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

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Date:   Fri,  6 Dec 2019 17:12:37 -0800
From:   Ram Pai <linuxram@...ibm.com>
To:     mpe@...erman.id.au
Cc:     linuxppc-dev@...ts.ozlabs.org, benh@...nel.crashing.org,
        david@...son.dropbear.id.au, paulus@...abs.org,
        mdroth@...ux.vnet.ibm.com, hch@....de, linuxram@...ibm.com,
        andmike@...ibm.com, sukadev@...ux.vnet.ibm.com, mst@...hat.com,
        ram.n.pai@...il.com, aik@...abs.ru, cai@....pw, tglx@...utronix.de,
        bauerman@...ux.ibm.com, linux-kernel@...r.kernel.org,
        leonardo@...ux.ibm.com
Subject: [PATCH v5 0/2] Enable IOMMU support for pseries Secure VMs

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(-)

-- 
1.8.3.1