acpiview is generating errors for the MADT table when it contains a 
Processor Local APIC entry:


ERROR: Unknown Interrupt Controller Structure, Type = 0, Length = 8


Looking at 
ShellPkg/Library/UefiShellAcpiViewCommandLib/Parsers/Madt/MadtParser.c:475 
I see there's no case statement for EFI_ACPI_6_3_PROCESSOR_LOCAL_APIC.


-- 
Rebecca Cran