Hi folks,
In NonDiscoverablePciDeviceDxe driver, NonCoherentPciIoAllocateBuffer
may allocate EFI_MEMORY_UC buffer depending on input Attributes and GCD
capabilities. If it does, it actually allocates memory of "device" type
in AArch64, but not "normal uncacheable" memory. For "device" memory
type, it requires restrict access alignment and it may trigger alignment
fault exception with BaseMemoryLibOptDxe in which read/write alignment
is not guaranteed.
Is EFI_MOMORY_WC enough for AArch64 platforms? How about other
platforms, like X86?
Thanks and regards,
Heyi Guo
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