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From: Ram Pai <linuxram@us.ibm.com>
To: linuxppc-dev@lists.ozlabs.org
Cc: andmike@us.ibm.com, mst@redhat.com, aik@ozlabs.ru,
	linuxram@us.ibm.com, mdroth@linux.vnet.ibm.com,
	linux-kernel@vger.kernel.org, ram.n.pai@gmail.com, cai@lca.pw,
	tglx@linutronix.de, sukadev@linux.vnet.ibm.com, hch@lst.de,
	bauerman@linux.ibm.com, david@gibson.dropbear.id.au
Subject: [RFC v1 2/2] powerpc/pseries/iommu: Use dma_iommu_ops for Secure VMs aswell.
Date: Mon,  4 Nov 2019 13:28:43 -0800
Message-ID: <1572902923-8096-3-git-send-email-linuxram@us.ibm.com> (raw)
In-Reply-To: <1572902923-8096-2-git-send-email-linuxram@us.ibm.com>

This enables IOMMU support for pseries Secure VMs.

Signed-off-by: Ram Pai <linuxram@us.ibm.com>
---
 arch/powerpc/platforms/pseries/iommu.c | 10 +---------
 1 file changed, 1 insertion(+), 9 deletions(-)

diff --git a/arch/powerpc/platforms/pseries/iommu.c b/arch/powerpc/platforms/pseries/iommu.c
index 07f0847..189717b 100644
--- a/arch/powerpc/platforms/pseries/iommu.c
+++ b/arch/powerpc/platforms/pseries/iommu.c
@@ -1333,15 +1333,7 @@ void iommu_init_early_pSeries(void)
 	of_reconfig_notifier_register(&iommu_reconfig_nb);
 	register_memory_notifier(&iommu_mem_nb);
 
-	/*
-	 * Secure guest memory is inacessible to devices so regular DMA isn't
-	 * possible.
-	 *
-	 * In that case keep devices' dma_map_ops as NULL so that the generic
-	 * DMA code path will use SWIOTLB to bounce buffers for DMA.
-	 */
-	if (!is_secure_guest())
-		set_pci_dma_ops(&dma_iommu_ops);
+	set_pci_dma_ops(&dma_iommu_ops);
 }
 
 static int __init disable_multitce(char *str)
-- 
1.8.3.1


  reply index

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-11-04 21:28 [RFC v1 0/2] Enable IOMMU support for pseries Secure VMs Ram Pai
2019-11-04 21:28 ` [RFC v1 1/2] powerpc/pseries/iommu: Share the per-cpu TCE page with the hypervisor Ram Pai
2019-11-04 21:28   ` Ram Pai [this message]
2019-11-07 10:26     ` [RFC v1 2/2] powerpc/pseries/iommu: Use dma_iommu_ops for Secure VMs aswell Michael Ellerman
2019-11-08  5:49       ` Ram Pai
2019-11-06  1:58   ` [RFC v1 1/2] powerpc/pseries/iommu: Share the per-cpu TCE page with the hypervisor Alexey Kardashevskiy
2019-11-06 17:01     ` Ram Pai
2019-11-07  5:58       ` Alexey Kardashevskiy
2019-11-07 10:29   ` Michael Ellerman
2019-11-08  6:05     ` Ram Pai
2019-11-06  1:59 ` [RFC v1 0/2] Enable IOMMU support for pseries Secure VMs Alexey Kardashevskiy
2019-11-06 16:46   ` Ram Pai
2019-11-06 18:06   ` Michael S. Tsirkin
2019-11-06 18:52     ` Michael Roth
2019-11-06 22:22       ` Ram Pai
2019-11-07  6:01     ` Alexey Kardashevskiy

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