Hey Martin,
I would like to explain my situation better. Here is what I intend:
a. What is the lowest module (bootstrap, fiasco, sigma, moe, ned,l4linux) that can be confined not access a portion of the address space? I know that bootstrap and fiasco run in privileged mode, so there is no way to stop them. What is the next module?
b. Assuming that it is sigma, I would like to do the following: Have three regions in the physical address space (not necessarily memory):
i) one for bootstrap, fiasco ii) moe, ned, sigma, l4linux iii). Special region accessible only from (i) - bootstrap and fiasco.
If it is not possible to confine sigma, i.e., "hide a portion of the address space from it", then add sigma to lists (i,iii) and remove it from (ii) - and so on for the other modules.
If it is moe, could my goal be reached by adding an IO device as a blocker but then not give moe the corresponding capability?
Sorry for the confusion and thanks a lot for your help, Ramya ________________________________________ From: l4-hackers [l4-hackers-bounces@os.inf.tu-dresden.de] on behalf of Masti Ramya Jayaram [rmasti@inf.ethz.ch] Sent: 09 September 2014 13:18 To: Martin Schröder; l4-hackers@os.inf.tu-dresden.de Subject: RE: Physical memory allocation to L4linux
Hey Martin,
thanks for that tip. How do I use this device for L4linux though (and only for it)? I am not sure where memory allocation occurs when L4linux faults or if it is pre-allocated completely to L4linux.
Best, ramya ________________________________________ From: l4-hackers [l4-hackers-bounces@os.inf.tu-dresden.de] on behalf of Martin Schröder [martin.schroeder@openlimit.com] Sent: 09 September 2014 11:56 To: l4-hackers@os.inf.tu-dresden.de Subject: Re: Physical memory allocation to L4linux
Hi Ramya,
Am 09.09.2014 um 11:39 schrieb Masti Ramya Jayaram:
Hi all,
I start l4linux by specifying 64M on memory in its configuration file. I would like this memory to be a fixed range of physical memory and I was wondering if there is a way to do it.
MYRAM => new Device() { .hid= "myram"; new-res Mmio(0x10000000 .. 0x13FFFFFF, 0xC000); }
[http://os.inf.tu-dresden.de/pipermail/l4-hackers/2014/006617.html]
Best regards, Martin.
_______________________________________________ l4-hackers mailing list l4-hackers@os.inf.tu-dresden.de http://os.inf.tu-dresden.de/mailman/listinfo/l4-hackers
_______________________________________________ l4-hackers mailing list l4-hackers@os.inf.tu-dresden.de http://os.inf.tu-dresden.de/mailman/listinfo/l4-hackers