[PATCH v2 00/20] KVM: s390: gmap rewrite, the real deal

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

This series is the last big series of the gmap rewrite. It introduces
the new code and actually uses it. The old code is then removed.

The insertions/deletions balance is negative both for this series, and
for the whole rewrite, also considering all the preparatory patches.

KVM on s390 will now use the mmu_notifier, like most other
architectures. The gmap address space is now completely separate from
userspace; no level of the page tables is shared between guest mapping
and userspace.

One of the biggest advantages is that the page size of userspace is
completely independent of the page size used by the guest. Userspace
can mix normal pages, THPs, hugetlbfs, and more.

Patches 1 to 6 are mostly preparations; introducing some new bits and
functions, and moving code around.

Patch 7 to 14 is the meat of the new gmap code; page table management
functions and gmap management. This is the code that will be used to
manage guest memory.

Patch 16 is unfortunately big; the existing code is converted to use
the new gmap and all references to the old gmap are removed. This needs
to be done all at once, unfortunately, hence the size of the patch.

Patch 17 and 18 remove all the now unused code.

Patch 19 and 20 allow for 1M pages to be used to back guests, and add
some more functions that are useful for testing.


If you are not in the CC list, you probably have not received v1, as
it was not sent out publicly; you did not miss it :)
That's also where the various R-Bs come from.


Claudio Imbrenda (20):
  KVM: s390: add P bit in table entry bitfields, move union vaddress
  s390: Move sske_frame() to a header
  KVM: s390: Add gmap_helper_set_unused()
  KVM: s390: Enable KVM_GENERIC_MMU_NOTIFIER
  KVM: s390: Add helper functions for fault handling
  KVM: s390: Rename some functions in gaccess.c
  KVM: s390: KVM-specific bitfields and helper functions
  KVM: s390: KVM page table management functions: allocation
  KVM: s390: KVM page table management functions: clear and replace
  KVM: s390: KVM page table management functions: walks
  KVM: s390: KVM page table management functions: storage keys
  KVM: s390: KVM page table management functions: lifecycle management
  KVM: s390: KVM page table management functions: CMMA
  KVM: s390: New gmap code
  KVM: s390: Stop using CONFIG_PGSTE
  KVM: s390: Switch to new gmap
  KVM: s390: Remove gmap from s390/mm
  KVM: S390: Remove PGSTE code from linux/s390 mm
  KVM: s390: Enable 1M pages for gmap
  KVM: s390: Storage key manipulation IOCTL

 MAINTAINERS                          |    2 -
 arch/s390/Kconfig                    |    3 -
 arch/s390/include/asm/dat-bits.h     |   32 +-
 arch/s390/include/asm/gmap.h         |  174 --
 arch/s390/include/asm/gmap_helpers.h |    1 +
 arch/s390/include/asm/kvm_host.h     |    1 +
 arch/s390/include/asm/mmu.h          |   13 -
 arch/s390/include/asm/mmu_context.h  |    6 +-
 arch/s390/include/asm/page.h         |    4 -
 arch/s390/include/asm/pgalloc.h      |    2 -
 arch/s390/include/asm/pgtable.h      |  119 +-
 arch/s390/include/asm/tlb.h          |    3 -
 arch/s390/kvm/Kconfig                |    3 +-
 arch/s390/kvm/Makefile               |    3 +-
 arch/s390/kvm/dat.c                  | 1260 +++++++++++++
 arch/s390/kvm/dat.h                  |  843 +++++++++
 arch/s390/kvm/diag.c                 |    2 +-
 arch/s390/kvm/gaccess.c              |  599 ++++---
 arch/s390/kvm/gaccess.h              |   30 +-
 arch/s390/kvm/gmap-vsie.c            |  141 --
 arch/s390/kvm/gmap.c                 | 1066 +++++++++++
 arch/s390/kvm/gmap.h                 |  178 ++
 arch/s390/kvm/intercept.c            |    8 +-
 arch/s390/kvm/interrupt.c            |    2 +-
 arch/s390/kvm/kvm-s390.c             |  808 ++++-----
 arch/s390/kvm/kvm-s390.h             |   75 +-
 arch/s390/kvm/priv.c                 |  206 +--
 arch/s390/kvm/pv.c                   |   87 +-
 arch/s390/kvm/vsie.c                 |  116 +-
 arch/s390/mm/Makefile                |    1 -
 arch/s390/mm/fault.c                 |    4 +-
 arch/s390/mm/gmap.c                  | 2452 --------------------------
 arch/s390/mm/gmap_helpers.c          |   64 +
 arch/s390/mm/hugetlbpage.c           |   24 -
 arch/s390/mm/page-states.c           |    1 +
 arch/s390/mm/pageattr.c              |    7 -
 arch/s390/mm/pgalloc.c               |   29 -
 arch/s390/mm/pgtable.c               |  837 +--------
 include/uapi/linux/kvm.h             |   10 +
 mm/khugepaged.c                      |    9 -
 40 files changed, 4380 insertions(+), 4845 deletions(-)
 delete mode 100644 arch/s390/include/asm/gmap.h
 create mode 100644 arch/s390/kvm/dat.c
 create mode 100644 arch/s390/kvm/dat.h
 delete mode 100644 arch/s390/kvm/gmap-vsie.c
 create mode 100644 arch/s390/kvm/gmap.c
 create mode 100644 arch/s390/kvm/gmap.h
 delete mode 100644 arch/s390/mm/gmap.c

-- 
2.51.0