mbox series

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

Message ID 1575681159-30356-1-git-send-email-linuxram@us.ibm.com (mailing list archive)
Headers show
Series Enable IOMMU support for pseries Secure VMs | expand

Message

Ram Pai Dec. 7, 2019, 1:12 a.m. UTC 
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(-)