MSR_AMD_NB_CFG
nb_cfg_reg = rdmsr(MSR_AMD_NB_CFG);
wrmsr(MSR_AMD_NB_CFG,
wrmsr(MSR_AMD_NB_CFG, nb_cfg_reg);
const uint_t msr = MSR_AMD_NB_CFG;
wrmsr(MSR_AMD_NB_CFG, rdmsr(MSR_AMD_NB_CFG) | AMD_GH_NB_CFG_EN_ECS);