> > FRED CPU states are managed in 10 FRED MSRs, in addtion to a few > > existing CPU registers and MSRs, e.g., the CR4.FRED bit. > > > > Add the 10 new FRED MSRs to x86 CPUArchState for live migration support. > > > > IMO, it's better to split this patch into two, one is for FRED MSR access, the other > is for LM support. > > And move the FRED MSRs from basic x86_cpu part to .subsections part because > FRED doesn't belong to basic CPU registers. In the .subsections part, you may > define a struct to hold FRED MSRs then add .needed callback helper for QEMU to > query whether FRED MSRs are necessary for live migration. Good point! > > See other features, e.g., vmstate_msr_intel_sgx
