2 * QEMU S390 virtio target
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
28 #include "hw/virtio.h"
29 #include "hw/sysbus.h"
32 #include "hw/s390-virtio-bus.h"
37 #define dprintf(fmt, ...) \
38 do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0)
40 #define dprintf(fmt, ...) \
44 #define KVM_S390_VIRTIO_NOTIFY 0
45 #define KVM_S390_VIRTIO_RESET 1
46 #define KVM_S390_VIRTIO_SET_STATUS 2
48 #define KERN_IMAGE_START 0x010000UL
49 #define KERN_PARM_AREA 0x010480UL
50 #define INITRD_START 0x800000UL
51 #define INITRD_PARM_START 0x010408UL
52 #define INITRD_PARM_SIZE 0x010410UL
53 #define PARMFILE_START 0x001000UL
55 #define ZIPL_START 0x009000UL
56 #define ZIPL_LOAD_ADDR 0x009000UL
57 #define ZIPL_FILENAME "s390-zipl.rom"
59 #define MAX_BLK_DEVS 10
61 static VirtIOS390Bus *s390_bus;
62 static CPUState **ipi_states;
64 void irq_info(Monitor *mon);
65 void pic_info(Monitor *mon);
67 void irq_info(Monitor *mon)
71 void pic_info(Monitor *mon)
75 CPUState *s390_cpu_addr2state(uint16_t cpu_addr)
77 if (cpu_addr >= smp_cpus) {
81 return ipi_states[cpu_addr];
84 int s390_virtio_hypercall(CPUState *env)
87 target_ulong mem = env->regs[2];
89 dprintf("KVM hypercall: %ld\n", env->regs[1]);
90 switch (env->regs[1]) {
91 case KVM_S390_VIRTIO_NOTIFY:
93 VirtIOS390Device *dev = s390_virtio_bus_find_vring(s390_bus,
96 virtio_queue_notify(dev->vdev, i);
104 case KVM_S390_VIRTIO_RESET:
106 VirtIOS390Device *dev;
108 dev = s390_virtio_bus_find_mem(s390_bus, mem);
109 virtio_reset(dev->vdev);
110 s390_virtio_device_sync(dev);
113 case KVM_S390_VIRTIO_SET_STATUS:
115 VirtIOS390Device *dev;
117 dev = s390_virtio_bus_find_mem(s390_bus, mem);
119 s390_virtio_device_update_status(dev);
134 /* PC hardware initialisation */
135 static void s390_init(ram_addr_t ram_size,
136 const char *boot_device,
137 const char *kernel_filename,
138 const char *kernel_cmdline,
139 const char *initrd_filename,
140 const char *cpu_model)
142 CPUState *env = NULL;
144 ram_addr_t kernel_size = 0;
145 ram_addr_t initrd_offset;
146 ram_addr_t initrd_size = 0;
149 /* XXX we only work on KVM for now */
151 if (!kvm_enabled()) {
152 fprintf(stderr, "The S390 target only works with KVM enabled\n");
157 s390_bus = s390_virtio_bus_init(&ram_size);
160 ram_addr = qemu_ram_alloc(NULL, "s390.ram", ram_size);
161 cpu_register_physical_memory(0, ram_size, ram_addr);
164 if (cpu_model == NULL) {
168 ipi_states = qemu_malloc(sizeof(CPUState *) * smp_cpus);
170 for (i = 0; i < smp_cpus; i++) {
173 tmp_env = cpu_init(cpu_model);
177 ipi_states[i] = tmp_env;
179 tmp_env->exception_index = EXCP_HLT;
183 env->exception_index = 0;
185 if (kernel_filename) {
186 kernel_size = load_image(kernel_filename, qemu_get_ram_ptr(0));
188 if (lduw_phys(KERN_IMAGE_START) != 0x0dd0) {
189 fprintf(stderr, "Specified image is not an s390 boot image\n");
193 env->psw.addr = KERN_IMAGE_START;
194 env->psw.mask = 0x0000000180000000ULL;
196 ram_addr_t bios_size = 0;
199 /* Load zipl bootloader */
200 if (bios_name == NULL) {
201 bios_name = ZIPL_FILENAME;
204 bios_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
205 bios_size = load_image(bios_filename, qemu_get_ram_ptr(ZIPL_LOAD_ADDR));
207 if ((long)bios_size < 0) {
208 hw_error("could not load bootloader '%s'\n", bios_name);
211 if (bios_size > 4096) {
212 hw_error("stage1 bootloader is > 4k\n");
215 env->psw.addr = ZIPL_START;
216 env->psw.mask = 0x0000000180000000ULL;
219 if (initrd_filename) {
220 initrd_offset = INITRD_START;
221 while (kernel_size + 0x100000 > initrd_offset) {
222 initrd_offset += 0x100000;
224 initrd_size = load_image(initrd_filename, qemu_get_ram_ptr(initrd_offset));
226 stq_phys(INITRD_PARM_START, initrd_offset);
227 stq_phys(INITRD_PARM_SIZE, initrd_size);
230 if (kernel_cmdline) {
231 cpu_physical_memory_rw(KERN_PARM_AREA, (uint8_t *)kernel_cmdline,
232 strlen(kernel_cmdline), 1);
235 /* Create VirtIO network adapters */
236 for(i = 0; i < nb_nics; i++) {
237 NICInfo *nd = &nd_table[i];
241 nd->model = qemu_strdup("virtio");
244 if (strcmp(nd->model, "virtio")) {
245 fprintf(stderr, "S390 only supports VirtIO nics\n");
249 dev = qdev_create((BusState *)s390_bus, "virtio-net-s390");
250 qdev_set_nic_properties(dev, nd);
251 qdev_init_nofail(dev);
254 /* Create VirtIO disk drives */
255 for(i = 0; i < MAX_BLK_DEVS; i++) {
259 dinfo = drive_get(IF_IDE, 0, i);
264 dev = qdev_create((BusState *)s390_bus, "virtio-blk-s390");
265 qdev_prop_set_drive_nofail(dev, "drive", dinfo->bdrv);
266 qdev_init_nofail(dev);
270 static QEMUMachine s390_machine = {
271 .name = "s390-virtio",
273 .desc = "VirtIO based S390 machine",
283 static void s390_machine_init(void)
285 qemu_register_machine(&s390_machine);
288 machine_init(s390_machine_init);