POWERing up gem5
summary
A three year university project adds a full system POWER9 model to gem5 and demonstrates a successful boot of OPAL firmware and the Linux kernel on that model. Work implements 64-bit little-endian execution, privilege and atomic instructions, radix page table MMU support, exception and external interrupt handling, doorbell and timer support, serial console and GDB integration, and preliminary SMP via doorbell wakeups. Code, modified OPAL and the patched Linux are on GitHub and upstreaming is in progress OPAL firmware boots Linux on gem5.
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chapters (13)
- 0:00Introduction to gem5 Power models
- 4:37Why Power support was needed
- 7:36Initial Power model status
- 9:23Collaboration model with IBM
- 12:16Phase one: Instruction support
- 15:52Bare-metal program execution
- 18:26Exception handling and faults
- 21:15Kernel logging and debugging
- 23:49Linux kernel boot success
- 25:57SMT and multiprocessor support
- 27:24Current project status
- 29:11Future roadmap and vision
- 31:45Community feedback and validation
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