Re: [libvirt] [PATCH v4 5/6] nodedev: Introduce mdev capability for mediated devices

Start discovering the mediated devices on the host system and format the attributes for the mediated device into the XML. Compared to the parent device which reports generic information about the abstract mediated devices types, a child device only reports the type name it has been instantiated from and the IOMMU group number, since that's device specific compared to the rest of the info that can be gathered about mediated devices at the moment. This patch introduces both the formatting and parsing routines, updates nodedev.rng schema, adding a testcase as well. The resulting mdev child device XML: <device> <name>mdev_4b20d080_1b54_4048_85b3_a6a62d165c01</name> <path>/sys/devices/.../4b20d080-1b54-4048-85b3-a6a62d165c01</path> <parent>pci_0000_06_00_0</parent> <driver> <name>vfio_mdev</name> </driver> <capability type='mdev'> <type id='vendor_supplied_type_id'/> <iommuGroup number='NUM'/> <capability/> <device/> Signed-off-by: Erik Skultety <eskultet(a)redhat.com&gt; --- docs/schemas/nodedev.rng | 17 +++++++++ src/conf/node_device_conf.c | 41 +++++++++++++++++++++ src/conf/node_device_conf.h | 8 ++++ src/node_device/node_device_udev.c | 43 +++++++++++++++++++++- .../mdev_3627463d_b7f0_4fea_b468_f1da537d301b.xml | 8 ++++ tests/nodedevxml2xmltest.c | 1 + 6 files changed, 117 insertions(+), 1 deletion(-) create mode 100644 tests/nodedevschemadata/mdev_3627463d_b7f0_4fea_b468_f1da537d301b.xml

diff --git a/src/conf/node_device_conf.c b/src/conf/node_device_conf.c index f26b1ffc7..bdb6c9cf7 100644 --- a/src/conf/node_device_conf.c +++ b/src/conf/node_device_conf.c @@ -577,6 +577,10 @@ virNodeDeviceDefFormat(const virNodeDeviceDef *def) virBufferEscapeString(&buf, "<type>%s</type>\n", virNodeDevDRMTypeToString(data->drm.type)); break; case VIR_NODE_DEV_CAP_MDEV: + virBufferEscapeString(&buf, "<type id='%s'/>\n", data->mdev.type); + virBufferAsprintf(&buf, "<iommuGroup number='%u'/>\n", + data->mdev.iommuGroupNumber); + break; case VIR_NODE_DEV_CAP_MDEV_TYPES: case VIR_NODE_DEV_CAP_FC_HOST: case VIR_NODE_DEV_CAP_VPORTS: @@ -1643,6 +1647,39 @@ virNodeDevCapSystemParseXML(xmlXPathContextPtr ctxt, } +static int +virNodeDevCapMdevParseXML(xmlXPathContextPtr ctxt, + virNodeDeviceDefPtr def, + xmlNodePtr node, + virNodeDevCapMdevPtr mdev) +{ + xmlNodePtr orignode; + int ret = -1; + + orignode = ctxt->node; + ctxt->node = node; + + if (!(mdev->type = virXPathString("string(./type[1]/@id)", ctxt))) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, + _("missing type id attribute for '%s'"), def->name); + goto out; + } + + if (virNodeDevCapsDefParseULong("number(./iommuGroup[1]/@number)", ctxt, + &mdev->iommuGroupNumber, def, + _("missing iommuGroup number atribute for "

+ "'%s'"), + _("invalid iommuGroup number attribute for " + "'%s'")) < 0) + goto out; + + ret = 0; + out: + ctxt->node = orignode; + return ret; +} + +