According to UEFI spec 2.7, PciIo->GetBarAttributes should return host
address (CPU view ddress) rather than device address (PCI view
address), and
device address = host address + address translation offset,
so we subtract translation from device address before returning.
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Heyi Guo <heyi....@linaro.org>
Signed-off-by: Yi Li <phoenix.l...@huawei.com>
Cc: Ruiyu Ni <ruiyu...@intel.com>
Cc: Ard Biesheuvel <ard.biesheu...@linaro.org>
Cc: Star Zeng <star.z...@intel.com>
Cc: Eric Dong <eric.d...@intel.com>
Cc: Laszlo Ersek <ler...@redhat.com>
Cc: Michael D Kinney <michael.d.kin...@intel.com>
---
MdeModulePkg/Bus/Pci/PciBusDxe/PciIo.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/MdeModulePkg/Bus/Pci/PciBusDxe/PciIo.c
b/MdeModulePkg/Bus/Pci/PciBusDxe/PciIo.c
index fef3eceb7f62..62179eb44bbd 100644
--- a/MdeModulePkg/Bus/Pci/PciBusDxe/PciIo.c
+++ b/MdeModulePkg/Bus/Pci/PciBusDxe/PciIo.c
@@ -1972,6 +1972,10 @@ PciIoGetBarAttributes (
return EFI_UNSUPPORTED;
}
}
+
+ // According to UEFI spec 2.7, we need return host address for
+ // PciIo->GetBarAttributes, and host address = device address -
translation.
+ Descriptor->AddrRangeMin -= Descriptor->AddrTranslationOffset;
}
return EFI_SUCCESS;
--
2.7.4
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