On 07.12.2012, at 13:30, Cornelia Huck wrote:
> Explicitely catch all channel I/O related instructions intercepts
> in the kernel and set condition code 3 for them.
>
> This paves the way for properly handling these instructions later
> on.
>
> Note: This is not architecture compliant (the previous code wasn't
> either) since setting cc 3 is not the correct thing to do for some
> of these instructions. For Linux guests, however, it still has the
> intended effect of stopping css probing.
>
> Reviewed-by: Marcelo Tosatti <mtosatti@xxxxxxxxxx>
> Signed-off-by: Cornelia Huck <cornelia.huck@xxxxxxxxxx>
> ---
> arch/s390/kvm/intercept.c | 19 +++++++++++++---
> arch/s390/kvm/kvm-s390.h | 1 +
> arch/s390/kvm/priv.c | 56 +++++++++++++++++++++++++++++++++--------------
> 3 files changed, 56 insertions(+), 20 deletions(-)
>
> diff --git a/arch/s390/kvm/intercept.c b/arch/s390/kvm/intercept.c
> index ec1177f..754dc9e 100644
> --- a/arch/s390/kvm/intercept.c
> +++ b/arch/s390/kvm/intercept.c
> @@ -33,8 +33,6 @@ static int handle_lctlg(struct kvm_vcpu *vcpu)
> int reg, rc;
>
> vcpu->stat.instruction_lctlg++;
> - if ((vcpu->arch.sie_block->ipb & 0xff) != 0x2f)
> - return -EOPNOTSUPP;
>
> useraddr = disp2;
> if (base2)
> @@ -104,6 +102,21 @@ static int handle_lctl(struct kvm_vcpu *vcpu)
> return 0;
> }
>
> +static intercept_handler_t eb_handlers[256] = {
const.
Reviewed-by: Alexander Graf <agraf@xxxxxxx>
Alex
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