Merge remote-tracking branch 'agraf/s390-for-upstream' into staging
* agraf/s390-for-upstream: s390: reset avail and used index on reboot S390: dont call system_shutdown on disabled wait S390: remove default cdrom, sd-card and floppy support S390: support reboot for kvm on s390 S390: reboot: reset device pages on reboot S390: fix error handling on kernel and initrd failures S390: fix kernel_commandline handling
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commit
174210fe70
@ -57,6 +57,29 @@ static ram_addr_t s390_virtio_device_num_vq(VirtIOS390Device *dev);
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/* length of VirtIO device pages */
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const target_phys_addr_t virtio_size = S390_DEVICE_PAGES * TARGET_PAGE_SIZE;
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static void s390_virtio_bus_reset(void *opaque)
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{
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VirtIOS390Bus *bus = opaque;
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bus->next_ring = bus->dev_page + TARGET_PAGE_SIZE;
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}
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void s390_virtio_reset_idx(VirtIOS390Device *dev)
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{
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int i;
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target_phys_addr_t idx_addr;
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uint8_t num_vq;
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num_vq = s390_virtio_device_num_vq(dev);
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for (i = 0; i < num_vq; i++) {
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idx_addr = virtio_queue_get_avail_addr(dev->vdev, i) +
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VIRTIO_VRING_AVAIL_IDX_OFFS;
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stw_phys(idx_addr, 0);
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idx_addr = virtio_queue_get_used_addr(dev->vdev, i) +
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VIRTIO_VRING_USED_IDX_OFFS;
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stw_phys(idx_addr, 0);
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}
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}
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VirtIOS390Bus *s390_virtio_bus_init(ram_addr_t *ram_size)
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{
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VirtIOS390Bus *bus;
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@ -82,6 +105,7 @@ VirtIOS390Bus *s390_virtio_bus_init(ram_addr_t *ram_size)
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/* Allocate RAM for VirtIO device pages (descriptors, queues, rings) */
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*ram_size += S390_DEVICE_PAGES * TARGET_PAGE_SIZE;
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qemu_register_reset(s390_virtio_bus_reset, bus);
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return bus;
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}
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@ -114,7 +138,7 @@ static int s390_virtio_device_init(VirtIOS390Device *dev, VirtIODevice *vdev)
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virtio_bind_device(vdev, &virtio_s390_bindings, dev);
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dev->host_features = vdev->get_features(vdev, dev->host_features);
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s390_virtio_device_sync(dev);
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s390_virtio_reset_idx(dev);
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if (dev->qdev.hotplugged) {
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CPUS390XState *env = s390_cpu_addr2state(0);
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s390_virtio_irq(env, VIRTIO_PARAM_DEV_ADD, dev->dev_offs);
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@ -34,6 +34,8 @@
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#define VIRTIO_VQCONFIG_LEN 24
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#define VIRTIO_RING_LEN (TARGET_PAGE_SIZE * 3)
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#define VIRTIO_VRING_AVAIL_IDX_OFFS 2
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#define VIRTIO_VRING_USED_IDX_OFFS 2
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#define S390_DEVICE_PAGES 512
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#define VIRTIO_PARAM_MASK 0xff
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@ -90,3 +92,5 @@ VirtIOS390Device *s390_virtio_bus_find_vring(VirtIOS390Bus *bus,
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ram_addr_t mem, int *vq_num);
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VirtIOS390Device *s390_virtio_bus_find_mem(VirtIOS390Bus *bus, ram_addr_t mem);
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void s390_virtio_device_sync(VirtIOS390Device *dev);
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void s390_virtio_reset_idx(VirtIOS390Device *dev);
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@ -99,6 +99,7 @@ int s390_virtio_hypercall(CPUS390XState *env, uint64_t mem, uint64_t hypercall)
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virtio_reset(dev->vdev);
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stb_phys(dev->dev_offs + VIRTIO_DEV_OFFS_STATUS, 0);
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s390_virtio_device_sync(dev);
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s390_virtio_reset_idx(dev);
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break;
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}
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case KVM_S390_VIRTIO_SET_STATUS:
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@ -230,6 +231,11 @@ static void s390_init(ram_addr_t my_ram_size,
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if (kernel_size == -1UL) {
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kernel_size = load_image_targphys(kernel_filename, 0, ram_size);
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}
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if (kernel_size == -1UL) {
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fprintf(stderr, "qemu: could not load kernel '%s'\n",
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kernel_filename);
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exit(1);
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}
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/*
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* we can not rely on the ELF entry point, since up to 3.2 this
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* value was 0x800 (the SALIPL loader) and it wont work. For
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@ -269,12 +275,18 @@ static void s390_init(ram_addr_t my_ram_size,
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}
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initrd_size = load_image_targphys(initrd_filename, initrd_offset,
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ram_size - initrd_offset);
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if (initrd_size == -1UL) {
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fprintf(stderr, "qemu: could not load initrd '%s'\n",
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initrd_filename);
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exit(1);
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}
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/* we have to overwrite values in the kernel image, which are "rom" */
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memcpy(rom_ptr(INITRD_PARM_START), &initrd_offset, 8);
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memcpy(rom_ptr(INITRD_PARM_SIZE), &initrd_size, 8);
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}
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if (kernel_cmdline) {
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if (rom_ptr(KERN_PARM_AREA)) {
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/* we have to overwrite values in the kernel image, which are "rom" */
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memcpy(rom_ptr(KERN_PARM_AREA), kernel_cmdline,
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strlen(kernel_cmdline) + 1);
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@ -320,8 +332,11 @@ static QEMUMachine s390_machine = {
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.alias = "s390",
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.desc = "VirtIO based S390 machine",
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.init = s390_init,
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.no_cdrom = 1,
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.no_floppy = 1,
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.no_serial = 1,
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.no_parallel = 1,
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.no_sdcard = 1,
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.use_virtcon = 1,
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.max_cpus = 255,
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.is_default = 1,
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@ -407,6 +407,12 @@ static int handle_instruction(CPUS390XState *env, struct kvm_run *run)
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return 0;
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}
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static bool is_special_wait_psw(CPUS390XState *env)
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{
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/* signal quiesce */
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return env->kvm_run->psw_addr == 0xfffUL;
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}
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static int handle_intercept(CPUS390XState *env)
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{
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struct kvm_run *run = env->kvm_run;
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@ -420,6 +426,12 @@ static int handle_intercept(CPUS390XState *env)
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r = handle_instruction(env, run);
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break;
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case ICPT_WAITPSW:
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if (s390_del_running_cpu(env) == 0 &&
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is_special_wait_psw(env)) {
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qemu_system_shutdown_request();
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}
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r = EXCP_HALTED;
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break;
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case ICPT_CPU_STOP:
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if (s390_del_running_cpu(env) == 0) {
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qemu_system_shutdown_request();
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@ -452,8 +464,7 @@ int kvm_arch_handle_exit(CPUS390XState *env, struct kvm_run *run)
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ret = handle_intercept(env);
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break;
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case KVM_EXIT_S390_RESET:
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fprintf(stderr, "RESET not implemented\n");
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exit(1);
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qemu_system_reset_request();
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break;
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default:
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fprintf(stderr, "Unknown KVM exit: %d\n", run->exit_reason);
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