linux/drivers/lguest
Linus Torvalds b9bb6fb73b Some virtio internal cleanups, a new virtio device "virtio input", and
a change to allow the legacy virtio balloon.
 
 Most excitingly, some lguest work!  No seriously, I got some cleanup
 patches.
 
 Cheers,
 Rusty.
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Merge tag 'virtio-next-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux

Pull virtio updates from Rusty Russell:
 "Some virtio internal cleanups, a new virtio device "virtio input", and
  a change to allow the legacy virtio balloon.

  Most excitingly, some lguest work! No seriously, I got some cleanup
  patches"

* tag 'virtio-next-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux:
  virtio: drop virtio_device_is_legacy_only
  virtio_pci: support non-legacy balloon devices
  virtio_mmio: support non-legacy balloon devices
  virtio_ccw: support non-legacy balloon devices
  virtio: balloon might not be a legacy device
  virtio_balloon: transitional interface
  virtio_ring: Update weak barriers to use dma_wmb/rmb
  virtio_pci_modern: switch to type-safe io accessors
  virtio_pci_modern: type-safe io accessors
  lguest: handle traps on the "interrupt suppressed" iret instruction.
  virtio: drop a useless config read
  virtio_config: reorder functions
  Add virtio-input driver.
  lguest: suppress interrupts for single insn, not range.
  lguest: simplify lguest_iret
  lguest: rename i386_head.S in the comments
  lguest: explicitly set miscdevice's private_data NULL
  lguest: fix pending interrupt test.
2015-04-22 10:55:06 -07:00
..
x86 OK, this has the big virtio 1.0 implementation, as specified by OASIS. 2015-02-18 09:24:01 -08:00
core.c lguest: remove NOTIFY call and eventfd facility. 2015-02-11 16:47:46 +10:30
hypercalls.c lguest: suppress interrupts for single insn, not range. 2015-03-24 11:52:08 +10:30
interrupts_and_traps.c lguest: handle traps on the "interrupt suppressed" iret instruction. 2015-04-01 14:37:15 +10:30
Kconfig lguest: now needs PCI_DIRECT. 2015-04-01 10:29:05 -07:00
lg.h lguest: suppress interrupts for single insn, not range. 2015-03-24 11:52:08 +10:30
lguest_user.c lguest: explicitly set miscdevice's private_data NULL 2015-03-24 11:52:06 +10:30
Makefile lguest: remove support for lguest bus. 2015-02-11 16:47:41 +10:30
page_tables.c lguest: add iomem region, where guest page faults get sent to userspace. 2015-02-11 16:47:33 +10:30
README lguest: documentation I: Preparation 2007-07-26 11:35:16 -07:00
segments.c lguest: switch segment-voodoo-numbers to readable symbols 2012-01-12 15:44:47 +10:30

Welcome, friend reader, to lguest.

Lguest is an adventure, with you, the reader, as Hero.  I can't think of many
5000-line projects which offer both such capability and glimpses of future
potential; it is an exciting time to be delving into the source!

But be warned; this is an arduous journey of several hours or more!  And as we
know, all true Heroes are driven by a Noble Goal.  Thus I offer a Beer (or
equivalent) to anyone I meet who has completed this documentation.

So get comfortable and keep your wits about you (both quick and humorous).
Along your way to the Noble Goal, you will also gain masterly insight into
lguest, and hypervisors and x86 virtualization in general.

Our Quest is in seven parts: (best read with C highlighting turned on)

I) Preparation
	- In which our potential hero is flown quickly over the landscape for a
	  taste of its scope.  Suitable for the armchair coders and other such
	  persons of faint constitution.

II) Guest
	- Where we encounter the first tantalising wisps of code, and come to
	  understand the details of the life of a Guest kernel.

III) Drivers
	- Whereby the Guest finds its voice and become useful, and our
	  understanding of the Guest is completed.

IV) Launcher
	- Where we trace back to the creation of the Guest, and thus begin our
	  understanding of the Host.

V) Host
	- Where we master the Host code, through a long and tortuous journey.
	  Indeed, it is here that our hero is tested in the Bit of Despair.

VI) Switcher
	- Where our understanding of the intertwined nature of Guests and Hosts
	  is completed.

VII) Mastery
	- Where our fully fledged hero grapples with the Great Question:
	  "What next?"

make Preparation!
Rusty Russell.