GSoC project: Memory protection (Ticket no: 2904)

[Rajiv Vaidyanathan]

Dear Hesham,

Thank you for providing information about the RISC-V MMU. I want to know
what work has to be done in improving MMU in RISC-V and if it can be a GSoC
project. It would be great if you could provide the details regarding this.

Thanks and regards,
Rajiv

On Wed, 24 Mar 2021 at 00:03, Hesham Almatary <hesham.almatary at cl.cam.ac.uk>
wrote:

> On Tue, 23 Mar 2021 at 17:14, Gedare Bloom <gedare at rtems.org> wrote:
> >
> > CC: Hesham
> > CC: devel
> >
> > On Tue, Mar 23, 2021 at 6:34 AM Rajiv Vaidyanathan
> > <rajiv.vaidyanathan4 at gmail.com> wrote:
> > >
> > > Dear Gedare,
> > >
> > > Thank you for providing information regarding the project. For risk-v
> MMU support, will I require to have hardware?
> > >
> > That's a good question. I don't know if the current risc-v simulators
> > support the risc-v mmu. maybe, another expert could advise. I have
> > CC'd someone with experience in both risc-v and memory protection.
> >
> Yes, both Spike and QEMU have MMU and PMP support.
>
> > Let's keep technical discussions on the mailing list. Thanks.
> >
> > > Thanks and regards,
> > > Rajiv
> > >
> > > On Mon, 22 Mar 2021 at 21:54, Gedare Bloom <gedare at rtems.org> wrote:
> > >>
> > >> Hi Rajiv,
> > >>
> > >> On Sat, Mar 20, 2021 at 12:40 AM Rajiv Vaidyanathan
> > >> <rajiv.vaidyanathan4 at gmail.com> wrote:
> > >> >
> > >> > Hello RTEMS community,
> > >> >
> > >> > I am interested in the ticket: Memory protection. I saw that this
> topic has been pursued a few times in GSoC. It would be great if someone
> can let me know the current status of this project and guide me about what
> are the contributions that can be done this year.
> > >> >
> > >> Yes, this is a frequently attempted project that slowly makes progress
> > >> over time. I think that Utkarsh has gotten somewhat close to a
> > >> workable solution, but there were some design flaws in his approach
> > >> for task stack protection (mainly, iterating over all the tasks) that
> > >> are still lingering.
> > >>
> > >> There could be enough work here to pick up from his progress. The
> > >> major issue would be figuring out what  the final state of his code is
> > >> in, and to dig in to the design and implementation details to write a
> > >> concrete proposal how to bring task stack protection to a production
> > >> state. There may be other directions to consider as well, such as
> > >> improving the risc-v MMU support perhaps.
> > >>
> > >> > Thanks and regards,
> > >> > Rajiv
> > >> > _______________________________________________
> > >> > devel mailing list
> > >> > devel at rtems.org
> > >> > http://lists.rtems.org/mailman/listinfo/devel
> > _______________________________________________
> > devel mailing list
> > devel at rtems.org
> > http://lists.rtems.org/mailman/listinfo/devel
>
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