Tasks UefiCpuPkg CpuDxe MP support

Enable multiprocessor support for IA32 & X64 within UefiCpuPkg/CpuDxe. (Implement MdePkg/Include/Protocol/MpService.h)

Table of Contents Details Documentation Development environment Test environments Sub-goals Getting Started Further Discussion See Also

Details

Intel® 64 and IA-32 Architectures Software Developer's Manual Volume 3A: System Programming Guide, Part 1

Building: This project can be completed on any edk2 supported OS or toolchain.

Any assembly code should be ported to all assembly formats.

Some possible sub-goals for the driver

Successfully start up other processor (Startup IPI)
~~Transition from 16-bit real to 32-bit flat mode~~ (see ap-startup-example below)
~~Transition from 16-bit real to 64-bit long mode~~ (see ap-startup-example below)
~~AP starts running CpuDxe code~~ (see ap-startup-example below)
AP can run code requested by MpService protocol (StartupAllAPs/StartupThisAP)
- See StartCore below
Support for remaining MpService protocol functions
~~Dynamically update ACPI tables in OVMF based on number of processors~~
Refer to "Software Developer's Manual" to research further initialization requirements.

Code to start from: https://github.com/jljusten/edk2/tree/ap-startup-example
- This code already starts the APs. This should provide most assembly code needed for this task.
- Tested with QEMU/OVMF on Linux
The StartCore project provides a sample program that uses the MpServices protocol
- https://svn.code.sf.net/p/edk2-startcore/code/StartCorePkg (svn)
EmulatorPkg already supports MpServices, so this may be used as a reference.

This project would be for an edk2 based driver, so please discuss the project on edk2-devel. For IRC, #edk2 on irc.oftc.net.