bc8f29df27
Move aml_pci_edsm to pci-bridge.c since we want to reuse that for ARM and acpi-index support. Also rename it into build_pci_bridge_edsm. Signed-off-by: Eric Auger <eric.auger@redhat.com> Reviewed-by: Jonathan Cameron <jonathan.cameron@huawei.com> Reviewed-by: Igor Mammedov <imammedo@redhat.com> Message-Id: <20250714080639.2525563-17-eric.auger@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
91 lines
2.5 KiB
C
91 lines
2.5 KiB
C
/*
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* QEMU ACPI PCI bridge
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*
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* Copyright (c) 2023 Red Hat, Inc.
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*
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* Author:
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* Igor Mammedov <imammedo@redhat.com>
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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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/acpi/pci.h"
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#include "hw/pci/pci_bridge.h"
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#include "hw/acpi/pcihp.h"
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void build_pci_bridge_aml(AcpiDevAmlIf *adev, Aml *scope)
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{
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PCIBridge *br = PCI_BRIDGE(adev);
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if (!DEVICE(br)->hotplugged) {
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PCIBus *sec_bus = pci_bridge_get_sec_bus(br);
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build_append_pci_bus_devices(scope, sec_bus);
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/*
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* generate hotplug slots descriptors if
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* bridge has ACPI PCI hotplug attached,
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*/
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if (object_property_find(OBJECT(sec_bus), ACPI_PCIHP_PROP_BSEL)) {
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build_append_pcihp_slots(scope, sec_bus);
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}
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}
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}
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Aml *build_pci_bridge_edsm(void)
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{
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Aml *method, *ifctx;
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Aml *zero = aml_int(0);
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Aml *func = aml_arg(2);
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Aml *ret = aml_local(0);
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Aml *aidx = aml_local(1);
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Aml *params = aml_arg(4);
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method = aml_method("EDSM", 5, AML_SERIALIZED);
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/* get supported functions */
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ifctx = aml_if(aml_equal(func, zero));
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{
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/* 1: have supported functions */
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/* 7: support for function 7 */
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const uint8_t caps = 1 | BIT(7);
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build_append_pci_dsm_func0_common(ifctx, ret);
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aml_append(ifctx, aml_store(aml_int(caps), aml_index(ret, zero)));
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aml_append(ifctx, aml_return(ret));
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}
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aml_append(method, ifctx);
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/* handle specific functions requests */
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/*
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* PCI Firmware Specification 3.1
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* 4.6.7. _DSM for Naming a PCI or PCI Express Device Under
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* Operating Systems
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*/
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ifctx = aml_if(aml_equal(func, aml_int(7)));
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{
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Aml *pkg = aml_package(2);
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aml_append(pkg, zero);
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/* optional, if not impl. should return null string */
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aml_append(pkg, aml_string("%s", ""));
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aml_append(ifctx, aml_store(pkg, ret));
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/*
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* IASL is fine when initializing Package with computational data,
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* however it makes guest unhappy /it fails to process such AML/.
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* So use runtime assignment to set acpi-index after initializer
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* to make OSPM happy.
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*/
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aml_append(ifctx,
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aml_store(aml_derefof(aml_index(params, aml_int(0))), aidx));
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aml_append(ifctx, aml_store(aidx, aml_index(ret, zero)));
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aml_append(ifctx, aml_return(ret));
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}
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aml_append(method, ifctx);
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return method;
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}
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