ACK/cmnt: [Zesty][PATCH v4 00/10] Cherry pick - KVM fix for Power9 - HWE

[Kleber Souza]

On 08/17/17 12:29, Kleber Souza wrote:
> On 08/07/17 17:44, Jose Ricardo Ziviani wrote:
>> buglink: https://bugs.launchpad.net/ubuntu/+source/kernel-package/+bug/1686019
>>
>> V4:
>>  - Removed patch: locking/atomic, kref: Add kref_read() (upstream: 2c935bc)
>>  - Updated patch: KVM: PPC: VFIO: Add in-kernel acceleration for VFIO to reflect it
>>  - Rebased on top zesty/master-next
>>  - Re-compiled/Re-tested in Power9 LE successfuly 
> 
> Hi Ziviani,
> 
> The code looks good to me after the suggested changes applied on v4.
> 
> My only objection is regarding the commit message of the two patches
> that required to be backported. I have replied to them individually with
> comments about the changes needed. Since they are small changes that
> doesn't affect the code, you can resubmit only these two patches
> (replying to this original thread).
> 

I agree with Stefan that this is a minor work to be done while applying
the patches, so:

Acked-by: Kleber Sacilotto de Souza <kleber.souza at canonical.com>

>>
>> V3:
>>  - PATCH KVM: PPC: Reserve KVM_CAP_SPAPR_TCE_VFIO capability number
>>    - changed from "cherry picked from" to "backported from"
>>
>> V2:
>>  - Cherry-picked with -x -s + added Buglink
>>  - Rebased on top of zesty/master-next and updated the bug to affect linux-hwe
>>  - Removed those MIPS/S390 patches from V1 and resolved the conflict of 4898d3f to avoid custom commit
>>  - Re-compiled in both x86 and Power9 LE, re-tested in Power9 LE
>>
>> This patchset includes the fix
>> https://github.com/torvalds/linux/commit/acde257
>> KVM: PPC: Book3S HV: Add radix checks in real-mode hypercall handlers
>>
>> which is necessary to have KVM working on Ubuntu 16.04.3 for Power9. It also includes its dependencies.
>>
>> Unfortunately it wasn't possible to perform a clean cherry-pick, a small conflict resolution was required in order to apply one of them.
>>
>> They are based on zesty/master-next
>>
>> KVM: PPC: Book3S HV: Add radix checks in real-mode hypercall handlers
>>     - Cherry picked (upstream: acde257)
>>
>> KVM: PPC: Reserve KVM_CAP_SPAPR_TCE_VFIO capability number
>>     - Cherry picked (upstream: 4898d3f)
>>     - small conflict resolved in include/uapi/linux/kvm.h because changes from
>>       MIPS and S390 have added #defines before it.
>>
>> locking/atomic, kref: Add kref_read()
>>     - Cherry picked (upstream: 2c935bc)
>>
>> powerpc/mmu: Add real mode support for IOMMU preregistered memory
>>     - Cherry picked (upstream: 6b5c19c)
>>
>> powerpc/vfio_spapr_tce: Add reference counting to iommu_table
>>     - Cherry picked (upstream: e5afdf9)
>>
>> powerpc/iommu/vfio_spapr_tce: Cleanup iommu_table disposal
>>     - Cherry picked (upstream: 11edf11)
>>
>> powerpc/powernv/ioda2: Update iommu table base on ownership change
>>     - Cherry picked (upstream: db08e1d)
>>
>> powerpc/powernv/iommu: Add real mode version of iommu_table_ops::exchange()
>>     - Cherry picked (upstream: a540aa5)
>>
>> KVM: PPC: VFIO: Add in-kernel acceleration for VFIO
>>     - Cherry picked (upstream: 121f80b)
>>     - Removed kref_read to avoid dependency on commit 2c935bc
>>
>> KVM: PPC: Use preregistered memory API to access TCE list
>>     - Cherry picked (upstream: da6f59e)
>>
>> KVM: PPC: Pass kvm* to kvmppc_find_table()
>>     - Cherry picked (upstream: 503bfcb)
>>
>> Thank you very much!
>>
>>
>> Alexey Kardashevskiy (9):
>>   KVM: PPC: Pass kvm* to kvmppc_find_table()
>>   KVM: PPC: Use preregistered memory API to access TCE list
>>   KVM: PPC: VFIO: Add in-kernel acceleration for VFIO
>>   powerpc/powernv/iommu: Add real mode version of
>>     iommu_table_ops::exchange()
>>   powerpc/powernv/ioda2: Update iommu table base on ownership change
>>   powerpc/iommu/vfio_spapr_tce: Cleanup iommu_table disposal
>>   powerpc/vfio_spapr_tce: Add reference counting to iommu_table
>>   powerpc/mmu: Add real mode support for IOMMU preregistered memory
>>   KVM: PPC: Reserve KVM_CAP_SPAPR_TCE_VFIO capability number
>>
>> Paul Mackerras (1):
>>   KVM: PPC: Book3S HV: Add radix checks in real-mode hypercall handlers
>>
>>  Documentation/virtual/kvm/devices/vfio.txt |  18 +-
>>  arch/powerpc/include/asm/iommu.h           |  12 +-
>>  arch/powerpc/include/asm/kvm_host.h        |   8 +
>>  arch/powerpc/include/asm/kvm_ppc.h         |   6 +-
>>  arch/powerpc/include/asm/mmu_context.h     |   4 +
>>  arch/powerpc/kernel/iommu.c                |  54 ++++-
>>  arch/powerpc/kvm/book3s_64_vio.c           | 312 ++++++++++++++++++++++++++++-
>>  arch/powerpc/kvm/book3s_64_vio_hv.c        | 285 +++++++++++++++++++++++---
>>  arch/powerpc/kvm/book3s_hv_builtin.c       |   9 +-
>>  arch/powerpc/kvm/powerpc.c                 |   2 +
>>  arch/powerpc/mm/mmu_context_iommu.c        |  39 ++++
>>  arch/powerpc/platforms/powernv/pci-ioda.c  |  63 ++++--
>>  arch/powerpc/platforms/powernv/pci.c       |   1 +
>>  arch/powerpc/platforms/pseries/iommu.c     |   3 +-
>>  arch/powerpc/platforms/pseries/vio.c       |   2 +-
>>  drivers/vfio/vfio_iommu_spapr_tce.c        |   2 +-
>>  include/uapi/linux/kvm.h                   |   7 +
>>  virt/kvm/vfio.c                            | 105 ++++++++++
>>  18 files changed, 874 insertions(+), 58 deletions(-)
>>