[PATCH 0/2] KVM Book3E support for Hardware Page Tablewalk enabled guests

[PATCH 0/2] KVM Book3E support for Hardware Page Tablewalk enabled guests

[Laurentiu Tudor]

This is a revival of LRAT & HWPTW support that Mike
submitted some time ago [1].
Patches are rebased and (most [2]) feedback addressed.
Also, fixed some issues i noticed plus some cleanup.

[1]  https://patchwork.ozlabs.org/patch/366892/
     https://patchwork.ozlabs.org/patch/366895/
     https://patchwork.ozlabs.org/patch/366893/
     https://patchwork.ozlabs.org/patch/366894/

[2] Comments not addressed
[Alex] "Don't we have to keep the page locked so it doesn't get swapped away?"
 * when will the page be unlocked?
 * Alex, can you please elaborate more on this? Where would the unlock happen if
   we keep it locked here?
[Scott] "use local_paca->tcd for tlb1 as well (except on 32-bit)"
 * i guess this needs a distinct patch, no?
[Scott] "A-008139"
 * distinct patch adding the erratum workaround
   in __write_host_tlbe(), e500_mmu_host.c

Detailed changes per patch from RFC:

[1/4] powerpc/booke64: Add LRAT next and max entries to tlb_core_data structure
[2/4] KVM: PPC: Book3E: Handle LRAT error exception
 - use tcd_ptr pointing to common tcd instead of local paca tcd
 - drop lrat_size() as it only had 2 uses
 - squashed these 2 patches as they address the same topic (lrat support):
 - mmap_sem was left locked on an exit path
 - wrapped new tcd struct members with #ifdef CONFIG_KVM_BOOKE_HV
 - dropped inline in c files (Alex)
 - changed lrat_next() implementation (Alex, Scott)
 - s/WARN/WARN_ONCE (Alex, Scott)
 - dropped write_host_lrate() unused lrat_entry param (Scott)
 - use get_paca() instead of local_paca (Scott)
[3/4] KVM: PPC: e500: TLB emulation for IND entries
[4/4] KVM: PPC: e500mc: Advertise E.PT to support HTW guests
 - squashed these too as they address the same topic (add HPTW support)
 - rebased & merged with e6500 single threaded vcpu support
 - commented inval_*_on_host() (Scott)
 - split generic MMUv2 support in a distinct patch (Scott)
 - s/tlbilx 3/tlbilxva/ (Scott)
 - code style (Scott)
 - dropped inval_tlb_on_host() and called kvmppc_e500_tlbil_lpid() or
   kvmppc_e500_tlbil_pid() directly (Scott)
 - for better naming and consistency:
    s/kvmppc_e500_tlbil_lpid/kvmppc_e500_tlbil_lpid_on_host
    s/kvmppc_e500_tlbil_pid/kvmppc_e500_tlbil_pid_on_host
    s/inval_ea_on_host/kvmppc_e500_tlbil_ea_on_host
 - use MAS4_TLBSELD instead of open-coding
 - reworded some comments
 - TSIZE of a page table of an IND entry may be <4K so don't limit it


Mihai Caraman (2):
  KVM: PPC: e6500: Handle LRAT error exception
  KVM: PPC: e6500: TLB emulation for IND entries

 arch/powerpc/include/asm/kvm_host.h   |   1 +
 arch/powerpc/include/asm/kvm_ppc.h    |   2 +
 arch/powerpc/include/asm/mmu-book3e.h |  14 ++++
 arch/powerpc/include/asm/reg_booke.h  |  14 ++++
 arch/powerpc/kernel/asm-offsets.c     |   1 +
 arch/powerpc/kvm/booke.c              |  41 ++++++++++
 arch/powerpc/kvm/bookehv_interrupts.S |   9 ++-
 arch/powerpc/kvm/e500.h               |  93 +++++++++++++++++++----
 arch/powerpc/kvm/e500_mmu.c           |  92 ++++++++++++++++++-----
 arch/powerpc/kvm/e500_mmu_host.c      | 136 +++++++++++++++++++++++++++++++++-
 arch/powerpc/kvm/e500mc.c             |  49 +++++++++++-
 arch/powerpc/mm/fsl_booke_mmu.c       |  10 +++
 12 files changed, 421 insertions(+), 41 deletions(-)

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1.8.3.1
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