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9700230b0d
qemu/hw/s390x/s390-virtio-ccw.c
Fan Zhang 9700230b0d s390x: enable runtime instrumentation 
Introduce run-time-instrumentation support when running under kvm for
virtio-ccw 2.7 machine and make sure older machines can not enable it.

The new ri_allowed field in the s390MachineClass serves as an indicator
whether the feature can be used by the machine and should therefore be
activated if available.

riccb_needed() is used to check whether riccb is needed or not in live
migration.

Signed-off-by: Fan Zhang <zhangfan@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2016-05-17 15:50:29 +02:00

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/*
* 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 "qemu/osdep.h"
#include "qapi/error.h"
#include "qemu-common.h"
#include "cpu.h"
#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"
#include "hw/s390x/storage-keys.h"
#include "hw/compat.h"
#include "hw/s390x/s390-virtio-ccw.h"
static const char *const reset_dev_types[] = {
"virtual-css-bridge",
"s390-sclp-event-facility",
"s390-flic",
"diag288",
};
void subsystem_reset(void)
{
DeviceState *dev;
int i;
for (i = 0; i < ARRAY_SIZE(reset_dev_types); i++) {
dev = DEVICE(object_resolve_path_type("", reset_dev_types[i], NULL));
if (dev) {
qdev_reset_all(dev);
}
}
}
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);
}
void s390_memory_init(ram_addr_t mem_size)
{
MemoryRegion *sysmem = get_system_memory();
MemoryRegion *ram = g_new(MemoryRegion, 1);
/* allocate RAM for core */
memory_region_allocate_system_memory(ram, NULL, "s390.ram", mem_size);
memory_region_add_subregion(sysmem, 0, ram);
/* Initialize storage key device */
s390_skeys_init();
}
static void ccw_init(MachineState *machine)
{
int ret;
VirtualCssBus *css_bus;
DeviceState *dev;
s390_sclp_init();
s390_memory_init(machine->ram_size);
/* get a BUS */
css_bus = virtual_css_bus_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();
/* init CPUs */
s390_init_cpus(machine);
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 s390_cpu_plug(HotplugHandler *hotplug_dev,
DeviceState *dev, Error **errp)
{
gchar *name;
S390CPU *cpu = S390_CPU(dev);
CPUState *cs = CPU(dev);
name = g_strdup_printf("cpu[%i]", cpu->env.cpu_num);
object_property_set_link(OBJECT(hotplug_dev), OBJECT(cs), name,
errp);
g_free(name);
}
static void s390_machine_device_plug(HotplugHandler *hotplug_dev,
DeviceState *dev, Error **errp)
{
if (object_dynamic_cast(OBJECT(dev), TYPE_CPU)) {
s390_cpu_plug(hotplug_dev, dev, errp);
}
}
static HotplugHandler *s390_get_hotplug_handler(MachineState *machine,
DeviceState *dev)
{
if (object_dynamic_cast(OBJECT(dev), TYPE_CPU)) {
return HOTPLUG_HANDLER(machine);
}
return NULL;
}
static void s390_hot_add_cpu(const int64_t id, Error **errp)
{
MachineState *machine = MACHINE(qdev_get_machine());
Error *err = NULL;
s390x_new_cpu(machine->cpu_model, id, &err);
error_propagate(errp, err);
}
static void ccw_machine_class_init(ObjectClass *oc, void *data)
{
MachineClass *mc = MACHINE_CLASS(oc);
NMIClass *nc = NMI_CLASS(oc);
HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(oc);
S390CcwMachineClass *s390mc = S390_MACHINE_CLASS(mc);
s390mc->ri_allowed = true;
mc->init = ccw_init;
mc->reset = s390_machine_reset;
mc->hot_add_cpu = s390_hot_add_cpu;
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;
mc->get_hotplug_handler = s390_get_hotplug_handler;
hc->plug = s390_machine_device_plug;
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;
}
bool ri_allowed(void)
{
if (kvm_enabled()) {
MachineClass *mc = MACHINE_GET_CLASS(qdev_get_machine());
if (object_class_dynamic_cast(OBJECT_CLASS(mc),
TYPE_S390_CCW_MACHINE)) {
S390CcwMachineClass *s390mc = S390_MACHINE_CLASS(mc);
return s390mc->ri_allowed;
}
}
return 0;
}
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_size = sizeof(S390CcwMachineClass),
.class_init = ccw_machine_class_init,
.interfaces = (InterfaceInfo[]) {
{ TYPE_NMI },
{ TYPE_HOTPLUG_HANDLER},
{ }
},
};
#define DEFINE_CCW_MACHINE(suffix, verstr, latest) \
static void ccw_machine_##suffix##_class_init(ObjectClass *oc, \
void *data) \
{ \
MachineClass *mc = MACHINE_CLASS(oc); \
ccw_machine_##suffix##_class_options(mc); \
mc->desc = "VirtIO-ccw based S390 machine v" verstr; \
if (latest) { \
mc->alias = "s390-ccw-virtio"; \
mc->is_default = 1; \
} \
} \
static void ccw_machine_##suffix##_instance_init(Object *obj) \
{ \
MachineState *machine = MACHINE(obj); \
ccw_machine_##suffix##_instance_options(machine); \
} \
static const TypeInfo ccw_machine_##suffix##_info = { \
.name = MACHINE_TYPE_NAME("s390-ccw-virtio-" verstr), \
.parent = TYPE_S390_CCW_MACHINE, \
.class_init = ccw_machine_##suffix##_class_init, \
.instance_init = ccw_machine_##suffix##_instance_init, \
}; \
static void ccw_machine_register_##suffix(void) \
{ \
type_register_static(&ccw_machine_##suffix##_info); \
} \
type_init(ccw_machine_register_##suffix)
#define CCW_COMPAT_2_6 \
HW_COMPAT_2_6
#define CCW_COMPAT_2_5 \
CCW_COMPAT_2_6 \
HW_COMPAT_2_5
#define CCW_COMPAT_2_4 \
CCW_COMPAT_2_5 \
HW_COMPAT_2_4 \
{\
.driver = TYPE_S390_SKEYS,\
.property = "migration-enabled",\
.value = "off",\
},{\
.driver = "virtio-blk-ccw",\
.property = "max_revision",\
.value = "0",\
},{\
.driver = "virtio-balloon-ccw",\
.property = "max_revision",\
.value = "0",\
},{\
.driver = "virtio-serial-ccw",\
.property = "max_revision",\
.value = "0",\
},{\
.driver = "virtio-9p-ccw",\
.property = "max_revision",\
.value = "0",\
},{\
.driver = "virtio-rng-ccw",\
.property = "max_revision",\
.value = "0",\
},{\
.driver = "virtio-net-ccw",\
.property = "max_revision",\
.value = "0",\
},{\
.driver = "virtio-scsi-ccw",\
.property = "max_revision",\
.value = "0",\
},{\
.driver = "vhost-scsi-ccw",\
.property = "max_revision",\
.value = "0",\
},
static void ccw_machine_2_7_instance_options(MachineState *machine)
{
}
static void ccw_machine_2_7_class_options(MachineClass *mc)
{
}
DEFINE_CCW_MACHINE(2_7, "2.7", true);
static void ccw_machine_2_6_instance_options(MachineState *machine)
{
ccw_machine_2_7_instance_options(machine);
}
static void ccw_machine_2_6_class_options(MachineClass *mc)
{
S390CcwMachineClass *s390mc = S390_MACHINE_CLASS(mc);
s390mc->ri_allowed = false;
ccw_machine_2_7_class_options(mc);
SET_MACHINE_COMPAT(mc, CCW_COMPAT_2_6);
}
DEFINE_CCW_MACHINE(2_6, "2.6", false);
static void ccw_machine_2_5_instance_options(MachineState *machine)
{
ccw_machine_2_6_instance_options(machine);
}
static void ccw_machine_2_5_class_options(MachineClass *mc)
{
ccw_machine_2_6_class_options(mc);
SET_MACHINE_COMPAT(mc, CCW_COMPAT_2_5);
}
DEFINE_CCW_MACHINE(2_5, "2.5", false);
static void ccw_machine_2_4_instance_options(MachineState *machine)
{
ccw_machine_2_5_instance_options(machine);
}
static void ccw_machine_2_4_class_options(MachineClass *mc)
{
ccw_machine_2_5_class_options(mc);
SET_MACHINE_COMPAT(mc, CCW_COMPAT_2_4);
}
DEFINE_CCW_MACHINE(2_4, "2.4", false);
static void ccw_machine_register_types(void)
{
type_register_static(&ccw_machine_info);
}
type_init(ccw_machine_register_types)
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