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@linux.ibm.com Cc: stable@vger.kernel.org Reviewed-by: Janosch Frank frankja@de.ibm.com Reviewed-by: David Hildenbrand david@redhat.com

Reviewed-by: Christian Borntraeger borntraeger@de.ibm.com