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libvirt
b7d6648d-conf-add-e820-host.patch
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File b7d6648d-conf-add-e820-host.patch of Package libvirt
commit b7d6648d436fe0a99d4faf0f99c88a27a7bfea33 Author: Marek Marczykowski-Górecki <marmarek@invisiblethingslab.com> Date: Tue Apr 14 04:37:04 2020 +0200 conf: add xen specific feature: e820_host e820_host is a Xen-specific option, only available for PV domains, that provides the domain a virtual e820 memory map based on the host one. It is enabled with a new Xen hypervisor feature, e.g. <features> <xen> <e820_host state='on'/> </xen> </features> e820_host is required when using PCI passthrough and is generally considered safe for any PV kernel. e820_host is silently ignored if set in HVM domain configuration. See xl.cfg(5) man page in the Xen documentation for more details. Signed-off-by: Marek Marczykowski-Górecki <marmarek@invisiblethingslab.com> Reviewed-by: Jim Fehlig <jfehlig@suse.com> Index: libvirt-6.0.0/docs/formatdomain.html.in =================================================================== --- libvirt-6.0.0.orig/docs/formatdomain.html.in +++ libvirt-6.0.0/docs/formatdomain.html.in @@ -2053,6 +2053,9 @@ <hidden state='on'/> <hint-dedicated state='on'/> </kvm> + <xen> + <e820_host state='on'/> + </xen> <pvspinlock state='on'/> <gic version='2'/> <ioapic driver='qemu'/> @@ -2234,6 +2237,23 @@ </tr> </table> </dd> + <dt><code>xen</code></dt> + <dd>Various features to change the behavior of the Xen hypervisor. + <table class="top_table"> + <tr> + <th>Feature</th> + <th>Description</th> + <th>Value</th> + <th>Since</th> + </tr> + <tr> + <td>e820_host</td> + <td>Expose the host e820 to the guest (PV only)</td> + <td>on, off</td> + <td><span class="since">6.3.0</span></td> + </tr> + </table> + </dd> <dt><code>pmu</code></dt> <dd>Depending on the <code>state</code> attribute (values <code>on</code>, <code>off</code>, default <code>on</code>) enable or disable the Index: libvirt-6.0.0/docs/schemas/domaincommon.rng =================================================================== --- libvirt-6.0.0.orig/docs/schemas/domaincommon.rng +++ libvirt-6.0.0/docs/schemas/domaincommon.rng @@ -5106,6 +5106,9 @@ <ref name="kvm"/> </optional> <optional> + <ref name="xen"/> + </optional> + <optional> <element name="privnet"> <empty/> </element> @@ -6074,6 +6077,19 @@ <ref name="featurestate"/> </element> </optional> + </interleave> + </element> + </define> + + <!-- Optional Xen features --> + <define name="xen"> + <element name="xen"> + <interleave> + <optional> + <element name="e820_host"> + <ref name="featurestate"/> + </element> + </optional> </interleave> </element> </define> Index: libvirt-6.0.0/src/conf/domain_conf.c =================================================================== --- libvirt-6.0.0.orig/src/conf/domain_conf.c +++ libvirt-6.0.0/src/conf/domain_conf.c @@ -172,6 +172,7 @@ VIR_ENUM_IMPL(virDomainFeature, "nested-hv", "msrs", "ccf-assist", + "xen", ); VIR_ENUM_IMPL(virDomainCapabilitiesPolicy, @@ -205,6 +206,11 @@ VIR_ENUM_IMPL(virDomainKVM, "hint-dedicated", ); +VIR_ENUM_IMPL(virDomainXen, + VIR_DOMAIN_XEN_LAST, + "e820_host" +); + VIR_ENUM_IMPL(virDomainMsrsUnknown, VIR_DOMAIN_MSRS_UNKNOWN_LAST, "ignore", @@ -20349,6 +20355,7 @@ virDomainDefParseXML(xmlDocPtr xml, case VIR_DOMAIN_FEATURE_HYPERV: case VIR_DOMAIN_FEATURE_KVM: case VIR_DOMAIN_FEATURE_MSRS: + case VIR_DOMAIN_FEATURE_XEN: def->features[val] = VIR_TRISTATE_SWITCH_ON; break; @@ -20659,6 +20666,51 @@ virDomainDefParseXML(xmlDocPtr xml, VIR_FREE(nodes); } + if (def->features[VIR_DOMAIN_FEATURE_XEN] == VIR_TRISTATE_SWITCH_ON) { + int feature; + int value; + if ((n = virXPathNodeSet("./features/xen/*", ctxt, &nodes)) < 0) + goto error; + + for (i = 0; i < n; i++) { + feature = virDomainXenTypeFromString((const char *)nodes[i]->name); + if (feature < 0) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, + _("unsupported Xen feature: %s"), + nodes[i]->name); + goto error; + } + + switch ((virDomainXen) feature) { + case VIR_DOMAIN_XEN_E820_HOST: + if (!(tmp = virXMLPropString(nodes[i], "state"))) { + virReportError(VIR_ERR_XML_ERROR, + _("missing 'state' attribute for " + "Xen feature '%s'"), + nodes[i]->name); + goto error; + } + + if ((value = virTristateSwitchTypeFromString(tmp)) < 0) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, + _("invalid value of state argument " + "for Xen feature '%s'"), + nodes[i]->name); + goto error; + } + + VIR_FREE(tmp); + def->xen_features[feature] = value; + break; + + /* coverity[dead_error_begin] */ + case VIR_DOMAIN_XEN_LAST: + break; + } + } + VIR_FREE(nodes); + } + if (def->features[VIR_DOMAIN_FEATURE_SMM] == VIR_TRISTATE_SWITCH_ON) { int rv = virDomainParseScaledValue("string(./features/smm/tseg)", "string(./features/smm/tseg/@unit)", @@ -22651,6 +22703,7 @@ virDomainDefFeaturesCheckABIStability(vi case VIR_DOMAIN_FEATURE_PRIVNET: case VIR_DOMAIN_FEATURE_HYPERV: case VIR_DOMAIN_FEATURE_KVM: + case VIR_DOMAIN_FEATURE_XEN: case VIR_DOMAIN_FEATURE_PVSPINLOCK: case VIR_DOMAIN_FEATURE_PMU: case VIR_DOMAIN_FEATURE_VMPORT: @@ -22822,6 +22875,30 @@ virDomainDefFeaturesCheckABIStability(vi } } + /* xen */ + if (src->features[VIR_DOMAIN_FEATURE_XEN] == VIR_TRISTATE_SWITCH_ON) { + for (i = 0; i < VIR_DOMAIN_XEN_LAST; i++) { + switch ((virDomainXen) i) { + case VIR_DOMAIN_XEN_E820_HOST: + if (src->xen_features[i] != dst->xen_features[i]) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, + _("State of Xen feature '%s' differs: " + "source: '%s', destination: '%s'"), + virDomainXenTypeToString(i), + virTristateSwitchTypeToString(src->xen_features[i]), + virTristateSwitchTypeToString(dst->xen_features[i])); + return false; + } + + break; + + /* coverity[dead_error_begin] */ + case VIR_DOMAIN_XEN_LAST: + break; + } + } + } + /* kvm */ if (src->features[VIR_DOMAIN_FEATURE_KVM] == VIR_TRISTATE_SWITCH_ON) { for (i = 0; i < VIR_DOMAIN_KVM_LAST; i++) { @@ -28304,6 +28381,31 @@ virDomainDefFormatFeatures(virBufferPtr virBufferAddLit(&childBuf, "</kvm>\n"); break; + case VIR_DOMAIN_FEATURE_XEN: + if (def->features[i] != VIR_TRISTATE_SWITCH_ON) + break; + + virBufferAddLit(&childBuf, "<xen>\n"); + virBufferAdjustIndent(&childBuf, 2); + for (j = 0; j < VIR_DOMAIN_XEN_LAST; j++) { + switch ((virDomainXen) j) { + case VIR_DOMAIN_XEN_E820_HOST: + if (def->xen_features[j]) + virBufferAsprintf(&childBuf, "<%s state='%s'/>\n", + virDomainXenTypeToString(j), + virTristateSwitchTypeToString( + def->xen_features[j])); + break; + + /* coverity[dead_error_begin] */ + case VIR_DOMAIN_XEN_LAST: + break; + } + } + virBufferAdjustIndent(&childBuf, -2); + virBufferAddLit(&childBuf, "</xen>\n"); + break; + case VIR_DOMAIN_FEATURE_CAPABILITIES: for (j = 0; j < VIR_DOMAIN_PROCES_CAPS_FEATURE_LAST; j++) { if (def->caps_features[j] != VIR_TRISTATE_SWITCH_ABSENT) Index: libvirt-6.0.0/src/conf/domain_conf.h =================================================================== --- libvirt-6.0.0.orig/src/conf/domain_conf.h +++ libvirt-6.0.0/src/conf/domain_conf.h @@ -1765,6 +1765,7 @@ typedef enum { VIR_DOMAIN_FEATURE_NESTED_HV, VIR_DOMAIN_FEATURE_MSRS, VIR_DOMAIN_FEATURE_CCF_ASSIST, + VIR_DOMAIN_FEATURE_XEN, VIR_DOMAIN_FEATURE_LAST } virDomainFeature; @@ -1811,6 +1812,12 @@ typedef enum { } virDomainMsrsUnknown; typedef enum { + VIR_DOMAIN_XEN_E820_HOST = 0, + + VIR_DOMAIN_XEN_LAST +} virDomainXen; + +typedef enum { VIR_DOMAIN_CAPABILITIES_POLICY_DEFAULT = 0, VIR_DOMAIN_CAPABILITIES_POLICY_ALLOW, VIR_DOMAIN_CAPABILITIES_POLICY_DENY, @@ -2429,6 +2436,7 @@ struct _virDomainDef { int hyperv_features[VIR_DOMAIN_HYPERV_LAST]; int kvm_features[VIR_DOMAIN_KVM_LAST]; int msrs_features[VIR_DOMAIN_MSRS_LAST]; + int xen_features[VIR_DOMAIN_XEN_LAST]; unsigned int hyperv_spinlocks; int hyperv_stimer_direct; virGICVersion gic_version; @@ -3467,6 +3475,7 @@ VIR_ENUM_DECL(virDomainGraphicsSpiceMous VIR_ENUM_DECL(virDomainGraphicsVNCSharePolicy); VIR_ENUM_DECL(virDomainHyperv); VIR_ENUM_DECL(virDomainKVM); +VIR_ENUM_DECL(virDomainXen); VIR_ENUM_DECL(virDomainMsrsUnknown); VIR_ENUM_DECL(virDomainRNGModel); VIR_ENUM_DECL(virDomainRNGBackend);
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