4 * Copyright (c) 2012 Avi Kivity, Gerd Hoffmann, Marcelo Tosatti
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
26 * This device is used to test KVM features specific to the x86 port, such
27 * as emulation, power management, interrupt routing, among others. It's meant
30 * qemu-system-x86_64 -device pc-testdev -serial stdio \
31 * -device isa-debug-exit,iobase=0xf4,iosize=0x4 \
32 * -kernel /home/lmr/Code/virt-test.git/kvm/unittests/msr.flat
34 * Where msr.flat is one of the KVM unittests, present on a separate repo,
35 * git://git.kernel.org/pub/scm/virt/kvm/kvm-unit-tests.git
38 #include "config-host.h"
39 #if defined(CONFIG_POSIX)
44 #include "hw/isa/isa.h"
46 #define IOMEM_LEN 0x10000
48 typedef struct PCTestdev
{
52 MemoryRegion ioport_byte
;
57 char iomem_buf
[IOMEM_LEN
];
60 #define TYPE_TESTDEV "pc-testdev"
61 #define TESTDEV(obj) \
62 OBJECT_CHECK(PCTestdev, (obj), TYPE_TESTDEV)
64 static void test_irq_line(void *opaque
, hwaddr addr
, uint64_t data
,
67 PCTestdev
*dev
= opaque
;
68 ISADevice
*isa
= ISA_DEVICE(dev
);
70 qemu_set_irq(isa_get_irq(isa
, addr
), !!data
);
73 static const MemoryRegionOps test_irq_ops
= {
74 .write
= test_irq_line
,
75 .valid
.min_access_size
= 1,
76 .valid
.max_access_size
= 1,
77 .endianness
= DEVICE_LITTLE_ENDIAN
,
80 static void test_ioport_write(void *opaque
, hwaddr addr
, uint64_t data
,
83 PCTestdev
*dev
= opaque
;
85 int start_bit
= (addr
& 3) * 8;
86 uint32_t mask
= ((uint32_t)-1 >> (32 - bits
)) << start_bit
;
87 dev
->ioport_data
&= ~mask
;
88 dev
->ioport_data
|= data
<< start_bit
;
91 static uint64_t test_ioport_read(void *opaque
, hwaddr addr
, unsigned len
)
93 PCTestdev
*dev
= opaque
;
95 int start_bit
= (addr
& 3) * 8;
96 uint32_t mask
= ((uint32_t)-1 >> (32 - bits
)) << start_bit
;
97 return (dev
->ioport_data
& mask
) >> start_bit
;
100 static const MemoryRegionOps test_ioport_ops
= {
101 .read
= test_ioport_read
,
102 .write
= test_ioport_write
,
103 .endianness
= DEVICE_LITTLE_ENDIAN
,
106 static const MemoryRegionOps test_ioport_byte_ops
= {
107 .read
= test_ioport_read
,
108 .write
= test_ioport_write
,
109 .valid
.min_access_size
= 1,
110 .valid
.max_access_size
= 4,
111 .impl
.min_access_size
= 1,
112 .impl
.max_access_size
= 1,
113 .endianness
= DEVICE_LITTLE_ENDIAN
,
116 static void test_flush_page(void *opaque
, hwaddr addr
, uint64_t data
,
120 void *a
= cpu_physical_memory_map(data
& ~0xffful
, &page
, 0);
122 /* We might not be able to get the full page, only mprotect what we actually
124 #if defined(CONFIG_POSIX)
125 mprotect(a
, page
, PROT_NONE
);
126 mprotect(a
, page
, PROT_READ
|PROT_WRITE
);
128 cpu_physical_memory_unmap(a
, page
, 0, 0);
131 static const MemoryRegionOps test_flush_ops
= {
132 .write
= test_flush_page
,
133 .valid
.min_access_size
= 4,
134 .valid
.max_access_size
= 4,
135 .endianness
= DEVICE_LITTLE_ENDIAN
,
138 static uint64_t test_iomem_read(void *opaque
, hwaddr addr
, unsigned len
)
140 PCTestdev
*dev
= opaque
;
142 memcpy(&ret
, &dev
->iomem_buf
[addr
], len
);
147 static void test_iomem_write(void *opaque
, hwaddr addr
, uint64_t val
,
150 PCTestdev
*dev
= opaque
;
151 memcpy(&dev
->iomem_buf
[addr
], &val
, len
);
152 dev
->iomem_buf
[addr
] = val
;
155 static const MemoryRegionOps test_iomem_ops
= {
156 .read
= test_iomem_read
,
157 .write
= test_iomem_write
,
158 .endianness
= DEVICE_LITTLE_ENDIAN
,
161 static void testdev_realizefn(DeviceState
*d
, Error
**errp
)
163 ISADevice
*isa
= ISA_DEVICE(d
);
164 PCTestdev
*dev
= TESTDEV(d
);
165 MemoryRegion
*mem
= isa_address_space(isa
);
166 MemoryRegion
*io
= isa_address_space_io(isa
);
168 memory_region_init_io(&dev
->ioport
, OBJECT(dev
), &test_ioport_ops
, dev
,
169 "pc-testdev-ioport", 4);
170 memory_region_init_io(&dev
->ioport_byte
, OBJECT(dev
),
171 &test_ioport_byte_ops
, dev
,
172 "pc-testdev-ioport-byte", 4);
173 memory_region_init_io(&dev
->flush
, OBJECT(dev
), &test_flush_ops
, dev
,
174 "pc-testdev-flush-page", 4);
175 memory_region_init_io(&dev
->irq
, OBJECT(dev
), &test_irq_ops
, dev
,
176 "pc-testdev-irq-line", 24);
177 memory_region_init_io(&dev
->iomem
, OBJECT(dev
), &test_iomem_ops
, dev
,
178 "pc-testdev-iomem", IOMEM_LEN
);
180 memory_region_add_subregion(io
, 0xe0, &dev
->ioport
);
181 memory_region_add_subregion(io
, 0xe4, &dev
->flush
);
182 memory_region_add_subregion(io
, 0xe8, &dev
->ioport_byte
);
183 memory_region_add_subregion(io
, 0x2000, &dev
->irq
);
184 memory_region_add_subregion(mem
, 0xff000000, &dev
->iomem
);
187 static void testdev_class_init(ObjectClass
*klass
, void *data
)
189 DeviceClass
*dc
= DEVICE_CLASS(klass
);
191 dc
->realize
= testdev_realizefn
;
194 static const TypeInfo testdev_info
= {
195 .name
= TYPE_TESTDEV
,
196 .parent
= TYPE_ISA_DEVICE
,
197 .instance_size
= sizeof(PCTestdev
),
198 .class_init
= testdev_class_init
,
201 static void testdev_register_types(void)
203 type_register_static(&testdev_info
);
206 type_init(testdev_register_types
)