[PATCH v7 07/36] hw/pci-host/gpex-acpi: Use GED acpi pcihp property

[Eric Auger <eric.auger@redhat.com>]

Retrieve the acpi pcihp property value from the ged. In case this latter
is not set, PCI native hotplug is used on pci0. For expander bridges we
keep pci native hotplug, as done on x86 q35.

Signed-off-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Jonathan Cameron <jonathan.cameron@huawei.com>

---
v4 -> v5:
- check vms->acpi_dev

v3 -> v4:
- Use object_property_get_bool (Igor)
- rework the commit description (Igor)

v2 -> v3:
- don'use the virt arm machine option anymore.
---
 include/hw/pci-host/gpex.h | 1 +
 hw/arm/virt-acpi-build.c   | 9 +++++++++
 hw/pci-host/gpex-acpi.c    | 3 ++-
 3 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/include/hw/pci-host/gpex.h b/include/hw/pci-host/gpex.h
index 84471533af..feaf827474 100644
--- a/include/hw/pci-host/gpex.h
+++ b/include/hw/pci-host/gpex.h
@@ -45,6 +45,7 @@ struct GPEXConfig {
     MemMapEntry pio;
     int         irq;
     PCIBus      *bus;
+    bool        pci_native_hotplug;
 };
 
 typedef struct GPEXIrq GPEXIrq;
diff --git a/hw/arm/virt-acpi-build.c b/hw/arm/virt-acpi-build.c
index 0dfb8ec2c3..8768d5ce50 100644
--- a/hw/arm/virt-acpi-build.c
+++ b/hw/arm/virt-acpi-build.c
@@ -144,12 +144,21 @@ static void acpi_dsdt_add_pci(Aml *scope, const MemMapEntry *memmap,
     int ecam_id = VIRT_ECAM_ID(vms->highmem_ecam);
     bool cxl_present = false;
     PCIBus *bus = vms->bus;
+    bool acpi_pcihp = false;
+
+    if (vms->acpi_dev) {
+        acpi_pcihp = object_property_get_bool(OBJECT(vms->acpi_dev),
+                                              ACPI_PM_PROP_ACPI_PCIHP_BRIDGE,
+                                              NULL);
+    }
+
     struct GPEXConfig cfg = {
         .mmio32 = memmap[VIRT_PCIE_MMIO],
         .pio    = memmap[VIRT_PCIE_PIO],
         .ecam   = memmap[ecam_id],
         .irq    = irq,
         .bus    = vms->bus,
+        .pci_native_hotplug = !acpi_pcihp,
     };
 
     if (vms->highmem_mmio) {
diff --git a/hw/pci-host/gpex-acpi.c b/hw/pci-host/gpex-acpi.c
index 80fc2bf032..44737a8d81 100644
--- a/hw/pci-host/gpex-acpi.c
+++ b/hw/pci-host/gpex-acpi.c
@@ -203,6 +203,7 @@ void acpi_dsdt_add_gpex(Aml *scope, struct GPEXConfig *cfg)
             if (is_cxl) {
                 build_cxl_osc_method(dev);
             } else {
+                /* pxb bridges do not have ACPI PCI Hot-plug enabled */
                 acpi_dsdt_add_host_bridge_methods(dev, true);
             }
 
@@ -278,7 +279,7 @@ void acpi_dsdt_add_gpex(Aml *scope, struct GPEXConfig *cfg)
     }
     aml_append(dev, aml_name_decl("_CRS", rbuf));
 
-    acpi_dsdt_add_host_bridge_methods(dev, true);
+    acpi_dsdt_add_host_bridge_methods(dev, cfg->pci_native_hotplug);
 
     Aml *dev_res0 = aml_device("%s", "RES0");
     aml_append(dev_res0, aml_name_decl("_HID", aml_string("PNP0C02")));
-- 
2.49.0