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qemu/hw/pci-host/q35.c
Marcel Apfelbaum 9fa99d2519 hw/pci-host: Fix x86 Host Bridges 64bit PCI hole 
Currently there is no MMIO range over 4G
reserved for PCI hotplug. Since the 32bit PCI hole
depends on the number of cold-plugged PCI devices
and other factors, it is very possible is too small
to hotplug PCI devices with large BARs.

Fix it by reserving 2G for I4400FX chipset
in order to comply with older Win32 Guest OSes
and 32G for Q35 chipset.

Even if the new defaults of pci-hole64-size will appear in
"info qtree" also for older machines, the property was
not implemented so no changes will be visible to guests.

Note this is a regression since prev QEMU versions had
some range reserved for 64bit PCI hotplug.

Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Marcel Apfelbaum <marcel@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2017-11-16 17:46:53 +02:00

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/*
* 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 "hw/hw.h"
#include "hw/pci-host/q35.h"
#include "qapi/error.h"
#include "qapi/visitor.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);
sysbus_add_io(sbd, MCH_HOST_BRIDGE_CONFIG_ADDR, &pci->conf_mem);
sysbus_init_ioports(sbd, MCH_HOST_BRIDGE_CONFIG_ADDR, 4);
sysbus_add_io(sbd, MCH_HOST_BRIDGE_CONFIG_DATA, &pci->data_mem);
sysbus_init_ioports(sbd, MCH_HOST_BRIDGE_CONFIG_DATA, 4);
pci->bus = pci_bus_new(DEVICE(s), "pcie.0",
s->mch.pci_address_space, s->mch.address_space_io,
0, TYPE_PCIE_BUS);
PC_MACHINE(qdev_get_machine())->bus = pci->bus;
qdev_set_parent_bus(DEVICE(&s->mch), BUS(pci->bus));
qdev_init_nofail(DEVICE(&s->mch));
}
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 void q35_host_get_pci_hole64_start(Object *obj, Visitor *v,
const char *name, void *opaque,
Error **errp)
{
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();
}
visit_type_uint64(v, name, &value, 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 = pc_pci_hole64_start();
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);
}
static void q35_host_get_mmcfg_size(Object *obj, Visitor *v, const char *name,
void *opaque, Error **errp)
{
PCIExpressHost *e = PCIE_HOST_BRIDGE(obj);
visit_type_uint64(v, name, &e->size, 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;
dc->props = 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);
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(&s->mch, sizeof(s->mch), TYPE_MCH_PCI_DEVICE);
object_property_add_child(OBJECT(s), "mch", OBJECT(&s->mch), NULL);
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, NULL);
object_property_add(obj, PCI_HOST_PROP_PCI_HOLE_END, "uint32",
q35_host_get_pci_hole_end,
NULL, NULL, NULL, NULL);
object_property_add(obj, PCI_HOST_PROP_PCI_HOLE64_START, "uint64",
q35_host_get_pci_hole64_start,
NULL, NULL, NULL, NULL);
object_property_add(obj, PCI_HOST_PROP_PCI_HOLE64_END, "uint64",
q35_host_get_pci_hole64_end,
NULL, NULL, NULL, NULL);
object_property_add(obj, PCIE_HOST_MCFG_SIZE, "uint64",
q35_host_get_mmcfg_size,
NULL, NULL, NULL, NULL);
object_property_add_link(obj, MCH_HOST_PROP_RAM_MEM, TYPE_MEMORY_REGION,
(Object **) &s->mch.ram_memory,
qdev_prop_allow_set_link_before_realize, 0, NULL);
object_property_add_link(obj, MCH_HOST_PROP_PCI_MEM, TYPE_MEMORY_REGION,
(Object **) &s->mch.pci_address_space,
qdev_prop_allow_set_link_before_realize, 0, NULL);
object_property_add_link(obj, MCH_HOST_PROP_SYSTEM_MEM, TYPE_MEMORY_REGION,
(Object **) &s->mch.system_memory,
qdev_prop_allow_set_link_before_realize, 0, NULL);
object_property_add_link(obj, MCH_HOST_PROP_IO_MEM, TYPE_MEMORY_REGION,
(Object **) &s->mch.address_space_io,
qdev_prop_allow_set_link_before_realize, 0, NULL);
/* Leave enough space for the biggest MCFG BAR */
/* TODO: this matches current bios behaviour, but
* it's not a power of two, which means an MTRR
* can't cover it exactly.
*/
range_set_bounds(&s->mch.pci_hole,
MCH_HOST_BRIDGE_PCIEXBAR_DEFAULT + MCH_HOST_BRIDGE_PCIEXBAR_MAX,
IO_APIC_DEFAULT_ADDRESS - 1);
}
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 tseg_blackhole_read(void *ptr, hwaddr reg, unsigned size)
{
return 0xffffffff;
}
static void tseg_blackhole_write(void *opaque, hwaddr addr, uint64_t val,
unsigned width)
{
/* nothing */
}
static const MemoryRegionOps tseg_blackhole_ops = {
.read = tseg_blackhole_read,
.write = tseg_blackhole_write,
.endianness = DEVICE_NATIVE_ENDIAN,
.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:
default:
abort();
}
addr = pciexbar & addr_mask;
pcie_host_mmcfg_update(pehb, enable, addr, length);
/* Leave enough space for the MCFG BAR */
/*
* TODO: this matches current bios behaviour, but it's not a power of two,
* which means an MTRR can't cover it exactly.
*/
if (enable) {
range_set_bounds(&mch->pci_hole,
addr + length,
IO_APIC_DEFAULT_ADDRESS - 1);
} else {
range_set_bounds(&mch->pci_hole,
MCH_HOST_BRIDGE_PCIEXBAR_DEFAULT,
IO_APIC_DEFAULT_ADDRESS - 1);
}
}
/* 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) {
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_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);
}
}
static void mch_update(MCHPCIState *mch)
{
mch_update_pciexbar(mch);
mch_update_pam(mch);
mch_update_smram(mch);
mch_update_ext_tseg_mbytes(mch);
}
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);
}
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(OBJECT(mch), 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, 0xa0000, 0x20000);
memory_region_add_subregion_overlap(mch->system_memory, 0xa0000,
&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, 0xa0000, 0x20000);
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", 1ull << 32);
memory_region_set_enabled(&mch->smram, true);
memory_region_init_alias(&mch->low_smram, OBJECT(mch), "smram-low",
mch->ram_memory, 0xa0000, 0x20000);
memory_region_set_enabled(&mch->low_smram, true);
memory_region_add_subregion(&mch->smram, 0xa0000, &mch->low_smram);
memory_region_init_alias(&mch->high_smram, OBJECT(mch), "smram-high",
mch->ram_memory, 0xa0000, 0x20000);
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),
&tseg_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);
object_property_add_const_link(qdev_get_machine(), "smram",
OBJECT(&mch->smram), &error_abort);
init_pam(DEVICE(mch), mch->ram_memory, mch->system_memory,
mch->pci_address_space, &mch->pam_regions[0],
PAM_BIOS_BASE, PAM_BIOS_SIZE);
for (i = 0; i < 12; ++i) {
init_pam(DEVICE(mch), mch->ram_memory, mch->system_memory,
mch->pci_address_space, &mch->pam_regions[i+1],
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_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;
dc->props = mch_props;
set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
dc->desc = "Host bridge";
dc->vmsd = &vmstate_mch;
k->vendor_id = PCI_VENDOR_ID_INTEL;
k->device_id = PCI_DEVICE_ID_INTEL_Q35_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);
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