/* * QEMU i440FX/PIIX3 PCI Bridge Emulation * * Copyright (c) 2006 Fabrice Bellard * * 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. */ #include "qemu/osdep.h" #include "hw/hw.h" #include "hw/i386/pc.h" #include "hw/pci/pci.h" #include "hw/pci/pci_host.h" #include "hw/isa/isa.h" #include "hw/sysbus.h" #include "qapi/error.h" #include "qemu/range.h" #include "hw/xen/xen.h" #include "hw/pci-host/pam.h" #include "sysemu/sysemu.h" #include "hw/i386/ioapic.h" #include "qapi/visitor.h" #include "qemu/error-report.h" /* * I440FX chipset data sheet. * http://download.intel.com/design/chipsets/datashts/29054901.pdf */ #define I440FX_PCI_HOST_BRIDGE(obj) \ OBJECT_CHECK(I440FXState, (obj), TYPE_I440FX_PCI_HOST_BRIDGE) typedef struct I440FXState { PCIHostState parent_obj; Range pci_hole; uint64_t pci_hole64_size; uint32_t short_root_bus; } I440FXState; #define PIIX_NUM_PIC_IRQS 16 /* i8259 * 2 */ #define PIIX_NUM_PIRQS 4ULL /* PIRQ[A-D] */ #define XEN_PIIX_NUM_PIRQS 128ULL #define PIIX_PIRQC 0x60 typedef struct PIIX3State { PCIDevice dev; /* * bitmap to track pic levels. * The pic level is the logical OR of all the PCI irqs mapped to it * So one PIC level is tracked by PIIX_NUM_PIRQS bits. * * PIRQ is mapped to PIC pins, we track it by * PIIX_NUM_PIRQS * PIIX_NUM_PIC_IRQS = 64 bits with * pic_irq * PIIX_NUM_PIRQS + pirq */ #if PIIX_NUM_PIC_IRQS * PIIX_NUM_PIRQS > 64 #error "unable to encode pic state in 64bit in pic_levels." #endif uint64_t pic_levels; qemu_irq *pic; /* This member isn't used. Just for save/load compatibility */ int32_t pci_irq_levels_vmstate[PIIX_NUM_PIRQS]; /* Reset Control Register contents */ uint8_t rcr; /* IO memory region for Reset Control Register (RCR_IOPORT) */ MemoryRegion rcr_mem; } PIIX3State; #define TYPE_PIIX3_PCI_DEVICE "pci-piix3" #define PIIX3_PCI_DEVICE(obj) \ OBJECT_CHECK(PIIX3State, (obj), TYPE_PIIX3_PCI_DEVICE) #define I440FX_PCI_DEVICE(obj) \ OBJECT_CHECK(PCII440FXState, (obj), TYPE_I440FX_PCI_DEVICE) struct PCII440FXState { /*< private >*/ PCIDevice parent_obj; /*< public >*/ MemoryRegion *system_memory; MemoryRegion *pci_address_space; MemoryRegion *ram_memory; PAMMemoryRegion pam_regions[13]; MemoryRegion smram_region; MemoryRegion smram, low_smram; }; #define I440FX_PAM 0x59 #define I440FX_PAM_SIZE 7 #define I440FX_SMRAM 0x72 /* Older coreboot versions (4.0 and older) read a config register that doesn't * exist in real hardware, to get the RAM size from QEMU. */ #define I440FX_COREBOOT_RAM_SIZE 0x57 static void piix3_set_irq(void *opaque, int pirq, int level); static PCIINTxRoute piix3_route_intx_pin_to_irq(void *opaque, int pci_intx); static void piix3_write_config_xen(PCIDevice *dev, uint32_t address, uint32_t val, int len); /* return the global irq number corresponding to a given device irq pin. We could also use the bus number to have a more precise mapping. */ static int pci_slot_get_pirq(PCIDevice *pci_dev, int pci_intx) { int slot_addend; slot_addend = (pci_dev->devfn >> 3) - 1; return (pci_intx + slot_addend) & 3; } static void i440fx_update_memory_mappings(PCII440FXState *d) { int i; PCIDevice *pd = PCI_DEVICE(d); memory_region_transaction_begin(); for (i = 0; i < 13; i++) { pam_update(&d->pam_regions[i], i, pd->config[I440FX_PAM + ((i + 1) / 2)]); } memory_region_set_enabled(&d->smram_region, !(pd->config[I440FX_SMRAM] & SMRAM_D_OPEN)); memory_region_set_enabled(&d->smram, pd->config[I440FX_SMRAM] & SMRAM_G_SMRAME); memory_region_transaction_commit(); } static void i440fx_write_config(PCIDevice *dev, uint32_t address, uint32_t val, int len) { PCII440FXState *d = I440FX_PCI_DEVICE(dev); /* XXX: implement SMRAM.D_LOCK */ pci_default_write_config(dev, address, val, len); if (ranges_overlap(address, len, I440FX_PAM, I440FX_PAM_SIZE) || range_covers_byte(address, len, I440FX_SMRAM)) { i440fx_update_memory_mappings(d); } } static int i440fx_load_old(QEMUFile* f, void *opaque, int version_id) { PCII440FXState *d = opaque; PCIDevice *pd = PCI_DEVICE(d); int ret, i; uint8_t smm_enabled; ret = pci_device_load(pd, f); if (ret < 0) return ret; i440fx_update_memory_mappings(d); qemu_get_8s(f, &smm_enabled); if (version_id == 2) { for (i = 0; i < PIIX_NUM_PIRQS; i++) { qemu_get_be32(f); /* dummy load for compatibility */ } } return 0; } static int i440fx_post_load(void *opaque, int version_id) { PCII440FXState *d = opaque; i440fx_update_memory_mappings(d); return 0; } static const VMStateDescription vmstate_i440fx = { .name = "I440FX", .version_id = 3, .minimum_version_id = 3, .minimum_version_id_old = 1, .load_state_old = i440fx_load_old, .post_load = i440fx_post_load, .fields = (VMStateField[]) { VMSTATE_PCI_DEVICE(parent_obj, PCII440FXState), /* Used to be smm_enabled, which was basically always zero because * SeaBIOS hardly uses SMM. SMRAM is now handled by CPU code. */ VMSTATE_UNUSED(1), VMSTATE_END_OF_LIST() } }; static void i440fx_pcihost_get_pci_hole_start(Object *obj, Visitor *v, const char *name, void *opaque, Error **errp) { I440FXState *s = I440FX_PCI_HOST_BRIDGE(obj); uint64_t val64; uint32_t value; val64 = range_is_empty(&s->pci_hole) ? 0 : range_lob(&s->pci_hole); value = val64; assert(value == val64); visit_type_uint32(v, name, &value, errp); } static void i440fx_pcihost_get_pci_hole_end(Object *obj, Visitor *v, const char *name, void *opaque, Error **errp) { I440FXState *s = I440FX_PCI_HOST_BRIDGE(obj); uint64_t val64; uint32_t value; val64 = range_is_empty(&s->pci_hole) ? 0 : range_upb(&s->pci_hole) + 1; value = val64; assert(value == val64); visit_type_uint32(v, name, &value, errp); } static void i440fx_pcihost_get_pci_hole64_start(Object *obj, Visitor *v, const char *name, void *opaque, Error **errp) { PCIHostState *h = PCI_HOST_BRIDGE(obj); Range w64; uint64_t value; pci_bus_get_w64_range(h->bus, &w64); value = range_is_empty(&w64) ? 0 : range_lob(&w64); visit_type_uint64(v, name, &value, errp); } static void i440fx_pcihost_get_pci_hole64_end(Object *obj, Visitor *v, const char *name, void *opaque, Error **errp) { PCIHostState *h = PCI_HOST_BRIDGE(obj); Range w64; uint64_t value; pci_bus_get_w64_range(h->bus, &w64); value = range_is_empty(&w64) ? 0 : range_upb(&w64) + 1; visit_type_uint64(v, name, &value, errp); } static void i440fx_pcihost_initfn(Object *obj) { PCIHostState *s = PCI_HOST_BRIDGE(obj); memory_region_init_io(&s->conf_mem, obj, &pci_host_conf_le_ops, s, "pci-conf-idx", 4); memory_region_init_io(&s->data_mem, obj, &pci_host_data_le_ops, s, "pci-conf-data", 4); object_property_add(obj, PCI_HOST_PROP_PCI_HOLE_START, "int", i440fx_pcihost_get_pci_hole_start, NULL, NULL, NULL, NULL); object_property_add(obj, PCI_HOST_PROP_PCI_HOLE_END, "int", i440fx_pcihost_get_pci_hole_end, NULL, NULL, NULL, NULL); object_property_add(obj, PCI_HOST_PROP_PCI_HOLE64_START, "int", i440fx_pcihost_get_pci_hole64_start, NULL, NULL, NULL, NULL); object_property_add(obj, PCI_HOST_PROP_PCI_HOLE64_END, "int", i440fx_pcihost_get_pci_hole64_end, NULL, NULL, NULL, NULL); } static void i440fx_pcihost_realize(DeviceState *dev, Error **errp) { PCIHostState *s = PCI_HOST_BRIDGE(dev); SysBusDevice *sbd = SYS_BUS_DEVICE(dev); sysbus_add_io(sbd, 0xcf8, &s->conf_mem); sysbus_init_ioports(sbd, 0xcf8, 4); sysbus_add_io(sbd, 0xcfc, &s->data_mem); sysbus_init_ioports(sbd, 0xcfc, 4); } static void i440fx_realize(PCIDevice *dev, Error **errp) { dev->config[I440FX_SMRAM] = 0x02; if (object_property_get_bool(qdev_get_machine(), "iommu", NULL)) { error_report("warning: i440fx doesn't support emulated iommu"); } } PCIBus *i440fx_init(const char *host_type, const char *pci_type, PCII440FXState **pi440fx_state, int *piix3_devfn, ISABus **isa_bus, qemu_irq *pic, MemoryRegion *address_space_mem, MemoryRegion *address_space_io, ram_addr_t ram_size, ram_addr_t below_4g_mem_size, ram_addr_t above_4g_mem_size, MemoryRegion *pci_address_space, MemoryRegion *ram_memory) { DeviceState *dev; PCIBus *b; PCIDevice *d; PCIHostState *s; PIIX3State *piix3; PCII440FXState *f; unsigned i; I440FXState *i440fx; dev = qdev_create(NULL, host_type); s = PCI_HOST_BRIDGE(dev); b = pci_bus_new(dev, NULL, pci_address_space, address_space_io, 0, TYPE_PCI_BUS); s->bus = b; object_property_add_child(qdev_get_machine(), "i440fx", OBJECT(dev), NULL); qdev_init_nofail(dev); d = pci_create_simple(b, 0, pci_type); *pi440fx_state = I440FX_PCI_DEVICE(d); f = *pi440fx_state; f->system_memory = address_space_mem; f->pci_address_space = pci_address_space; f->ram_memory = ram_memory; i440fx = I440FX_PCI_HOST_BRIDGE(dev); range_set_bounds(&i440fx->pci_hole, below_4g_mem_size, IO_APIC_DEFAULT_ADDRESS - 1); /* setup pci memory mapping */ pc_pci_as_mapping_init(OBJECT(f), f->system_memory, f->pci_address_space); /* if *disabled* show SMRAM to all CPUs */ memory_region_init_alias(&f->smram_region, OBJECT(d), "smram-region", f->pci_address_space, 0xa0000, 0x20000); memory_region_add_subregion_overlap(f->system_memory, 0xa0000, &f->smram_region, 1); memory_region_set_enabled(&f->smram_region, true); /* smram, as seen by SMM CPUs */ memory_region_init(&f->smram, OBJECT(d), "smram", 1ull << 32); memory_region_set_enabled(&f->smram, true); memory_region_init_alias(&f->low_smram, OBJECT(d), "smram-low", f->ram_memory, 0xa0000, 0x20000); memory_region_set_enabled(&f->low_smram, true); memory_region_add_subregion(&f->smram, 0xa0000, &f->low_smram); object_property_add_const_link(qdev_get_machine(), "smram", OBJECT(&f->smram), &error_abort); init_pam(dev, f->ram_memory, f->system_memory, f->pci_address_space, &f->pam_regions[0], PAM_BIOS_BASE, PAM_BIOS_SIZE); for (i = 0; i < 12; ++i) { init_pam(dev, f->ram_memory, f->system_memory, f->pci_address_space, &f->pam_regions[i+1], PAM_EXPAN_BASE + i * PAM_EXPAN_SIZE, PAM_EXPAN_SIZE); } /* Xen supports additional interrupt routes from the PCI devices to * the IOAPIC: the four pins of each PCI device on the bus are also * connected to the IOAPIC directly. * These additional routes can be discovered through ACPI. */ if (xen_enabled()) { PCIDevice *pci_dev = pci_create_simple_multifunction(b, -1, true, "PIIX3-xen"); piix3 = PIIX3_PCI_DEVICE(pci_dev); pci_bus_irqs(b, xen_piix3_set_irq, xen_pci_slot_get_pirq, piix3, XEN_PIIX_NUM_PIRQS); } else { PCIDevice *pci_dev = pci_create_simple_multifunction(b, -1, true, "PIIX3"); piix3 = PIIX3_PCI_DEVICE(pci_dev); pci_bus_irqs(b, piix3_set_irq, pci_slot_get_pirq, piix3, PIIX_NUM_PIRQS); pci_bus_set_route_irq_fn(b, piix3_route_intx_pin_to_irq); } piix3->pic = pic; *isa_bus = ISA_BUS(qdev_get_child_bus(DEVICE(piix3), "isa.0")); *piix3_devfn = piix3->dev.devfn; ram_size = ram_size / 8 / 1024 / 1024; if (ram_size > 255) { ram_size = 255; } d->config[I440FX_COREBOOT_RAM_SIZE] = ram_size; i440fx_update_memory_mappings(f); return b; } PCIBus *find_i440fx(void) { PCIHostState *s = OBJECT_CHECK(PCIHostState, object_resolve_path("/machine/i440fx", NULL), TYPE_PCI_HOST_BRIDGE); return s ? s->bus : NULL; } /* PIIX3 PCI to ISA bridge */ static void piix3_set_irq_pic(PIIX3State *piix3, int pic_irq) { qemu_set_irq(piix3->pic[pic_irq], !!(piix3->pic_levels & (((1ULL << PIIX_NUM_PIRQS) - 1) << (pic_irq * PIIX_NUM_PIRQS)))); } static void piix3_set_irq_level_internal(PIIX3State *piix3, int pirq, int level) { int pic_irq; uint64_t mask; pic_irq = piix3->dev.config[PIIX_PIRQC + pirq]; if (pic_irq >= PIIX_NUM_PIC_IRQS) { return; } mask = 1ULL << ((pic_irq * PIIX_NUM_PIRQS) + pirq); piix3->pic_levels &= ~mask; piix3->pic_levels |= mask * !!level; } static void piix3_set_irq_level(PIIX3State *piix3, int pirq, int level) { int pic_irq; pic_irq = piix3->dev.config[PIIX_PIRQC + pirq]; if (pic_irq >= PIIX_NUM_PIC_IRQS) { return; } piix3_set_irq_level_internal(piix3, pirq, level); piix3_set_irq_pic(piix3, pic_irq); } static void piix3_set_irq(void *opaque, int pirq, int level) { PIIX3State *piix3 = opaque; piix3_set_irq_level(piix3, pirq, level); } static PCIINTxRoute piix3_route_intx_pin_to_irq(void *opaque, int pin) { PIIX3State *piix3 = opaque; int irq = piix3->dev.config[PIIX_PIRQC + pin]; PCIINTxRoute route; if (irq < PIIX_NUM_PIC_IRQS) { route.mode = PCI_INTX_ENABLED; route.irq = irq; } else { route.mode = PCI_INTX_DISABLED; route.irq = -1; } return route; } /* irq routing is changed. so rebuild bitmap */ static void piix3_update_irq_levels(PIIX3State *piix3) { int pirq; piix3->pic_levels = 0; for (pirq = 0; pirq < PIIX_NUM_PIRQS; pirq++) { piix3_set_irq_level(piix3, pirq, pci_bus_get_irq_level(piix3->dev.bus, pirq)); } } static void piix3_write_config(PCIDevice *dev, uint32_t address, uint32_t val, int len) { pci_default_write_config(dev, address, val, len); if (ranges_overlap(address, len, PIIX_PIRQC, 4)) { PIIX3State *piix3 = PIIX3_PCI_DEVICE(dev); int pic_irq; pci_bus_fire_intx_routing_notifier(piix3->dev.bus); piix3_update_irq_levels(piix3); for (pic_irq = 0; pic_irq < PIIX_NUM_PIC_IRQS; pic_irq++) { piix3_set_irq_pic(piix3, pic_irq); } } } static void piix3_write_config_xen(PCIDevice *dev, uint32_t address, uint32_t val, int len) { xen_piix_pci_write_config_client(address, val, len); piix3_write_config(dev, address, val, len); } static void piix3_reset(void *opaque) { PIIX3State *d = opaque; uint8_t *pci_conf = d->dev.config; pci_conf[0x04] = 0x07; /* master, memory and I/O */ pci_conf[0x05] = 0x00; pci_conf[0x06] = 0x00; pci_conf[0x07] = 0x02; /* PCI_status_devsel_medium */ pci_conf[0x4c] = 0x4d; pci_conf[0x4e] = 0x03; pci_conf[0x4f] = 0x00; pci_conf[0x60] = 0x80; pci_conf[0x61] = 0x80; pci_conf[0x62] = 0x80; pci_conf[0x63] = 0x80; pci_conf[0x69] = 0x02; pci_conf[0x70] = 0x80; pci_conf[0x76] = 0x0c; pci_conf[0x77] = 0x0c; pci_conf[0x78] = 0x02; pci_conf[0x79] = 0x00; pci_conf[0x80] = 0x00; pci_conf[0x82] = 0x00; pci_conf[0xa0] = 0x08; pci_conf[0xa2] = 0x00; pci_conf[0xa3] = 0x00; pci_conf[0xa4] = 0x00; pci_conf[0xa5] = 0x00; pci_conf[0xa6] = 0x00; pci_conf[0xa7] = 0x00; pci_conf[0xa8] = 0x0f; pci_conf[0xaa] = 0x00; pci_conf[0xab] = 0x00; pci_conf[0xac] = 0x00; pci_conf[0xae] = 0x00; d->pic_levels = 0; d->rcr = 0; } static int piix3_post_load(void *opaque, int version_id) { PIIX3State *piix3 = opaque; int pirq; /* Because the i8259 has not been deserialized yet, qemu_irq_raise * might bring the system to a different state than the saved one; * for example, the interrupt could be masked but the i8259 would * not know that yet and would trigger an interrupt in the CPU. * * Here, we update irq levels without raising the interrupt. * Interrupt state will be deserialized separately through the i8259. */ piix3->pic_levels = 0; for (pirq = 0; pirq < PIIX_NUM_PIRQS; pirq++) { piix3_set_irq_level_internal(piix3, pirq, pci_bus_get_irq_level(piix3->dev.bus, pirq)); } return 0; } static void piix3_pre_save(void *opaque) { int i; PIIX3State *piix3 = opaque; for (i = 0; i < ARRAY_SIZE(piix3->pci_irq_levels_vmstate); i++) { piix3->pci_irq_levels_vmstate[i] = pci_bus_get_irq_level(piix3->dev.bus, i); } } static bool piix3_rcr_needed(void *opaque) { PIIX3State *piix3 = opaque; return (piix3->rcr != 0); } static const VMStateDescription vmstate_piix3_rcr = { .name = "PIIX3/rcr", .version_id = 1, .minimum_version_id = 1, .needed = piix3_rcr_needed, .fields = (VMStateField[]) { VMSTATE_UINT8(rcr, PIIX3State), VMSTATE_END_OF_LIST() } }; static const VMStateDescription vmstate_piix3 = { .name = "PIIX3", .version_id = 3, .minimum_version_id = 2, .post_load = piix3_post_load, .pre_save = piix3_pre_save, .fields = (VMStateField[]) { VMSTATE_PCI_DEVICE(dev, PIIX3State), VMSTATE_INT32_ARRAY_V(pci_irq_levels_vmstate, PIIX3State, PIIX_NUM_PIRQS, 3), VMSTATE_END_OF_LIST() }, .subsections = (const VMStateDescription*[]) { &vmstate_piix3_rcr, NULL } }; static void rcr_write(void *opaque, hwaddr addr, uint64_t val, unsigned len) { PIIX3State *d = opaque; if (val & 4) { qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET); return; } d->rcr = val & 2; /* keep System Reset type only */ } static uint64_t rcr_read(void *opaque, hwaddr addr, unsigned len) { PIIX3State *d = opaque; return d->rcr; } static const MemoryRegionOps rcr_ops = { .read = rcr_read, .write = rcr_write, .endianness = DEVICE_LITTLE_ENDIAN }; static void piix3_realize(PCIDevice *dev, Error **errp) { PIIX3State *d = PIIX3_PCI_DEVICE(dev); if (!isa_bus_new(DEVICE(d), get_system_memory(), pci_address_space_io(dev), errp)) { return; } memory_region_init_io(&d->rcr_mem, OBJECT(dev), &rcr_ops, d, "piix3-reset-control", 1); memory_region_add_subregion_overlap(pci_address_space_io(dev), RCR_IOPORT, &d->rcr_mem, 1); qemu_register_reset(piix3_reset, d); } static void pci_piix3_class_init(ObjectClass *klass, void *data) { DeviceClass *dc = DEVICE_CLASS(klass); PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); dc->desc = "ISA bridge"; dc->vmsd = &vmstate_piix3; dc->hotpluggable = false; k->realize = piix3_realize; k->vendor_id = PCI_VENDOR_ID_INTEL; /* 82371SB PIIX3 PCI-to-ISA bridge (Step A1) */ k->device_id = PCI_DEVICE_ID_INTEL_82371SB_0; k->class_id = PCI_CLASS_BRIDGE_ISA; /* * Reason: part of PIIX3 southbridge, needs to be wired up by * pc_piix.c's pc_init1() */ dc->user_creatable = false; } static const TypeInfo piix3_pci_type_info = { .name = TYPE_PIIX3_PCI_DEVICE, .parent = TYPE_PCI_DEVICE, .instance_size = sizeof(PIIX3State), .abstract = true, .class_init = pci_piix3_class_init, }; static void piix3_class_init(ObjectClass *klass, void *data) { PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); k->config_write = piix3_write_config; } static const TypeInfo piix3_info = { .name = "PIIX3", .parent = TYPE_PIIX3_PCI_DEVICE, .class_init = piix3_class_init, }; static void piix3_xen_class_init(ObjectClass *klass, void *data) { PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); k->config_write = piix3_write_config_xen; }; static const TypeInfo piix3_xen_info = { .name = "PIIX3-xen", .parent = TYPE_PIIX3_PCI_DEVICE, .class_init = piix3_xen_class_init, }; static void i440fx_class_init(ObjectClass *klass, void *data) { DeviceClass *dc = DEVICE_CLASS(klass); PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); k->realize = i440fx_realize; k->config_write = i440fx_write_config; k->vendor_id = PCI_VENDOR_ID_INTEL; k->device_id = PCI_DEVICE_ID_INTEL_82441; k->revision = 0x02; k->class_id = PCI_CLASS_BRIDGE_HOST; dc->desc = "Host bridge"; dc->vmsd = &vmstate_i440fx; /* * PCI-facing part of the host bridge, not usable without the * host-facing part, which can't be device_add'ed, yet. */ dc->user_creatable = false; dc->hotpluggable = false; } static const TypeInfo i440fx_info = { .name = TYPE_I440FX_PCI_DEVICE, .parent = TYPE_PCI_DEVICE, .instance_size = sizeof(PCII440FXState), .class_init = i440fx_class_init, }; /* IGD Passthrough Host Bridge. */ typedef struct { uint8_t offset; uint8_t len; } IGDHostInfo; /* Here we just expose minimal host bridge offset subset. */ static const IGDHostInfo igd_host_bridge_infos[] = { {0x08, 2}, /* revision id */ {0x2c, 2}, /* sybsystem vendor id */ {0x2e, 2}, /* sybsystem id */ {0x50, 2}, /* SNB: processor graphics control register */ {0x52, 2}, /* processor graphics control register */ {0xa4, 4}, /* SNB: graphics base of stolen memory */ {0xa8, 4}, /* SNB: base of GTT stolen memory */ }; static int host_pci_config_read(int pos, int len, uint32_t *val) { char path[PATH_MAX]; int config_fd; ssize_t size = sizeof(path); /* Access real host bridge. */ int rc = snprintf(path, size, "/sys/bus/pci/devices/%04x:%02x:%02x.%d/%s", 0, 0, 0, 0, "config"); int ret = 0; if (rc >= size || rc < 0) { return -ENODEV; } config_fd = open(path, O_RDWR); if (config_fd < 0) { return -ENODEV; } if (lseek(config_fd, pos, SEEK_SET) != pos) { ret = -errno; goto out; } do { rc = read(config_fd, (uint8_t *)val, len); } while (rc < 0 && (errno == EINTR || errno == EAGAIN)); if (rc != len) { ret = -errno; } out: close(config_fd); return ret; } static int igd_pt_i440fx_initfn(struct PCIDevice *pci_dev) { uint32_t val = 0; int rc, i, num; int pos, len; num = ARRAY_SIZE(igd_host_bridge_infos); for (i = 0; i < num; i++) { pos = igd_host_bridge_infos[i].offset; len = igd_host_bridge_infos[i].len; rc = host_pci_config_read(pos, len, &val); if (rc) { return -ENODEV; } pci_default_write_config(pci_dev, pos, val, len); } return 0; } static void igd_passthrough_i440fx_class_init(ObjectClass *klass, void *data) { DeviceClass *dc = DEVICE_CLASS(klass); PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); k->init = igd_pt_i440fx_initfn; dc->desc = "IGD Passthrough Host bridge"; } static const TypeInfo igd_passthrough_i440fx_info = { .name = TYPE_IGD_PASSTHROUGH_I440FX_PCI_DEVICE, .parent = TYPE_I440FX_PCI_DEVICE, .instance_size = sizeof(PCII440FXState), .class_init = igd_passthrough_i440fx_class_init, }; static const char *i440fx_pcihost_root_bus_path(PCIHostState *host_bridge, PCIBus *rootbus) { I440FXState *s = I440FX_PCI_HOST_BRIDGE(host_bridge); /* For backwards compat with old device paths */ if (s->short_root_bus) { return "0000"; } return "0000:00"; } static Property i440fx_props[] = { DEFINE_PROP_SIZE(PCI_HOST_PROP_PCI_HOLE64_SIZE, I440FXState, pci_hole64_size, DEFAULT_PCI_HOLE64_SIZE), DEFINE_PROP_UINT32("short_root_bus", I440FXState, short_root_bus, 0), DEFINE_PROP_END_OF_LIST(), }; static void i440fx_pcihost_class_init(ObjectClass *klass, void *data) { DeviceClass *dc = DEVICE_CLASS(klass); PCIHostBridgeClass *hc = PCI_HOST_BRIDGE_CLASS(klass); hc->root_bus_path = i440fx_pcihost_root_bus_path; dc->realize = i440fx_pcihost_realize; dc->fw_name = "pci"; dc->props = i440fx_props; /* Reason: needs to be wired up by pc_init1 */ dc->user_creatable = false; } static const TypeInfo i440fx_pcihost_info = { .name = TYPE_I440FX_PCI_HOST_BRIDGE, .parent = TYPE_PCI_HOST_BRIDGE, .instance_size = sizeof(I440FXState), .instance_init = i440fx_pcihost_initfn, .class_init = i440fx_pcihost_class_init, }; static void i440fx_register_types(void) { type_register_static(&i440fx_info); type_register_static(&igd_passthrough_i440fx_info); type_register_static(&piix3_pci_type_info); type_register_static(&piix3_info); type_register_static(&piix3_xen_info); type_register_static(&i440fx_pcihost_info); } type_init(i440fx_register_types)