diff options
Diffstat (limited to 'OvmfPkg/QemuVideoDxe')
| -rw-r--r-- | OvmfPkg/QemuVideoDxe/Driver.c | 22 |
1 files changed, 21 insertions, 1 deletions
diff --git a/OvmfPkg/QemuVideoDxe/Driver.c b/OvmfPkg/QemuVideoDxe/Driver.c index e8a613ef33..522110ef4e 100644 --- a/OvmfPkg/QemuVideoDxe/Driver.c +++ b/OvmfPkg/QemuVideoDxe/Driver.c @@ -201,6 +201,7 @@ QemuVideoControllerDriverStart ( PCI_TYPE00 Pci;
QEMU_VIDEO_CARD *Card;
EFI_PCI_IO_PROTOCOL *ChildPciIo;
+ UINT64 SupportedVgaIo;
OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
@@ -278,12 +279,31 @@ QemuVideoControllerDriverStart ( }
//
+ // Get supported PCI attributes
+ //
+ Status = Private->PciIo->Attributes (
+ Private->PciIo,
+ EfiPciIoAttributeOperationSupported,
+ 0,
+ &SupportedVgaIo
+ );
+ if (EFI_ERROR (Status)) {
+ goto ClosePciIo;
+ }
+
+ SupportedVgaIo &= (UINT64)(EFI_PCI_IO_ATTRIBUTE_VGA_IO | EFI_PCI_IO_ATTRIBUTE_VGA_IO_16);
+ if (SupportedVgaIo == 0) {
+ Status = EFI_UNSUPPORTED;
+ goto ClosePciIo;
+ }
+
+ //
// Set new PCI attributes
//
Status = Private->PciIo->Attributes (
Private->PciIo,
EfiPciIoAttributeOperationEnable,
- EFI_PCI_DEVICE_ENABLE | EFI_PCI_IO_ATTRIBUTE_VGA_MEMORY | EFI_PCI_IO_ATTRIBUTE_VGA_IO,
+ EFI_PCI_DEVICE_ENABLE | EFI_PCI_IO_ATTRIBUTE_VGA_MEMORY | SupportedVgaIo,
NULL
);
if (EFI_ERROR (Status)) {
|