[PATCH 0/3] KVM: PPC: e500: Shadow TLB Improvements

[Alexander Graf <agraf@suse.de>]

This patch set improves the shadow TLB handling of our e500
target.

The really important bit here is that with these patches applied,
we can map guest TLB1 entries into the host's TLB0. This gives a
significant performance improvement as you can see below.

Alex

---

without patch, using 4k backed memory:

$ time for i in {1..1000}; do /bin/echo > /dev/null; done
real	0m12.947s
user	0m1.076s
sys	0m9.720s


with hugetlbfs:

$ time for i in {1..1000}; do /bin/echo > /dev/null; done

real	0m3.262s
user	0m0.464s
sys	0m0.236s


with patches applied, using 4k backed memory:

$ time for i in {1..1000}; do /bin/echo > /dev/null; done

real	0m4.446s
user	0m0.380s
sys	0m0.644s


Alexander Graf (3):
  KVM: PPC: e500: Call kvmppc_mmu_map for initial mapping
  KVM: PPC: E500: Split host and guest MMU parts
  KVM: PPC: e500: Implement TLB1-in-TLB0 mapping

 arch/powerpc/kvm/Makefile        |    9 +-
 arch/powerpc/kvm/e500.h          |    5 +-
 arch/powerpc/kvm/e500_mmu.c      |  812 +++++++++++++++++++++
 arch/powerpc/kvm/e500_mmu_host.c |  686 ++++++++++++++++++
 arch/powerpc/kvm/e500_mmu_host.h |   20 +
 arch/powerpc/kvm/e500_tlb.c      | 1430 --------------------------------------
 6 files changed, 1528 insertions(+), 1434 deletions(-)
 create mode 100644 arch/powerpc/kvm/e500_mmu.c
 create mode 100644 arch/powerpc/kvm/e500_mmu_host.c
 create mode 100644 arch/powerpc/kvm/e500_mmu_host.h
 delete mode 100644 arch/powerpc/kvm/e500_tlb.c