linux-toradex.git/drivers/lguest/core.c, branch v3.10

lguest: map Switcher below fixmap.

2013-04-22T06:15:03+00:00

Now we've adjusted all the code, we can simply set switcher_addr to
wherever it needs to go below the fixmaps, rather than asserting that
it should be so.

With large NR_CPUS and PAE, people were hitting the "mapping switcher
would thwack fixmap" message.

Reported-by: Paul Bolle 
Signed-off-by: Rusty Russell

lguest: don't share Switcher PTE pages between guests.

2013-04-22T06:15:01+00:00

We currently use the whole top PGD entry for the switcher, so we
simply share a fixed page of PTEs between all guests (actually, it's
one per Host CPU, to ensure isolation between guests).

Changes to a scheme where every guest has its own mappings.

Signed-off-by: Rusty Russell

lguest: expost switcher_pages array (as lg_switcher_pages).

2013-04-22T06:15:00+00:00

We will need this in page_table.c soon.

Signed-off-by: Rusty Russell

lguest: assume Switcher text is a single page.

2013-04-22T06:01:36+00:00

ie. SHARED_SWITCHER_PAGES == 1.  It is well under a page, and it's a
minor simplification: it's nice to have *one* simplification in a
patch series!

Signed-off-by: Rusty Russell

lguest: rename switcher_page to switcher_pages.

2013-04-22T06:01:35+00:00

There is a single page with the Switcher in it, but it's followed by 2
pages per Host CPU.

Signed-off-by: Rusty Russell

lguest: prepare to make SWITCHER_ADDR a variable.

2013-04-22T06:01:33+00:00

We currently use the whole top PGD entry for the switcher, but that's
hitting the fixmap in some configurations (mainly, large NR_CPUS).
Introduce a variable, currently set to the constant.

Signed-off-by: Rusty Russell

lguest: fix typo

2012-12-18T04:49:06+00:00

Signed-off-by: Alex Russell 
Signed-off-by: Rusty Russell

lguest: move process freezing before pending signals check

2011-10-27T00:26:18+00:00

run_guest tries to freeze the current process after it has handled
pending interrupts and before it calls lguest_arch_run_guest.
This doesn't work nicely if the task has been killed while being frozen
and when we want to handle that signal as soon as possible.
Let's move try_to_freeze before we check for pending signal so that we
can get out of the loop as soon as possible.

Signed-off-by: Michal Hocko 
Acked-by: Rusty Russell 
Signed-off-by: Rusty Russell

lguest: Allow running under paravirt-enabled KVM.

2011-10-27T00:26:17+00:00

We actually can run under KVM, as it doesn't paravirtualize anything we
need to use; reduce the check to checking we are the normal ringlevel.

Reported-by: Stefanos Geraggelos 
Signed-off-by: Rusty Russell # HG changeset patch

lguest: update comments

2011-07-22T05:09:50+00:00

Also removes a long-unused #define and an extraneous semicolon.

Signed-off-by: Rusty Russell