Re: [PATCH 34/35] KVM: s390: protvirt: Add UV cpu reset calls

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On Fri,  7 Feb 2020 06:39:57 -0500
Christian Borntraeger <borntraeger@xxxxxxxxxx> wrote:

> From: Janosch Frank <frankja@xxxxxxxxxxxxx>
> 
> For protected VMs, the VCPU resets are done by the Ultravisor, as KVM
> has no access to the VCPU registers.
> 
> As the Ultravisor will only accept a call for the reset that is
> needed, we need to fence the UV calls when chaining resets.

Last time, I suggested replacing this with

"Note that the ultravisor will only accept a call for the exact reset
that has been requested."

I still suggest that :)

> 
> Signed-off-by: Janosch Frank <frankja@xxxxxxxxxxxxx>
> Reviewed-by: Thomas Huth <thuth@xxxxxxxxxx>
> Reviewed-by: David Hildenbrand <david@xxxxxxxxxx>
> [borntraeger@xxxxxxxxxx: patch merging, splitting, fixing]
> Signed-off-by: Christian Borntraeger <borntraeger@xxxxxxxxxx>
> ---
>  arch/s390/kvm/kvm-s390.c | 20 ++++++++++++++++++++
>  1 file changed, 20 insertions(+)

Reviewed-by: Cornelia Huck <cohuck@xxxxxxxxxx>




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