root / hw / pc-testdev.c @ 0d09e41a
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/*
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* QEMU x86 ISA testdev
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*
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* Copyright (c) 2012 Avi Kivity, Gerd Hoffmann, Marcelo Tosatti
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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/*
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* This device is used to test KVM features specific to the x86 port, such
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* as emulation, power management, interrupt routing, among others. It's meant
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* to be used like:
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*
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* qemu-system-x86_64 -device pc-testdev -serial stdio \
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* -device isa-debug-exit,iobase=0xf4,iosize=0x4 \
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* -kernel /home/lmr/Code/virt-test.git/kvm/unittests/msr.flat
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*
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* Where msr.flat is one of the KVM unittests, present on a separate repo,
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* git://git.kernel.org/pub/scm/virt/kvm/kvm-unit-tests.git
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*/
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#include "config-host.h" |
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#if defined(CONFIG_POSIX)
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#include <sys/mman.h> |
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#endif
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#include "hw/hw.h" |
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#include "hw/qdev.h" |
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#include "hw/isa/isa.h" |
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#define IOMEM_LEN 0x10000 |
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typedef struct PCTestdev { |
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ISADevice parent_obj; |
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MemoryRegion ioport; |
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MemoryRegion flush; |
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MemoryRegion irq; |
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MemoryRegion iomem; |
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uint32_t ioport_data; |
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char iomem_buf[IOMEM_LEN];
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} PCTestdev; |
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#define TYPE_TESTDEV "pc-testdev" |
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#define TESTDEV(obj) \
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OBJECT_CHECK(PCTestdev, (obj), TYPE_TESTDEV) |
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static void test_irq_line(void *opaque, hwaddr addr, uint64_t data, |
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unsigned len)
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{ |
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PCTestdev *dev = opaque; |
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ISADevice *isa = ISA_DEVICE(dev); |
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qemu_set_irq(isa_get_irq(isa, addr), !!data); |
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} |
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static const MemoryRegionOps test_irq_ops = { |
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.write = test_irq_line, |
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.valid.min_access_size = 1,
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.valid.max_access_size = 1,
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.endianness = DEVICE_LITTLE_ENDIAN, |
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}; |
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static void test_ioport_write(void *opaque, hwaddr addr, uint64_t data, |
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unsigned len)
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{ |
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PCTestdev *dev = opaque; |
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dev->ioport_data = data; |
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} |
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static uint64_t test_ioport_read(void *opaque, hwaddr addr, unsigned len) |
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{ |
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PCTestdev *dev = opaque; |
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return dev->ioport_data;
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} |
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static const MemoryRegionOps test_ioport_ops = { |
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.read = test_ioport_read, |
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.write = test_ioport_write, |
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.endianness = DEVICE_LITTLE_ENDIAN, |
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}; |
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static void test_flush_page(void *opaque, hwaddr addr, uint64_t data, |
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unsigned len)
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{ |
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hwaddr page = 4096;
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void *a = cpu_physical_memory_map(data & ~0xffful, &page, 0); |
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/* We might not be able to get the full page, only mprotect what we actually
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have mapped */
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#if defined(CONFIG_POSIX)
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mprotect(a, page, PROT_NONE); |
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mprotect(a, page, PROT_READ|PROT_WRITE); |
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#endif
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cpu_physical_memory_unmap(a, page, 0, 0); |
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} |
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static const MemoryRegionOps test_flush_ops = { |
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.write = test_flush_page, |
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.valid.min_access_size = 4,
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.valid.max_access_size = 4,
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.endianness = DEVICE_LITTLE_ENDIAN, |
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}; |
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static uint64_t test_iomem_read(void *opaque, hwaddr addr, unsigned len) |
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{ |
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PCTestdev *dev = opaque; |
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uint64_t ret = 0;
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memcpy(&ret, &dev->iomem_buf[addr], len); |
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ret = le64_to_cpu(ret); |
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return ret;
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} |
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static void test_iomem_write(void *opaque, hwaddr addr, uint64_t val, |
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unsigned len)
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{ |
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PCTestdev *dev = opaque; |
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val = cpu_to_le64(val); |
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memcpy(&dev->iomem_buf[addr], &val, len); |
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dev->iomem_buf[addr] = val; |
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} |
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static const MemoryRegionOps test_iomem_ops = { |
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.read = test_iomem_read, |
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.write = test_iomem_write, |
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.endianness = DEVICE_LITTLE_ENDIAN, |
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}; |
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static int init_test_device(ISADevice *isa) |
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{ |
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PCTestdev *dev = TESTDEV(isa); |
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MemoryRegion *mem = isa_address_space(isa); |
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MemoryRegion *io = isa_address_space_io(isa); |
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memory_region_init_io(&dev->ioport, &test_ioport_ops, dev, |
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"pc-testdev-ioport", 4); |
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memory_region_init_io(&dev->flush, &test_flush_ops, dev, |
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"pc-testdev-flush-page", 4); |
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memory_region_init_io(&dev->irq, &test_irq_ops, dev, |
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"pc-testdev-irq-line", 24); |
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memory_region_init_io(&dev->iomem, &test_iomem_ops, dev, |
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"pc-testdev-iomem", IOMEM_LEN);
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memory_region_add_subregion(io, 0xe0, &dev->ioport);
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memory_region_add_subregion(io, 0xe4, &dev->flush);
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memory_region_add_subregion(io, 0x2000, &dev->irq);
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memory_region_add_subregion(mem, 0xff000000, &dev->iomem);
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return 0; |
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} |
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static void testdev_class_init(ObjectClass *klass, void *data) |
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{ |
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ISADeviceClass *k = ISA_DEVICE_CLASS(klass); |
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k->init = init_test_device; |
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} |
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static const TypeInfo testdev_info = { |
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.name = TYPE_TESTDEV, |
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.parent = TYPE_ISA_DEVICE, |
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.instance_size = sizeof(PCTestdev),
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.class_init = testdev_class_init, |
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}; |
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static void testdev_register_types(void) |
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{ |
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type_register_static(&testdev_info); |
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} |
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type_init(testdev_register_types) |