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pc: Add an SMB0 ACPI device to q35

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This is so I2C devices can be found in the ACPI namespace.  Currently
that's only IPMI, but devices can be easily added now.

Adding the devices required some PCI information, and the bus itself
to be added to the PCMachineState structure.

Note that this only works on Q35, the ACPI for PIIX4 is not capable
of handling an SMBus device.

Cc: Michael S. Tsirkin <mst@redhat.com>
Cc: Igor Mammedov <imammedo@redhat.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Corey Minyard 2016-05-12 20:43:45 -05:00
parent 576d05b67f
commit ebe15582ca
12 changed files with 28 additions and 10 deletions
Download patch file Download diff file Expand all files Collapse all files

15
hw/i386/acpi-build.c
View file

@ -1809,6 +1809,18 @@ static Aml *build_q35_osc_method(void)
return method;
}
static void build_smb0(Aml *table, I2CBus *smbus, int devnr, int func)
{
Aml *scope = aml_scope("_SB.PCI0");
Aml *dev = aml_device("SMB0");
aml_append(dev, aml_name_decl("_HID", aml_eisaid("APP0005")));
aml_append(dev, aml_name_decl("_ADR", aml_int(devnr << 16 | func)));
build_acpi_ipmi_devices(dev, BUS(smbus), "\\_SB.PCI0.SMB0");
aml_append(scope, dev);
aml_append(table, scope);
}
static void
build_dsdt(GArray *table_data, BIOSLinker *linker,
AcpiPmInfo *pm, AcpiMiscInfo *misc,
@ -1862,6 +1874,9 @@ build_dsdt(GArray *table_data, BIOSLinker *linker,
build_q35_isa_bridge(dsdt);
build_isa_devices_aml(dsdt);
build_q35_pci0_int(dsdt);
if (pcms->smbus && !pcmc->do_not_add_smb_acpi) {
build_smb0(dsdt, pcms->smbus, ICH9_SMB_DEV, ICH9_SMB_FUNC);
}
}
if (pcmc->legacy_cpu_hotplug) {