hw/s390x/s390-virtio.c

   1 /*
   2  * QEMU S390 virtio target
   3  *
   4  * Copyright (c) 2009 Alexander Graf <agraf@suse.de>
   5  * Copyright IBM Corp 2012
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * Contributions after 2012-10-29 are licensed under the terms of the
  18  * GNU GPL, version 2 or (at your option) any later version.
  19  *
  20  * You should have received a copy of the GNU (Lesser) General Public
  21  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
  22  */
  23
  24 #include "qemu/osdep.h"
  25 #include "hw/hw.h"
  26 #include "qapi/qmp/qerror.h"
  27 #include "qemu/error-report.h"
  28 #include "sysemu/block-backend.h"
  29 #include "sysemu/blockdev.h"
  30 #include "sysemu/sysemu.h"
  31 #include "net/net.h"
  32 #include "hw/boards.h"
  33 #include "hw/loader.h"
  34 #include "hw/virtio/virtio.h"
  35 #include "sysemu/kvm.h"
  36 #include "exec/address-spaces.h"
  37 #include "sysemu/qtest.h"
  38
  39 #include "hw/s390x/sclp.h"
  40 #include "hw/s390x/s390_flic.h"
  41 #include "hw/s390x/s390-virtio.h"
  42 #include "hw/s390x/storage-keys.h"
  43 #include "hw/s390x/ipl.h"
  44 #include "cpu.h"
  45
  46 //#define DEBUG_S390
  47
  48 #ifdef DEBUG_S390
  49 #define DPRINTF(fmt, ...) \
  50     do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0)
  51 #else
  52 #define DPRINTF(fmt, ...) \
  53     do { } while (0)
  54 #endif
  55
  56 #define MAX_BLK_DEVS                    10
  57 #define ZIPL_FILENAME                   "s390-zipl.rom"
  58 #define S390_MACHINE                    "s390-virtio"
  59 #define TYPE_S390_MACHINE               MACHINE_TYPE_NAME(S390_MACHINE)
  60
  61 #define S390_TOD_CLOCK_VALUE_MISSING    0x00
  62 #define S390_TOD_CLOCK_VALUE_PRESENT    0x01
  63
  64 static S390CPU **ipi_states;
  65
  66 S390CPU *s390_cpu_addr2state(uint16_t cpu_addr)
  67 {
  68     if (cpu_addr >= smp_cpus) {
  69         return NULL;
  70     }
  71
  72     return ipi_states[cpu_addr];
  73 }
  74
  75 void s390_init_ipl_dev(const char *kernel_filename,
  76                        const char *kernel_cmdline,
  77                        const char *initrd_filename,
  78                        const char *firmware,
  79                        bool enforce_bios)
  80 {
  81     Object *new = object_new(TYPE_S390_IPL);
  82     DeviceState *dev = DEVICE(new);
  83
  84     if (kernel_filename) {
  85         qdev_prop_set_string(dev, "kernel", kernel_filename);
  86     }
  87     if (initrd_filename) {
  88         qdev_prop_set_string(dev, "initrd", initrd_filename);
  89     }
  90     qdev_prop_set_string(dev, "cmdline", kernel_cmdline);
  91     qdev_prop_set_string(dev, "firmware", firmware);
  92     qdev_prop_set_bit(dev, "enforce_bios", enforce_bios);
  93     object_property_add_child(qdev_get_machine(), TYPE_S390_IPL,
  94                               new, NULL);
  95     object_unref(new);
  96     qdev_init_nofail(dev);
  97 }
  98
  99 void s390_init_cpus(const char *cpu_model)
 100 {
 101     int i;
 102
 103     if (cpu_model == NULL) {
 104         cpu_model = "host";
 105     }
 106
 107     ipi_states = g_malloc(sizeof(S390CPU *) * smp_cpus);
 108
 109     for (i = 0; i < smp_cpus; i++) {
 110         S390CPU *cpu;
 111         CPUState *cs;
 112
 113         cpu = cpu_s390x_init(cpu_model);
 114         cs = CPU(cpu);
 115
 116         ipi_states[i] = cpu;
 117         cs->halted = 1;
 118         cs->exception_index = EXCP_HLT;
 119     }
 120 }
 121
 122
 123 void s390_create_virtio_net(BusState *bus, const char *name)
 124 {
 125     int i;
 126
 127     for (i = 0; i < nb_nics; i++) {
 128         NICInfo *nd = &nd_table[i];
 129         DeviceState *dev;
 130
 131         if (!nd->model) {
 132             nd->model = g_strdup("virtio");
 133         }
 134
 135         qemu_check_nic_model(nd, "virtio");
 136
 137         dev = qdev_create(bus, name);
 138         qdev_set_nic_properties(dev, nd);
 139         qdev_init_nofail(dev);
 140     }
 141 }
 142
 143 void gtod_save(QEMUFile *f, void *opaque)
 144 {
 145     uint64_t tod_low;
 146     uint8_t tod_high;
 147     int r;
 148
 149     r = s390_get_clock(&tod_high, &tod_low);
 150     if (r) {
 151         fprintf(stderr, "WARNING: Unable to get guest clock for migration. "
 152                         "Error code %d. Guest clock will not be migrated "
 153                         "which could cause the guest to hang.\n", r);
 154         qemu_put_byte(f, S390_TOD_CLOCK_VALUE_MISSING);
 155         return;
 156     }
 157
 158     qemu_put_byte(f, S390_TOD_CLOCK_VALUE_PRESENT);
 159     qemu_put_byte(f, tod_high);
 160     qemu_put_be64(f, tod_low);
 161 }
 162
 163 int gtod_load(QEMUFile *f, void *opaque, int version_id)
 164 {
 165     uint64_t tod_low;
 166     uint8_t tod_high;
 167     int r;
 168
 169     if (qemu_get_byte(f) == S390_TOD_CLOCK_VALUE_MISSING) {
 170         fprintf(stderr, "WARNING: Guest clock was not migrated. This could "
 171                         "cause the guest to hang.\n");
 172         return 0;
 173     }
 174
 175     tod_high = qemu_get_byte(f);
 176     tod_low = qemu_get_be64(f);
 177
 178     r = s390_set_clock(&tod_high, &tod_low);
 179     if (r) {
 180         fprintf(stderr, "WARNING: Unable to set guest clock value. "
 181                         "s390_get_clock returned error %d. This could cause "
 182                         "the guest to hang.\n", r);
 183     }
 184
 185     return 0;
 186 }
 187
 188 void s390_nmi(NMIState *n, int cpu_index, Error **errp)
 189 {
 190     CPUState *cs = qemu_get_cpu(cpu_index);
 191
 192     if (s390_cpu_restart(S390_CPU(cs))) {
 193         error_setg(errp, QERR_UNSUPPORTED);
 194     }
 195 }
 196
 197 void s390_machine_reset(void)
 198 {
 199     S390CPU *ipl_cpu = S390_CPU(qemu_get_cpu(0));
 200
 201     qemu_devices_reset();
 202     s390_cmma_reset();
 203     s390_crypto_reset();
 204
 205     /* all cpus are stopped - configure and start the ipl cpu only */
 206     s390_ipl_prepare_cpu(ipl_cpu);
 207     s390_cpu_set_state(CPU_STATE_OPERATING, ipl_cpu);
 208 }