int kvm_riscv_vcpu_exit()

in kvm/vcpu_exit.c [658:701]

• 37 lines of code
• 11 McCabe index (conditional complexity)

int kvm_riscv_vcpu_exit(struct kvm_vcpu *vcpu, struct kvm_run *run,
			struct kvm_cpu_trap *trap)
{
	int ret;

	/* If we got host interrupt then do nothing */
	if (trap->scause & CAUSE_IRQ_FLAG)
		return 1;

	/* Handle guest traps */
	ret = -EFAULT;
	run->exit_reason = KVM_EXIT_UNKNOWN;
	switch (trap->scause) {
	case EXC_VIRTUAL_INST_FAULT:
		if (vcpu->arch.guest_context.hstatus & HSTATUS_SPV)
			ret = virtual_inst_fault(vcpu, run, trap);
		break;
	case EXC_INST_GUEST_PAGE_FAULT:
	case EXC_LOAD_GUEST_PAGE_FAULT:
	case EXC_STORE_GUEST_PAGE_FAULT:
		if (vcpu->arch.guest_context.hstatus & HSTATUS_SPV)
			ret = stage2_page_fault(vcpu, run, trap);
		break;
	case EXC_SUPERVISOR_SYSCALL:
		if (vcpu->arch.guest_context.hstatus & HSTATUS_SPV)
			ret = kvm_riscv_vcpu_sbi_ecall(vcpu, run);
		break;
	default:
		break;
	}

	/* Print details in-case of error */
	if (ret < 0) {
		kvm_err("VCPU exit error %d\n", ret);
		kvm_err("SEPC=0x%lx SSTATUS=0x%lx HSTATUS=0x%lx\n",
			vcpu->arch.guest_context.sepc,
			vcpu->arch.guest_context.sstatus,
			vcpu->arch.guest_context.hstatus);
		kvm_err("SCAUSE=0x%lx STVAL=0x%lx HTVAL=0x%lx HTINST=0x%lx\n",
			trap->scause, trap->stval, trap->htval, trap->htinst);
	}

	return ret;
}