acpi: Add IPMI table entries
Use the ACPI table construction tools to create an ACPI entry for IPMI. This adds a function called build_acpi_ipmi_devices to add an DSDT entry for IPMI if IPMI is compiled in and an IPMI device exists. It also adds a dummy function if IPMI is not compiled in. This conforms to section "C3-2 Locating IPMI System Interfaces in ACPI Name Space" in the IPMI 2.0 specification. Signed-off-by: Corey Minyard <cminyard@mvista.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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@ -6,3 +6,4 @@ obj-$(CONFIG_ACPI_NVDIMM) += nvdimm.o
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common-obj-$(CONFIG_ACPI) += acpi_interface.o
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common-obj-$(CONFIG_ACPI) += bios-linker-loader.o
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common-obj-$(CONFIG_ACPI) += aml-build.o
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common-obj-$(call land,$(CONFIG_ACPI),$(CONFIG_IPMI)) += ipmi.o
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105
hw/acpi/ipmi.c
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105
hw/acpi/ipmi.c
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@ -0,0 +1,105 @@
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/*
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* IPMI ACPI firmware handling
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*
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* Copyright (c) 2015,2016 Corey Minyard, MontaVista Software, LLC
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*/
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#include "qemu/osdep.h"
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#include "hw/ipmi/ipmi.h"
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#include "hw/acpi/aml-build.h"
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#include "hw/acpi/acpi.h"
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#include "hw/acpi/ipmi.h"
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static Aml *aml_ipmi_crs(IPMIFwInfo *info)
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{
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Aml *crs = aml_resource_template();
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/*
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* The base address is fixed and cannot change. That may be different
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* if someone does PCI, but we aren't there yet.
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*/
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switch (info->memspace) {
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case IPMI_MEMSPACE_IO:
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aml_append(crs, aml_io(AML_DECODE16, info->base_address,
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info->base_address + info->register_length - 1,
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info->register_spacing, info->register_length));
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break;
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case IPMI_MEMSPACE_MEM32:
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aml_append(crs,
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aml_dword_memory(AML_POS_DECODE,
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AML_MIN_FIXED, AML_MAX_FIXED,
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AML_NON_CACHEABLE, AML_READ_WRITE,
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0xffffffff,
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info->base_address,
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info->base_address + info->register_length - 1,
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info->register_spacing, info->register_length));
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break;
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case IPMI_MEMSPACE_MEM64:
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aml_append(crs,
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aml_qword_memory(AML_POS_DECODE,
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AML_MIN_FIXED, AML_MAX_FIXED,
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AML_NON_CACHEABLE, AML_READ_WRITE,
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0xffffffffffffffffULL,
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info->base_address,
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info->base_address + info->register_length - 1,
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info->register_spacing, info->register_length));
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break;
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case IPMI_MEMSPACE_SMBUS:
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aml_append(crs, aml_return(aml_int(info->base_address)));
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break;
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default:
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abort();
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}
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if (info->interrupt_number) {
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aml_append(crs, aml_irq_no_flags(info->interrupt_number));
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}
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return crs;
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}
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static Aml *aml_ipmi_device(IPMIFwInfo *info)
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{
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Aml *dev;
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uint16_t version = ((info->ipmi_spec_major_revision << 8)
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| (info->ipmi_spec_minor_revision << 4));
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assert(info->ipmi_spec_minor_revision <= 15);
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dev = aml_device("MI%d", info->uuid);
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aml_append(dev, aml_name_decl("_HID", aml_eisaid("IPI0001")));
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aml_append(dev, aml_name_decl("_STR", aml_string("ipmi_%s",
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info->interface_name)));
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aml_append(dev, aml_name_decl("_UID", aml_int(info->uuid)));
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aml_append(dev, aml_name_decl("_CRS", aml_ipmi_crs(info)));
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aml_append(dev, aml_name_decl("_IFT", aml_int(info->interface_type)));
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aml_append(dev, aml_name_decl("_SRV", aml_int(version)));
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return dev;
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}
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void build_acpi_ipmi_devices(Aml *scope, BusState *bus)
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{
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BusChild *kid;
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QTAILQ_FOREACH(kid, &bus->children, sibling) {
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IPMIInterface *ii;
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IPMIInterfaceClass *iic;
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IPMIFwInfo info;
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Object *obj = object_dynamic_cast(OBJECT(kid->child),
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TYPE_IPMI_INTERFACE);
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if (!obj) {
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continue;
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}
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ii = IPMI_INTERFACE(obj);
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iic = IPMI_INTERFACE_GET_CLASS(obj);
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iic->get_fwinfo(ii, &info);
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aml_append(scope, aml_ipmi_device(&info));
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}
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}
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@ -58,6 +58,8 @@
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#include "qapi/qmp/qint.h"
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#include "qom/qom-qobject.h"
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#include "hw/acpi/ipmi.h"
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/* These are used to size the ACPI tables for -M pc-i440fx-1.7 and
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* -M pc-i440fx-2.0. Even if the actual amount of AML generated grows
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* a little bit, there should be plenty of free space since the DSDT
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@ -1334,8 +1336,10 @@ static Aml *build_com_device_aml(uint8_t uid)
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static void build_isa_devices_aml(Aml *table)
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{
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ISADevice *fdc = pc_find_fdc0();
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bool ambiguous;
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Aml *scope = aml_scope("_SB.PCI0.ISA");
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Object *obj = object_resolve_path_type("", TYPE_ISA_BUS, &ambiguous);
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aml_append(scope, build_rtc_device_aml());
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aml_append(scope, build_kbd_device_aml());
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@ -1347,6 +1351,14 @@ static void build_isa_devices_aml(Aml *table)
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aml_append(scope, build_com_device_aml(1));
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aml_append(scope, build_com_device_aml(2));
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if (ambiguous) {
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error_report("Multiple ISA busses, unable to define IPMI ACPI data");
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} else if (!obj) {
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error_report("No ISA bus, unable to define IPMI ACPI data");
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} else {
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build_acpi_ipmi_devices(scope, BUS(obj));
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}
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aml_append(table, scope);
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}
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22
include/hw/acpi/ipmi.h
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22
include/hw/acpi/ipmi.h
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@ -0,0 +1,22 @@
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/*
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* QEMU IPMI ACPI handling
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*
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* Copyright (c) 2015,2016 Corey Minyard <cminyard@mvista.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*/
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#ifndef HW_ACPI_IPMI_H
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#define HW_ACPI_IPMI_H
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#include "qemu/osdep.h"
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#include "hw/acpi/aml-build.h"
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/*
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* Add ACPI IPMI entries for all registered IPMI devices whose parent
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* bus matches the given bus. The resource is the ACPI resource that
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* contains the IPMI device, this is required for the I2C CRS.
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*/
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void build_acpi_ipmi_devices(Aml *table, BusState *bus);
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#endif /* HW_ACPI_IPMI_H */
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@ -42,3 +42,4 @@ stub-obj-y += target-get-monitor-def.o
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stub-obj-y += vhost.o
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stub-obj-y += iohandler.o
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stub-obj-y += smbios_type_38.o
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stub-obj-y += ipmi.o
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14
stubs/ipmi.c
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14
stubs/ipmi.c
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@ -0,0 +1,14 @@
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/*
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* IPMI ACPI firmware handling
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*
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* Copyright (c) 2015,2016 Corey Minyard, MontaVista Software, LLC
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*/
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#include "hw/acpi/ipmi.h"
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void build_acpi_ipmi_devices(Aml *table, BusState *bus)
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{
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}
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