This prepares existing upstream kernel for DDW (Dynamic DMA windows) and
adds actual DDW support for VFIO.
This patchset does not contain any in-kernel acceleration stuff.
This patchset does not enable DDW for emulated devices.
Changes:
v3:
* applied multiple comments from Gavin regarding error checking
and callbacks placements
v2:
* moved "Account TCE pages in locked_vm" here (was in later series)
* added counting for huge window to locked_vm (ugly but better than nothing)
* fixed bug with missing >>PAGE_SHIFT when calling pfn_to_page
Alexey Kardashevskiy (18):
powerpc/iommu: Fix comments with it_page_shift
KVM: PPC: Use RCU when adding to arch.spapr_tce_tables
KVM: PPC: Account TCE pages in locked_vm
vfio: powerpc: Move locked_vm accounting to a helper
powerpc/powernv: Use it_page_shift for TCE invalidation
powerpc/powernv: Use it_page_shift in TCE build
powerpc/powernv: Add a page size parameter to
pnv_pci_setup_iommu_table()
powerpc/powernv: Make invalidate() a callback
powerpc/spapr: vfio: Implement spapr_tce_iommu_ops
powerpc/powernv: Convert/move set_bypass() callback to
take_ownership()
powerpc/iommu: Fix IOMMU ownership control functions
powerpc/iommu: Fix missing permission bits in
iommu_put_tce_user_mode()
powerpc/iommu: Extend ppc_md.tce_build(_rm) to return old TCE values
powerpc/powernv: Return non-zero TCE from pnv_tce_build
powerpc/iommu: Implement put_page() if TCE had non-zero value
powerpc/powernv: Implement Dynamic DMA windows (DDW) for IODA
vfio: Use it_page_size
vfio: powerpc: Enable Dynamic DMA windows
arch/powerpc/include/asm/iommu.h | 7 +-
arch/powerpc/include/asm/machdep.h | 2 +
arch/powerpc/include/asm/tce.h | 38 +++
arch/powerpc/kernel/iommu.c | 98 +++++---
arch/powerpc/kvm/book3s_64_vio.c | 37 ++-
arch/powerpc/platforms/powernv/pci-ioda.c | 255 ++++++++++++++++---
arch/powerpc/platforms/powernv/pci-p5ioc2.c | 4 +-
arch/powerpc/platforms/powernv/pci.c | 64 +++--
arch/powerpc/platforms/powernv/pci.h | 17 +-
arch/powerpc/platforms/pseries/iommu.c | 17 +-
arch/powerpc/sysdev/dart_iommu.c | 1 +
drivers/vfio/vfio_iommu_spapr_tce.c | 365 ++++++++++++++++++++++++----
include/uapi/linux/vfio.h | 37 ++-
13 files changed, 797 insertions(+), 145 deletions(-)
--
2.0.0
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