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lguest: documentation I: Preparation

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The netfilter code had very good documentation: the Netfilter Hacking HOWTO.
Noone ever read it.

So this time I'm trying something different, using a bit of Knuthiness.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Rusty Russell
2007-07-26 10:41:02 -07:00
committed by Linus Torvalds
parent dfb68689bf
commit f938d2c892
14 changed files with 218 additions and 19 deletions
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13
drivers/lguest/switcher.S
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@@ -1,10 +1,11 @@
/* This code sits at 0xFFC00000 to do the low-level guest<->host switch.
/*P:900 This is the Switcher: code which sits at 0xFFC00000 to do the low-level
* Guest<->Host switch. It is as simple as it can be made, but it's naturally
* very specific to x86.
*
* You have now completed Preparation. If this has whet your appetite; if you
* are feeling invigorated and refreshed then the next, more challenging stage
* can be found in "make Guest". :*/
There is are two pages above us for this CPU (struct lguest_pages).
The second page (struct lguest_ro_state) becomes read-only after the
context switch. The first page (the stack for traps) remains writable,
but while we're in here, the guest cannot be running.
*/
#include <linux/linkage.h>
#include <asm/asm-offsets.h>
#include "lg.h"