[PATCH v5 15/43] acpi/pci: Consolidate host bridge setup

[Jonathan Cameron via <qemu-devel@nongnu.org>]

From: Ben Widawsky <ben.widawsky@intel.com>

This cleanup will make it easier to add support for CXL to the mix.

Signed-off-by: Ben Widawsky <ben.widawsky@intel.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
---
v5: Make the PCI bus type a typed enum.

 hw/i386/acpi-build.c | 39 ++++++++++++++++++++++-----------------
 1 file changed, 22 insertions(+), 17 deletions(-)

diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c
index ce823e8fcb..09940f6e84 100644
--- a/hw/i386/acpi-build.c
+++ b/hw/i386/acpi-build.c
@@ -1398,6 +1398,24 @@ static void build_smb0(Aml *table, I2CBus *smbus, int devnr, int func)
     aml_append(table, scope);
 }
 
+typedef enum { PCI, PCIE } PCIBusType;
+static void init_pci_acpi(Aml *dev, int uid, PCIBusType type,
+                          bool native_pcie_hp)
+{
+    if (type == PCI) {
+        aml_append(dev, aml_name_decl("_HID", aml_eisaid("PNP0A03")));
+        aml_append(dev, aml_name_decl("_ADR", aml_int(0)));
+        aml_append(dev, aml_name_decl("_UID", aml_int(uid)));
+    } else {
+        aml_append(dev, aml_name_decl("_HID", aml_eisaid("PNP0A08")));
+        aml_append(dev, aml_name_decl("_CID", aml_eisaid("PNP0A03")));
+        aml_append(dev, aml_name_decl("_ADR", aml_int(0)));
+        aml_append(dev, aml_name_decl("_UID", aml_int(uid)));
+        /* Expander bridges do not have ACPI PCI Hot-plug enabled */
+        aml_append(dev, build_q35_osc_method(native_pcie_hp));
+    }
+}
+
 static void
 build_dsdt(GArray *table_data, BIOSLinker *linker,
            AcpiPmInfo *pm, AcpiMiscInfo *misc,
@@ -1429,9 +1447,7 @@ build_dsdt(GArray *table_data, BIOSLinker *linker,
     if (misc->is_piix4) {
         sb_scope = aml_scope("_SB");
         dev = aml_device("PCI0");
-        aml_append(dev, aml_name_decl("_HID", aml_eisaid("PNP0A03")));
-        aml_append(dev, aml_name_decl("_ADR", aml_int(0)));
-        aml_append(dev, aml_name_decl("_UID", aml_int(pcmc->pci_root_uid)));
+        init_pci_acpi(dev, pcmc->pci_root_uid, PCI, false);
         aml_append(sb_scope, dev);
         aml_append(dsdt, sb_scope);
 
@@ -1447,11 +1463,7 @@ build_dsdt(GArray *table_data, BIOSLinker *linker,
     } else {
         sb_scope = aml_scope("_SB");
         dev = aml_device("PCI0");
-        aml_append(dev, aml_name_decl("_HID", aml_eisaid("PNP0A08")));
-        aml_append(dev, aml_name_decl("_CID", aml_eisaid("PNP0A03")));
-        aml_append(dev, aml_name_decl("_ADR", aml_int(0)));
-        aml_append(dev, aml_name_decl("_UID", aml_int(pcmc->pci_root_uid)));
-        aml_append(dev, build_q35_osc_method(!pm->pcihp_bridge_en));
+        init_pci_acpi(dev, pcmc->pci_root_uid, PCIE, !pm->pcihp_bridge_en);
         aml_append(sb_scope, dev);
         if (mcfg_valid) {
             aml_append(sb_scope, build_q35_dram_controller(&mcfg));
@@ -1562,17 +1574,10 @@ build_dsdt(GArray *table_data, BIOSLinker *linker,
 
             scope = aml_scope("\\_SB");
             dev = aml_device("PC%.02X", bus_num);
-            aml_append(dev, aml_name_decl("_UID", aml_int(bus_num)));
             aml_append(dev, aml_name_decl("_BBN", aml_int(bus_num)));
-            if (pci_bus_is_express(bus)) {
-                aml_append(dev, aml_name_decl("_HID", aml_eisaid("PNP0A08")));
-                aml_append(dev, aml_name_decl("_CID", aml_eisaid("PNP0A03")));
 
-                /* Expander bridges do not have ACPI PCI Hot-plug enabled */
-                aml_append(dev, build_q35_osc_method(true));
-            } else {
-                aml_append(dev, aml_name_decl("_HID", aml_eisaid("PNP0A03")));
-            }
+            init_pci_acpi(dev, bus_num,
+                          pci_bus_is_express(bus) ? PCIE : PCI, true);
 
             if (numa_node != NUMA_NODE_UNASSIGNED) {
                 aml_append(dev, aml_name_decl("_PXM", aml_int(numa_node)));
-- 
2.32.0