• Michael Mueller's avatar
    KVM: s390: include guest facilities in kvm facility test · 981467c9
    Michael Mueller authored
    Most facility related decisions in KVM have to take into account:
    
    - the facilities offered by the underlying run container (LPAR/VM)
    - the facilities supported by the KVM code itself
    - the facilities requested by a guest VM
    
    This patch adds the KVM driver requested facilities to the test routine.
    
    It additionally renames struct s390_model_fac to kvm_s390_fac and its field
    names to be more meaningful.
    
    The semantics of the facilities stored in the KVM architecture structure
    is changed. The address arch.model.fac->list now points to the guest
    facility list and arch.model.fac->mask points to the KVM facility mask.
    
    This patch fixes the behaviour of KVM for some facilities for guests
    that ignore the guest visible facility bits, e.g. guests could use
    transactional memory intructions on hosts supporting them even if the
    chosen cpu model would not offer them.
    
    The userspace interface is not affected by this change.
    Signed-off-by: default avatarMichael Mueller <mimu@linux.vnet.ibm.com>
    Signed-off-by: default avatarChristian Borntraeger <borntraeger@de.ibm.com>
    981467c9
kvm-s390.h 8.85 KB