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qemu-patch-raspberry4/hw/i386/acpi-microvm.c
Marian Postevca 602b458201 acpi: Permit OEM ID and OEM table ID fields to be changed 
Qemu's ACPI table generation sets the fields OEM ID and OEM table ID
to "BOCHS " and "BXPCxxxx" where "xxxx" is replaced by the ACPI
table name.

Some games like Red Dead Redemption 2 seem to check the ACPI OEM ID
and OEM table ID for the strings "BOCHS" and "BXPC" and if they are
found, the game crashes(this may be an intentional detection
mechanism to prevent playing the game in a virtualized environment).

This patch allows you to override these default values.

The feature can be used in this manner:
qemu -machine oem-id=ABCDEF,oem-table-id=GHIJKLMN

The oem-id string can be up to 6 bytes in size, and the
oem-table-id string can be up to 8 bytes in size. If the string are
smaller than their respective sizes they will be padded with space.
If either of these parameters is not set, the current default values
will be used for the one missing.

Note that the the OEM Table ID field will not be extended with the
name of the table, but will use either the default name or the user
provided one.

This does not affect the -acpitable option (for user-defined ACPI
tables), which has precedence over -machine option.

Signed-off-by: Marian Postevca <posteuca@mutex.one>
Message-Id: <20210119003216.17637-3-posteuca@mutex.one>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2021-02-05 08:52:59 -05:00

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/* Support for generating ACPI tables and passing them to Guests
*
* Copyright (C) 2008-2010 Kevin O'Connor <kevin@koconnor.net>
* Copyright (C) 2006 Fabrice Bellard
* Copyright (C) 2013 Red Hat Inc
*
* Author: Michael S. Tsirkin <mst@redhat.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License along
* with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "qemu/cutils.h"
#include "qapi/error.h"
#include "exec/memory.h"
#include "hw/acpi/acpi.h"
#include "hw/acpi/aml-build.h"
#include "hw/acpi/bios-linker-loader.h"
#include "hw/acpi/generic_event_device.h"
#include "hw/acpi/utils.h"
#include "hw/boards.h"
#include "hw/i386/fw_cfg.h"
#include "hw/i386/microvm.h"
#include "hw/pci/pci.h"
#include "hw/pci/pcie_host.h"
#include "hw/usb/xhci.h"
#include "hw/virtio/virtio-mmio.h"
#include "acpi-common.h"
#include "acpi-microvm.h"
static void acpi_dsdt_add_virtio(Aml *scope,
MicrovmMachineState *mms)
{
gchar *separator;
long int index;
BusState *bus;
BusChild *kid;
bus = sysbus_get_default();
QTAILQ_FOREACH(kid, &bus->children, sibling) {
DeviceState *dev = kid->child;
Object *obj = object_dynamic_cast(OBJECT(dev), TYPE_VIRTIO_MMIO);
if (obj) {
VirtIOMMIOProxy *mmio = VIRTIO_MMIO(obj);
VirtioBusState *mmio_virtio_bus = &mmio->bus;
BusState *mmio_bus = &mmio_virtio_bus->parent_obj;
if (QTAILQ_EMPTY(&mmio_bus->children)) {
continue;
}
separator = g_strrstr(mmio_bus->name, ".");
if (!separator) {
continue;
}
if (qemu_strtol(separator + 1, NULL, 10, &index) != 0) {
continue;
}
uint32_t irq = mms->virtio_irq_base + index;
hwaddr base = VIRTIO_MMIO_BASE + index * 512;
hwaddr size = 512;
Aml *dev = aml_device("VR%02u", (unsigned)index);
aml_append(dev, aml_name_decl("_HID", aml_string("LNRO0005")));
aml_append(dev, aml_name_decl("_UID", aml_int(index)));
aml_append(dev, aml_name_decl("_CCA", aml_int(1)));
Aml *crs = aml_resource_template();
aml_append(crs, aml_memory32_fixed(base, size, AML_READ_WRITE));
aml_append(crs,
aml_interrupt(AML_CONSUMER, AML_LEVEL, AML_ACTIVE_HIGH,
AML_EXCLUSIVE, &irq, 1));
aml_append(dev, aml_name_decl("_CRS", crs));
aml_append(scope, dev);
}
}
}
static void acpi_dsdt_add_xhci(Aml *scope, MicrovmMachineState *mms)
{
if (machine_usb(MACHINE(mms))) {
xhci_sysbus_build_aml(scope, MICROVM_XHCI_BASE, MICROVM_XHCI_IRQ);
}
}
static void acpi_dsdt_add_pci(Aml *scope, MicrovmMachineState *mms)
{
if (mms->pcie != ON_OFF_AUTO_ON) {
return;
}
acpi_dsdt_add_gpex(scope, &mms->gpex);
}
static void
build_dsdt_microvm(GArray *table_data, BIOSLinker *linker,
MicrovmMachineState *mms)
{
X86MachineState *x86ms = X86_MACHINE(mms);
Aml *dsdt, *sb_scope, *scope, *pkg;
bool ambiguous;
Object *isabus;
isabus = object_resolve_path_type("", TYPE_ISA_BUS, &ambiguous);
assert(isabus);
assert(!ambiguous);
dsdt = init_aml_allocator();
/* Reserve space for header */
acpi_data_push(dsdt->buf, sizeof(AcpiTableHeader));
sb_scope = aml_scope("_SB");
fw_cfg_add_acpi_dsdt(sb_scope, x86ms->fw_cfg);
isa_build_aml(ISA_BUS(isabus), sb_scope);
build_ged_aml(sb_scope, GED_DEVICE, x86ms->acpi_dev,
GED_MMIO_IRQ, AML_SYSTEM_MEMORY, GED_MMIO_BASE);
acpi_dsdt_add_power_button(sb_scope);
acpi_dsdt_add_virtio(sb_scope, mms);
acpi_dsdt_add_xhci(sb_scope, mms);
acpi_dsdt_add_pci(sb_scope, mms);
aml_append(dsdt, sb_scope);
/* ACPI 5.0: Table 7-209 System State Package */
scope = aml_scope("\\");
pkg = aml_package(4);
aml_append(pkg, aml_int(ACPI_GED_SLP_TYP_S5));
aml_append(pkg, aml_int(0)); /* ignored */
aml_append(pkg, aml_int(0)); /* reserved */
aml_append(pkg, aml_int(0)); /* reserved */
aml_append(scope, aml_name_decl("_S5", pkg));
aml_append(dsdt, scope);
/* copy AML table into ACPI tables blob and patch header there */
g_array_append_vals(table_data, dsdt->buf->data, dsdt->buf->len);
build_header(linker, table_data,
(void *)(table_data->data + table_data->len - dsdt->buf->len),
"DSDT", dsdt->buf->len, 2, mms->oem_id, mms->oem_table_id);
free_aml_allocator();
}
static void acpi_build_microvm(AcpiBuildTables *tables,
MicrovmMachineState *mms)
{
MachineState *machine = MACHINE(mms);
X86MachineState *x86ms = X86_MACHINE(mms);
GArray *table_offsets;
GArray *tables_blob = tables->table_data;
unsigned dsdt, xsdt;
AcpiFadtData pmfadt = {
/* ACPI 5.0: 4.1 Hardware-Reduced ACPI */
.rev = 5,
.flags = ((1 << ACPI_FADT_F_HW_REDUCED_ACPI) |
(1 << ACPI_FADT_F_RESET_REG_SUP)),
/* ACPI 5.0: 4.8.3.7 Sleep Control and Status Registers */
.sleep_ctl = {
.space_id = AML_AS_SYSTEM_MEMORY,
.bit_width = 8,
.address = GED_MMIO_BASE_REGS + ACPI_GED_REG_SLEEP_CTL,
},
.sleep_sts = {
.space_id = AML_AS_SYSTEM_MEMORY,
.bit_width = 8,
.address = GED_MMIO_BASE_REGS + ACPI_GED_REG_SLEEP_STS,
},
/* ACPI 5.0: 4.8.3.6 Reset Register */
.reset_reg = {
.space_id = AML_AS_SYSTEM_MEMORY,
.bit_width = 8,
.address = GED_MMIO_BASE_REGS + ACPI_GED_REG_RESET,
},
.reset_val = ACPI_GED_RESET_VALUE,
};
table_offsets = g_array_new(false, true /* clear */,
sizeof(uint32_t));
bios_linker_loader_alloc(tables->linker,
ACPI_BUILD_TABLE_FILE, tables_blob,
64 /* Ensure FACS is aligned */,
false /* high memory */);
dsdt = tables_blob->len;
build_dsdt_microvm(tables_blob, tables->linker, mms);
pmfadt.dsdt_tbl_offset = &dsdt;
pmfadt.xdsdt_tbl_offset = &dsdt;
acpi_add_table(table_offsets, tables_blob);
build_fadt(tables_blob, tables->linker, &pmfadt, mms->oem_id,
mms->oem_table_id);
acpi_add_table(table_offsets, tables_blob);
acpi_build_madt(tables_blob, tables->linker, X86_MACHINE(machine),
ACPI_DEVICE_IF(x86ms->acpi_dev), mms->oem_id,
mms->oem_table_id);
xsdt = tables_blob->len;
build_xsdt(tables_blob, tables->linker, table_offsets, mms->oem_id,
mms->oem_table_id);
/* RSDP is in FSEG memory, so allocate it separately */
{
AcpiRsdpData rsdp_data = {
/* ACPI 2.0: 5.2.4.3 RSDP Structure */
.revision = 2, /* xsdt needs v2 */
.oem_id = mms->oem_id,
.xsdt_tbl_offset = &xsdt,
.rsdt_tbl_offset = NULL,
};
build_rsdp(tables->rsdp, tables->linker, &rsdp_data);
}
/* Cleanup memory that's no longer used. */
g_array_free(table_offsets, true);
}
static void acpi_build_no_update(void *build_opaque)
{
/* nothing, microvm tables don't change at runtime */
}
void acpi_setup_microvm(MicrovmMachineState *mms)
{
X86MachineState *x86ms = X86_MACHINE(mms);
AcpiBuildTables tables;
assert(x86ms->fw_cfg);
if (!x86_machine_is_acpi_enabled(x86ms)) {
return;
}
acpi_build_tables_init(&tables);
acpi_build_microvm(&tables, mms);
/* Now expose it all to Guest */
acpi_add_rom_blob(acpi_build_no_update, NULL,
tables.table_data,
ACPI_BUILD_TABLE_FILE,
ACPI_BUILD_TABLE_MAX_SIZE);
acpi_add_rom_blob(acpi_build_no_update, NULL,
tables.linker->cmd_blob,
"etc/table-loader", 0);
acpi_add_rom_blob(acpi_build_no_update, NULL,
tables.rsdp,
ACPI_BUILD_RSDP_FILE, 0);
acpi_build_tables_cleanup(&tables, false);
}
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