linux-kernel - Re: [PATCH v5 2/3] s390/kvm: extend kvm_s390_shadow

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Date:   Fri, 5 Mar 2021 18:01:02 +0100
From:   Christian Borntraeger <borntraeger@...ibm.com>
To:     Claudio Imbrenda <imbrenda@...ux.ibm.com>,
        linux-kernel@...r.kernel.org
Cc:     frankja@...ux.ibm.com, david@...hat.com, cohuck@...hat.com,
        kvm@...r.kernel.org, linux-s390@...r.kernel.org,
        stable@...r.kernel.org, Janosch Frank <frankja@...ibm.com>
Subject: Re: [PATCH v5 2/3] s390/kvm: extend kvm_s390_shadow_fault to return
 entry pointer



On 02.03.21 18:44, Claudio Imbrenda wrote:
> Extend kvm_s390_shadow_fault to return the pointer to the valid leaf
> DAT table entry, or to the invalid entry.
> 
> Also return some flags in the lower bits of the address:
> PEI_DAT_PROT: indicates that DAT protection applies because of the
>                protection bit in the segment (or, if EDAT, region) tables.
> PEI_NOT_PTE: indicates that the address of the DAT table entry returned
>               does not refer to a PTE, but to a segment or region table.
> 
> Signed-off-by: Claudio Imbrenda <imbrenda@...ux.ibm.com>
> Cc: stable@...r.kernel.org
> Reviewed-by: Janosch Frank <frankja@...ibm.com>
> Reviewed-by: David Hildenbrand <david@...hat.com>

Reviewed-by: Christian Borntraeger <borntraeger@...ibm.com>