[PATCH v3 07/29] hw/pci-host/gpex-acpi: retrieve and use GED acpi_pcihp setting

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

retrieve the acpi_pcihp option value from the ged. In
case acpi_pcihp is unset we configure pci native hotplug on
pci0. For expander bridges we keep legacy pci native hotplug,
as done on x86 q35.

Signed-off-by: Eric Auger <eric.auger@redhat.com>

---

v2 -> v3:
- don'use the virt arm machine option anymore.
---
 include/hw/pci-host/gpex.h | 1 +
 hw/arm/virt-acpi-build.c   | 5 +++++
 hw/pci-host/gpex-acpi.c    | 3 ++-
 3 files changed, 8 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 7e8e0f0298..d7547c8d3b 100644
--- a/hw/arm/virt-acpi-build.c
+++ b/hw/arm/virt-acpi-build.c
@@ -123,12 +123,17 @@ static void acpi_dsdt_add_pci(Aml *scope, const MemMapEntry *memmap,
                               uint32_t irq, VirtMachineState *vms)
 {
     int ecam_id = VIRT_ECAM_ID(vms->highmem_ecam);
+    AcpiGedState *acpi_ged_state = ACPI_GED(vms->acpi_dev);
+    AcpiPciHpState *pcihp_state = &acpi_ged_state->pcihp_state;
+
+
     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 = !pcihp_state->use_acpi_hotplug_bridge,
     };
 
     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