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hw/acpi: fix Q35 support for legacy Windows OS 

Legacy Windows operating systems like Windows XP and Windows 2003
require _DIS method to be present for all interrupt links.

PC machines already have a no-op implemented for GSI links, add
it also in Q35.

Signed-off-by: Marcel Apfelbaum <marcel@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
This commit is contained in:
Marcel Apfelbaum 2016-03-07 21:14:37 +02:00 committed by Michael S. Tsirkin
parent 7335a95abd
commit c82f503dd5
1 changed files with 6 additions and 0 deletions
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6
hw/i386/acpi-build.c
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@ -1556,6 +1556,12 @@ static Aml *build_gsi_link_dev(const char *name, uint8_t uid, uint8_t gsi)
aml_append(dev, aml_name_decl("_CRS", crs));
/*
* _DIS can be no-op because the interrupt cannot be disabled.
*/
method = aml_method("_DIS", 0, AML_NOTSERIALIZED);
aml_append(dev, method);
method = aml_method("_SRS", 1, AML_NOTSERIALIZED);
aml_append(dev, method);