Re: [Qemu-devel] [RFC PATCH v3 0/5] s390: Host support for channel I/O.

[Marcelo Tosatti <mtosatti@redhat.com>]

On Wed, Oct 31, 2012 at 05:24:33PM +0100, Cornelia Huck wrote:
> Hi,
> 
> here's the latest incarnation of my host patches to support channel
> I/O on s390.
> 
> Most patches have only seen minor fixes, but patch 5 is completely
> different since the kvm <-> user space interface has been reworked.
> 
> We now handle only interrupt-related operations in kvm. This
> includes two channel I/O instructions that can dequeue pending I/O
> interrupts: tpi and tsch (not the part actually interacting with
> the subchannel). This makes the interface less complex (only one
> new exit for tsch handling) and avoids duplicating code from qemu.
> 
> Cornelia Huck (5):
>   KVM: s390: Support for I/O interrupts.
>   KVM: s390: Add support for machine checks.
>   KVM: s390: In-kernel handling of I/O instructions.
>   KVM: s390: Base infrastructure for enabling capabilities.
>   KVM: s390: Add support for channel I/O instructions.
> 
>  Documentation/virtual/kvm/api.txt |  40 +++++-
>  arch/s390/include/asm/kvm_host.h  |  11 ++
>  arch/s390/kvm/intercept.c         |  22 ++-
>  arch/s390/kvm/interrupt.c         | 264 +++++++++++++++++++++++++++++++++++-
>  arch/s390/kvm/kvm-s390.c          |  38 ++++++
>  arch/s390/kvm/kvm-s390.h          |   6 +
>  arch/s390/kvm/priv.c              | 275 +++++++++++++++++++++++++++++++++++---
>  arch/s390/kvm/trace-s390.h        |  26 +++-
>  include/linux/kvm.h               |  18 +++
>  include/trace/events/kvm.h        |   2 +-
>  10 files changed, 673 insertions(+), 29 deletions(-)
> 
> -- 
> 1.7.12.4

Reviewed-by: Marcelo Tosatti <mtosatti@redhat.com>