acpi: enumerate SMB bridge automatically along with other PCI devices

to make that happen (bridge sits at _ADR: 0x001F0003),
relax PCI enumeration logic to include devices with *function* > 0
if device has something to say about itself (i.e. has build_dev_aml
callback set).

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Message-Id: <20221017102146.2254096-8-imammedo@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c
index e1483bb11a5464a706bace4081f4245f3c4c3bd0..916343d8d6d597231e51fb63da1d5410337099e8 100644 (file)
--- a/hw/i386/acpi-build.c
+++ b/hw/i386/acpi-build.c
@@ -448,9 +448,10 @@ static void build_append_pci_bus_devices(Aml *parent_scope, PCIBus *bus,
             /*
              * allow describing coldplugged bridges in ACPI even if they are not
              * on function 0, as they are not unpluggable, for all other devices
-             * generate description only for function 0 per slot
+             * generate description only for function 0 per slot, and for other
+             * functions if device on function provides its own AML
              */
-            if (func && !bridge_in_acpi) {
+            if (func && !bridge_in_acpi && !get_dev_aml_func(DEVICE(pdev))) {
                 continue;
             }
         } else {
@@ -1319,25 +1320,6 @@ static Aml *build_q35_osc_method(bool enable_native_pcie_hotplug)
     return method;
 }
 
-static void build_smb0(Aml *table, int devnr, int func)
-{
-    Aml *scope = aml_scope("_SB.PCI0");
-    Aml *dev = aml_device("SMB0");
-    bool ambiguous;
-    Object *obj;
-    /*
-     * temporarily fish out device hosting SMBUS, build_smb0 will be gone once
-     * PCI enumeration will be switched to call_dev_aml_func()
-     */
-    obj = object_resolve_path_type("", TYPE_ICH9_SMB_DEVICE, &ambiguous);
-    assert(obj && !ambiguous);
-
-    aml_append(dev, aml_name_decl("_ADR", aml_int(devnr << 16 | func)));
-    call_dev_aml_func(DEVICE(obj), dev);
-    aml_append(scope, dev);
-    aml_append(table, scope);
-}
-
 static void build_acpi0017(Aml *table)
 {
     Aml *dev, *scope, *method;
@@ -1440,9 +1422,6 @@ build_dsdt(GArray *table_data, BIOSLinker *linker,
             build_x86_acpi_pci_hotplug(dsdt, pm->pcihp_io_base);
         }
         build_q35_pci0_int(dsdt);
-        if (pcms->smbus) {
-            build_smb0(dsdt, ICH9_SMB_DEV, ICH9_SMB_FUNC);
-        }
     }
 
     if (misc->has_hpet) {