UCALL_PIO_PORT 35 tools/testing/selftests/kvm/lib/x86_64/ucall.c : : [port] "d" (UCALL_PIO_PORT), "D" (&uc) : "rax", "memory"); UCALL_PIO_PORT 43 tools/testing/selftests/kvm/lib/x86_64/ucall.c if (run->exit_reason == KVM_EXIT_IO && run->io.port == UCALL_PIO_PORT) { UCALL_PIO_PORT 37 tools/testing/selftests/kvm/x86_64/sync_regs_test.c : : [port] "d" (UCALL_PIO_PORT) : "rax", "rbx");