[PATCH v6 0/6] Support for H_RPT_INVALIDATE in PowerPC KVM

[Bharata B Rao]

This patchset adds support for the new hcall H_RPT_INVALIDATE
and replaces the nested tlb flush calls with this new hcall
if support for the same exists.

Changes in v6:
-------------
- Split the patch that adds hcall support in to three parts so that
  it becomes easy to understand.
  part1: hcall support for L1 guest
  part2: hcall support for nested guests
  part3: add KVM_CAP_PPC_RPT_INVALIDATE
- Renames, comments and code reorgs to improve readability of the
  patches.
- Added a patch to fix comments in hcall args (Aneesh).
- Added hcall documentation as part of commit message.
- Correct handling for partition-scoped invalidation of nested
  guests (Aneesh).

I haven't addressed the optimization that David suggested for
psize_to_rpti_pgsize() and that could be done later separately.

This patchset passes the following tests:
-----------------------------------------
- Boot and reboot of L1, L2 and L3 guests with GTSE=0.
- Boot and reboot of L1 and multiple L2 guests with GTSE=0
- vm class stress-ng tests on L3 with GTSE=0
- Boot and reboot of L1, L2 and L3 guest with GTSE=1

v5: https://lore.kernel.org/linuxppc-dev/20210224082510.3962423-1-bharata@linux.ibm.com/T/#t

Aneesh Kumar K.V (1):
  KVM: PPC: Book3S HV: Fix comments of H_RPT_INVALIDATE arguments

Bharata B Rao (5):
  powerpc/book3s64/radix: Add H_RPT_INVALIDATE pgsize encodings to
    mmu_psize_def
  KVM: PPC: Book3S HV: Add support for H_RPT_INVALIDATE
  KVM: PPC: Book3S HV: Nested support in H_RPT_INVALIDATE
  KVM: PPC: Book3S HV: Add KVM_CAP_PPC_RPT_INVALIDATE capability
  KVM: PPC: Book3S HV: Use H_RPT_INVALIDATE in nested KVM

 Documentation/virt/kvm/api.rst                |  18 +++
 arch/powerpc/include/asm/book3s/64/mmu.h      |   1 +
 .../include/asm/book3s/64/tlbflush-radix.h    |   4 +
 arch/powerpc/include/asm/hvcall.h             |   4 +-
 arch/powerpc/include/asm/kvm_book3s.h         |   3 +
 arch/powerpc/include/asm/mmu_context.h        |  11 ++
 arch/powerpc/kvm/book3s_64_mmu_radix.c        |  27 +++-
 arch/powerpc/kvm/book3s_hv.c                  | 111 +++++++++++++
 arch/powerpc/kvm/book3s_hv_nested.c           | 116 ++++++++++++-
 arch/powerpc/kvm/powerpc.c                    |   3 +
 arch/powerpc/mm/book3s64/radix_pgtable.c      |   5 +
 arch/powerpc/mm/book3s64/radix_tlb.c          | 152 +++++++++++++++++-
 include/uapi/linux/kvm.h                      |   1 +
 13 files changed, 443 insertions(+), 13 deletions(-)

-- 
2.26.2