Re: [libvirt] [PATCH 8/9] conf: add caching attribute to iommu device

Add a new attribute to control the caching mode. https://bugzilla.redhat.com/show_bug.cgi?id=1427005 --- docs/formatdomain.html.in | 9 +++++++ docs/schemas/domaincommon.rng | 5 ++++ src/conf/domain_conf.c | 23 +++++++++++++++--- src/conf/domain_conf.h | 1 + .../qemuxml2argv-intel-iommu-caching.xml | 28 ++++++++++++++++++++++ .../qemuxml2xmlout-intel-iommu-caching.xml | 28 ++++++++++++++++++++++ tests/qemuxml2xmltest.c | 2 ++ 7 files changed, 93 insertions(+), 3 deletions(-) create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-intel-iommu-caching.xml create mode 100644 tests/qemuxml2xmloutdata/qemuxml2xmlout-intel-iommu-caching.xml diff --git a/docs/formatdomain.html.in b/docs/formatdomain.html.in index 6b196d4..f3c44ae 100644 --- a/docs/formatdomain.html.in +++ b/docs/formatdomain.html.in @@ -7314,6 +7314,15 @@ qemu-kvm -net nic,model=? /dev/null (QEMU only) </p> </dd> + <dt><code>caching</code></dt> + <dd> + <p> + The <code>caching</code> attribute with possible values + <code>on</code> and <code>off</code> can be used to + turn on the caching mode. <span class="since">Since 3.3.0</span> + (QEMU only) + </p> + </dd>

</dl> </dd> </dl> diff --git a/docs/schemas/domaincommon.rng b/docs/schemas/domaincommon.rng index 68f3680..49adf69 100644 --- a/docs/schemas/domaincommon.rng +++ b/docs/schemas/domaincommon.rng @@ -3896,6 +3896,11 @@ <ref name="virOnOff"/> </attribute> </optional> + <optional> + <attribute name="caching"> + <ref name="virOnOff"/> + </attribute> + </optional> </element> </optional> </element> diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c index da0c9f0..6bcf84e 100644 --- a/src/conf/domain_conf.c +++ b/src/conf/domain_conf.c @@ -13944,6 +13944,15 @@ virDomainIOMMUDefParseXML(xmlNodePtr node, iommu->intremap = val; } + VIR_FREE(tmp); + if ((tmp = virXPathString("string(./driver/@caching)", ctxt))) { + if ((val = virTristateSwitchTypeFromString(tmp)) < 0) { + virReportError(VIR_ERR_XML_ERROR, _("unknown caching value: %s"), tmp); + goto cleanup; + } + iommu->caching = val; + } + ret = iommu; iommu = NULL; @@ -23864,9 +23873,17 @@ virDomainIOMMUDefFormat(virBufferPtr buf, virBufferAdjustIndent(&childBuf, virBufferGetIndent(buf, false) + 2); - if (iommu->intremap) { - virBufferAsprintf(&childBuf, "<driver intremap='%s'/>\n", - virTristateSwitchTypeToString(iommu->intremap)); + if (iommu->intremap || iommu->caching) {

+ virBufferAddLit(&childBuf, "<driver"); + if (iommu->intremap) { + virBufferAsprintf(&childBuf, " intremap='%s'", + virTristateSwitchTypeToString(iommu->intremap)); + } + if (iommu->caching) { + virBufferAsprintf(&childBuf, " caching='%s'", + virTristateSwitchTypeToString(iommu->caching)); + } + virBufferAddLit(&childBuf, "/>\n"); } virBufferAsprintf(buf, "<iommu model='%s'", diff --git a/src/conf/domain_conf.h b/src/conf/domain_conf.h index ad8ae2d..af63b51 100644 --- a/src/conf/domain_conf.h +++ b/src/conf/domain_conf.h @@ -2204,6 +2204,7 @@ typedef enum { struct _virDomainIOMMUDef { virDomainIOMMUModel model; virTristateSwitch intremap; + virTristateSwitch caching; }; /* * Guest VM main configuration diff --git a/tests/qemuxml2argvdata/qemuxml2argv-intel-iommu-caching.xml b/tests/qemuxml2argvdata/qemuxml2argv-intel-iommu-caching.xml new file mode 100644 index 0000000..b3ce6b4 --- /dev/null +++ b/tests/qemuxml2argvdata/qemuxml2argv-intel-iommu-caching.xml @@ -0,0 +1,28 @@ +<domain type='qemu'> + <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> + <clock offset='utc'/> + <on_poweroff>destroy</on_poweroff> + <on_reboot>restart</on_reboot> + <on_crash>destroy</on_crash> + <devices> + <emulator>/usr/bin/qemu</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' caching='on'/>

+ </iommu> + </devices> +</domain> diff --git a/tests/qemuxml2xmloutdata/qemuxml2xmlout-intel-iommu-caching.xml b/tests/qemuxml2xmloutdata/qemuxml2xmlout-intel-iommu-caching.xml new file mode 100644 index 0000000..b3ce6b4

--- /dev/null +++ b/tests/qemuxml2xmloutdata/qemuxml2xmlout-intel-iommu-caching.xml @@ -0,0 +1,28 @@ +<domain type='qemu'> + <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> + <clock offset='utc'/> + <on_poweroff>destroy</on_poweroff> + <on_reboot>restart</on_reboot> + <on_crash>destroy</on_crash> + <devices> + <emulator>/usr/bin/qemu</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' caching='on'/> + </iommu> + </devices> +</domain> diff --git a/tests/qemuxml2xmltest.c b/tests/qemuxml2xmltest.c index 8afd830..20add1b 100644 --- a/tests/qemuxml2xmltest.c +++ b/tests/qemuxml2xmltest.c @@ -1126,6 +1126,8 @@ mymain(void) QEMU_CAPS_MACHINE_IOMMU); DO_TEST("intel-iommu-irqchip", QEMU_CAPS_DEVICE_INTEL_IOMMU); + DO_TEST("intel-iommu-caching", + QEMU_CAPS_DEVICE_INTEL_IOMMU); DO_TEST("cpu-check-none", NONE); DO_TEST("cpu-check-partial", NONE);