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Here's a list of features which are/ are not enabled on QEMU on redox:

1. vde (virtual distributed network) - it seems to need a pkg called vde2
2. xen (seems to be a backend support for xen) - we don't support xen (also xen_ctrl_version)
4. xfsctl : mostly used when host uses xfs filesystem
5. membarrier : It seems QEMU may function without it as it "reduces overhead" in multi core systems and not provide vital functionality
6. vhost* : may need KVM; it mainly accelarates virtio to perform better,so excluded
7. pvrdma : not sure if para virtualization works
8. libusb & usb-redir : USB support in redox needs to be verified
9. opengl + virglrenderer : mostly opengl is needed for virgil (which seems to require kvm). It's for 3D acceleration using host graphics cards.
10. gnutls, nettle, gcrypt : cryptography libs, seemed unnecessary (esp. their recipe doesn't exist)
11. vte : support for GTK UI
12. TPM : may need tpm on host
13. libxml2, gio : doesn't exist in recipes
14. secret_keyring : not sure what that is
15. libdaxctl : may be needed only for virtio fs
16. auth-pam : not supported
17. guest agent
18. linux_aio
19. linux_io_uring (future)
20. guest_agent
21. redox is non-kvm, so no linux headers included (while building)

Some libraries that seem to be needed, but are removed:

1. ncursesw : recipe failed to build
2. rdma : needs openfabrics on system - look into it later
3. libssh : probably needs ssh recipe && ssh recipe not building
4. linux-aio : needs aio on devel
5. spice : install later on host machine
6. smartcard : Install libcacard devel
7. libpmem : Install nvml or pmdk
8. slirp : qemu userspace networking backend disabled due to missing netinet headers in relibc

Currently undergoing testing:

1. removed env (setjmp.h dependency) - may be restored soon
2. modified the bios boot image (I'm not sure if it's exactly that). it had problems measuring the size of the image being created.

CONFIG_LINUX not replaced with CONFIG_REDOX since we're not sure:

1. qemu backend softmmu
2. u-boot scripts config whitelists
3. hmp_commands gpa2hpa
4. qemu fsdev softmmu
5. <the tests folder is excluded as it's deemed unnecessary at the moment>
6. qemu util util_ss
7. <none of the json files were checked: block-core, qom, sockets>

NOTE: --enable-tools, coroutine-pool needs to be verified i.e. exactly what it is doing.

NOTE: we use "WARN" the way we use "TODO" to indicate stuff within the repo.