Constant AMD_L2_CACHE_INFO 

pub const AMD_L2_CACHE_INFO: CpuidValue<0x8000_0006, 0, ECX, AmdL2CacheInformation>;

Leaf/Function 0x8000_0006, ECX

[amd/vol3]: E.4.5 Function 8000_0006h—L2 Cache and TLB and L3 Cache Information.