Add onboarding resources to mdbook

This is converted from our onboarding doc with internal references
removed.

BUG=b:199926026
TEST=None

Change-Id: Ibb94e194583b12c1ec7fe3d80306156e34e50000
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/3229948
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Keiichi Watanabe <keiichiw@chromium.org>
Reviewed-by: Daniel Verkamp <dverkamp@chromium.org>
Commit-Queue: Dennis Kempin <denniskempin@google.com>

docs/book/src/SUMMARY.md

@@ -14,7 +14,7 @@
 
 --------------------------------------------------------------------------------
 
-
+-   [Onboarding Resources](./onboarding.md)
 -   [Appendix](./appendix/index.md)
     -   [Example Usage (Outdated)](./appendix/example_usage.md)
     -   [Sandboxing](./appendix/sandboxing.md)

docs/book/src/onboarding.md

@@ -0,0 +1,93 @@
+# Onboarding Resources
+
+Various links to useful resources for learning about virtual machines and the
+technology behind crosvm.
+
+## Talks
+
+### [Chrome University](https://www.youtube.com/watch?v=2Pc71zYWFDM) by zachr (2018, 30m)
+
+-   Life of a Crostini VM (user click -> terminal opens)
+-   All those French daemons (Concierge, Maitred, Garcon, Sommelier)
+
+### [NYULG: Crostini](https://www.youtube.com/watch?v=WwrXqDERFm8) by zachr / reveman (2018, 50m)
+
+-   Overlaps Chrome University talk
+-   More details on wayland / sommelier from reveman
+-   More details on crostini integration of app icons, files, clipboard
+-   Lots of demos
+
+## Introductory Resources
+
+### OS Basics
+
+-   [OSDev Wiki](https://wiki.osdev.org/Main_Page) (A lot of articles on OS
+    development)
+-   [PCI Enumeration](https://www.khoury.northeastern.edu/~pjd/cs7680/homework/pci-enumeration.html)
+    (Most of our devices are on PCI, this is how they are found)
+-   [ACPI Source Language Tutorial](https://acpica.org/sites/acpica/files/asl_tutorial_v20190625.pdf)
+
+### Rust
+
+-   [Rust Cheat Sheet](https://cheats.rs/) Beautiful website with idiomatic rust
+    examples, overview of pointer- and container types
+-   [Rust Programming Tipz](https://github.com/ferrous-systems/elements-of-rust)
+    (with a z, that’s how you know it’s cool!)
+-   Rust [design patterns](https://github.com/rust-unofficial/patterns) repo
+-   Organized
+    [collection](https://github.com/brson/rust-anthology/blob/master/master-list.md)
+    of blog posts on various Rust topics
+
+### KVM Virtualization
+
+-   [Low-level tutorial](https://lwn.net/Articles/658511/) on how to run code
+    via KVM
+-   [KVM Hello World](https://github.com/dpw/kvm-hello-world) sample program
+    (host + guest)
+-   [KVM API docs](https://www.kernel.org/doc/html/latest/virt/kvm/api.html)
+-   [Awesome Virtualization](https://github.com/Wenzel/awesome-virtualization)
+    (Definitely check out the Hypervisor Development section)
+
+### Virtio (device emulation)
+
+-   [Good overview](https://developer.ibm.com/technologies/linux/articles/l-virtio/)
+    of virtio architecture from IBM
+-   [Virtio drivers](https://www.redhat.com/en/blog/virtio-devices-and-drivers-overview-headjack-and-phone)
+    overview by RedHat
+-   [Virtio specs](https://docs.oasis-open.org/virtio/virtio/v1.1/csprd01/virtio-v1.1-csprd01.html)
+    (so exciting, I can’t stop reading)
+-   [Basics of devices in QEMU ](https://www.qemu.org/2018/02/09/understanding-qemu-devices/)
+
+### VFIO (Device passthrough)
+
+-   [Introduction to PCI Device Assignment with VFIO](https://www.youtube.com/watch?v=WFkdTFTOTpA)
+
+### Virtualization History and Basics
+
+-   By the end of this section you should be able to answer the following
+    questions
+    -   What problems do VMs solve?
+    -   What is trap-and-emulate?
+    -   Why was the x86 instruction set not “virtualizable” with just
+        trap-and-emulate?
+    -   What is binary translation? Why is it required?
+    -   What is a hypervisor? What is a VMM? What is the difference? (If any)
+    -   What problem does paravirtualization solve?
+    -   What is the virtualization model we use with Crostini?
+    -   What is our hypervisor?
+    -   What is our VMM?
+-   [CMU slides](http://www.cs.cmu.edu/~410-f06/lectures/L31_Virtualization.pdf)
+    go over motivation, why x86 instruction set wasn’t “virtualizable” and the
+    good old trap-and-emulate
+-   Why Intel VMX was needed; what does it do
+    ([Link](https://lettieri.iet.unipi.it/virtualization/2018/hardware-assisted-intel-vmx.pdf))
+-   What is a VMM and what does it do
+    ([Link](http://pages.cs.wisc.edu/~remzi/OSTEP/vmm-intro.pdf))
+-   Building a super simple VMM blog article
+    ([Link](https://unixism.net/2019/10/sparkler-kvm-based-virtual-machine-manager/))
+
+## Relevant Specs
+
+- [ACPI Specs](https://uefi.org/acpi/specs)
+- [DeviceTree Specs](https://www.devicetree.org/specifications/)
+- [Vhost-user protocol](https://qemu-project.gitlab.io/qemu/interop/vhost-user.html)