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pcihp: make bridge describe itself using AcpiDevAmlIfClass:build_dev_aml

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simplify build_append_pci_bus_devices() a bit by handling bridge
specific logic in bridge dedicated AcpiDevAmlIfClass::build_dev_aml
callback.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Message-Id: <20230112140312.3096331-30-imammedo@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Igor Mammedov 2023-01-12 15:03:01 +01:00 • committed by Michael S. Tsirkin
parent d78644c781
commit 6c36ec46b0
8 changed files with 70 additions and 16 deletions
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1
hw/i386/Kconfig
View file

@ -58,6 +58,7 @@ config PC_ACPI
select ACPI_X86
select ACPI_CPU_HOTPLUG
select ACPI_MEMORY_HOTPLUG
select ACPI_PCI_BRIDGE
select ACPI_VIOT
select SMBUS_EEPROM
select PFLASH_CFI01

17
hw/i386/acpi-build.c
View file

@ -383,8 +383,7 @@ static void build_append_pcihp_notify_entry(Aml *method, int slot)
aml_append(method, if_ctx);
}
static void build_append_pci_bus_devices(Aml *parent_scope, PCIBus *bus,
bool pcihp_bridge_en)
void build_append_pci_bus_devices(Aml *parent_scope, PCIBus *bus)
{
Aml *dev, *notify_method = NULL, *method;
QObject *bsel;
@ -406,7 +405,6 @@ static void build_append_pci_bus_devices(Aml *parent_scope, PCIBus *bus,
/* ACPI spec: 1.0b: Table 6-2 _ADR Object Bus Types, PCI type */
int adr = slot << 16 | func;
bool hotpluggbale_slot = false;
bool bridge_in_acpi = false;
bool cold_plugged_bridge = false;
if (pdev) {
@ -418,7 +416,6 @@ static void build_append_pci_bus_devices(Aml *parent_scope, PCIBus *bus,
*/
cold_plugged_bridge = IS_PCI_BRIDGE(pdev) &&
!DEVICE(pdev)->hotplugged;
bridge_in_acpi = cold_plugged_bridge && pcihp_bridge_en;
hotpluggbale_slot = bsel && dc->hotpluggable &&
!cold_plugged_bridge;
@ -471,16 +468,6 @@ static void build_append_pci_bus_devices(Aml *parent_scope, PCIBus *bus,
call_dev_aml_func(DEVICE(pdev), dev);
if (bridge_in_acpi) {
/*
* device is coldplugged bridge,
* add child device descriptions into its scope
*/
PCIBus *sec_bus = pci_bridge_get_sec_bus(PCI_BRIDGE(pdev));
build_append_pci_bus_devices(dev, sec_bus, pcihp_bridge_en);
}
if (hotpluggbale_slot) {
aml_append(dev, aml_name_decl("_SUN", aml_int(slot)));
/* add _EJ0 to make slot hotpluggable */
@ -1704,7 +1691,7 @@ build_dsdt(GArray *table_data, BIOSLinker *linker,
PCIBus *bus = PCI_HOST_BRIDGE(pci_host)->bus;
Aml *scope = aml_scope("PCI0");
/* Scan all PCI buses. Generate tables to support hotplug. */
build_append_pci_bus_devices(scope, bus, pm->pcihp_bridge_en);
build_append_pci_bus_devices(scope, bus);
aml_append(sb_scope, scope);
}
}