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 MAX_BLK_DEVS 10
57 static VirtIOS390Bus *s390_bus;
58 static CPUState **ipi_states;
60 void irq_info(Monitor *mon);
61 void pic_info(Monitor *mon);
63 void irq_info(Monitor *mon)
67 void pic_info(Monitor *mon)
71 CPUState *s390_cpu_addr2state(uint16_t cpu_addr)
73 if (cpu_addr >= smp_cpus) {
77 return ipi_states[cpu_addr];
80 int s390_virtio_hypercall(CPUState *env)
83 target_ulong mem = env->regs[2];
85 dprintf("KVM hypercall: %ld\n", env->regs[1]);
86 switch (env->regs[1]) {
87 case KVM_S390_VIRTIO_NOTIFY:
89 VirtIOS390Device *dev = s390_virtio_bus_find_vring(s390_bus,
92 virtio_queue_notify(dev->vdev, i);
100 case KVM_S390_VIRTIO_RESET:
102 VirtIOS390Device *dev;
104 dev = s390_virtio_bus_find_mem(s390_bus, mem);
105 virtio_reset(dev->vdev);
106 s390_virtio_device_sync(dev);
109 case KVM_S390_VIRTIO_SET_STATUS:
111 VirtIOS390Device *dev;
113 dev = s390_virtio_bus_find_mem(s390_bus, mem);
115 s390_virtio_device_update_status(dev);
130 /* PC hardware initialisation */
131 static void s390_init(ram_addr_t ram_size,
132 const char *boot_device,
133 const char *kernel_filename,
134 const char *kernel_cmdline,
135 const char *initrd_filename,
136 const char *cpu_model)
138 CPUState *env = NULL;
140 ram_addr_t kernel_size = 0;
141 ram_addr_t initrd_offset;
142 ram_addr_t initrd_size = 0;
145 /* XXX we only work on KVM for now */
147 if (!kvm_enabled()) {
148 fprintf(stderr, "The S390 target only works with KVM enabled\n");
153 s390_bus = s390_virtio_bus_init(&ram_size);
156 ram_addr = qemu_ram_alloc(ram_size);
157 cpu_register_physical_memory(0, ram_size, ram_addr);
160 if (cpu_model == NULL) {
164 ipi_states = qemu_malloc(sizeof(CPUState *) * smp_cpus);
166 for (i = 0; i < smp_cpus; i++) {
169 tmp_env = cpu_init(cpu_model);
173 ipi_states[i] = tmp_env;
175 tmp_env->exception_index = EXCP_HLT;
179 env->exception_index = 0;
181 if (kernel_filename) {
182 kernel_size = load_image(kernel_filename, qemu_get_ram_ptr(0));
184 if (lduw_phys(KERN_IMAGE_START) != 0x0dd0) {
185 fprintf(stderr, "Specified image is not an s390 boot image\n");
189 env->psw.addr = KERN_IMAGE_START;
190 env->psw.mask = 0x0000000180000000ULL;
193 if (initrd_filename) {
194 initrd_offset = INITRD_START;
195 while (kernel_size + 0x100000 > initrd_offset) {
196 initrd_offset += 0x100000;
198 initrd_size = load_image(initrd_filename, qemu_get_ram_ptr(initrd_offset));
200 stq_phys(INITRD_PARM_START, initrd_offset);
201 stq_phys(INITRD_PARM_SIZE, initrd_size);
204 if (kernel_cmdline) {
205 cpu_physical_memory_rw(KERN_PARM_AREA, (uint8_t *)kernel_cmdline,
206 strlen(kernel_cmdline), 1);
209 /* Create VirtIO network adapters */
210 for(i = 0; i < nb_nics; i++) {
211 NICInfo *nd = &nd_table[i];
215 nd->model = qemu_strdup("virtio");
218 if (strcmp(nd->model, "virtio")) {
219 fprintf(stderr, "S390 only supports VirtIO nics\n");
223 dev = qdev_create((BusState *)s390_bus, "virtio-net-s390");
224 qdev_set_nic_properties(dev, nd);
225 qdev_init_nofail(dev);
228 /* Create VirtIO disk drives */
229 for(i = 0; i < MAX_BLK_DEVS; i++) {
233 dinfo = drive_get(IF_IDE, 0, i);
238 dev = qdev_create((BusState *)s390_bus, "virtio-blk-s390");
239 qdev_prop_set_drive(dev, "drive", dinfo);
240 qdev_init_nofail(dev);
244 static QEMUMachine s390_machine = {
245 .name = "s390-virtio",
247 .desc = "VirtIO based S390 machine",
257 static void s390_machine_init(void)
259 qemu_register_machine(&s390_machine);
262 machine_init(s390_machine_init);