linux-toradex.git/drivers/lguest/segments.c, branch v2.6.28.10

lguest: get rid of lg variable assignments

2008-01-30T11:50:18+00:00

We can save some lines of code by getting rid of
*lg = cpu... lines of code spread everywhere by now.

Signed-off-by: Glauber de Oliveira Costa 
Signed-off-by: Rusty Russell

lguest: move changed bitmap to lg_cpu

2008-01-30T11:50:17+00:00

events represented in the 'changed' bitmap are per-cpu, not per-guest.
move it to the lg_cpu structure

Signed-off-by: Glauber de Oliveira Costa 
Signed-off-by: Rusty Russell

lguest: replace lguest_arch with lg_cpu_arch.

2008-01-30T11:50:11+00:00

The fields found in lguest_arch are not really per-guest,
but per-cpu (gdt, idt, etc). So this patch turns lguest_arch
into lg_cpu_arch.

It makes sense to have a per-guest per-arch struct, but this
can be addressed later, when the need arrives.

Signed-off-by: Glauber de Oliveira Costa 
Signed-off-by: Rusty Russell

lguest: documentation update

2007-10-25T05:02:50+00:00

Went through the documentation doing typo and content fixes.  This
patch contains only comment and whitespace changes.

Signed-off-by: Rusty Russell

generalize lgread_u32/lgwrite_u32.

2007-10-23T05:49:56+00:00

Jes complains that page table code still uses lgread_u32 even though
it now uses general kernel pte types.  The best thing to do is to
generalize lgread_u32 and lgwrite_u32.

This means we lose the efficiency of getuser().  We could potentially
regain it if we used __copy_from_user instead of copy_from_user, but
I'm not certain that our range check is equivalent to access_ok() on
all platforms.

Signed-off-by: Rusty Russell 
Acked-by: Jes Sorensen

Move i386 part of core.c to x86/core.c.

2007-10-23T05:49:51+00:00

Separate i386 architecture specific from core.c and move it to
x86/core.c and add x86/lguest.h header file to match.

Signed-off-by: Jes Sorensen 
Signed-off-by: Rusty Russell

lguest: Fix Malicious Guest GDT Host Crash

2007-08-09T15:14:56+00:00

If a Guest makes hypercall which sets a GDT entry to not present, we
currently set any segment registers using that GDT entry to 0.
Unfortunately, this is not sufficient: there are other ways of
altering GDT entries which will cause a fault.

The correct solution to do what Linux does: let them set any GDT value
they want and handle the #GP when popping causes a fault.  This has
the added benefit of making our Switcher slightly more robust in the
case of any other bugs which cause it to fault.

We kill the Guest if it causes a fault in the Switcher: it's the
Guest's responsibility to make sure it's not using segments when it
changes them.

Signed-off-by: Rusty Russell 
Signed-off-by: Linus Torvalds

lguest: documentation VII: FIXMEs

2007-07-26T18:35:17+00:00

Documentation: The FIXMEs

Signed-off-by: Rusty Russell 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

lguest: documentation V: Host

2007-07-26T18:35:17+00:00

Documentation: The Host

Signed-off-by: Rusty Russell 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

lguest: documentation I: Preparation

2007-07-26T18:35:16+00:00

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 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds