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-rw-r--r--hw/s390x/s390-virtio-ccw.c307
1 files changed, 307 insertions, 0 deletions
diff --git a/hw/s390x/s390-virtio-ccw.c b/hw/s390x/s390-virtio-ccw.c
new file mode 100644
index 00000000..4c51d1a5
--- /dev/null
+++ b/hw/s390x/s390-virtio-ccw.c
@@ -0,0 +1,307 @@
+/*
+ * virtio ccw machine
+ *
+ * Copyright 2012 IBM Corp.
+ * Author(s): Cornelia Huck <cornelia.huck@de.ibm.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or (at
+ * your option) any later version. See the COPYING file in the top-level
+ * directory.
+ */
+
+#include "hw/boards.h"
+#include "exec/address-spaces.h"
+#include "s390-virtio.h"
+#include "hw/s390x/sclp.h"
+#include "hw/s390x/s390_flic.h"
+#include "ioinst.h"
+#include "css.h"
+#include "virtio-ccw.h"
+#include "qemu/config-file.h"
+#include "s390-pci-bus.h"
+
+#define TYPE_S390_CCW_MACHINE "s390-ccw-machine"
+
+#define S390_CCW_MACHINE(obj) \
+ OBJECT_CHECK(S390CcwMachineState, (obj), TYPE_S390_CCW_MACHINE)
+
+typedef struct S390CcwMachineState {
+ /*< private >*/
+ MachineState parent_obj;
+
+ /*< public >*/
+ bool aes_key_wrap;
+ bool dea_key_wrap;
+} S390CcwMachineState;
+
+void io_subsystem_reset(void)
+{
+ DeviceState *css, *sclp, *flic, *diag288;
+
+ css = DEVICE(object_resolve_path_type("", "virtual-css-bridge", NULL));
+ if (css) {
+ qdev_reset_all(css);
+ }
+ sclp = DEVICE(object_resolve_path_type("",
+ "s390-sclp-event-facility", NULL));
+ if (sclp) {
+ qdev_reset_all(sclp);
+ }
+ flic = DEVICE(object_resolve_path_type("", "s390-flic", NULL));
+ if (flic) {
+ qdev_reset_all(flic);
+ }
+ diag288 = DEVICE(object_resolve_path_type("", "diag288", NULL));
+ if (diag288) {
+ qdev_reset_all(diag288);
+ }
+}
+
+static int virtio_ccw_hcall_notify(const uint64_t *args)
+{
+ uint64_t subch_id = args[0];
+ uint64_t queue = args[1];
+ SubchDev *sch;
+ int cssid, ssid, schid, m;
+
+ if (ioinst_disassemble_sch_ident(subch_id, &m, &cssid, &ssid, &schid)) {
+ return -EINVAL;
+ }
+ sch = css_find_subch(m, cssid, ssid, schid);
+ if (!sch || !css_subch_visible(sch)) {
+ return -EINVAL;
+ }
+ if (queue >= VIRTIO_CCW_QUEUE_MAX) {
+ return -EINVAL;
+ }
+ virtio_queue_notify(virtio_ccw_get_vdev(sch), queue);
+ return 0;
+
+}
+
+static int virtio_ccw_hcall_early_printk(const uint64_t *args)
+{
+ uint64_t mem = args[0];
+
+ if (mem < ram_size) {
+ /* Early printk */
+ return 0;
+ }
+ return -EINVAL;
+}
+
+static void virtio_ccw_register_hcalls(void)
+{
+ s390_register_virtio_hypercall(KVM_S390_VIRTIO_CCW_NOTIFY,
+ virtio_ccw_hcall_notify);
+ /* Tolerate early printk. */
+ s390_register_virtio_hypercall(KVM_S390_VIRTIO_NOTIFY,
+ virtio_ccw_hcall_early_printk);
+}
+
+static void ccw_init(MachineState *machine)
+{
+ ram_addr_t my_ram_size = machine->ram_size;
+ MemoryRegion *sysmem = get_system_memory();
+ MemoryRegion *ram = g_new(MemoryRegion, 1);
+ sclpMemoryHotplugDev *mhd = init_sclp_memory_hotplug_dev();
+ uint8_t *storage_keys;
+ int ret;
+ VirtualCssBus *css_bus;
+ DeviceState *dev;
+ QemuOpts *opts = qemu_opts_find(qemu_find_opts("memory"), NULL);
+ ram_addr_t pad_size = 0;
+ ram_addr_t maxmem = qemu_opt_get_size(opts, "maxmem", my_ram_size);
+ ram_addr_t standby_mem_size = maxmem - my_ram_size;
+ uint64_t kvm_limit;
+
+ /* The storage increment size is a multiple of 1M and is a power of 2.
+ * The number of storage increments must be MAX_STORAGE_INCREMENTS or fewer.
+ * The variable 'mhd->increment_size' is an exponent of 2 that can be
+ * used to calculate the size (in bytes) of an increment. */
+ mhd->increment_size = 20;
+ while ((my_ram_size >> mhd->increment_size) > MAX_STORAGE_INCREMENTS) {
+ mhd->increment_size++;
+ }
+ while ((standby_mem_size >> mhd->increment_size) > MAX_STORAGE_INCREMENTS) {
+ mhd->increment_size++;
+ }
+
+ /* The core and standby memory areas need to be aligned with
+ * the increment size. In effect, this can cause the
+ * user-specified memory size to be rounded down to align
+ * with the nearest increment boundary. */
+ standby_mem_size = standby_mem_size >> mhd->increment_size
+ << mhd->increment_size;
+ my_ram_size = my_ram_size >> mhd->increment_size
+ << mhd->increment_size;
+
+ /* let's propagate the changed ram size into the global variable. */
+ ram_size = my_ram_size;
+ machine->maxram_size = my_ram_size + standby_mem_size;
+
+ ret = s390_set_memory_limit(machine->maxram_size, &kvm_limit);
+ if (ret == -E2BIG) {
+ hw_error("qemu: host supports a maximum of %" PRIu64 " GB",
+ kvm_limit >> 30);
+ } else if (ret) {
+ hw_error("qemu: setting the guest size failed");
+ }
+
+ /* get a BUS */
+ css_bus = virtual_css_bus_init();
+ s390_sclp_init();
+ s390_init_ipl_dev(machine->kernel_filename, machine->kernel_cmdline,
+ machine->initrd_filename, "s390-ccw.img", true);
+ s390_flic_init();
+
+ dev = qdev_create(NULL, TYPE_S390_PCI_HOST_BRIDGE);
+ object_property_add_child(qdev_get_machine(), TYPE_S390_PCI_HOST_BRIDGE,
+ OBJECT(dev), NULL);
+ qdev_init_nofail(dev);
+
+ /* register hypercalls */
+ virtio_ccw_register_hcalls();
+
+ /* allocate RAM for core */
+ memory_region_init_ram(ram, NULL, "s390.ram", my_ram_size, &error_abort);
+ vmstate_register_ram_global(ram);
+ memory_region_add_subregion(sysmem, 0, ram);
+
+ /* If the size of ram is not on a MEM_SECTION_SIZE boundary,
+ calculate the pad size necessary to force this boundary. */
+ if (standby_mem_size) {
+ if (my_ram_size % MEM_SECTION_SIZE) {
+ pad_size = MEM_SECTION_SIZE - my_ram_size % MEM_SECTION_SIZE;
+ }
+ my_ram_size += standby_mem_size + pad_size;
+ mhd->pad_size = pad_size;
+ mhd->standby_mem_size = standby_mem_size;
+ }
+
+ /* allocate storage keys */
+ storage_keys = g_malloc0(my_ram_size / TARGET_PAGE_SIZE);
+
+ /* init CPUs */
+ s390_init_cpus(machine->cpu_model, storage_keys);
+
+ if (kvm_enabled()) {
+ kvm_s390_enable_css_support(s390_cpu_addr2state(0));
+ }
+ /*
+ * Create virtual css and set it as default so that non mcss-e
+ * enabled guests only see virtio devices.
+ */
+ ret = css_create_css_image(VIRTUAL_CSSID, true);
+ assert(ret == 0);
+
+ /* Create VirtIO network adapters */
+ s390_create_virtio_net(BUS(css_bus), "virtio-net-ccw");
+
+ /* Register savevm handler for guest TOD clock */
+ register_savevm(NULL, "todclock", 0, 1,
+ gtod_save, gtod_load, kvm_state);
+}
+
+static void ccw_machine_class_init(ObjectClass *oc, void *data)
+{
+ MachineClass *mc = MACHINE_CLASS(oc);
+ NMIClass *nc = NMI_CLASS(oc);
+
+ mc->init = ccw_init;
+ mc->block_default_type = IF_VIRTIO;
+ mc->no_cdrom = 1;
+ mc->no_floppy = 1;
+ mc->no_serial = 1;
+ mc->no_parallel = 1;
+ mc->no_sdcard = 1;
+ mc->use_sclp = 1;
+ mc->max_cpus = 255;
+ nc->nmi_monitor_handler = s390_nmi;
+}
+
+static inline bool machine_get_aes_key_wrap(Object *obj, Error **errp)
+{
+ S390CcwMachineState *ms = S390_CCW_MACHINE(obj);
+
+ return ms->aes_key_wrap;
+}
+
+static inline void machine_set_aes_key_wrap(Object *obj, bool value,
+ Error **errp)
+{
+ S390CcwMachineState *ms = S390_CCW_MACHINE(obj);
+
+ ms->aes_key_wrap = value;
+}
+
+static inline bool machine_get_dea_key_wrap(Object *obj, Error **errp)
+{
+ S390CcwMachineState *ms = S390_CCW_MACHINE(obj);
+
+ return ms->dea_key_wrap;
+}
+
+static inline void machine_set_dea_key_wrap(Object *obj, bool value,
+ Error **errp)
+{
+ S390CcwMachineState *ms = S390_CCW_MACHINE(obj);
+
+ ms->dea_key_wrap = value;
+}
+
+static inline void s390_machine_initfn(Object *obj)
+{
+ object_property_add_bool(obj, "aes-key-wrap",
+ machine_get_aes_key_wrap,
+ machine_set_aes_key_wrap, NULL);
+ object_property_set_description(obj, "aes-key-wrap",
+ "enable/disable AES key wrapping using the CPACF wrapping key",
+ NULL);
+ object_property_set_bool(obj, true, "aes-key-wrap", NULL);
+
+ object_property_add_bool(obj, "dea-key-wrap",
+ machine_get_dea_key_wrap,
+ machine_set_dea_key_wrap, NULL);
+ object_property_set_description(obj, "dea-key-wrap",
+ "enable/disable DEA key wrapping using the CPACF wrapping key",
+ NULL);
+ object_property_set_bool(obj, true, "dea-key-wrap", NULL);
+}
+
+static const TypeInfo ccw_machine_info = {
+ .name = TYPE_S390_CCW_MACHINE,
+ .parent = TYPE_MACHINE,
+ .abstract = true,
+ .instance_size = sizeof(S390CcwMachineState),
+ .instance_init = s390_machine_initfn,
+ .class_init = ccw_machine_class_init,
+ .interfaces = (InterfaceInfo[]) {
+ { TYPE_NMI },
+ { }
+ },
+};
+
+static void ccw_machine_2_4_class_init(ObjectClass *oc, void *data)
+{
+ MachineClass *mc = MACHINE_CLASS(oc);
+
+ mc->name = "s390-ccw-virtio-2.4";
+ mc->alias = "s390-ccw-virtio";
+ mc->desc = "VirtIO-ccw based S390 machine v2.4";
+ mc->is_default = 1;
+}
+
+static const TypeInfo ccw_machine_2_4_info = {
+ .name = TYPE_S390_CCW_MACHINE "2.4",
+ .parent = TYPE_S390_CCW_MACHINE,
+ .class_init = ccw_machine_2_4_class_init,
+};
+
+static void ccw_machine_register_types(void)
+{
+ type_register_static(&ccw_machine_info);
+ type_register_static(&ccw_machine_2_4_info);
+}
+
+type_init(ccw_machine_register_types)
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-10 14:01:56 +0000