Eric Lee / smarc-fsl-linux-kernel

29 Jul, 2008

1 commit

28 Mar, 2008

1 commit

11 Mar, 2008

1 commit

  • f14ae652b   lguest: fix __get_vm_area usage. ... Browse Code »

    Robert Bragg's 5dc331852848a38ca00a2817e5b98a1d0561b116 tightened
    (ie. fixed) the checking in __get_vm_area, and it broke lguest.

    lguest should pass the exact "end" it wants, not some random constant
    (it was possible previously that it would actually get an address
    different from SWITCHER_ADDR).

    Also, Fabio Checconi pointed out that we should make sure we're not
    hitting the fixmap area.

    Signed-off-by: Rusty Russell
    Cc: Robert Bragg

    Rusty Russell
     

30 Jan, 2008

8 commits

25 Oct, 2007

1 commit

23 Oct, 2007

7 commits

  • 2d37f94a2   generalize lgread_u32/lgwrite_u32. ... Browse Code »

    Jes complains that page table code still uses lgread_u32 even though
    it now uses general kernel pte types. The best thing to do is to
    generalize lgread_u32 and lgwrite_u32.

    This means we lose the efficiency of getuser(). We could potentially
    regain it if we used __copy_from_user instead of copy_from_user, but
    I'm not certain that our range check is equivalent to access_ok() on
    all platforms.

    Signed-off-by: Rusty Russell
    Acked-by: Jes Sorensen

    Rusty Russell
     
  • 15045275c   Remove old lguest I/O infrrasructure. ... Browse Code »

    This patch gets rid of the old lguest host I/O infrastructure and
    replaces it with a single hypercall "LHCALL_NOTIFY" which takes an
    address.

    The main change is the removal of io.c: that mainly did inter-guest
    I/O, which virtio doesn't yet support.

    Signed-off-by: Rusty Russell

    Rusty Russell
     
  • c18acd73f   Allow guest to specify syscall vector to use. ... Browse Code »

    (Based on Ron Minnich's LGUEST_PLAN9_SYSCALL patch).

    This patch allows Guests to specify what system call vector they want,
    and we try to reserve it. We only allow one non-Linux system call
    vector, to try to avoid DoS on the Host.

    Signed-off-by: Rusty Russell

    Rusty Russell
     
  • cc6d4fbce   Introduce "hcall" pointer to indicate pending hypercall. ... Browse Code »

    Currently we look at the "trapnum" to see if the Guest wants a
    hypercall. But once the hypercall is done we have to reset trapnum to
    a bogus value, otherwise if we exit to userspace and return, we'd run
    the same hypercall twice (that was a nasty bug to find!).

    This has two main effects:

    1) When Jes's patch changes the hypercall args to be a generic "struct
    hcall_args" we simply change the type of "lg->hcall". It's set by
    arch code, so if it has to copy args or something it can do so, and
    point "hcall" into lg->arch somewhere.

    2) Async hypercalls only get run when an actual hypercall is pending.
    This simplfies the code a little and is a more logical semantic.

    Signed-off-by: Rusty Russell

    Rusty Russell
     
  • 625efab1c   Move i386 part of core.c to x86/core.c. ... Browse Code »

    Separate i386 architecture specific from core.c and move it to
    x86/core.c and add x86/lguest.h header file to match.

    Signed-off-by: Jes Sorensen
    Signed-off-by: Rusty Russell

    Jes Sorensen
     
  • 48245cc07   Remove fixed limit on number of guests, and lguests array. ... Browse Code »

    Back when we had all the Guest state in the switcher, we had a fixed
    array of them. This is no longer necessary.

    If we switch the network code to using random_ether_addr (46 bits is
    enough to avoid clashes), we can get rid of the concept of "guest id"
    altogether.

    Signed-off-by: Rusty Russell

    Rusty Russell
     
  • 3c6b5bfa3   Introduce guest mem offset, static link example launcher ... Browse Code »

    In order to avoid problematic special linking of the Launcher, we give
    the Host an offset: this means we can use any memory region in the
    Launcher as Guest memory rather than insisting on mmap() at 0.

    The result is quite pleasing: a number of casts are replaced with
    simple additions.

    Signed-off-by: Rusty Russell

    Rusty Russell
     

17 Oct, 2007

1 commit

  • 93b1eab3d   paravirt: refactor struct paravirt_ops into smaller pv_*_ops ... Browse Code »

    This patch refactors the paravirt_ops structure into groups of
    functionally related ops:

    pv_info - random info, rather than function entrypoints
    pv_init_ops - functions used at boot time (some for module_init too)
    pv_misc_ops - lazy mode, which didn't fit well anywhere else
    pv_time_ops - time-related functions
    pv_cpu_ops - various privileged instruction ops
    pv_irq_ops - operations for managing interrupt state
    pv_apic_ops - APIC operations
    pv_mmu_ops - operations for managing pagetables

    There are several motivations for this:

    1. Some of these ops will be general to all x86, and some will be
    i386/x86-64 specific. This makes it easier to share common stuff
    while allowing separate implementations where needed.

    2. At the moment we must export all of paravirt_ops, but modules only
    need selected parts of it. This allows us to export on a case by case
    basis (and also choose which export license we want to apply).

    3. Functional groupings make things a bit more readable.

    Struct paravirt_ops is now only used as a template to generate
    patch-site identifiers, and to extract function pointers for inserting
    into jmp/calls when patching. It is only instantiated when needed.

    Signed-off-by: Jeremy Fitzhardinge
    Signed-off-by: Rusty Russell
    Cc: Andi Kleen
    Cc: Zach Amsden
    Cc: Avi Kivity
    Cc: Anthony Liguory
    Cc: "Glauber de Oliveira Costa"
    Cc: Jun Nakajima

    Jeremy Fitzhardinge
     

09 Aug, 2007

1 commit

  • 0d027c01c   lguest: Fix Malicious Guest GDT Host Crash ... Browse Code »

    If a Guest makes hypercall which sets a GDT entry to not present, we
    currently set any segment registers using that GDT entry to 0.
    Unfortunately, this is not sufficient: there are other ways of
    altering GDT entries which will cause a fault.

    The correct solution to do what Linux does: let them set any GDT value
    they want and handle the #GP when popping causes a fault. This has
    the added benefit of making our Switcher slightly more robust in the
    case of any other bugs which cause it to fault.

    We kill the Guest if it causes a fault in the Switcher: it's the
    Guest's responsibility to make sure it's not using segments when it
    changes them.

    Signed-off-by: Rusty Russell
    Signed-off-by: Linus Torvalds

    Rusty Russell
     

27 Jul, 2007

4 commits

20 Jul, 2007

1 commit

  • d7e28ffe6   lguest: the host code ... Browse Code »

    This is the code for the "lg.ko" module, which allows lguest guests to
    be launched.

    [akpm@linux-foundation.org: update for futex-new-private-futexes]
    [akpm@linux-foundation.org: build fix]
    [jmorris@namei.org: lguest: use hrtimers]
    [akpm@linux-foundation.org: x86_64 build fix]
    Signed-off-by: Rusty Russell
    Cc: Andi Kleen
    Cc: Eric Dumazet
    Cc: Thomas Gleixner
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Rusty Russell