Re: [PATCH v3 3/3] acpi: i386: Move VMBus DSDT entry to SB

[Jon Doron]

On 23/06/2020, Igor Mammedov wrote:
On Thu, 18 Jun 2020 06:00:27 +0300
Jon Doron <ari...@gmail.com> wrote:
Signed-off-by: Jon Doron <ari...@gmail.com>
---
 hw/i386/acpi-build.c | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c
index 6d9df38e31..38be9e5a58 100644
--- a/hw/i386/acpi-build.c
+++ b/hw/i386/acpi-build.c
@@ -1092,7 +1092,6 @@ static Aml *build_vmbus_device_aml(VMBusBridge 
*vmbus_bridge)
 static void build_isa_devices_aml(Aml *table)
 {
     ISADevice *fdc = pc_find_fdc0();
-    VMBusBridge *vmbus_bridge = vmbus_bridge_find();
     bool ambiguous;

     Aml *scope = aml_scope("_SB.PCI0.ISA");
@@ -1113,10 +1112,6 @@ static void build_isa_devices_aml(Aml *table)
         isa_build_aml(ISA_BUS(obj), scope);
     }

-    if (vmbus_bridge) {
-        aml_append(scope, build_vmbus_device_aml(vmbus_bridge));
-    }
-
     aml_append(table, scope);
 }

@@ -1661,6 +1656,7 @@ build_dsdt(GArray *table_data, BIOSLinker *linker,
     PCIBus *bus = NULL;
     TPMIf *tpm = tpm_find();
     int i;
+    VMBusBridge *vmbus_bridge = vmbus_bridge_find();

     dsdt = init_aml_allocator();

@@ -1675,6 +1671,9 @@ build_dsdt(GArray *table_data, BIOSLinker *linker,
         aml_append(dev, aml_name_decl("_ADR", aml_int(0)));
         aml_append(dev, aml_name_decl("_UID", aml_int(1)));
         aml_append(sb_scope, dev);
+        if (vmbus_bridge) {
+            aml_append(sb_scope, build_vmbus_device_aml(vmbus_bridge));
+        }
         aml_append(dsdt, sb_scope);

         build_hpet_aml(dsdt);
@@ -1692,6 +1691,9 @@ build_dsdt(GArray *table_data, BIOSLinker *linker,
         aml_append(dev, aml_name_decl("_UID", aml_int(1)));
         aml_append(dev, build_q35_osc_method());
         aml_append(sb_scope, dev);
+        if (vmbus_bridge) {
+            aml_append(sb_scope, build_vmbus_device_aml(vmbus_bridge));
+        }
         aml_append(dsdt, sb_scope);

         build_hpet_aml(dsdt);
why are you duplicating instead of putting one if () block after

if (misc->is_piix4) {
} else {
}

?


Well it seems like Windows is very "picky" about where you declare the 
VMBS not sure why if i had moved it to the suggested location as such

if (misc->is_piix4) {
} else {
}

if (vmbus_bridge) {
    aml_append(sb_scope, build_vmbus_device_aml(vmbus_bridge));
    aml_append(dsdt, sb_scope);
}

Windows would BSOD right away with ACPI error.

Same goes for declaring it before PCI0 device...

-- Jon.