Let's continue with the hpage updates and introduce splitting as well as VSIE support. A lot of problems have been fixed since I introduced these patches the last time. Swapping and loaded migration tests have been successful. The locking is now done via the userspace mm pmd lock instead of the guest_table_lock, which fixed a lot of potential locking problems between pgtable.c and gmap.c functions. VSIE handling has been slightly redesigned to handle all combinations instead of only edge cases. Split pages are being modified by common pgtable.c functions as much as possible and got pgste locking before modifications. There's still a lot of cleanup and documentation to do, but let's put it out there. Branch: git://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux.git hlp_vsie https://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux.git/log/?h=hlp_vsie Janosch Frank (14): s390/mm: Code cleanups s390/mm: Improve locking for huge page backings s390/mm: Take locking out of gmap_protect_pte s390/mm: split huge pages in GMAP when protecting s390/mm: Split huge pages when migrating s390/mm: Provide vmaddr to pmd notification s390/mm: Add gmap_idte_global s390/mm: Make gmap_read_table EDAT1 compatible s390/mm: Make gmap_protect_rmap EDAT1 compatible s390/mm: Add simple ptep shadow function s390/mm: Add gmap shadowing for large pmds s390/mm: Add gmap lock classes s390/mm: Pull pmd invalid check in gmap_pmd_op_walk KVM: s390: Allow the VSIE to be used with huge pages Documentation/virtual/kvm/api.txt | 7 +- arch/s390/include/asm/gmap.h | 31 +- arch/s390/include/asm/pgtable.h | 5 + arch/s390/kvm/gaccess.c | 52 ++- arch/s390/kvm/kvm-s390.c | 14 +- arch/s390/mm/gmap.c | 905 ++++++++++++++++++++++++++++---------- arch/s390/mm/pgtable.c | 61 ++- 7 files changed, 806 insertions(+), 269 deletions(-) -- 2.14.3
