On 08/31/2018 12:51 PM, Collin Walling wrote: > A new diagnose instruction, 318, allows the kernel to set an 8-byte "Control > Program Code" (CPC) that is composed of: > > 1-byte Control Program Name Code (CPNC) > 7-byte Control Program Version Code (CPVC) composed of: > 3-bytes for Linux Kernel version (determined at build-time) > 3-bytes for Distribution Identifier (referred to as distro_id; set by Kconfig option) > 1-byte trailing NULL > > Note about distro_id: > [ > The initial idea for the 3-byte distro_id is for each distribution to set > three characters that correspond to their distribution name (for a theoretical > distributor "ACME," they could set "ACM" as the distro_id). A registry file > could be included in the s390 kernel documentation to avoid name collisions. > ] Another (likely better) idea is to use 1-byte for the distribution, followed by 2-bytes for major.minor release. -- Respectfully, - Collin Walling
