diff options
| -rw-r--r-- | hw/i386/Makefile.objs | 1 | ||||
| -rw-r--r-- | hw/pc-testdev.c | 182 |
2 files changed, 183 insertions, 0 deletions
diff --git a/hw/i386/Makefile.objs b/hw/i386/Makefile.objs index 2ba04db..025803a 100644 --- a/hw/i386/Makefile.objs +++ b/hw/i386/Makefile.objs @@ -12,5 +12,6 @@ obj-$(CONFIG_XEN_PCI_PASSTHROUGH) += xen-host-pci-device.o obj-$(CONFIG_XEN_PCI_PASSTHROUGH) += xen_pt.o xen_pt_config_init.o xen_pt_msi.o obj-y += kvm/ obj-$(CONFIG_SPICE) += qxl.o qxl-logger.o qxl-render.o +obj-y += pc-testdev.o obj-y := $(addprefix ../,$(obj-y)) diff --git a/hw/pc-testdev.c b/hw/pc-testdev.c new file mode 100644 index 0000000..620c86c --- /dev/null +++ b/hw/pc-testdev.c @@ -0,0 +1,182 @@ +/* + * QEMU x86 ISA testdev + * + * Copyright (c) 2012 Avi Kivity, Gerd Hoffmann, Marcelo Tosatti + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + */ + +/* + * This device is used to test KVM features specific to the x86 port, such + * as emulation, power management, interrupt routing, among others. It's meant + * to be used like: + * + * qemu-system-x86_64 -device pc-testdev -serial stdio \ + * -device isa-debug-exit,iobase=0xf4,iosize=0x4 \ + * -kernel /home/lmr/Code/virt-test.git/kvm/unittests/msr.flat + * + * Where msr.flat is one of the KVM unittests, present on a separate repo, + * git://git.kernel.org/pub/scm/virt/kvm/kvm-unit-tests.git +*/ + +#include <sys/mman.h> +#include "hw.h" +#include "qdev.h" +#include "isa.h" + +#define IOMEM_LEN 0x10000 + +typedef struct PCTestdev { + ISADevice parent_obj; + + MemoryRegion ioport; + MemoryRegion flush; + MemoryRegion irq; + MemoryRegion iomem; + uint32_t ioport_data; + char iomem_buf[IOMEM_LEN]; +} PCTestdev; + +#define TYPE_TESTDEV "pc-testdev" +#define TESTDEV(obj) \ + OBJECT_CHECK(struct PCTestdev, (obj), TYPE_TESTDEV) + +static void test_irq_line(void *opaque, hwaddr addr, uint64_t data, + unsigned len) +{ + struct PCTestdev *dev = opaque; + struct ISADevice *isa = ISA_DEVICE(dev); + + qemu_set_irq(isa_get_irq(isa, addr), !!data); +} + +static const MemoryRegionOps test_irq_ops = { + .write = test_irq_line, + .valid.min_access_size = 1, + .valid.max_access_size = 1, + .endianness = DEVICE_LITTLE_ENDIAN, +}; + +static void test_ioport_write(void *opaque, hwaddr addr, uint64_t data, + unsigned len) +{ + struct PCTestdev *dev = opaque; + dev->ioport_data = data; +} + +static uint64_t test_ioport_read(void *opaque, hwaddr addr, unsigned len) +{ + struct PCTestdev *dev = opaque; + return dev->ioport_data; +} + +static const MemoryRegionOps test_ioport_ops = { + .read = test_ioport_read, + .write = test_ioport_write, + .endianness = DEVICE_LITTLE_ENDIAN, +}; + +static void test_flush_page(void *opaque, hwaddr addr, uint64_t data, + unsigned len) +{ + hwaddr page = 4096; + void *a = cpu_physical_memory_map(data & ~0xffful, &page, 0); + + /* We might not be able to get the full page, only mprotect what we actually + have mapped */ + mprotect(a, page, PROT_NONE); + mprotect(a, page, PROT_READ|PROT_WRITE); + cpu_physical_memory_unmap(a, page, 0, 0); +} + +static const MemoryRegionOps test_flush_ops = { + .write = test_flush_page, + .valid.min_access_size = 4, + .valid.max_access_size = 4, + .endianness = DEVICE_LITTLE_ENDIAN, +}; + +static uint64_t test_iomem_read(void *opaque, hwaddr addr, unsigned len) +{ + struct PCTestdev *dev = opaque; + uint64_t ret = 0; + memcpy(&ret, &dev->iomem_buf[addr], len); + ret = le64_to_cpu(ret); + + return ret; +} + +static void test_iomem_write(void *opaque, hwaddr addr, uint64_t val, + unsigned len) +{ + struct PCTestdev *dev = opaque; + val = cpu_to_le64(val); + memcpy(&dev->iomem_buf[addr], &val, len); + dev->iomem_buf[addr] = val; +} + +static const MemoryRegionOps test_iomem_ops = { + .read = test_iomem_read, + .write = test_iomem_write, + .endianness = DEVICE_LITTLE_ENDIAN, +}; + +static int init_test_device(ISADevice *isa) +{ + struct PCTestdev *dev = TESTDEV(isa); + MemoryRegion *mem = isa_address_space(isa); + MemoryRegion *io = isa_address_space_io(isa); + + memory_region_init_io(&dev->ioport, &test_ioport_ops, dev, + "pc-testdev-ioport", 4); + memory_region_init_io(&dev->flush, &test_flush_ops, dev, + "pc-testdev-flush-page", 4); + memory_region_init_io(&dev->irq, &test_irq_ops, dev, + "pc-testdev-irq-line", 24); + memory_region_init_io(&dev->iomem, &test_iomem_ops, dev, + "pc-testdev-iomem", IOMEM_LEN); + + memory_region_add_subregion(io, 0xe0, &dev->ioport); + memory_region_add_subregion(io, 0xe4, &dev->flush); + memory_region_add_subregion(io, 0x2000, &dev->irq); + memory_region_add_subregion(mem, 0xff000000, &dev->iomem); + + return 0; +} + +static void testdev_class_init(ObjectClass *klass, void *data) +{ + ISADeviceClass *k = ISA_DEVICE_CLASS(klass); + + k->init = init_test_device; +} + +static TypeInfo testdev_info = { + .name = TYPE_TESTDEV, + .parent = TYPE_ISA_DEVICE, + .instance_size = sizeof(struct PCTestdev), + .class_init = testdev_class_init, +}; + +static void testdev_register_types(void) +{ + type_register_static(&testdev_info); +} + +type_init(testdev_register_types) |