addr =  env->regs[r1];
  60    uint64_t subcode = env->regs[r3];
  61    IplParameterBlock *iplb;
  62
  63    if (env->psw.mask & PSW_MASK_PSTATE) {
  64        s390_program_interrupt(env, PGM_PRIVILEGED, ILEN_AUTO, ra);
  65        return;
  66    }
  67
  68    if ((subcode & ~0x0ffffULL) || (subcode > 6)) {
  69        s390_program_interrupt(env, PGM_SPECIFICATION, ILEN_AUTO, ra);
  70        return;
  71    }
  72
  73    switch (subcode) {
  74    case 0:
  75        s390_ipl_reset_request(cs, S390_RESET_MODIFIED_CLEAR);
  76        break;
  77    case 1:
  78        s390_ipl_reset_request(cs, S390_RESET_LOAD_NORMAL);
  79        break;
  80    case 3:
  81        s390_ipl_reset_request(cs, S390_RESET_REIPL);
  82        break;
  83    case 5:
  84        if ((r1 & 1) || (addr & 0x0fffULL)) {
  85            s390_program_interrupt(env, PGM_SPECIFICATION, ILEN_AUTO, ra);
  86            return;
  87        }
  88        if (!address_space_access_valid(&address_space_memory, addr,
  89                                        sizeof(IplParameterBlock), false,
  90                                        MEMTXATTRS_UNSPECIFIED)) {
  91            s390_program_interrupt(env, PGM_ADDRESSING, ILEN_AUTO, ra);
  92            return;
  93        }
  94        iplb = g_new0(IplParameterBlock, 1);
  95        cpu_physical_memory_read(addr, iplb, sizeof(iplb->len));
  96        if (!iplb_valid_len(iplb)) {
  97            env->regs[r1 + 1] = DIAG_308_RC_INVALID;
  98            goto out;
  99        }
 100
 101        cpu_physical_memory_read(addr, iplb, be32_to_cpu(iplb->len));
 102
 103        if (!iplb_valid_ccw(iplb) && !iplb_valid_fcp(iplb)) {
 104            env->regs[r1 + 1] = DIAG_308_RC_INVALID;
 105            goto out;
 106        }
 107
 108        s390_ipl_update_diag308(iplb);
 109        env->regs[r1 + 1] = DIAG_308_RC_OK;
 110out:
 111        g_free(iplb);
 112        return;
 113    case 6:
 114        if ((r1 & 1) || (addr & 0x0fffULL)) {
 115            s390_program_interrupt(env, PGM_SPECIFICATION, ILEN_AUTO, ra);
 116            return;
 117        }
 118        if (!address_space_access_valid(&address_space_memory, addr,
 119                                        sizeof(IplParameterBlock), true,
 120                                        MEMTXATTRS_UNSPECIFIED)) {
 121            s390_program_interrupt(env, PGM_ADDRESSING, ILEN_AUTO, ra);
 122            return;
 123        }
 124        iplb = s390_ipl_get_iplb();
 125        if (iplb) {
 126            cpu_physical_memory_write(addr, iplb, be32_to_cpu(iplb->len));
 127            env->regs[r1 + 1] = DIAG_308_RC_OK;
 128        } else {
 129            env->regs[r1 + 1] = DIAG_308_RC_NO_CONF;
 130        }
 131        return;
 132    default:
 133        s390_program_interrupt(env, PGM_SPECIFICATION, ILEN_AUTO, ra);
 134        break;
 135    }
 136}
 137