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/*
* QEMU KVM Hyper-V test device to support Hyper-V kvm-unit-tests
*
* Copyright (C) 2015 Andrey Smetanin <asmetanin@virtuozzo.com>
*
* Authors:
* Andrey Smetanin <asmetanin@virtuozzo.com>
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*
*/
#include "qemu/osdep.h"
#include <linux/kvm.h>
#include "hw/hw.h"
#include "hw/qdev.h"
#include "hw/isa/isa.h"
#include "sysemu/kvm.h"
#include "target/i386/hyperv.h"
#include "kvm_i386.h"
#define HV_TEST_DEV_MAX_SINT_ROUTES 64
struct HypervTestDev {
ISADevice parent_obj;
MemoryRegion sint_control;
HvSintRoute *sint_route[HV_TEST_DEV_MAX_SINT_ROUTES];
};
typedef struct HypervTestDev HypervTestDev;
#define TYPE_HYPERV_TEST_DEV "hyperv-testdev"
#define HYPERV_TEST_DEV(obj) \
OBJECT_CHECK(HypervTestDev, (obj), TYPE_HYPERV_TEST_DEV)
enum {
HV_TEST_DEV_SINT_ROUTE_CREATE = 1,
HV_TEST_DEV_SINT_ROUTE_DESTROY,
HV_TEST_DEV_SINT_ROUTE_SET_SINT
};
static int alloc_sint_route_index(HypervTestDev *dev)
{
int i;
for (i = 0; i < ARRAY_SIZE(dev->sint_route); i++) {
if (dev->sint_route[i] == NULL) {
return i;
}
}
return -1;
}
static void free_sint_route_index(HypervTestDev *dev, int i)
{
assert(i >= 0 && i < ARRAY_SIZE(dev->sint_route));
dev->sint_route[i] = NULL;
}
static int find_sint_route_index(HypervTestDev *dev, uint32_t vp_index,
uint32_t sint)
{
HvSintRoute *sint_route;
int i;
for (i = 0; i < ARRAY_SIZE(dev->sint_route); i++) {
sint_route = dev->sint_route[i];
if (sint_route && sint_route->vp_index == vp_index &&
sint_route->sint == sint) {
return i;
}
}
return -1;
}
static void hv_synic_test_dev_control(HypervTestDev *dev, uint32_t ctl,
uint32_t vp_index, uint32_t sint)
{
int i;
HvSintRoute *sint_route;
switch (ctl) {
case HV_TEST_DEV_SINT_ROUTE_CREATE:
i = alloc_sint_route_index(dev);
assert(i >= 0);
sint_route = kvm_hv_sint_route_create(vp_index, sint, NULL);
assert(sint_route);
dev->sint_route[i] = sint_route;
break;
case HV_TEST_DEV_SINT_ROUTE_DESTROY:
i = find_sint_route_index(dev, vp_index, sint);
assert(i >= 0);
sint_route = dev->sint_route[i];
kvm_hv_sint_route_destroy(sint_route);
free_sint_route_index(dev, i);
break;
case HV_TEST_DEV_SINT_ROUTE_SET_SINT:
i = find_sint_route_index(dev, vp_index, sint);
assert(i >= 0);
sint_route = dev->sint_route[i];
kvm_hv_sint_route_set_sint(sint_route);
break;
default:
break;
}
}
static uint64_t hv_test_dev_read(void *opaque, hwaddr addr, unsigned size)
{
return 0;
}
static void hv_test_dev_write(void *opaque, hwaddr addr, uint64_t data,
uint32_t len)
{
HypervTestDev *dev = HYPERV_TEST_DEV(opaque);
uint8_t ctl;
ctl = (data >> 16ULL) & 0xFF;
switch (ctl) {
case HV_TEST_DEV_SINT_ROUTE_CREATE:
case HV_TEST_DEV_SINT_ROUTE_DESTROY:
case HV_TEST_DEV_SINT_ROUTE_SET_SINT: {
uint8_t sint = data & 0xFF;
uint8_t vp_index = (data >> 8ULL) & 0xFF;
hv_synic_test_dev_control(dev, ctl, vp_index, sint);
break;
}
default:
break;
}
}
static const MemoryRegionOps synic_test_sint_ops = {
.read = hv_test_dev_read,
.write = hv_test_dev_write,
.valid.min_access_size = 4,
.valid.max_access_size = 4,
.endianness = DEVICE_LITTLE_ENDIAN,
};
static void hv_test_dev_realizefn(DeviceState *d, Error **errp)
{
ISADevice *isa = ISA_DEVICE(d);
HypervTestDev *dev = HYPERV_TEST_DEV(d);
MemoryRegion *io = isa_address_space_io(isa);
memset(dev->sint_route, 0, sizeof(dev->sint_route));
memory_region_init_io(&dev->sint_control, OBJECT(dev),
&synic_test_sint_ops, dev,
"hyperv-testdev-ctl", 4);
memory_region_add_subregion(io, 0x3000, &dev->sint_control);
}
static void hv_test_dev_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
set_bit(DEVICE_CATEGORY_MISC, dc->categories);
dc->realize = hv_test_dev_realizefn;
}
static const TypeInfo hv_test_dev_info = {
.name = TYPE_HYPERV_TEST_DEV,
.parent = TYPE_ISA_DEVICE,
.instance_size = sizeof(HypervTestDev),
.class_init = hv_test_dev_class_init,
};
static void hv_test_dev_register_types(void)
{
type_register_static(&hv_test_dev_info);
}
type_init(hv_test_dev_register_types);
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