As we finally want to get rid of the nested and hpage s390 KVM module parameters let's try again to integrate huge page VSIE support. The following patches have been rebased on 5.11-rc3 and enable us to start huge page and normal page VSIE guest 3s in a huge page guest 2. Branch: https://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux.git/log/?h=hlp_vsie Problems that need to be solved: * The VSIE guests crash on migration... * I have lost most of my knowledge about this topic and I'm currently paging back in * Lots of testing 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: factor out idte global flush into 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/virt/kvm/api.rst | 9 +- 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 | 917 ++++++++++++++++++++++++-------- arch/s390/mm/pgtable.c | 61 ++- 7 files changed, 819 insertions(+), 270 deletions(-) -- 2.27.0
