aboutsummaryrefslogtreecommitdiff
path: root/hw/s390-virtio.c
blob: 3eba7ea1e815366445a84d98ff8f443370c6337e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
/*
 * QEMU S390 virtio target
 *
 * Copyright (c) 2009 Alexander Graf <agraf@suse.de>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
 */

#include "hw.h"
#include "block.h"
#include "blockdev.h"
#include "sysemu.h"
#include "net.h"
#include "boards.h"
#include "monitor.h"
#include "loader.h"
#include "elf.h"
#include "hw/virtio.h"
#include "hw/sysbus.h"
#include "kvm.h"

#include "hw/s390-virtio-bus.h"

//#define DEBUG_S390

#ifdef DEBUG_S390
#define dprintf(fmt, ...) \
    do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0)
#else
#define dprintf(fmt, ...) \
    do { } while (0)
#endif

#define KVM_S390_VIRTIO_NOTIFY          0
#define KVM_S390_VIRTIO_RESET           1
#define KVM_S390_VIRTIO_SET_STATUS      2

#define KERN_IMAGE_START                0x010000UL
#define KERN_PARM_AREA                  0x010480UL
#define INITRD_START                    0x800000UL
#define INITRD_PARM_START               0x010408UL
#define INITRD_PARM_SIZE                0x010410UL
#define PARMFILE_START                  0x001000UL

#define ZIPL_START			0x009000UL
#define ZIPL_LOAD_ADDR			0x009000UL
#define ZIPL_FILENAME			"s390-zipl.rom"

#define MAX_BLK_DEVS                    10

static VirtIOS390Bus *s390_bus;
static CPUState **ipi_states;

void irq_info(Monitor *mon);
void pic_info(Monitor *mon);

void irq_info(Monitor *mon)
{
}

void pic_info(Monitor *mon)
{
}

CPUState *s390_cpu_addr2state(uint16_t cpu_addr)
{
    if (cpu_addr >= smp_cpus) {
        return NULL;
    }

    return ipi_states[cpu_addr];
}

int s390_virtio_hypercall(CPUState *env, uint64_t mem, uint64_t hypercall)
{
    int r = 0, i;

    dprintf("KVM hypercall: %ld\n", hypercall);
    switch (hypercall) {
    case KVM_S390_VIRTIO_NOTIFY:
        if (mem > ram_size) {
            VirtIOS390Device *dev = s390_virtio_bus_find_vring(s390_bus,
                                                               mem, &i);
            if (dev) {
                virtio_queue_notify(dev->vdev, i);
            } else {
                r = -EINVAL;
            }
        } else {
            /* Early printk */
        }
        break;
    case KVM_S390_VIRTIO_RESET:
    {
        VirtIOS390Device *dev;

        dev = s390_virtio_bus_find_mem(s390_bus, mem);
        virtio_reset(dev->vdev);
        s390_virtio_device_sync(dev);
        break;
    }
    case KVM_S390_VIRTIO_SET_STATUS:
    {
        VirtIOS390Device *dev;

        dev = s390_virtio_bus_find_mem(s390_bus, mem);
        if (dev) {
            s390_virtio_device_update_status(dev);
        } else {
            r = -EINVAL;
        }
        break;
    }
    default:
        r = -EINVAL;
        break;
    }

    return r;
}

/* PC hardware initialisation */
static void s390_init(ram_addr_t my_ram_size,
                      const char *boot_device,
                      const char *kernel_filename,
                      const char *kernel_cmdline,
                      const char *initrd_filename,
                      const char *cpu_model)
{
    CPUState *env = NULL;
    ram_addr_t ram_addr;
    ram_addr_t kernel_size = 0;
    ram_addr_t initrd_offset;
    ram_addr_t initrd_size = 0;
    int shift = 0;
    uint8_t *storage_keys;
    int i;

    /* s390x ram size detection needs a 16bit multiplier + an increment. So
       guests > 64GB can be specified in 2MB steps etc. */
    while ((my_ram_size >> (20 + shift)) > 65535) {
        shift++;
    }
    my_ram_size = my_ram_size >> (20 + shift) << (20 + shift);

    /* lets propagate the changed ram size into the global variable. */
    ram_size = my_ram_size;

    /* get a BUS */
    s390_bus = s390_virtio_bus_init(&my_ram_size);

    /* allocate RAM */
    ram_addr = qemu_ram_alloc(NULL, "s390.ram", my_ram_size);
    cpu_register_physical_memory(0, my_ram_size, ram_addr);

    /* allocate storage keys */
    storage_keys = qemu_mallocz(my_ram_size / TARGET_PAGE_SIZE);

    /* init CPUs */
    if (cpu_model == NULL) {
        cpu_model = "host";
    }

    ipi_states = qemu_malloc(sizeof(CPUState *) * smp_cpus);

    for (i = 0; i < smp_cpus; i++) {
        CPUState *tmp_env;

        tmp_env = cpu_init(cpu_model);
        if (!env) {
            env = tmp_env;
        }
        ipi_states[i] = tmp_env;
        tmp_env->halted = 1;
        tmp_env->exception_index = EXCP_HLT;
        tmp_env->storage_keys = storage_keys;
    }

    env->halted = 0;
    env->exception_index = 0;

    if (kernel_filename) {
        kernel_size = load_image(kernel_filename, qemu_get_ram_ptr(0));

        if (lduw_phys(KERN_IMAGE_START) != 0x0dd0) {
            fprintf(stderr, "Specified image is not an s390 boot image\n");
            exit(1);
        }

        env->psw.addr = KERN_IMAGE_START;
        env->psw.mask = 0x0000000180000000ULL;
    } else {
        ram_addr_t bios_size = 0;
        char *bios_filename;

        /* Load zipl bootloader */
        if (bios_name == NULL) {
            bios_name = ZIPL_FILENAME;
        }

        bios_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
        bios_size = load_image(bios_filename, qemu_get_ram_ptr(ZIPL_LOAD_ADDR));
        qemu_free(bios_filename);

        if ((long)bios_size < 0) {
            hw_error("could not load bootloader '%s'\n", bios_name);
        }

        if (bios_size > 4096) {
            hw_error("stage1 bootloader is > 4k\n");
        }

        env->psw.addr = ZIPL_START;
        env->psw.mask = 0x0000000180000000ULL;
    }

    if (initrd_filename) {
        initrd_offset = INITRD_START;
        while (kernel_size + 0x100000 > initrd_offset) {
            initrd_offset += 0x100000;
        }
        initrd_size = load_image(initrd_filename, qemu_get_ram_ptr(initrd_offset));

        stq_phys(INITRD_PARM_START, initrd_offset);
        stq_phys(INITRD_PARM_SIZE, initrd_size);
    }

    if (kernel_cmdline) {
        cpu_physical_memory_write(KERN_PARM_AREA, kernel_cmdline,
                                  strlen(kernel_cmdline));
    }

    /* Create VirtIO network adapters */
    for(i = 0; i < nb_nics; i++) {
        NICInfo *nd = &nd_table[i];
        DeviceState *dev;

        if (!nd->model) {
            nd->model = qemu_strdup("virtio");
        }

        if (strcmp(nd->model, "virtio")) {
            fprintf(stderr, "S390 only supports VirtIO nics\n");
            exit(1);
        }

        dev = qdev_create((BusState *)s390_bus, "virtio-net-s390");
        qdev_set_nic_properties(dev, nd);
        qdev_init_nofail(dev);
    }

    /* Create VirtIO disk drives */
    for(i = 0; i < MAX_BLK_DEVS; i++) {
        DriveInfo *dinfo;
        DeviceState *dev;

        dinfo = drive_get(IF_IDE, 0, i);
        if (!dinfo) {
            continue;
        }

        dev = qdev_create((BusState *)s390_bus, "virtio-blk-s390");
        qdev_prop_set_drive_nofail(dev, "drive", dinfo->bdrv);
        qdev_init_nofail(dev);
    }
}

static QEMUMachine s390_machine = {
    .name = "s390-virtio",
    .alias = "s390",
    .desc = "VirtIO based S390 machine",
    .init = s390_init,
    .no_serial = 1,
    .no_parallel = 1,
    .use_virtcon = 1,
    .no_vga = 1,
    .max_cpus = 255,
    .is_default = 1,
};

static void s390_machine_init(void)
{
    qemu_register_machine(&s390_machine);
}

machine_init(s390_machine_init);