LOONGARCH_CSR_KS2
#define write_gcsr_kscratch2(val) gcsr_write(val, LOONGARCH_CSR_KS2)
#define read_gcsr_kscratch2() gcsr_read(LOONGARCH_CSR_KS2)
#define EXCEPTION_KS2 LOONGARCH_CSR_KS2
set_gcsr_hw_flag(LOONGARCH_CSR_KS2);
kvm_restore_hw_gcsr(csr, LOONGARCH_CSR_KS2);
kvm_save_hw_gcsr(csr, LOONGARCH_CSR_KS2);