From: Eric Auger <eric.au...@redhat.com>
Modify the DSDT ACPI table to enable ACPI PCI hotplug.
Signed-off-by: Eric Auger <eric.au...@redhat.com>
Reviewed-by: Jonathan Cameron <jonathan.came...@huawei.com>
Reviewed-by: Igor Mammedov <imamm...@redhat.com>
Message-Id: <20250714080639.2525563-24-eric.au...@redhat.com>
Reviewed-by: Michael S. Tsirkin <m...@redhat.com>
Signed-off-by: Michael S. Tsirkin <m...@redhat.com>
---
include/hw/acpi/pcihp.h | 2 ++
include/hw/arm/virt.h | 1 +
hw/acpi/pcihp.c | 1 -
hw/arm/virt-acpi-build.c | 17 +++++++++++++++++
hw/arm/virt.c | 2 ++
5 files changed, 22 insertions(+), 1 deletion(-)
diff --git a/include/hw/acpi/pcihp.h b/include/hw/acpi/pcihp.h
index 5506a58862..9ff548650b 100644
--- a/include/hw/acpi/pcihp.h
+++ b/include/hw/acpi/pcihp.h
@@ -38,6 +38,8 @@
#define ACPI_PCIHP_SEJ_BASE 0x8
#define ACPI_PCIHP_BNMR_BASE 0x10
+#define ACPI_PCIHP_SIZE 0x0018
+
typedef struct AcpiPciHpPciStatus {
uint32_t up;
uint32_t down;
diff --git a/include/hw/arm/virt.h b/include/hw/arm/virt.h
index 4375819ea0..365a28b082 100644
--- a/include/hw/arm/virt.h
+++ b/include/hw/arm/virt.h
@@ -80,6 +80,7 @@ enum {
VIRT_ACPI_GED,
VIRT_NVDIMM_ACPI,
VIRT_PVTIME,
+ VIRT_ACPI_PCIHP,
VIRT_LOWMEMMAP_LAST,
};
diff --git a/hw/acpi/pcihp.c b/hw/acpi/pcihp.c
index 2db2f16940..f1594e664a 100644
--- a/hw/acpi/pcihp.c
+++ b/hw/acpi/pcihp.c
@@ -43,7 +43,6 @@
#include "qobject/qnum.h"
#include "trace.h"
-#define ACPI_PCIHP_SIZE 0x0018
#define PCI_UP_BASE 0x0000
#define PCI_DOWN_BASE 0x0004
#define PCI_EJ_BASE 0x0008
diff --git a/hw/arm/virt-acpi-build.c b/hw/arm/virt-acpi-build.c
index 3dc1cfcd67..b01fc4f8ef 100644
--- a/hw/arm/virt-acpi-build.c
+++ b/hw/arm/virt-acpi-build.c
@@ -969,6 +969,23 @@ build_dsdt(GArray *table_data, BIOSLinker *linker,
VirtMachineState *vms)
build_append_pcihp_slots(pci0_scope, vms->bus);
}
+ if (vms->acpi_dev) {
+ bool acpi_pcihp;
+
+ acpi_pcihp = object_property_get_bool(OBJECT(vms->acpi_dev),
+ ACPI_PM_PROP_ACPI_PCIHP_BRIDGE,
+ NULL);
+
+ if (acpi_pcihp) {
+ build_acpi_pci_hotplug(dsdt, AML_SYSTEM_MEMORY,
+ memmap[VIRT_ACPI_PCIHP].base);
+ build_append_pcihp_resources(pci0_scope,
+ memmap[VIRT_ACPI_PCIHP].base,
+ memmap[VIRT_ACPI_PCIHP].size);
+
+ build_append_notification_callback(pci0_scope, vms->bus);
+ }
+ }
aml_append(dsdt, pci0_scope);
/* copy AML table into ACPI tables blob */
diff --git a/hw/arm/virt.c b/hw/arm/virt.c
index 8070ff7b11..817adedb31 100644
--- a/hw/arm/virt.c
+++ b/hw/arm/virt.c
@@ -76,6 +76,7 @@
#include "standard-headers/linux/input.h"
#include "hw/arm/smmuv3.h"
#include "hw/acpi/acpi.h"
+#include "hw/acpi/pcihp.h"
#include "target/arm/cpu-qom.h"
#include "target/arm/internals.h"
#include "target/arm/multiprocessing.h"
@@ -186,6 +187,7 @@ static const MemMapEntry base_memmap[] = {
[VIRT_NVDIMM_ACPI] = { 0x09090000, NVDIMM_ACPI_IO_LEN},
[VIRT_PVTIME] = { 0x090a0000, 0x00010000 },
[VIRT_SECURE_GPIO] = { 0x090b0000, 0x00001000 },
+ [VIRT_ACPI_PCIHP] = { 0x090c0000, ACPI_PCIHP_SIZE },
[VIRT_MMIO] = { 0x0a000000, 0x00000200 },
/* ...repeating for a total of NUM_VIRTIO_TRANSPORTS, each of that size */
[VIRT_PLATFORM_BUS] = { 0x0c000000, 0x02000000 },
--
MST
