| /* |
| * QEMU MCH/ICH9 PCI Bridge Emulation |
| * |
| * Copyright (c) 2006 Fabrice Bellard |
| * Copyright (c) 2009, 2010, 2011 |
| * Isaku Yamahata <yamahata at valinux co jp> |
| * VA Linux Systems Japan K.K. |
| * Copyright (C) 2012 Jason Baron <jbaron@redhat.com> |
| * |
| * This is based on piix.c, but heavily modified. |
| * |
| * 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 "qemu/log.h" |
| #include "hw/i386/pc.h" |
| #include "hw/pci-host/q35.h" |
| #include "hw/qdev-properties.h" |
| #include "migration/vmstate.h" |
| #include "qapi/error.h" |
| #include "qapi/visitor.h" |
| #include "qemu/module.h" |
| |
| /**************************************************************************** |
| * Q35 host |
| */ |
| |
| #define Q35_PCI_HOST_HOLE64_SIZE_DEFAULT (1ULL << 35) |
| |
| static void q35_host_realize(DeviceState *dev, Error **errp) |
| { |
| PCIHostState *pci = PCI_HOST_BRIDGE(dev); |
| Q35PCIHost *s = Q35_HOST_DEVICE(dev); |
| SysBusDevice *sbd = SYS_BUS_DEVICE(dev); |
| |
| memory_region_add_subregion(s->mch.address_space_io, |
| MCH_HOST_BRIDGE_CONFIG_ADDR, &pci->conf_mem); |
| sysbus_init_ioports(sbd, MCH_HOST_BRIDGE_CONFIG_ADDR, 4); |
| |
| memory_region_add_subregion(s->mch.address_space_io, |
| MCH_HOST_BRIDGE_CONFIG_DATA, &pci->data_mem); |
| sysbus_init_ioports(sbd, MCH_HOST_BRIDGE_CONFIG_DATA, 4); |
| |
| /* register q35 0xcf8 port as coalesced pio */ |
| memory_region_set_flush_coalesced(&pci->data_mem); |
| memory_region_add_coalescing(&pci->conf_mem, 0, 4); |
| |
| pci->bus = pci_root_bus_new(DEVICE(s), "pcie.0", |
| s->mch.pci_address_space, |
| s->mch.address_space_io, |
| 0, TYPE_PCIE_BUS); |
| |
| qdev_realize(DEVICE(&s->mch), BUS(pci->bus), &error_fatal); |
| } |
| |
| static const char *q35_host_root_bus_path(PCIHostState *host_bridge, |
| PCIBus *rootbus) |
| { |
| Q35PCIHost *s = Q35_HOST_DEVICE(host_bridge); |
| |
| /* For backwards compat with old device paths */ |
| if (s->mch.short_root_bus) { |
| return "0000"; |
| } |
| return "0000:00"; |
| } |
| |
| static void q35_host_get_pci_hole_start(Object *obj, Visitor *v, |
| const char *name, void *opaque, |
| Error **errp) |
| { |
| Q35PCIHost *s = Q35_HOST_DEVICE(obj); |
| uint64_t val64; |
| uint32_t value; |
| |
| val64 = range_is_empty(&s->mch.pci_hole) |
| ? 0 : range_lob(&s->mch.pci_hole); |
| value = val64; |
| assert(value == val64); |
| visit_type_uint32(v, name, &value, errp); |
| } |
| |
| static void q35_host_get_pci_hole_end(Object *obj, Visitor *v, |
| const char *name, void *opaque, |
| Error **errp) |
| { |
| Q35PCIHost *s = Q35_HOST_DEVICE(obj); |
| uint64_t val64; |
| uint32_t value; |
| |
| val64 = range_is_empty(&s->mch.pci_hole) |
| ? 0 : range_upb(&s->mch.pci_hole) + 1; |
| value = val64; |
| assert(value == val64); |
| visit_type_uint32(v, name, &value, errp); |
| } |
| |
| /* |
| * The 64bit PCI hole start is set by the Guest firmware |
| * as the address of the first 64bit PCI MEM resource. |
| * If no PCI device has resources on the 64bit area, |
| * the 64bit PCI hole will start after "over 4G RAM" and the |
| * reserved space for memory hotplug if any. |
| */ |
| static uint64_t q35_host_get_pci_hole64_start_value(Object *obj) |
| { |
| PCIHostState *h = PCI_HOST_BRIDGE(obj); |
| Q35PCIHost *s = Q35_HOST_DEVICE(obj); |
| Range w64; |
| uint64_t value; |
| |
| pci_bus_get_w64_range(h->bus, &w64); |
| value = range_is_empty(&w64) ? 0 : range_lob(&w64); |
| if (!value && s->pci_hole64_fix) { |
| value = pc_pci_hole64_start(); |
| } |
| return value; |
| } |
| |
| static void q35_host_get_pci_hole64_start(Object *obj, Visitor *v, |
| const char *name, void *opaque, |
| Error **errp) |
| { |
| uint64_t hole64_start = q35_host_get_pci_hole64_start_value(obj); |
| |
| visit_type_uint64(v, name, &hole64_start, errp); |
| } |
| |
| /* |
| * The 64bit PCI hole end is set by the Guest firmware |
| * as the address of the last 64bit PCI MEM resource. |
| * Then it is expanded to the PCI_HOST_PROP_PCI_HOLE64_SIZE |
| * that can be configured by the user. |
| */ |
| static void q35_host_get_pci_hole64_end(Object *obj, Visitor *v, |
| const char *name, void *opaque, |
| Error **errp) |
| { |
| PCIHostState *h = PCI_HOST_BRIDGE(obj); |
| Q35PCIHost *s = Q35_HOST_DEVICE(obj); |
| uint64_t hole64_start = q35_host_get_pci_hole64_start_value(obj); |
| Range w64; |
| uint64_t value, hole64_end; |
| |
| pci_bus_get_w64_range(h->bus, &w64); |
| value = range_is_empty(&w64) ? 0 : range_upb(&w64) + 1; |
| hole64_end = ROUND_UP(hole64_start + s->mch.pci_hole64_size, 1ULL << 30); |
| if (s->pci_hole64_fix && value < hole64_end) { |
| value = hole64_end; |
| } |
| visit_type_uint64(v, name, &value, errp); |
| } |
| |
| /* |
| * NOTE: setting defaults for the mch.* fields in this table |
| * doesn't work, because mch is a separate QOM object that is |
| * zeroed by the object_initialize(&s->mch, ...) call inside |
| * q35_host_initfn(). The default values for those |
| * properties need to be initialized manually by |
| * q35_host_initfn() after the object_initialize() call. |
| */ |
| static Property q35_host_props[] = { |
| DEFINE_PROP_UINT64(PCIE_HOST_MCFG_BASE, Q35PCIHost, parent_obj.base_addr, |
| MCH_HOST_BRIDGE_PCIEXBAR_DEFAULT), |
| DEFINE_PROP_SIZE(PCI_HOST_PROP_PCI_HOLE64_SIZE, Q35PCIHost, |
| mch.pci_hole64_size, Q35_PCI_HOST_HOLE64_SIZE_DEFAULT), |
| DEFINE_PROP_UINT32("short_root_bus", Q35PCIHost, mch.short_root_bus, 0), |
| DEFINE_PROP_SIZE(PCI_HOST_BELOW_4G_MEM_SIZE, Q35PCIHost, |
| mch.below_4g_mem_size, 0), |
| DEFINE_PROP_SIZE(PCI_HOST_ABOVE_4G_MEM_SIZE, Q35PCIHost, |
| mch.above_4g_mem_size, 0), |
| DEFINE_PROP_BOOL("x-pci-hole64-fix", Q35PCIHost, pci_hole64_fix, true), |
| DEFINE_PROP_END_OF_LIST(), |
| }; |
| |
| static void q35_host_class_init(ObjectClass *klass, void *data) |
| { |
| DeviceClass *dc = DEVICE_CLASS(klass); |
| PCIHostBridgeClass *hc = PCI_HOST_BRIDGE_CLASS(klass); |
| |
| hc->root_bus_path = q35_host_root_bus_path; |
| dc->realize = q35_host_realize; |
| device_class_set_props(dc, q35_host_props); |
| /* Reason: needs to be wired up by pc_q35_init */ |
| dc->user_creatable = false; |
| set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories); |
| dc->fw_name = "pci"; |
| } |
| |
| static void q35_host_initfn(Object *obj) |
| { |
| Q35PCIHost *s = Q35_HOST_DEVICE(obj); |
| PCIHostState *phb = PCI_HOST_BRIDGE(obj); |
| PCIExpressHost *pehb = PCIE_HOST_BRIDGE(obj); |
| |
| memory_region_init_io(&phb->conf_mem, obj, &pci_host_conf_le_ops, phb, |
| "pci-conf-idx", 4); |
| memory_region_init_io(&phb->data_mem, obj, &pci_host_data_le_ops, phb, |
| "pci-conf-data", 4); |
| |
| object_initialize_child(OBJECT(s), "mch", &s->mch, TYPE_MCH_PCI_DEVICE); |
| qdev_prop_set_int32(DEVICE(&s->mch), "addr", PCI_DEVFN(0, 0)); |
| qdev_prop_set_bit(DEVICE(&s->mch), "multifunction", false); |
| /* mch's object_initialize resets the default value, set it again */ |
| qdev_prop_set_uint64(DEVICE(s), PCI_HOST_PROP_PCI_HOLE64_SIZE, |
| Q35_PCI_HOST_HOLE64_SIZE_DEFAULT); |
| object_property_add(obj, PCI_HOST_PROP_PCI_HOLE_START, "uint32", |
| q35_host_get_pci_hole_start, |
| NULL, NULL, NULL); |
| |
| object_property_add(obj, PCI_HOST_PROP_PCI_HOLE_END, "uint32", |
| q35_host_get_pci_hole_end, |
| NULL, NULL, NULL); |
| |
| object_property_add(obj, PCI_HOST_PROP_PCI_HOLE64_START, "uint64", |
| q35_host_get_pci_hole64_start, |
| NULL, NULL, NULL); |
| |
| object_property_add(obj, PCI_HOST_PROP_PCI_HOLE64_END, "uint64", |
| q35_host_get_pci_hole64_end, |
| NULL, NULL, NULL); |
| |
| object_property_add_uint64_ptr(obj, PCIE_HOST_MCFG_SIZE, |
| &pehb->size, OBJ_PROP_FLAG_READ); |
| |
| object_property_add_link(obj, PCI_HOST_PROP_RAM_MEM, TYPE_MEMORY_REGION, |
| (Object **) &s->mch.ram_memory, |
| qdev_prop_allow_set_link_before_realize, 0); |
| |
| object_property_add_link(obj, PCI_HOST_PROP_PCI_MEM, TYPE_MEMORY_REGION, |
| (Object **) &s->mch.pci_address_space, |
| qdev_prop_allow_set_link_before_realize, 0); |
| |
| object_property_add_link(obj, PCI_HOST_PROP_SYSTEM_MEM, TYPE_MEMORY_REGION, |
| (Object **) &s->mch.system_memory, |
| qdev_prop_allow_set_link_before_realize, 0); |
| |
| object_property_add_link(obj, PCI_HOST_PROP_IO_MEM, TYPE_MEMORY_REGION, |
| (Object **) &s->mch.address_space_io, |
| qdev_prop_allow_set_link_before_realize, 0); |
| } |
| |
| static const TypeInfo q35_host_info = { |
| .name = TYPE_Q35_HOST_DEVICE, |
| .parent = TYPE_PCIE_HOST_BRIDGE, |
| .instance_size = sizeof(Q35PCIHost), |
| .instance_init = q35_host_initfn, |
| .class_init = q35_host_class_init, |
| }; |
| |
| /**************************************************************************** |
| * MCH D0:F0 |
| */ |
| |
| static uint64_t blackhole_read(void *ptr, hwaddr reg, unsigned size) |
| { |
| return 0xffffffff; |
| } |
| |
| static void blackhole_write(void *opaque, hwaddr addr, uint64_t val, |
| unsigned width) |
| { |
| /* nothing */ |
| } |
| |
| static const MemoryRegionOps blackhole_ops = { |
| .read = blackhole_read, |
| .write = blackhole_write, |
| .valid.min_access_size = 1, |
| .valid.max_access_size = 4, |
| .impl.min_access_size = 4, |
| .impl.max_access_size = 4, |
| .endianness = DEVICE_LITTLE_ENDIAN, |
| }; |
| |
| /* PCIe MMCFG */ |
| static void mch_update_pciexbar(MCHPCIState *mch) |
| { |
| PCIDevice *pci_dev = PCI_DEVICE(mch); |
| BusState *bus = qdev_get_parent_bus(DEVICE(mch)); |
| PCIExpressHost *pehb = PCIE_HOST_BRIDGE(bus->parent); |
| |
| uint64_t pciexbar; |
| int enable; |
| uint64_t addr; |
| uint64_t addr_mask; |
| uint32_t length; |
| |
| pciexbar = pci_get_quad(pci_dev->config + MCH_HOST_BRIDGE_PCIEXBAR); |
| enable = pciexbar & MCH_HOST_BRIDGE_PCIEXBAREN; |
| addr_mask = MCH_HOST_BRIDGE_PCIEXBAR_ADMSK; |
| switch (pciexbar & MCH_HOST_BRIDGE_PCIEXBAR_LENGTH_MASK) { |
| case MCH_HOST_BRIDGE_PCIEXBAR_LENGTH_256M: |
| length = 256 * 1024 * 1024; |
| break; |
| case MCH_HOST_BRIDGE_PCIEXBAR_LENGTH_128M: |
| length = 128 * 1024 * 1024; |
| addr_mask |= MCH_HOST_BRIDGE_PCIEXBAR_128ADMSK | |
| MCH_HOST_BRIDGE_PCIEXBAR_64ADMSK; |
| break; |
| case MCH_HOST_BRIDGE_PCIEXBAR_LENGTH_64M: |
| length = 64 * 1024 * 1024; |
| addr_mask |= MCH_HOST_BRIDGE_PCIEXBAR_64ADMSK; |
| break; |
| case MCH_HOST_BRIDGE_PCIEXBAR_LENGTH_RVD: |
| qemu_log_mask(LOG_GUEST_ERROR, "Q35: Reserved PCIEXBAR LENGTH\n"); |
| return; |
| default: |
| abort(); |
| } |
| addr = pciexbar & addr_mask; |
| pcie_host_mmcfg_update(pehb, enable, addr, length); |
| } |
| |
| /* PAM */ |
| static void mch_update_pam(MCHPCIState *mch) |
| { |
| PCIDevice *pd = PCI_DEVICE(mch); |
| int i; |
| |
| memory_region_transaction_begin(); |
| for (i = 0; i < 13; i++) { |
| pam_update(&mch->pam_regions[i], i, |
| pd->config[MCH_HOST_BRIDGE_PAM0 + DIV_ROUND_UP(i, 2)]); |
| } |
| memory_region_transaction_commit(); |
| } |
| |
| /* SMRAM */ |
| static void mch_update_smram(MCHPCIState *mch) |
| { |
| PCIDevice *pd = PCI_DEVICE(mch); |
| bool h_smrame = (pd->config[MCH_HOST_BRIDGE_ESMRAMC] & MCH_HOST_BRIDGE_ESMRAMC_H_SMRAME); |
| uint32_t tseg_size; |
| |
| /* implement SMRAM.D_LCK */ |
| if (pd->config[MCH_HOST_BRIDGE_SMRAM] & MCH_HOST_BRIDGE_SMRAM_D_LCK) { |
| pd->config[MCH_HOST_BRIDGE_SMRAM] &= ~MCH_HOST_BRIDGE_SMRAM_D_OPEN; |
| pd->wmask[MCH_HOST_BRIDGE_SMRAM] = MCH_HOST_BRIDGE_SMRAM_WMASK_LCK; |
| pd->wmask[MCH_HOST_BRIDGE_ESMRAMC] = MCH_HOST_BRIDGE_ESMRAMC_WMASK_LCK; |
| } |
| |
| memory_region_transaction_begin(); |
| |
| if (pd->config[MCH_HOST_BRIDGE_SMRAM] & SMRAM_D_OPEN) { |
| /* Hide (!) low SMRAM if H_SMRAME = 1 */ |
| memory_region_set_enabled(&mch->smram_region, h_smrame); |
| /* Show high SMRAM if H_SMRAME = 1 */ |
| memory_region_set_enabled(&mch->open_high_smram, h_smrame); |
| } else { |
| /* Hide high SMRAM and low SMRAM */ |
| memory_region_set_enabled(&mch->smram_region, true); |
| memory_region_set_enabled(&mch->open_high_smram, false); |
| } |
| |
| if (pd->config[MCH_HOST_BRIDGE_SMRAM] & SMRAM_G_SMRAME) { |
| memory_region_set_enabled(&mch->low_smram, !h_smrame); |
| memory_region_set_enabled(&mch->high_smram, h_smrame); |
| } else { |
| memory_region_set_enabled(&mch->low_smram, false); |
| memory_region_set_enabled(&mch->high_smram, false); |
| } |
| |
| if ((pd->config[MCH_HOST_BRIDGE_ESMRAMC] & MCH_HOST_BRIDGE_ESMRAMC_T_EN) && |
| (pd->config[MCH_HOST_BRIDGE_SMRAM] & SMRAM_G_SMRAME)) { |
| switch (pd->config[MCH_HOST_BRIDGE_ESMRAMC] & |
| MCH_HOST_BRIDGE_ESMRAMC_TSEG_SZ_MASK) { |
| case MCH_HOST_BRIDGE_ESMRAMC_TSEG_SZ_1MB: |
| tseg_size = 1024 * 1024; |
| break; |
| case MCH_HOST_BRIDGE_ESMRAMC_TSEG_SZ_2MB: |
| tseg_size = 1024 * 1024 * 2; |
| break; |
| case MCH_HOST_BRIDGE_ESMRAMC_TSEG_SZ_8MB: |
| tseg_size = 1024 * 1024 * 8; |
| break; |
| default: |
| tseg_size = 1024 * 1024 * (uint32_t)mch->ext_tseg_mbytes; |
| break; |
| } |
| } else { |
| tseg_size = 0; |
| } |
| memory_region_del_subregion(mch->system_memory, &mch->tseg_blackhole); |
| memory_region_set_enabled(&mch->tseg_blackhole, tseg_size); |
| memory_region_set_size(&mch->tseg_blackhole, tseg_size); |
| memory_region_add_subregion_overlap(mch->system_memory, |
| mch->below_4g_mem_size - tseg_size, |
| &mch->tseg_blackhole, 1); |
| |
| memory_region_set_enabled(&mch->tseg_window, tseg_size); |
| memory_region_set_size(&mch->tseg_window, tseg_size); |
| memory_region_set_address(&mch->tseg_window, |
| mch->below_4g_mem_size - tseg_size); |
| memory_region_set_alias_offset(&mch->tseg_window, |
| mch->below_4g_mem_size - tseg_size); |
| |
| memory_region_transaction_commit(); |
| } |
| |
| static void mch_update_ext_tseg_mbytes(MCHPCIState *mch) |
| { |
| PCIDevice *pd = PCI_DEVICE(mch); |
| uint8_t *reg = pd->config + MCH_HOST_BRIDGE_EXT_TSEG_MBYTES; |
| |
| if (mch->ext_tseg_mbytes > 0 && |
| pci_get_word(reg) == MCH_HOST_BRIDGE_EXT_TSEG_MBYTES_QUERY) { |
| pci_set_word(reg, mch->ext_tseg_mbytes); |
| } |
| } |
| |
| static void mch_update_smbase_smram(MCHPCIState *mch) |
| { |
| PCIDevice *pd = PCI_DEVICE(mch); |
| uint8_t *reg = pd->config + MCH_HOST_BRIDGE_F_SMBASE; |
| bool lck; |
| |
| if (!mch->has_smram_at_smbase) { |
| return; |
| } |
| |
| if (*reg == MCH_HOST_BRIDGE_F_SMBASE_QUERY) { |
| pd->wmask[MCH_HOST_BRIDGE_F_SMBASE] = |
| MCH_HOST_BRIDGE_F_SMBASE_LCK; |
| *reg = MCH_HOST_BRIDGE_F_SMBASE_IN_RAM; |
| return; |
| } |
| |
| /* |
| * default/reset state, discard written value |
| * which will disable SMRAM balackhole at SMBASE |
| */ |
| if (pd->wmask[MCH_HOST_BRIDGE_F_SMBASE] == 0xff) { |
| *reg = 0x00; |
| } |
| |
| memory_region_transaction_begin(); |
| if (*reg & MCH_HOST_BRIDGE_F_SMBASE_LCK) { |
| /* disable all writes */ |
| pd->wmask[MCH_HOST_BRIDGE_F_SMBASE] &= |
| ~MCH_HOST_BRIDGE_F_SMBASE_LCK; |
| *reg = MCH_HOST_BRIDGE_F_SMBASE_LCK; |
| lck = true; |
| } else { |
| lck = false; |
| } |
| memory_region_set_enabled(&mch->smbase_blackhole, lck); |
| memory_region_set_enabled(&mch->smbase_window, lck); |
| memory_region_transaction_commit(); |
| } |
| |
| static void mch_write_config(PCIDevice *d, |
| uint32_t address, uint32_t val, int len) |
| { |
| MCHPCIState *mch = MCH_PCI_DEVICE(d); |
| |
| pci_default_write_config(d, address, val, len); |
| |
| if (ranges_overlap(address, len, MCH_HOST_BRIDGE_PAM0, |
| MCH_HOST_BRIDGE_PAM_SIZE)) { |
| mch_update_pam(mch); |
| } |
| |
| if (ranges_overlap(address, len, MCH_HOST_BRIDGE_PCIEXBAR, |
| MCH_HOST_BRIDGE_PCIEXBAR_SIZE)) { |
| mch_update_pciexbar(mch); |
| } |
| |
| if (ranges_overlap(address, len, MCH_HOST_BRIDGE_SMRAM, |
| MCH_HOST_BRIDGE_SMRAM_SIZE)) { |
| mch_update_smram(mch); |
| } |
| |
| if (ranges_overlap(address, len, MCH_HOST_BRIDGE_EXT_TSEG_MBYTES, |
| MCH_HOST_BRIDGE_EXT_TSEG_MBYTES_SIZE)) { |
| mch_update_ext_tseg_mbytes(mch); |
| } |
| |
| if (ranges_overlap(address, len, MCH_HOST_BRIDGE_F_SMBASE, 1)) { |
| mch_update_smbase_smram(mch); |
| } |
| } |
| |
| static void mch_update(MCHPCIState *mch) |
| { |
| mch_update_pciexbar(mch); |
| mch_update_pam(mch); |
| mch_update_smram(mch); |
| mch_update_ext_tseg_mbytes(mch); |
| mch_update_smbase_smram(mch); |
| |
| /* |
| * pci hole goes from end-of-low-ram to io-apic. |
| * mmconfig will be excluded by the dsdt builder. |
| */ |
| range_set_bounds(&mch->pci_hole, |
| mch->below_4g_mem_size, |
| IO_APIC_DEFAULT_ADDRESS - 1); |
| } |
| |
| static int mch_post_load(void *opaque, int version_id) |
| { |
| MCHPCIState *mch = opaque; |
| mch_update(mch); |
| return 0; |
| } |
| |
| static const VMStateDescription vmstate_mch = { |
| .name = "mch", |
| .version_id = 1, |
| .minimum_version_id = 1, |
| .post_load = mch_post_load, |
| .fields = (VMStateField[]) { |
| VMSTATE_PCI_DEVICE(parent_obj, MCHPCIState), |
| /* 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 mch_reset(DeviceState *qdev) |
| { |
| PCIDevice *d = PCI_DEVICE(qdev); |
| MCHPCIState *mch = MCH_PCI_DEVICE(d); |
| |
| pci_set_quad(d->config + MCH_HOST_BRIDGE_PCIEXBAR, |
| MCH_HOST_BRIDGE_PCIEXBAR_DEFAULT); |
| |
| d->config[MCH_HOST_BRIDGE_SMRAM] = MCH_HOST_BRIDGE_SMRAM_DEFAULT; |
| d->config[MCH_HOST_BRIDGE_ESMRAMC] = MCH_HOST_BRIDGE_ESMRAMC_DEFAULT; |
| d->wmask[MCH_HOST_BRIDGE_SMRAM] = MCH_HOST_BRIDGE_SMRAM_WMASK; |
| d->wmask[MCH_HOST_BRIDGE_ESMRAMC] = MCH_HOST_BRIDGE_ESMRAMC_WMASK; |
| |
| if (mch->ext_tseg_mbytes > 0) { |
| pci_set_word(d->config + MCH_HOST_BRIDGE_EXT_TSEG_MBYTES, |
| MCH_HOST_BRIDGE_EXT_TSEG_MBYTES_QUERY); |
| } |
| |
| d->config[MCH_HOST_BRIDGE_F_SMBASE] = 0; |
| d->wmask[MCH_HOST_BRIDGE_F_SMBASE] = 0xff; |
| |
| mch_update(mch); |
| } |
| |
| static void mch_realize(PCIDevice *d, Error **errp) |
| { |
| int i; |
| MCHPCIState *mch = MCH_PCI_DEVICE(d); |
| |
| if (mch->ext_tseg_mbytes > MCH_HOST_BRIDGE_EXT_TSEG_MBYTES_MAX) { |
| error_setg(errp, "invalid extended-tseg-mbytes value: %" PRIu16, |
| mch->ext_tseg_mbytes); |
| return; |
| } |
| |
| /* setup pci memory mapping */ |
| pc_pci_as_mapping_init(mch->system_memory, mch->pci_address_space); |
| |
| /* if *disabled* show SMRAM to all CPUs */ |
| memory_region_init_alias(&mch->smram_region, OBJECT(mch), "smram-region", |
| mch->pci_address_space, MCH_HOST_BRIDGE_SMRAM_C_BASE, |
| MCH_HOST_BRIDGE_SMRAM_C_SIZE); |
| memory_region_add_subregion_overlap(mch->system_memory, MCH_HOST_BRIDGE_SMRAM_C_BASE, |
| &mch->smram_region, 1); |
| memory_region_set_enabled(&mch->smram_region, true); |
| |
| memory_region_init_alias(&mch->open_high_smram, OBJECT(mch), "smram-open-high", |
| mch->ram_memory, MCH_HOST_BRIDGE_SMRAM_C_BASE, |
| MCH_HOST_BRIDGE_SMRAM_C_SIZE); |
| memory_region_add_subregion_overlap(mch->system_memory, 0xfeda0000, |
| &mch->open_high_smram, 1); |
| memory_region_set_enabled(&mch->open_high_smram, false); |
| |
| /* smram, as seen by SMM CPUs */ |
| memory_region_init(&mch->smram, OBJECT(mch), "smram", 4 * GiB); |
| memory_region_set_enabled(&mch->smram, true); |
| memory_region_init_alias(&mch->low_smram, OBJECT(mch), "smram-low", |
| mch->ram_memory, MCH_HOST_BRIDGE_SMRAM_C_BASE, |
| MCH_HOST_BRIDGE_SMRAM_C_SIZE); |
| memory_region_set_enabled(&mch->low_smram, true); |
| memory_region_add_subregion(&mch->smram, MCH_HOST_BRIDGE_SMRAM_C_BASE, |
| &mch->low_smram); |
| memory_region_init_alias(&mch->high_smram, OBJECT(mch), "smram-high", |
| mch->ram_memory, MCH_HOST_BRIDGE_SMRAM_C_BASE, |
| MCH_HOST_BRIDGE_SMRAM_C_SIZE); |
| memory_region_set_enabled(&mch->high_smram, true); |
| memory_region_add_subregion(&mch->smram, 0xfeda0000, &mch->high_smram); |
| |
| memory_region_init_io(&mch->tseg_blackhole, OBJECT(mch), |
| &blackhole_ops, NULL, |
| "tseg-blackhole", 0); |
| memory_region_set_enabled(&mch->tseg_blackhole, false); |
| memory_region_add_subregion_overlap(mch->system_memory, |
| mch->below_4g_mem_size, |
| &mch->tseg_blackhole, 1); |
| |
| memory_region_init_alias(&mch->tseg_window, OBJECT(mch), "tseg-window", |
| mch->ram_memory, mch->below_4g_mem_size, 0); |
| memory_region_set_enabled(&mch->tseg_window, false); |
| memory_region_add_subregion(&mch->smram, mch->below_4g_mem_size, |
| &mch->tseg_window); |
| |
| /* |
| * This is not what hardware does, so it's QEMU specific hack. |
| * See commit message for details. |
| */ |
| memory_region_init_io(&mch->smbase_blackhole, OBJECT(mch), &blackhole_ops, |
| NULL, "smbase-blackhole", |
| MCH_HOST_BRIDGE_SMBASE_SIZE); |
| memory_region_set_enabled(&mch->smbase_blackhole, false); |
| memory_region_add_subregion_overlap(mch->system_memory, |
| MCH_HOST_BRIDGE_SMBASE_ADDR, |
| &mch->smbase_blackhole, 1); |
| |
| memory_region_init_alias(&mch->smbase_window, OBJECT(mch), |
| "smbase-window", mch->ram_memory, |
| MCH_HOST_BRIDGE_SMBASE_ADDR, |
| MCH_HOST_BRIDGE_SMBASE_SIZE); |
| memory_region_set_enabled(&mch->smbase_window, false); |
| memory_region_add_subregion(&mch->smram, MCH_HOST_BRIDGE_SMBASE_ADDR, |
| &mch->smbase_window); |
| |
| object_property_add_const_link(qdev_get_machine(), "smram", |
| OBJECT(&mch->smram)); |
| |
| init_pam(&mch->pam_regions[0], OBJECT(mch), mch->ram_memory, |
| mch->system_memory, mch->pci_address_space, |
| PAM_BIOS_BASE, PAM_BIOS_SIZE); |
| for (i = 0; i < ARRAY_SIZE(mch->pam_regions) - 1; ++i) { |
| init_pam(&mch->pam_regions[i + 1], OBJECT(mch), mch->ram_memory, |
| mch->system_memory, mch->pci_address_space, |
| PAM_EXPAN_BASE + i * PAM_EXPAN_SIZE, PAM_EXPAN_SIZE); |
| } |
| } |
| |
| uint64_t mch_mcfg_base(void) |
| { |
| bool ambiguous; |
| Object *o = object_resolve_path_type("", TYPE_MCH_PCI_DEVICE, &ambiguous); |
| if (!o) { |
| return 0; |
| } |
| return MCH_HOST_BRIDGE_PCIEXBAR_DEFAULT; |
| } |
| |
| static Property mch_props[] = { |
| DEFINE_PROP_UINT16("extended-tseg-mbytes", MCHPCIState, ext_tseg_mbytes, |
| 16), |
| DEFINE_PROP_BOOL("smbase-smram", MCHPCIState, has_smram_at_smbase, true), |
| DEFINE_PROP_END_OF_LIST(), |
| }; |
| |
| static void mch_class_init(ObjectClass *klass, void *data) |
| { |
| PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); |
| DeviceClass *dc = DEVICE_CLASS(klass); |
| |
| k->realize = mch_realize; |
| k->config_write = mch_write_config; |
| dc->reset = mch_reset; |
| device_class_set_props(dc, mch_props); |
| set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories); |
| dc->desc = "Host bridge"; |
| dc->vmsd = &vmstate_mch; |
| k->vendor_id = PCI_VENDOR_ID_INTEL; |
| /* |
| * The 'q35' machine type implements an Intel Series 3 chipset, |
| * of which there are several variants. The key difference between |
| * the 82P35 MCH ('p35') and 82Q35 GMCH ('q35') variants is that |
| * the latter has an integrated graphics adapter. QEMU does not |
| * implement integrated graphics, so uses the PCI ID for the 82P35 |
| * chipset. |
| */ |
| k->device_id = PCI_DEVICE_ID_INTEL_P35_MCH; |
| k->revision = MCH_HOST_BRIDGE_REVISION_DEFAULT; |
| k->class_id = PCI_CLASS_BRIDGE_HOST; |
| /* |
| * 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; |
| } |
| |
| static const TypeInfo mch_info = { |
| .name = TYPE_MCH_PCI_DEVICE, |
| .parent = TYPE_PCI_DEVICE, |
| .instance_size = sizeof(MCHPCIState), |
| .class_init = mch_class_init, |
| .interfaces = (InterfaceInfo[]) { |
| { INTERFACE_CONVENTIONAL_PCI_DEVICE }, |
| { }, |
| }, |
| }; |
| |
| static void q35_register(void) |
| { |
| type_register_static(&mch_info); |
| type_register_static(&q35_host_info); |
| } |
| |
| type_init(q35_register); |
