LOONGARCH_CSR_ISR3
set_gcsr_hw_flag(LOONGARCH_CSR_ISR3);
kvm_restore_hw_gcsr(csr, LOONGARCH_CSR_ISR3);
kvm_save_hw_gcsr(csr, LOONGARCH_CSR_ISR3);
isr = csr_read(LOONGARCH_CSR_ISR3);