[libvirt] [PATCH v3 2/2] qemu: add hv_vapic and hv_spinlocks support

Add new CPU flags for HyperV: hv_vapic for virtual APIC support hv_spinlocks for spinlock support XML: <features> <hyperv> <vapic state='on'/> <spinlocks>0xFFFF</spinlocks> </hyperv> </features> results in the following QEMU command line: qemu -cpu <cpu_model>,hv_vapic,hv_spinlocks=0xffff https://bugzilla.redhat.com/show_bug.cgi?id=784836 --- docs/formatdomain.html.in | 17 ++++++++- docs/schemas/domaincommon.rng | 12 +++++++ src/conf/domain_conf.c | 40 ++++++++++++++++++++- src/conf/domain_conf.h | 3 ++ src/qemu/qemu_command.c | 48 ++++++++++++++++++++++++- tests/qemuxml2argvdata/qemuxml2argv-hyperv.args | 2 +- tests/qemuxml2argvdata/qemuxml2argv-hyperv.xml | 2 ++ 7 files changed, 120 insertions(+), 4 deletions(-) diff --git a/docs/formatdomain.html.in b/docs/formatdomain.html.in index 755d084..983e070 100644 --- a/docs/formatdomain.html.in +++ b/docs/formatdomain.html.in @@ -1147,6 +1147,8 @@ &lt;privnet/&gt; &lt;hyperv&gt; &lt;relaxed state='on'/&gt; + &lt;vapic state='on'/&gt; + &lt;spinlocks&gt;0xFFFF&lt;/spinlocks&gt; &lt;/hyperv&gt; &lt;/features&gt; @@ -1197,14 +1199,27 @@ <th>Feature</th> <th>Description</th> <th>Value</th> + <th>Since</th> </tr> <tr> <td>relaxed</td> <td>Relax contstraints on timers</td> <td> on, off</td> + <td><span class="since">1.0.0 (QEMU only)</span></td> + </tr> + <tr> + <td>vapic</td> + <td>Enable virtual APIC</td> + <td>on, off</td> + <td><span class="since">1.0.6 (QEMU only)</span></td> + </tr> + <tr> + <td>spinlocks</td> + <td>Enable spinlock support</td> + <td>hexadecimal number of retries, at least 0xFFF</td> + <td><span class="since">1.0.6 (QEMU only)</span></td> </tr> </table> - <span class="since">Since 1.0.0 (QEMU only)</span> </dd> </dl> diff --git a/docs/schemas/domaincommon.rng b/docs/schemas/domaincommon.rng index 3cace35..ff14f34 100644 --- a/docs/schemas/domaincommon.rng +++ b/docs/schemas/domaincommon.rng @@ -4017,6 +4017,18 @@ <ref name="hypervtristate"/> </element> </optional> + <optional> + <element name="vapic"> + <ref name="hypervtristate"/> + </element> + </optional> + <optional> + <element name="spinlocks"> + <data type="string"> + <param name="pattern">0x[0-9a-fA-F]{0,8}</param> + </data> + </element> + </optional> </interleave> </element> </define> diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c index a16ebd1..3d231a5 100644 --- a/src/conf/domain_conf.c +++ b/src/conf/domain_conf.c @@ -148,7 +148,9 @@ VIR_ENUM_IMPL(virDomainFeatureState, VIR_DOMAIN_FEATURE_STATE_LAST, "off") VIR_ENUM_IMPL(virDomainHyperv, VIR_DOMAIN_HYPERV_LAST, - "relaxed") + "relaxed", + "vapic", + "spinlocks") VIR_ENUM_IMPL(virDomainLifecycle, VIR_DOMAIN_LIFECYCLE_LAST, "destroy", @@ -11061,6 +11063,7 @@ virDomainDefParseXML(xmlDocPtr xml, switch ((enum virDomainHyperv) feature) { case VIR_DOMAIN_HYPERV_RELAXED: + case VIR_DOMAIN_HYPERV_VAPIC: if (!(tmp = virXPathString("string(./@state)", ctxt))) { virReportError(VIR_ERR_XML_ERROR, _("missing 'state' attribute for " @@ -11081,6 +11084,32 @@ virDomainDefParseXML(xmlDocPtr xml, def->hyperv_features[feature] = value; break; + case VIR_DOMAIN_HYPERV_SPINLOCKS: + if (!(tmp = virXPathString("string(.)", ctxt))) { + virReportError(VIR_ERR_XML_ERROR, + _("missing HyperV spinlock retry count")); + goto error; + } + + if (virStrToLong_ui(tmp, NULL, 0, + &def->hyperv_spinlocks) < 0) { + virReportError(VIR_ERR_XML_ERROR, + _("Cannot parse HyperV spinlock retry " + "count")); + goto error; + } + + if (def->hyperv_spinlocks < 0xFFF) { + virReportError(VIR_ERR_XML_ERROR, + _("HyperV spinlock retry count must be " + "at least 0xFFF")); + goto error; + } + VIR_FREE(tmp); + def->hyperv_features[VIR_DOMAIN_HYPERV_SPINLOCKS] = + VIR_DOMAIN_FEATURE_STATE_ON; + break; + case VIR_DOMAIN_HYPERV_LAST: break; } @@ -16175,12 +16204,21 @@ virDomainDefFormatInternal(virDomainDefPtr def, for (i = 0; i < VIR_DOMAIN_HYPERV_LAST; i++) { switch ((enum virDomainHyperv) i) { case VIR_DOMAIN_HYPERV_RELAXED: + case VIR_DOMAIN_HYPERV_VAPIC: if (def->hyperv_features[i]) virBufferAsprintf(buf, " <%s state='%s'/>\n", virDomainHypervTypeToString(i), virDomainFeatureStateTypeToString(def->hyperv_features[i])); break; + case VIR_DOMAIN_HYPERV_SPINLOCKS: + if (def->hyperv_features[i]) + virBufferAsprintf(buf, " <%s>0x%x</%s>\n", + virDomainHypervTypeToString(i), + def->hyperv_spinlocks, + virDomainHypervTypeToString(i)); + break; + case VIR_DOMAIN_HYPERV_LAST: break; } diff --git a/src/conf/domain_conf.h b/src/conf/domain_conf.h index 3a71d6c..cce1189 100644 --- a/src/conf/domain_conf.h +++ b/src/conf/domain_conf.h @@ -1583,6 +1583,8 @@ enum virDomainFeatureState { enum virDomainHyperv { VIR_DOMAIN_HYPERV_RELAXED = 0, + VIR_DOMAIN_HYPERV_VAPIC, + VIR_DOMAIN_HYPERV_SPINLOCKS, VIR_DOMAIN_HYPERV_LAST }; @@ -1920,6 +1922,7 @@ struct _virDomainDef { int apic_eoi; /* These options are of type virDomainFeatureState */ int hyperv_features[VIR_DOMAIN_HYPERV_LAST]; + unsigned int hyperv_spinlocks; virDomainClockDef clock; diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c index 5513e28..b0119d8 100644 --- a/src/qemu/qemu_command.c +++ b/src/qemu/qemu_command.c @@ -5782,11 +5782,18 @@ qemuBuildCpuArgStr(const virQEMUDriverPtr driver, for (i = 0; i < VIR_DOMAIN_HYPERV_LAST; i++) { switch ((enum virDomainHyperv) i) { case VIR_DOMAIN_HYPERV_RELAXED: + case VIR_DOMAIN_HYPERV_VAPIC: if (def->hyperv_features[i] == VIR_DOMAIN_FEATURE_STATE_ON) virBufferAsprintf(&buf, ",hv_%s", virDomainHypervTypeToString(i)); break; + case VIR_DOMAIN_HYPERV_SPINLOCKS: + if (def->hyperv_features[i] == VIR_DOMAIN_FEATURE_STATE_ON) + virBufferAsprintf(&buf,",hv_spinlocks=0x%x", + def->hyperv_spinlocks); + break; + case VIR_DOMAIN_HYPERV_LAST: break; } @@ -9623,6 +9630,7 @@ qemuParseCommandLineCPU(virDomainDefPtr dom, { virCPUDefPtr cpu = NULL; char **tokens; + char **hv_tokens = NULL; char *model = NULL; int ret = -1; int i; @@ -9702,9 +9710,19 @@ qemuParseCommandLineCPU(virDomainDefPtr dom, goto cleanup; } } else if (STRPREFIX(tokens[i], "hv_")) { - const char *feature = tokens[i] + 3; /* "hv_" */ + const char *token = tokens[i] + 3; /* "hv_" */ + const char *feature, *value; int f; + if (*token == '\0') + goto syntax; + + if (!(hv_tokens = virStringSplit(token, "=", 2))) + goto cleanup; + + feature = hv_tokens[0]; + value = hv_tokens[1]; + if (*feature == '\0') goto syntax; @@ -9719,12 +9737,39 @@ qemuParseCommandLineCPU(virDomainDefPtr dom, switch ((enum virDomainHyperv) f) { case VIR_DOMAIN_HYPERV_RELAXED: + case VIR_DOMAIN_HYPERV_VAPIC: + if (value) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, + _("HyperV feature '%s' should not " + "have a value"), feature); + goto cleanup; + } dom->hyperv_features[f] = VIR_DOMAIN_FEATURE_STATE_ON; break; + case VIR_DOMAIN_HYPERV_SPINLOCKS: + dom->hyperv_features[f] = VIR_DOMAIN_FEATURE_STATE_ON; + if (!hv_tokens[1]) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, + _("missing HyperV spinlock retry count")); + goto cleanup; + } + + if (virStrToLong_ui(value, NULL, 0, &dom->hyperv_spinlocks) < 0) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, + _("cannot parse HyperV spinlock retry count")); + goto cleanup; + } + + if (dom->hyperv_spinlocks < 0xFFF) + dom->hyperv_spinlocks = 0xFFF; + break; + case VIR_DOMAIN_HYPERV_LAST: break; } + virStringFreeList(hv_tokens); + hv_tokens = NULL; } } @@ -9752,6 +9797,7 @@ qemuParseCommandLineCPU(virDomainDefPtr dom, cleanup: VIR_FREE(model); virStringFreeList(tokens); + virStringFreeList(hv_tokens); return ret; syntax: diff --git a/tests/qemuxml2argvdata/qemuxml2argv-hyperv.args b/tests/qemuxml2argvdata/qemuxml2argv-hyperv.args index fac4d5f..df6b207 100644 --- a/tests/qemuxml2argvdata/qemuxml2argv-hyperv.args +++ b/tests/qemuxml2argvdata/qemuxml2argv-hyperv.args @@ -1,4 +1,4 @@ LC_ALL=C PATH=/bin HOME=/home/test USER=test LOGNAME=test /usr/bin/qemu -S -M pc \ --cpu qemu32,hv_relaxed -m 214 -smp 6 -nographic -monitor \ +-cpu qemu32,hv_relaxed,hv_vapic,hv_spinlocks=0x2fff -m 214 -smp 6 -nographic -monitor \ unix:/tmp/test-monitor,server,nowait -boot n -usb -net none -serial none \ -parallel none diff --git a/tests/qemuxml2argvdata/qemuxml2argv-hyperv.xml b/tests/qemuxml2argvdata/qemuxml2argv-hyperv.xml index 0d5d0c7..9601645 100644 --- a/tests/qemuxml2argvdata/qemuxml2argv-hyperv.xml +++ b/tests/qemuxml2argvdata/qemuxml2argv-hyperv.xml @@ -12,6 +12,8 @@ <acpi/> <hyperv> <relaxed state='on'/> + <vapic state='on'/> + <spinlocks>0x2fff</spinlocks> </hyperv> </features> <clock offset='utc'/> -- 1.8.1.5