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); @@ -277,13 +278,32 @@ QemuVideoControllerDriverStart ( goto ClosePciIo; } + // + // 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)) {