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1. Correct locking for lazy storage key handling

Browse source 
A test loop with multiple CPUs triggered a race in the lazy storage
    key handling as introduced by commit 934bc131ef
    (KVM: s390: Allow skeys to be enabled for the current process). This
    race should not happen with Linux guests, but let's fix it anyway.
    Patch touches !/kvm/ code, but is from the s390 maintainer.
 
 2. Better handling of broken guests
    If we detect a program check loop we stop the guest instead of
    wasting CPU cycles.
 
 3. Better handling on MVPG emulation
    The move page handling is improved to be architecturally correct.
 
 3. Trace point rework
    Let's rework the kvm trace points to have a common header file (for
    later perf usage) and provided a table based instruction decoder.
 
 4. Interpretive execution of SIGP external call
    Let the hardware handle most cases of SIGP external call (IPI) and
    wire up the fixup code for the corner cases.
 
 5. Initial preparations for the IBC facility
    Prepare the code to handle instruction blocking
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Merge tag 'kvm-s390-20140516' of git://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux into kvm-next

1. Correct locking for lazy storage key handling
   A test loop with multiple CPUs triggered a race in the lazy storage
   key handling as introduced by commit 934bc131ef
   (KVM: s390: Allow skeys to be enabled for the current process). This
   race should not happen with Linux guests, but let's fix it anyway.
   Patch touches !/kvm/ code, but is from the s390 maintainer.

2. Better handling of broken guests
   If we detect a program check loop we stop the guest instead of
   wasting CPU cycles.

3. Better handling on MVPG emulation
   The move page handling is improved to be architecturally correct.

3. Trace point rework
   Let's rework the kvm trace points to have a common header file (for
   later perf usage) and provided a table based instruction decoder.

4. Interpretive execution of SIGP external call
   Let the hardware handle most cases of SIGP external call (IPI) and
   wire up the fixup code for the corner cases.

5. Initial preparations for the IBC facility
   Prepare the code to handle instruction blocking
This commit is contained in:
Paolo Bonzini 2014-05-16 23:02:40 +02:00
commit afa538f0a1
14 changed files with 431 additions and 95 deletions
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