Add a new iotlb attribute to the iommu device to control the device IOTLB support for intel-iommu. https://bugzilla.redhat.com/show_bug.cgi?id=1283251 --- docs/formatdomain.html.in | 10 +++++++ docs/schemas/domaincommon.rng | 5 ++++ src/conf/domain_conf.c | 23 +++++++++++++++- src/conf/domain_conf.h | 1 + .../qemuxml2argv-intel-iommu-device-iotlb.xml | 31 ++++++++++++++++++++++ .../qemuxml2xmlout-intel-iommu-device-iotlb.xml | 1 + tests/qemuxml2xmltest.c | 1 + 7 files changed, 71 insertions(+), 1 deletion(-) create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-intel-iommu-device-iotlb.xml create mode 120000 tests/qemuxml2xmloutdata/qemuxml2xmlout-intel-iommu-device-iotlb.xml diff --git a/docs/formatdomain.html.in b/docs/formatdomain.html.in index 07208ee..fa0edd1 100644 --- a/docs/formatdomain.html.in +++ b/docs/formatdomain.html.in @@ -7449,6 +7449,16 @@ qemu-kvm -net nic,model=? /dev/null <span class="since">Since 3.4.0</span> (QEMU/KVM only) </p> </dd> + <dt><code>iotlb</code></dt> + <dd> + <p> + The <code>iotlb</code> attribute with possible values + <code>on</code> and <code>off</code> can be used to + turn on the IOTLB used to cache address translation + requests from devices. + <span class="since">Since 3.5.0</span> (QEMU/KVM only) + </p> + </dd> </dl> </dd> </dl> diff --git a/docs/schemas/domaincommon.rng b/docs/schemas/domaincommon.rng index 4d9f8d1..5c542c7 100644 --- a/docs/schemas/domaincommon.rng +++ b/docs/schemas/domaincommon.rng @@ -3964,6 +3964,11 @@ <ref name="virOnOff"/> </attribute> </optional> + <optional> + <attribute name="iotlb"> + <ref name="virOnOff"/> + </attribute> + </optional> </element> </optional> </element> diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c index d4ee92e..625449a 100644 --- a/src/conf/domain_conf.c +++ b/src/conf/domain_conf.c @@ -14222,6 +14222,14 @@ virDomainIOMMUDefParseXML(xmlNodePtr node, } iommu->caching_mode = val; } + VIR_FREE(tmp); + if ((tmp = virXPathString("string(./driver/@iotlb)", ctxt))) { + if ((val = virTristateSwitchTypeFromString(tmp)) < 0) { + virReportError(VIR_ERR_XML_ERROR, _("unknown iotlb value: %s"), tmp); + goto cleanup; + } + iommu->iotlb = val; + } VIR_FREE(tmp); if ((tmp = virXPathString("string(./driver/@eim)", ctxt))) { @@ -19950,6 +19958,14 @@ virDomainIOMMUDefCheckABIStability(virDomainIOMMUDefPtr src, virTristateSwitchTypeToString(src->eim)); return false; } + if (src->iotlb != dst->iotlb) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, + _("Target domain IOMMU device iotlb value '%s' " + "does not match source '%s'"), + virTristateSwitchTypeToString(dst->iotlb), + virTristateSwitchTypeToString(src->iotlb)); + return false; + } return true; } @@ -24264,7 +24280,8 @@ virDomainIOMMUDefFormat(virBufferPtr buf, virBufferAdjustIndent(&childBuf, virBufferGetIndent(buf, false) + 2); if (iommu->intremap != VIR_TRISTATE_SWITCH_ABSENT || - iommu->caching_mode != VIR_TRISTATE_SWITCH_ABSENT) { + iommu->caching_mode != VIR_TRISTATE_SWITCH_ABSENT || + iommu->iotlb != VIR_TRISTATE_SWITCH_ABSENT) { virBufferAddLit(&childBuf, "<driver"); if (iommu->intremap != VIR_TRISTATE_SWITCH_ABSENT) { virBufferAsprintf(&childBuf, " intremap='%s'", @@ -24278,6 +24295,10 @@ virDomainIOMMUDefFormat(virBufferPtr buf, virBufferAsprintf(&childBuf, " eim='%s'", virTristateSwitchTypeToString(iommu->eim)); } + if (iommu->iotlb != VIR_TRISTATE_SWITCH_ABSENT) { + virBufferAsprintf(&childBuf, " iotlb='%s'", + virTristateSwitchTypeToString(iommu->iotlb)); + } virBufferAddLit(&childBuf, "/>\n"); } diff --git a/src/conf/domain_conf.h b/src/conf/domain_conf.h index 1231aea..597fb22 100644 --- a/src/conf/domain_conf.h +++ b/src/conf/domain_conf.h @@ -2213,6 +2213,7 @@ struct _virDomainIOMMUDef { virTristateSwitch intremap; virTristateSwitch caching_mode; virTristateSwitch eim; + virTristateSwitch iotlb; }; /* * Guest VM main configuration diff --git a/tests/qemuxml2argvdata/qemuxml2argv-intel-iommu-device-iotlb.xml b/tests/qemuxml2argvdata/qemuxml2argv-intel-iommu-device-iotlb.xml new file mode 100644 index 0000000..3eb08ab --- /dev/null +++ b/tests/qemuxml2argvdata/qemuxml2argv-intel-iommu-device-iotlb.xml @@ -0,0 +1,31 @@ +<domain type='kvm'> + <name>QEMUGuest1</name> + <uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid> + <memory unit='KiB'>219100</memory> + <currentMemory unit='KiB'>219100</currentMemory> + <vcpu placement='static'>1</vcpu> + <os> + <type arch='x86_64' machine='q35'>hvm</type> + <boot dev='hd'/> + </os> + <features> + <ioapic driver='qemu'/> + </features> + <clock offset='utc'/> + <on_poweroff>destroy</on_poweroff> + <on_reboot>restart</on_reboot> + <on_crash>destroy</on_crash> + <devices> + <emulator>/usr/bin/qemu-system-x86_64</emulator> + <controller type='pci' index='0' model='pcie-root'/> + <controller type='sata' index='0'> + <address type='pci' domain='0x0000' bus='0x00' slot='0x1f' function='0x2'/> + </controller> + <input type='mouse' bus='ps2'/> + <input type='keyboard' bus='ps2'/> + <memballoon model='none'/> + <iommu model='intel'> + <driver intremap='on' iotlb='on'/> + </iommu> + </devices> +</domain> diff --git a/tests/qemuxml2xmloutdata/qemuxml2xmlout-intel-iommu-device-iotlb.xml b/tests/qemuxml2xmloutdata/qemuxml2xmlout-intel-iommu-device-iotlb.xml new file mode 120000 index 0000000..3120d9f --- /dev/null +++ b/tests/qemuxml2xmloutdata/qemuxml2xmlout-intel-iommu-device-iotlb.xml @@ -0,0 +1 @@ +../qemuxml2argvdata/qemuxml2argv-intel-iommu-device-iotlb.xml \ No newline at end of file diff --git a/tests/qemuxml2xmltest.c b/tests/qemuxml2xmltest.c index fff13e2..5e8cead 100644 --- a/tests/qemuxml2xmltest.c +++ b/tests/qemuxml2xmltest.c @@ -1128,6 +1128,7 @@ mymain(void) DO_TEST("intel-iommu-ioapic", NONE); DO_TEST("intel-iommu-caching-mode", NONE); DO_TEST("intel-iommu-eim", NONE); + DO_TEST("intel-iommu-device-iotlb", NONE); DO_TEST("cpu-check-none", NONE); DO_TEST("cpu-check-partial", NONE); -- 2.10.2 -- libvir-list mailing list libvir-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/libvir-list
