Adam Lackorzynski wrote:
On Thu Jan 11, 2007 at 22:25:56 +0100, Daniel Vandersee wrote:
is it possible to allow I/O page mapping at the RMGR for a newly created task (using l4_task_new) as it were possible using the "allow_cli" flag in the roottask configuration? Usually the pager of the newly created task would handle its I/O pagefaults. Unfortunately this won't work here as this particular task (L4 loader) tries to directly map I/O pages using an IPC call to the ressource manager. So the question is: How can I tell the ressource manager to allow I/O mapping for this particular task?
The loader can be configured to allow only specific ports for specific applications. roottask just gives them out, so it already does this?!
Yes, of course, but it seems that the loader is not allowed to map an I/O page (task #d2 is the L4 loader):
ROOT: Task #d2 is not allowed to execute cli/sti D2.03:loader | linux_drivers,#10: Can't map I/O space, ROOT denies page (result=0000 D2.03:loader : 4000)
IMO this is because the loader was not started with the "allow_cli" flag turned on. The loader was started by another server (using l4_task_new) - not by the roottask.
Daniel