[PATCH v5 0/2] Enable IOMMU support for pseries Secure VMs

Ram Pai
2019-12-07T01:13:10Z

This patch series enables IOMMU support for pseries Secure VMs.

Tested using QEMU command line option:

"-device virtio-scsi-pci,id=scsi0,bus=pci.0,addr=0x4,
iommu_platform=on,disable-modern=off,disable-legacy=on"

and

"-device virtio-blk-pci,scsi=off,bus=pci.0,
addr=0x5,drive=drive-virtio-disk0,id=virtio-disk0,
iommu_platform=on,disable-modern=off,disable-legacy=on"

changelog:
v5: unshare the page used in H_PUT_TCE_INDIRECT hcall to
communicate the TCE entries with the hypervisor.
Concern raised by Alexey. This minimizes the number
of pages shared with the hypervisor.

v4: Corrected the Subject, to include the keyword 'PATCH'.
No other changes.

v3: Better description of 2/2 patch.
Suggested by David Gibson.

v2: added comments describing the changes.
Suggested by Alexey and Michael Ellermen.

Ram Pai (2):
powerpc/pseries/iommu: Share the per-cpu TCE page with the hypervisor.
powerpc/pseries/iommu: Use dma_iommu_ops for Secure VM.

arch/powerpc/platforms/pseries/iommu.c | 43 ++++++++++++++++++++++++----------
1 file changed, 30 insertions(+), 13 deletions(-)

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1.8.3.1