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Diffstat (limited to 'hw/s390-virtio.c')
-rw-r--r--hw/s390-virtio.c255
1 files changed, 255 insertions, 0 deletions
diff --git a/hw/s390-virtio.c b/hw/s390-virtio.c
new file mode 100644
index 000000000..cc21ee6da
--- /dev/null
+++ b/hw/s390-virtio.c
@@ -0,0 +1,255 @@
+/*
+ * 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 "sysemu.h"
+#include "net.h"
+#include "boards.h"
+#include "monitor.h"
+#include "loader.h"
+#include "elf.h"
+#include "hw/virtio.h"
+#include "hw/virtio-console.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 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)
+{
+ int r = 0, i;
+ target_ulong mem = env->regs[2];
+
+ dprintf("KVM hypercall: %ld\n", env->regs[1]);
+ switch (env->regs[1]) {
+ 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:
+ {
+ /* Virtio_reset resets the internal addresses, so we'd have to sync
+ them up again. We don't want to reallocate a vring though, so let's
+ just not reset. */
+ /* virtio_reset(dev->vdev); */
+ 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;
+ }
+
+ env->regs[2] = r;
+ return 0;
+}
+
+/* PC hardware initialisation */
+static void s390_init(ram_addr_t 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 i;
+
+ /* get a BUS */
+ s390_bus = s390_virtio_bus_init(&ram_size);
+
+ /* allocate RAM */
+ ram_addr = qemu_ram_alloc(ram_size);
+ cpu_register_physical_memory(0, ram_size, ram_addr);
+
+ /* 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;
+ }
+
+ 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);
+ }
+
+ cpu_synchronize_state(env);
+ env->psw.addr = KERN_IMAGE_START;
+ env->psw.mask = 0x0000000180000000UL;
+ }
+
+ 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_rw(KERN_PARM_AREA, (uint8_t *)kernel_cmdline,
+ strlen(kernel_cmdline), 1);
+ }
+
+ /* Create VirtIO console */
+ qdev_init_nofail(qdev_create((BusState *)s390_bus, "virtio-console-s390"));
+
+ /* Create VirtIO network adapters */
+ for(i = 0; i < nb_nics; i++) {
+ NICInfo *nd = &nd_table[i];
+ DeviceState *dev;
+
+ if (!nd->model) {
+ nd->model = (char*)"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(dev, "drive", dinfo);
+ qdev_init_nofail(dev);
+ }
+}
+
+static QEMUMachine s390_machine = {
+ .name = "s390-virtio",
+ .alias = "s390",
+ .desc = "VirtIO based S390 machine",
+ .init = s390_init,
+ .max_cpus = 255,
+ .is_default = 1,
+};
+
+static void s390_machine_init(void)
+{
+ qemu_register_machine(&s390_machine);
+}
+
+machine_init(s390_machine_init);