linux-kernel - Re: [PATCH v4 02/15] KVM: s390: reset crypto attributes for all vcpus

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Date:   Tue, 17 Apr 2018 13:54:45 -0400
From:   Tony Krowiak <akrowiak@...ux.vnet.ibm.com>
To:     Cornelia Huck <cohuck@...hat.com>
Cc:     Halil Pasic <pasic@...ux.vnet.ibm.com>, linux-s390@...r.kernel.org,
        linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
        freude@...ibm.com, schwidefsky@...ibm.com,
        heiko.carstens@...ibm.com, borntraeger@...ibm.com,
        kwankhede@...dia.com, bjsdjshi@...ux.vnet.ibm.com,
        pbonzini@...hat.com, alex.williamson@...hat.com,
        pmorel@...ux.vnet.ibm.com, alifm@...ux.vnet.ibm.com,
        mjrosato@...ux.vnet.ibm.com, jjherne@...ux.vnet.ibm.com,
        thuth@...hat.com, berrange@...hat.com, fiuczy@...ux.vnet.ibm.com,
        buendgen@...ibm.com
Subject: Re: [PATCH v4 02/15] KVM: s390: reset crypto attributes for all vcpus

On 04/17/2018 11:10 AM, Cornelia Huck wrote:
> On Tue, 17 Apr 2018 10:55:30 -0400
> Tony Krowiak <akrowiak@...ux.vnet.ibm.com> wrote:
>
>> On 04/17/2018 10:29 AM, Halil Pasic wrote:
>>>
>>> On 04/15/2018 11:22 PM, Tony Krowiak wrote:
>>>> Introduces a new function to reset the crypto attributes for all
>>>> vcpus whether they are running or not. Each vcpu in KVM will
>>>> be removed from SIE prior to resetting the crypto attributes in its
>>>> SIE state description. After all vcpus have had their crypto attributes
>>>> reset the vcpus will be restored to SIE.
>>>>
>>>> This function will be used in a later patch to set the ECA.28
>>>> bit in the SIE state description to enable interpretive execution of
>>>> AP instructions. It will also be incorporated into the
>>>> kvm_s390_vm_set_crypto(kvm) function to fix an issue whereby the crypto
>>>> key wrapping attributes could potentially get out of synch for running
>>>> vcpus.
>>>>   
>>> Wasn't this 'issue' reported by me by any chance?
>> Yes it was .... was I supposed to include that fact in the commit message?
> A Reported-by: is usually nice.
I wasn't aware of such a tag.
>
>>> I agree with Connnie, we don't need the forward reference to
>>> ECA.28.
>> I'm not sure that's exactly what she said, but I'd be more than happy
>> to remove it.
> It was kind of implied :)
>