Re: [PATCH v2] eal: sPAPR IOMMU support in pci probing for vfio-pci in ppc64le

From: Gowrishankar Muthukrishnan <redacted>

Below changes adds pci probing support for vfio-pci devices in power8.

Changes:
v2 - kernel version checked and doc updated

Signed-off-by: Gowrishankar Muthukrishnan
[off-list ref]
---
 doc/guides/rel_notes/release_17_05.rst |  4 ++
 lib/librte_eal/linuxapp/eal/eal_vfio.c | 90
++++++++++++++++++++++++++++++++++
 lib/librte_eal/linuxapp/eal/eal_vfio.h |  6 +++
 3 files changed, 100 insertions(+)

diff --git a/doc/guides/rel_notes/release_17_05.rst

b/doc/guides/rel_notes/release_17_05.rst
index e25ea9f..4b90036 100644

--- a/doc/guides/rel_notes/release_17_05.rst
+++ b/doc/guides/rel_notes/release_17_05.rst

@@ -42,6 +42,10 @@ New Features

=========================================================


+* **Added powerpc support in pci probing for vfio-pci devices.**
+
+  sPAPR IOMMU based pci probing enabled for vfio-pci devices.
+
 Resolved Issues
 ---------------

diff --git a/lib/librte_eal/linuxapp/eal/eal_vfio.c

b/lib/librte_eal/linuxapp/eal/eal_vfio.c
index 702f7a2..9377a66 100644

--- a/lib/librte_eal/linuxapp/eal/eal_vfio.c
+++ b/lib/librte_eal/linuxapp/eal/eal_vfio.c

@@ -50,12 +50,15 @@
 static struct vfio_config vfio_cfg;

 static int vfio_type1_dma_map(int);
+static int vfio_spapr_dma_map(int);
 static int vfio_noiommu_dma_map(int);

 /* IOMMU types we support */
 static const struct vfio_iommu_type iommu_types[] = {
 	/* x86 IOMMU, otherwise known as type 1 */
 	{ RTE_VFIO_TYPE1, "Type 1", &vfio_type1_dma_map},
+	/* ppc64 IOMMU, otherwise known as spapr */
+	{ RTE_VFIO_SPAPR, "sPAPR", &vfio_spapr_dma_map},
 	/* IOMMU-less mode */
 	{ RTE_VFIO_NOIOMMU, "No-IOMMU",

&vfio_noiommu_dma_map},
 };

@@ -540,6 +543,93 @@ int vfio_setup_device(const char *sysfs_base, const

char *dev_addr,
 }

 static int
+vfio_spapr_dma_map(int vfio_container_fd)
+{
+	const struct rte_memseg *ms = rte_eal_get_physmem_layout();
+	int i, ret;
+
+	struct vfio_iommu_spapr_register_memory reg = {
+		.argsz = sizeof(reg),
+		.flags = 0
+	};
+	struct vfio_iommu_spapr_tce_info info = {
+		.argsz = sizeof(info),
+	};
+	struct vfio_iommu_spapr_tce_create create = {
+		.argsz = sizeof(create),
+	};
+	struct vfio_iommu_spapr_tce_remove remove = {
+		.argsz = sizeof(remove),
+	};
+
+	/* query spapr iommu info */
+	ret = ioctl(vfio_container_fd, VFIO_IOMMU_SPAPR_TCE_GET_INFO,