linux-kernel - Re: [PATCH v11 10/19] KVM: s390: pv: add mmu

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Message-ID: <20220608140207.23c79f1c@li-ca45c2cc-336f-11b2-a85c-c6e71de567f1>
Date:   Wed, 8 Jun 2022 14:02:07 +0200
From:   Nico Boehr <nrb@...ux.ibm.com>
To:     Claudio Imbrenda <imbrenda@...ux.ibm.com>
Cc:     kvm@...r.kernel.org, borntraeger@...ibm.com, frankja@...ux.ibm.com,
        thuth@...hat.com, pasic@...ux.ibm.com, david@...hat.com,
        linux-s390@...r.kernel.org, linux-kernel@...r.kernel.org,
        scgl@...ux.ibm.com, mimu@...ux.ibm.com
Subject: Re: [PATCH v11 10/19] KVM: s390: pv: add mmu_notifier

On Fri,  3 Jun 2022 08:56:36 +0200
Claudio Imbrenda <imbrenda@...ux.ibm.com> wrote:

> Add an mmu_notifier for protected VMs. The callback function is
> triggered when the mm is torn down, and will attempt to convert all
> protected vCPUs to non-protected. This allows the mm teardown to use
> the destroy page UVC instead of export.
> 
> Also make KVM select CONFIG_MMU_NOTIFIER, needed to use mmu_notifiers.
> 
> Signed-off-by: Claudio Imbrenda <imbrenda@...ux.ibm.com>
> Acked-by: Janosch Frank <frankja@...ux.ibm.com>

Reviewed-by: Nico Boehr <nrb@...ux.ibm.com>