kvm_read_reg
id = kvm_read_reg(vcpu, LOONGARCH_GPR_A1);
data = kvm_read_reg(vcpu, LOONGARCH_GPR_A2);
kvm_read_reg(vcpu, LOONGARCH_GPR_A1),
kvm_read_reg(vcpu, LOONGARCH_GPR_A2)
min = kvm_read_reg(vcpu, LOONGARCH_GPR_A3);
unsigned long func = kvm_read_reg(vcpu, LOONGARCH_GPR_A0);
vcpu->run->hypercall.args[0] = kvm_read_reg(vcpu, LOONGARCH_GPR_A0);
vcpu->run->hypercall.args[1] = kvm_read_reg(vcpu, LOONGARCH_GPR_A1);
vcpu->run->hypercall.args[2] = kvm_read_reg(vcpu, LOONGARCH_GPR_A2);
vcpu->run->hypercall.args[3] = kvm_read_reg(vcpu, LOONGARCH_GPR_A3);
vcpu->run->hypercall.args[4] = kvm_read_reg(vcpu, LOONGARCH_GPR_A4);
vcpu->run->hypercall.args[5] = kvm_read_reg(vcpu, LOONGARCH_GPR_A5);