[PATCH v4 0/3] Support for H_RPT_INVALIDATE in PowerPC KVM

[Bharata B Rao <bharata@linux.ibm.com>]

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 v4:
-------------
- While reusing the tlb flush routines from radix_tlb.c in v3,
  setting of LPID got missed out. Take care of this by
  introducing new flush routines that set both PID and LPID
  when using tlbie instruction. This is required for
  process-scoped invalidations from guests (both L1 and
  nested guests). Added a new patch 1/3 for this.
- Added code to handle H_RPT_INVALIDATE hcall issued
  by nested guest in L0 nested guest exit path.

v3: https://lore.kernel.org/linuxppc-dev/20210105090557.2150104-1-bharata@linux.ibm.com/T/#t

Bharata B Rao (3):
  powerpc/book3s64/radix/tlb: tlbie primitives for process-scoped
    invalidations from guests
  KVM: PPC: Book3S HV: Add support for H_RPT_INVALIDATE
  KVM: PPC: Book3S HV: Use H_RPT_INVALIDATE in nested KVM

 Documentation/virt/kvm/api.rst                |  17 ++
 .../include/asm/book3s/64/tlbflush-radix.h    |  18 +++
 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                  |  91 +++++++++++
 arch/powerpc/kvm/book3s_hv_nested.c           | 108 ++++++++++++-
 arch/powerpc/kvm/powerpc.c                    |   3 +
 arch/powerpc/mm/book3s64/radix_tlb.c          | 147 +++++++++++++++++-
 include/uapi/linux/kvm.h                      |   1 +
 10 files changed, 415 insertions(+), 11 deletions(-)

-- 
2.26.2