[PATCH v3 0/1] target/s390x: Allow 2G hugepages guest backing

[Claudio Imbrenda <imbrenda@linux.ibm.com>]

Allow mapping guest with 2G hugepages on hosts that support it.
    
Add new helper functions to check whether hpages are in effect, and
which size.

v2->v3:
* Remove dead code introduced in the previous version.
* Factor out the capability enablement and error reporting to avoid
  duplicating code and error messages.
* Optimize the control flow and bring it back in line with the previous
  behaviour regarding page sizes, i.e. assuming that if the page size
  is neither 4K nor 1M, then it must be 2G.

v1->v2:
* Rename the global variable to cap_hpage
* Use different values of cap_hpage to distinguish between hpage sizes
* Add wrappers to test for specific hpage sizes

Claudio Imbrenda (1):
  target/s390x: Allow 2G hugepages guest backing

 target/s390x/diag.c          |  2 +-
 target/s390x/kvm/kvm.c       | 36 +++++++++++++++++-------------------
 target/s390x/kvm/kvm_s390x.h |  2 +-
 target/s390x/kvm/stubs.c     |  2 +-
 4 files changed, 20 insertions(+), 22 deletions(-)

-- 
2.55.0