GPU-accelerated server platforms that share most of their hardware architecture often require separate firmware images due to minor hardware differences--different component identifiers, thermal profiles, or interconnect topologies. I built nvidia-pcm to eliminate that overhead. nvidia-pcm is a platform configuration manager for NVBMC, NVIDIA's OpenBMC-based firmware distribution, that enables a single firmware image to serve multiple platform variants. At boot, nvidia-pcm queries hardware identity data over D-Bus and exports the correct platform-specific configuration as environment variables. Downstream services read those variables without knowing or caring which hardware variant they are running on. The result is that platform differences are captured entirely in declarative JSON files, not in separate build artifacts. This paper describes the architecture, implementation, and deployment impact of nvidia-pcm, and shares lessons learned from solving the platform-identity problem at a deliberately minimal level of abstraction--prioritizing adoption simplicity over comprehensive hardware modeling.

翻译：共享大部分硬件架构的GPU加速服务器平台常因细微硬件差异——如不同的组件标识符、热配置文件或互连拓扑——而需要单独固件镜像。为此，我开发了nvidia-pcm以消除这种开销。nvidia-pcm是面向NVBMC（NVIDIA基于OpenBMC的固件发行版）的平台配置管理器，它使得单一固件镜像能够适配多种平台变体。在启动时，nvidia-pcm通过D-Bus查询硬件标识数据，并将正确的平台专属配置导出为环境变量。下游服务读取这些变量时，无需知晓亦无需关注其运行的硬件变体。其结果是，平台差异完全被封装在声明式JSON文件中，而非独立的构建产物内。本文阐述了nvidia-pcm的架构设计、实现方案与部署影响，并分享了在刻意保持最低抽象层级解决平台标识问题过程中获得的经验——即优先考虑部署简易性，而非追求全面的硬件建模。