linux-toradex.git/include/linux/lguest_launcher.h, branch v3.3.5

lguest: fix comment style

2009-07-30T06:33:45+00:00

I don't really notice it (except to begrudge the extra vertical
space), but Ingo does.  And he pointed out that one excuse of lguest
is as a teaching tool, it should set a good example.

Signed-off-by: Rusty Russell 
Cc: Ingo Molnar

lguest: remove obsolete LHREQ_BREAK call

2009-06-12T12:57:11+00:00

We no longer need an efficient mechanism to force the Guest back into
host userspace, as each device is serviced without bothering the main
Guest process (aka. the Launcher).

Signed-off-by: Rusty Russell

lguest: use eventfds for device notification

2009-06-12T12:57:10+00:00

Currently, when a Guest wants to perform I/O it calls LHCALL_NOTIFY with
an address: the main Launcher process returns with this address, and figures
out what device to run.

A far nicer model is to let processes bind an eventfd to an address: if we
find one, we simply signal the eventfd.

Signed-off-by: Rusty Russell 
Cc: Davide Libenzi

lguest: move the initial guest page table creation code to the host

2008-12-29T22:56:11+00:00

This patch moves the initial guest page table creation code to the host,
so the launcher keeps working with PAE enabled configs.

Signed-off-by: Matias Zabaljauregui 
Signed-off-by: Rusty Russell

virtio: use LGUEST_VRING_ALIGN instead of relying on pagesize

2008-12-29T22:56:02+00:00

This doesn't really matter, since lguest is i386 only at the moment,
but we could actually choose a different value.  (lguest doesn't have
a guarenteed ABI).

Signed-off-by: Rusty Russell

lguest: comment documentation update.

2008-03-28T00:05:54+00:00

Took some cycles to re-read the Lguest Journey end-to-end, fix some
rot and tighten some phrases.

Only comments change.  No new jokes, but a couple of recycled old jokes.

Signed-off-by: Rusty Russell

virtio: simplify config mechanism.

2008-02-04T12:49:57+00:00

Previously we used a type/len pair within the config space, but this
seems overkill.  We now simply define a structure which represents the
layout in the config space: the config space can now only be extended
at the end.

The main driver-visible changes:
1) We indicate what fields are present with an explicit feature bit.
2) Virtqueues are explicitly numbered, and not in the config space.

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

lguest: clean up lguest_launcher.h

2007-10-25T04:12:20+00:00

Remove now-unused defines.
Fix old idempotent #ifndef _ASM_LGUEST_USER name.
Fix comment on use of lguest_req.

Signed-off-by: Rusty Russell

Lguest support for Virtio

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

This makes lguest able to use the virtio devices.

We change the device descriptor page from a simple array to a variable
length "type, config_len, status, config data..." format, and
implement virtio_config_ops to read from that config data.

We use the virtio ring implementation for an efficient Guest <-> Host
virtqueue mechanism, and the new LHCALL_NOTIFY hypercall to kick the
host when it changes.

We also use LHCALL_NOTIFY on kernel addresses for very very early
console output.  We could have another hypercall, but this hack works
quite well.

Signed-off-by: Rusty Russell