mirrors/qemu
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

x86: acpi: workaround Windows not handling name references in Package properly

Browse Source 
it seems that Windows is unable to handle variable references
making it choke up when accessing ASUN during _DSM call
when device is hotplugged (it lists package elements as DataAlias
but despite that later on it misbehaves) with following error
shown up in AMLI debugger (WS2012r2):
    Store(ShiftLeft(One,Arg1="ASUN",) AMLI_ERROR(c0140008): Unexpected argument type
    ValidateArgTypes: expected Arg1 to be type Integer (Type=String)
Similar outcome with WS2022.

Issue is not fatal but as result acpi-index/"PCI Label ID" property
is either not shown in device details page or shows incorrect value.

Fix it by doing assignment of BSEL/ASUN values to package
elements manually after package declaration.

Fix was tested with: WS2012r2, WS2022, RHEL9

Fixes: 467d099a29 (x86: acpi: _DSM: use Package to pass parameters)
Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Message-Id: <20230720133858.1974024-3-imammedo@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Igor Mammedov 2023-07-20 15:38:54 +02:00 committed by Michael S. Tsirkin
parent 45d9d318c8
commit 44d975ef34
1 changed files with 6 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
hw/i386/acpi-build.c
View File

@ -362,9 +362,13 @@ Aml *aml_pci_device_dsm(void)
{
Aml *params = aml_local(0);
Aml *pkg = aml_package(2);
aml_append(pkg, aml_name("BSEL"));
aml_append(pkg, aml_name("ASUN"));
aml_append(pkg, aml_int(0));
aml_append(pkg, aml_int(0));
aml_append(method, aml_store(pkg, params));
aml_append(method,
aml_store(aml_name("BSEL"), aml_index(params, aml_int(0))));
aml_append(method,
aml_store(aml_name("ASUN"), aml_index(params, aml_int(1))));
aml_append(method,
aml_return(aml_call5("PDSM", aml_arg(0), aml_arg(1),
aml_arg(2), aml_arg(3), params))