diff --git a/MdeModulePkg/Bus/Pci/PciBusDxe/PciIo.c b/MdeModulePkg/Bus/Pci/PciBusDxe/PciIo.c index 190f4b0dc7..fef3eceb7f 100644 --- a/MdeModulePkg/Bus/Pci/PciBusDxe/PciIo.c +++ b/MdeModulePkg/Bus/Pci/PciBusDxe/PciIo.c @@ -1812,10 +1812,14 @@ GetMmioAddressTranslationOffset ( return (UINT64) -1; } + // According to UEFI 2.7, EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL::Configuration() + // returns host address instead of device address, while AddrTranslationOffset + // is not zero, and device address = host address + AddrTranslationOffset, so + // we convert host address to device address for range compare. while (Configuration->Desc == ACPI_ADDRESS_SPACE_DESCRIPTOR) { if ((Configuration->ResType == ACPI_ADDRESS_SPACE_TYPE_MEM) && - (Configuration->AddrRangeMin <= AddrRangeMin) && - (Configuration->AddrRangeMin + Configuration->AddrLen >= AddrRangeMin + AddrLen) + (Configuration->AddrRangeMin + Configuration->AddrTranslationOffset <= AddrRangeMin) && + (Configuration->AddrRangeMin + Configuration->AddrLen + Configuration->AddrTranslationOffset >= AddrRangeMin + AddrLen) ) { return Configuration->AddrTranslationOffset; }