kernel_optimize_test/drivers/lguest
Rusty Russell f14ae652ba lguest: fix __get_vm_area usage.
Robert Bragg's 5dc3318528 tightened
(ie. fixed) the checking in __get_vm_area, and it broke lguest.

lguest should pass the exact "end" it wants, not some random constant
(it was possible previously that it would actually get an address
different from SWITCHER_ADDR).

Also, Fabio Checconi pointed out that we should make sure we're not
hitting the fixmap area.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Cc: Robert Bragg <robert@sixbynine.org>
2008-03-11 09:35:56 +11:00
..
x86 lguest: fix mis-merge against hpa's TSS renaming 2008-01-31 19:59:44 +11:00
core.c lguest: fix __get_vm_area usage. 2008-03-11 09:35:56 +11:00
hypercalls.c lguest: Use explicit includes rateher than indirect 2008-01-30 22:50:19 +11:00
interrupts_and_traps.c lguest: get rid of lg variable assignments 2008-01-30 22:50:18 +11:00
Kconfig Remove bogus duplicate CONFIG_LGUEST_GUEST entry. 2008-01-19 21:29:39 -08:00
lg.h lguest: Use explicit includes rateher than indirect 2008-01-30 22:50:19 +11:00
lguest_device.c Fix container_of() usage 2008-02-08 09:22:32 -08:00
lguest_user.c lguest: make sure cpu is initialized before accessing it 2008-03-11 09:35:56 +11:00
Makefile
page_tables.c lguest: accept guest _PAGE_PWT page table entries 2008-02-09 23:24:09 +01:00
README
segments.c lguest: get rid of lg variable assignments 2008-01-30 22:50:18 +11:00

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.