1. 25 Oct, 2016 5 commits
    • Charlie Jacobsen's avatar
      Except IPC, kliblcd fully tested. Everything is working. · 664628a4
      Charlie Jacobsen authored
      Documentation in Documentation/lcd-domains/...
      
      Loading, mapping, and running a module is working correctly, using
      all of the capability code that interposes on each operation (mapping,
      freeing pages, etc.).
      
      cptr allocation and indexing into cspaces is working correctly.
      
      IPC testing and debugging is coming next.
      664628a4
    • Charlie Jacobsen's avatar
      Muktesh's capabilities fully incorporated. Capsicum-style enter/exit. · 6ee9a51f
      Charlie Jacobsen authored
      Builds, but not fully tested. Good tests for capability subsystem, some tests
      for kliblcd.
      
      Non-isolated kernel threads can "enter" the lcd system by doing
      klcd_enter / klcd_exit. They can create other lcd's, set them up, etc. They
      use the same interface that regular lcd's will use, so such code could be
      moved to an lcd, as we had planned. Will document this in Documentation folder
      tomorrow ( == today ).
      
      Capability system does checks now when a capability is deleted/revoked: for
      example, if it's for a page, the microkernel checks if the page is mapped, and
      unmaps it. If the last capability goes away, the page is freed. Documentation
      is in Documentation/lcd-domains/cap.txt.
      
      IPC code is in place, but not tested yet (pray for me).
      
      Debug is taking some time. Sometimes requires a power cycle which adds an
      extra 5 - 10 minutes. Build is slow the first time after reboot. Give me a user
      level program and I'll debug it in 30 seconds! argc
      
      Main arch-independent files:
      
          include/lcd-domains/kliblcd.h, types.h
      
             This is what non-isolated kernel code should include to use the
             kliblcd interface to the microkernel.
      
          virt/lcd-domains/main.c, kliblcd.c, cap.c, ipc.c, internal.h
      
             The microkernel, broken up into pieces.
      
          virt/lcd-domains/tests/
      
             The tests, in progress.
      
      Some old files are still hanging around in virt/lcd-domains and will be
      incorprated/cleaned up soon.
      
      I couldn't squash over the merge from the decomposition branch, so there's a
      bunch of junk commits coming over. (I should've just copied Muktesh's files.)
      
      Conflicts:
      	drivers/Kconfig
      	drivers/lcd-cspace/test.h
      	include/lcd-domains/cap.h
      	include/lcd-prototype/lcd.h
      	include/lcd/console.h
      	include/lcd/elfnote.h
      	include/linux/init_task.h
      	include/linux/module.h
      	include/linux/sched.h
      	virt/lcd-domains/cap.c
      	virt/lcd-domains/ipc.c
      	virt/lcd-domains/lcd-cspace-tests2.c
      Resolved-by: Vikram Narayanan's avatarVikram Narayanan <vikram186@gmail.com>
      6ee9a51f
    • Charles Jacobsen's avatar
      Support for multiple threads in lcd (limited). Major clean up of code. · ded1cd32
      Charles Jacobsen authored
      In line with more recent design discussions, we now have (limited)
      support for running multiple threads inside an lcd.
      
      Each thread will have its own hardware vm, but share a guest
      physical address space and cspace.
      
      It's limited for now because threads cannot handle interrupts/exceptions
      internally in the lcd. This will require a per-thread TSS (much like
      Linux's per-core TSS/interrupt stack). I removed the gdt/idt/tss for
      now (Cf. with Dune, they don't use gdt/idt/tss) and will tackle that later
      after finishing more important stuff.
      
      I have only tested the code for running one hardware vm inside an lcd. Some
      code is missing proper locking for the future when we have multiple threads
      inside an lcd. I'm leaving this for now.
      
      The microkernel uses a simple bitmap for guest physical page allocation.
      
      Removed blob loading - code is set up for running modules exclusively.
      
      See the headers and Documentation/lcd-domains for more info.
      
      I put a flag at the top of files that are not currently in use, and will
      probably be deleted/incorporated later.
      ded1cd32
    • Charlie Jacobsen's avatar
      Simple ipc documentation. · 22f4bcd9
      Charlie Jacobsen authored
      22f4bcd9
    • Charlie Jacobsen's avatar
      Separated lcd into container and thread objects. · dbc4e40c
      Charlie Jacobsen authored
      Updated code. Removed gdt/tss/idt for now. Added doc directory
      and some initial doc.
      dbc4e40c