[libvirt] [PATCH v2 2/3] qemu: vfio-ap device support
Chris Venteicher
cventeic at redhat.com
Fri Oct 26 01:00:56 UTC 2018
Quoting Boris Fiuczynski (2018-10-18 09:54:07)
> Adjusting domain format documentation, adding device address
> support and adding command line generation for vfio-ap.
> Since only one mediated hostdev with model vfio-ap is supported a check
> disallows to define domains with more than one such hostdev device.
>
> Signed-off-by: Boris Fiuczynski <fiuczy at linux.ibm.com>
> Reviewed-by: Bjoern Walk <bwalk at linux.ibm.com>
Reviewed-by: Chris Venteicher <cventeic at redhat.com>
> ---
> docs/formatdomain.html.in | 3 ++-
> docs/schemas/domaincommon.rng | 1 +
> src/conf/domain_conf.c | 28 ++++++++++++++++++++++++++++
> src/qemu/qemu_command.c | 8 ++++++++
> src/qemu/qemu_domain_address.c | 4 ++++
> src/util/virmdev.c | 3 ++-
> src/util/virmdev.h | 1 +
> 7 files changed, 46 insertions(+), 2 deletions(-)
>
> diff --git a/docs/formatdomain.html.in b/docs/formatdomain.html.in
> index 8189959773..269741a690 100644
> --- a/docs/formatdomain.html.in
> +++ b/docs/formatdomain.html.in
> @@ -4616,8 +4616,9 @@
> <dd>For mediated devices (<span class="since">Since 3.2.0</span>)
> the <code>model</code> attribute specifies the device API which
> determines how the host's vfio driver will expose the device to the
> - guest. Currently, <code>model='vfio-pci'</code> and
> + guest. Currently, <code>model='vfio-pci'</code>,
> <code>model='vfio-ccw'</code> (<span class="since">Since 4.4.0</span>)
> + and <code>model='vfio-ap'</code> (<span class="since">Since 4.9.0</span>)
> is supported. <a href="drvnodedev.html#MDEV">MDEV</a> section
> provides more information about mediated devices as well as how to
> create mediated devices on the host.
> diff --git a/docs/schemas/domaincommon.rng b/docs/schemas/domaincommon.rng
> index 099a949cf8..b9ac5df479 100644
> --- a/docs/schemas/domaincommon.rng
> +++ b/docs/schemas/domaincommon.rng
> @@ -4618,6 +4618,7 @@
> <choice>
> <value>vfio-pci</value>
> <value>vfio-ccw</value>
> + <value>vfio-ap</value>
> </choice>
> </attribute>
> <optional>
> diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
> index e8e0adc819..1f8797f997 100644
> --- a/src/conf/domain_conf.c
> +++ b/src/conf/domain_conf.c
> @@ -4275,6 +4275,31 @@ virDomainDefPostParseGraphics(virDomainDef *def)
> }
>
>
> +static int
> +virDomainDefPostParseHostdev(virDomainDefPtr def)
> +{
> + size_t i;
> + bool vfioap_found = false;
> +
> + /* verify settings of hostdevs vfio-ap */
> + for (i = 0; i < def->nhostdevs; i++) {
> + virDomainHostdevDefPtr hostdev = def->hostdevs[i];
> +
> + if (virHostdevIsMdevDevice(hostdev) &&
> + hostdev->source.subsys.u.mdev.model == VIR_MDEV_MODEL_TYPE_VFIO_AP) {
> + if (vfioap_found) {
> + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
> + _("Only one hostdev of model vfio-ap is "
> + "support"));
> + return -1;
> + }
> + vfioap_found = true;
> + }
> + }
> + return 0;
> +}
> +
> +
> /**
> * virDomainDriveAddressIsUsedByDisk:
> * @def: domain definition containing the disks to check
> @@ -5185,6 +5210,9 @@ virDomainDefPostParseCommon(virDomainDefPtr def,
>
> virDomainDefPostParseGraphics(def);
>
> + if (virDomainDefPostParseHostdev(def) < 0)
> + return -1;
> +
> if (virDomainDefPostParseCPU(def) < 0)
> return -1;
>
> diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
> index 1ff593c657..6e3ff67660 100644
> --- a/src/qemu/qemu_command.c
> +++ b/src/qemu/qemu_command.c
> @@ -5476,6 +5476,14 @@ qemuBuildHostdevCommandLine(virCommandPtr cmd,
> return -1;
> }
> break;
> + case VIR_MDEV_MODEL_TYPE_VFIO_AP:
> + if (!virQEMUCapsGet(qemuCaps, QEMU_CAPS_DEVICE_VFIO_AP)) {
> + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
> + _("VFIO AP device assignment is not "
> + "supported by this version of QEMU"));
> + return -1;
> + }
> + break;
> case VIR_MDEV_MODEL_TYPE_LAST:
> default:
> virReportEnumRangeError(virMediatedDeviceModelType,
> diff --git a/src/qemu/qemu_domain_address.c b/src/qemu/qemu_domain_address.c
> index 8a8764cff5..24dd7c1a58 100644
> --- a/src/qemu/qemu_domain_address.c
> +++ b/src/qemu/qemu_domain_address.c
> @@ -294,6 +294,10 @@ qemuDomainPrimeVfioDeviceAddresses(virDomainDefPtr def,
> subsys->u.mdev.model == VIR_MDEV_MODEL_TYPE_VFIO_CCW &&
> def->hostdevs[i]->info->type == VIR_DOMAIN_DEVICE_ADDRESS_TYPE_NONE)
> def->hostdevs[i]->info->type = type;
> +
> + if (virHostdevIsMdevDevice(def->hostdevs[i]) &&
> + subsys->u.mdev.model == VIR_MDEV_MODEL_TYPE_VFIO_AP)
> + def->hostdevs[i]->info->type = VIR_DOMAIN_DEVICE_ADDRESS_TYPE_NONE;
Is there a case where a VFIO_AP hostdev is of a type other than the
default type (value 0) VIR_DOMAIN_DEVICE_ADDRESS_TYPE_NONE such that
this code actually changes the type?
Don't think it's an error but not sure it's actually needed.
> }
> }
>
> diff --git a/src/util/virmdev.c b/src/util/virmdev.c
> index 10a2b08337..3e11e38802 100644
> --- a/src/util/virmdev.c
> +++ b/src/util/virmdev.c
> @@ -48,7 +48,8 @@ struct _virMediatedDeviceList {
>
> VIR_ENUM_IMPL(virMediatedDeviceModel, VIR_MDEV_MODEL_TYPE_LAST,
> "vfio-pci",
> - "vfio-ccw")
> + "vfio-ccw",
> + "vfio-ap")
>
> static virClassPtr virMediatedDeviceListClass;
>
> diff --git a/src/util/virmdev.h b/src/util/virmdev.h
> index 7c93c4d390..c856ff5bdb 100644
> --- a/src/util/virmdev.h
> +++ b/src/util/virmdev.h
> @@ -27,6 +27,7 @@
> typedef enum {
> VIR_MDEV_MODEL_TYPE_VFIO_PCI = 0,
> VIR_MDEV_MODEL_TYPE_VFIO_CCW = 1,
> + VIR_MDEV_MODEL_TYPE_VFIO_AP = 2,
>
> VIR_MDEV_MODEL_TYPE_LAST
> } virMediatedDeviceModelType;
> --
> 2.17.0
>
> --
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