From: Janosch Frank <frankja@linux.ibm.com>
To: David Hildenbrand <david@redhat.com>, linux-kernel@vger.kernel.org
Cc: linux-s390@vger.kernel.org,
Heiko Carstens <heiko.carstens@de.ibm.com>,
Martin Schwidefsky <schwidefsky@de.ibm.com>,
Cornelia Huck <cohuck@redhat.com>,
Christian Borntraeger <borntraeger@de.ibm.com>,
Pierre Morel <pmorel@linux.ibm.com>
Subject: Re: [PATCH RFC 2/2] KVM: s390: introduce and use KVM_REQ_VSIE_RESTART
Date: Thu, 9 Aug 2018 07:39:17 +0200 [thread overview]
Message-ID: <c45051e1-7079-d401-25c7-5abe018b3473@linux.ibm.com> (raw)
In-Reply-To: <20180807125131.3606-3-david@redhat.com>
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On 07.08.2018 14:51, David Hildenbrand wrote:
> When we change the crycb (or execution controls), we also have to make sure
> that the vSIE shadow datastructures properly consider the changed
> values before rerunning the vSIE. We can achieve that by simply using a
> VCPU request now.
>
> This has to be a synchronous request (== handled before entering the
> (v)SIE again).
>
> The request will make sure that the vSIE handler is left, and that the
> request will be processed (NOP), therefore forcing a reload of all
> vSIE data (including rebuilding the crycb) when re-entering the vSIE
> interception handler the next time.
>
> Signed-off-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Janosch Frank <frankja@linux.ibm.com>
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next prev parent reply other threads:[~2018-08-09 5:39 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-08-07 12:51 [PATCH RFC 0/2] KVM: s390: vsie: support VCPU requests David Hildenbrand
2018-08-07 12:51 ` [PATCH RFC 1/2] KVM: s390: vsie: simulate VCPU SIE entry/exit David Hildenbrand
2018-08-07 17:06 ` Pierre Morel
2018-08-08 12:44 ` Cornelia Huck
2018-08-09 5:38 ` Janosch Frank
2018-08-09 7:20 ` David Hildenbrand
2018-08-07 12:51 ` [PATCH RFC 2/2] KVM: s390: introduce and use KVM_REQ_VSIE_RESTART David Hildenbrand
2018-08-07 17:06 ` Pierre Morel
2018-08-08 12:47 ` Cornelia Huck
2018-08-08 12:53 ` David Hildenbrand
2018-08-09 5:39 ` Janosch Frank [this message]
2018-08-07 17:15 ` [PATCH RFC 0/2] KVM: s390: vsie: support VCPU requests Pierre Morel
2018-08-07 17:35 ` David Hildenbrand
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