Re: [PATCH v4 14/36] KVM: s390: protvirt: Implement interrupt injection

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On Mon, 24 Feb 2020 06:40:45 -0500
Christian Borntraeger <borntraeger@xxxxxxxxxx> wrote:

> From: Michael Mueller <mimu@xxxxxxxxxxxxx>
> 
> This defines the necessary data structures in the SIE control block to
> inject machine checks,external and I/O interrupts. We first define the
> the interrupt injection control, which defines the next interrupt to
> inject. Then we define the fields that contain the payload for machine
> checks,external and I/O interrupts.
> This is then used to implement interruption injection for the following
> list of interruption types:
> 
>    - I/O (uses inject io interruption)
>      __deliver_io
> 
>    - External (uses inject external interruption)
>      __deliver_cpu_timer
>      __deliver_ckc
>      __deliver_emergency_signal
>      __deliver_external_call
> 
>    - cpu restart (uses inject restart interruption)
>      __deliver_restart
> 
>    - machine checks (uses mcic, failing address and external damage)
>      __write_machine_check
> 
> Please note that posted interrupts (GISA) are not used for protected
> guests as of today.
> 
> The service interrupt is handled in a followup patch.
> 
> Signed-off-by: Michael Mueller <mimu@xxxxxxxxxxxxx>
> Reviewed-by: Thomas Huth <thuth@xxxxxxxxxx>
> [borntraeger@xxxxxxxxxx: patch merging, splitting, fixing]
> Signed-off-by: Christian Borntraeger <borntraeger@xxxxxxxxxx>
> ---
>  arch/s390/include/asm/kvm_host.h |  62 +++++++++++++----
>  arch/s390/kvm/interrupt.c        | 115 +++++++++++++++++++++++--------
>  2 files changed, 138 insertions(+), 39 deletions(-)

Reviewed-by: Cornelia Huck <cohuck@xxxxxxxxxx>




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