Introduce the 'msrs' feature element that controls Model Specific
Registers related behaviour. At this moment it allows only
single tunable attribute "unknown":
<msrs unknown='ignore|fault'/>
Which tells hypervisor to ignore accesses to unimplemented
Model Specific Registers. The only user of that for now is going
to be the bhyve driver.
Signed-off-by: Roman Bogorodskiy <bogorodskiy@xxxxxxxxx>
---
docs/formatdomain.html.in | 1 +
docs/schemas/domaincommon.rng | 14 +++++++++++++
src/conf/domain_conf.c | 38 +++++++++++++++++++++++++++++++++++
src/conf/domain_conf.h | 16 +++++++++++++++
src/qemu/qemu_domain.c | 1 +
5 files changed, 70 insertions(+)
diff --git a/docs/formatdomain.html.in b/docs/formatdomain.html.in
index 2ae5006849..5b03812b16 100644
--- a/docs/formatdomain.html.in
+++ b/docs/formatdomain.html.in
@@ -2010,6 +2010,7 @@
<tlbflush state='on'/>
<ipi state='on'/>
<evmcs state='on'/>
+ <msrs unknown='ignore'/>
</hyperv>
<kvm>
<hidden state='on'/>
diff --git a/docs/schemas/domaincommon.rng b/docs/schemas/domaincommon.rng
index ba80440c72..5345e54342 100644
--- a/docs/schemas/domaincommon.rng
+++ b/docs/schemas/domaincommon.rng
@@ -4997,6 +4997,9 @@
<ref name="featurestate"/>
</element>
</optional>
+ <optional>
+ <ref name="msrs"/>
+ </optional>
</interleave>
</element>
</optional>
@@ -5245,6 +5248,17 @@
</element>
</define>
+ <define name="msrs">
+ <element name="msrs">
+ <attribute name="unknown">
+ <choice>
+ <value>ignore</value>
+ <value>fault</value>
+ </choice>
+ </attribute>
+ </element>
+ </define>
+
<define name="address">
<element name="address">
<choice>
diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
index 6772c327ed..a3c43037d7 100644
--- a/src/conf/domain_conf.c
+++ b/src/conf/domain_conf.c
@@ -157,6 +157,7 @@ VIR_ENUM_IMPL(virDomainFeature, VIR_DOMAIN_FEATURE_LAST,
"vmcoreinfo",
"htm",
"nested-hv",
+ "msrs",
);
VIR_ENUM_IMPL(virDomainCapabilitiesPolicy, VIR_DOMAIN_CAPABILITIES_POLICY_LAST,
@@ -186,6 +187,11 @@ VIR_ENUM_IMPL(virDomainKVM, VIR_DOMAIN_KVM_LAST,
"hidden",
);
+VIR_ENUM_IMPL(virDomainMsrsUnknown, VIR_DOMAIN_MSRS_UNKNOWN_LAST,
+ "ignore",
+ "fault",
+);
+
VIR_ENUM_IMPL(virDomainCapsFeature, VIR_DOMAIN_CAPS_FEATURE_LAST,
"audit_control",
"audit_write",
@@ -20330,6 +20336,7 @@ virDomainDefParseXML(xmlDocPtr xml,
case VIR_DOMAIN_FEATURE_PRIVNET:
case VIR_DOMAIN_FEATURE_HYPERV:
case VIR_DOMAIN_FEATURE_KVM:
+ case VIR_DOMAIN_FEATURE_MSRS:
def->features[val] = VIR_TRISTATE_SWITCH_ON;
break;
@@ -20618,6 +20625,26 @@ virDomainDefParseXML(xmlDocPtr xml,
def->tseg_specified = rv;
}
+ if (def->features[VIR_DOMAIN_FEATURE_MSRS] == VIR_TRISTATE_SWITCH_ON) {
+ if ((node = virXPathNode("./features/msrs", ctxt)) == NULL)
+ goto error;
+
+ if (!(tmp = virXMLPropString(node, "unknown"))) {
+ virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
+ _("missing 'unknown' attribute for feature '%s'"),
+ virDomainFeatureTypeToString(VIR_DOMAIN_FEATURE_MSRS));
+ goto error;
+ }
+
+ if ((def->msrs_features[VIR_DOMAIN_MSRS_UNKNOWN] = virDomainMsrsUnknownTypeFromString(tmp)) < 0) {
+ virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
+ _("unknown 'unknown' value '%s'"),
+ tmp);
+ goto error;
+ }
+ VIR_FREE(tmp);
+ }
+
if ((n = virXPathNodeSet("./features/capabilities/*", ctxt, &nodes)) < 0)
goto error;
@@ -22678,6 +22705,9 @@ virDomainDefFeaturesCheckABIStability(virDomainDefPtr src,
}
break;
+ case VIR_DOMAIN_FEATURE_MSRS:
+ break;
+
case VIR_DOMAIN_FEATURE_LAST:
break;
}
@@ -28735,6 +28765,14 @@ virDomainDefFormatInternal(virDomainDefPtr def,
}
break;
+ case VIR_DOMAIN_FEATURE_MSRS:
+ if (def->features[i] != VIR_TRISTATE_SWITCH_ON)
+ break;
+
+ virBufferAsprintf(buf, "<msrs unknown='%s'/>\n",
+ virDomainMsrsUnknownTypeToString(def->msrs_features[VIR_DOMAIN_MSRS_UNKNOWN]));
+ break;
+
/* coverity[dead_error_begin] */
case VIR_DOMAIN_FEATURE_LAST:
break;
diff --git a/src/conf/domain_conf.h b/src/conf/domain_conf.h
index 2bc3f879f7..21357cc7d2 100644
--- a/src/conf/domain_conf.h
+++ b/src/conf/domain_conf.h
@@ -1782,6 +1782,7 @@ typedef enum {
VIR_DOMAIN_FEATURE_VMCOREINFO,
VIR_DOMAIN_FEATURE_HTM,
VIR_DOMAIN_FEATURE_NESTED_HV,
+ VIR_DOMAIN_FEATURE_MSRS,
VIR_DOMAIN_FEATURE_LAST
} virDomainFeature;
@@ -1813,6 +1814,19 @@ typedef enum {
VIR_DOMAIN_KVM_LAST
} virDomainKVM;
+typedef enum {
+ VIR_DOMAIN_MSRS_UNKNOWN = 0,
+
+ VIR_DOMAIN_MSRS_LAST
+} virDomainMsrs;
+
+typedef enum {
+ VIR_DOMAIN_MSRS_UNKNOWN_IGNORE = 0,
+ VIR_DOMAIN_MSRS_UNKNOWN_FAULT,
+
+ VIR_DOMAIN_MSRS_UNKNOWN_LAST
+} virDomainMsrsUnknown;
+
typedef enum {
VIR_DOMAIN_CAPABILITIES_POLICY_DEFAULT = 0,
VIR_DOMAIN_CAPABILITIES_POLICY_ALLOW,
@@ -2466,6 +2480,7 @@ struct _virDomainDef {
int caps_features[VIR_DOMAIN_CAPS_FEATURE_LAST];
int hyperv_features[VIR_DOMAIN_HYPERV_LAST];
int kvm_features[VIR_DOMAIN_KVM_LAST];
+ int msrs_features[VIR_DOMAIN_MSRS_LAST];
unsigned int hyperv_spinlocks;
virGICVersion gic_version;
virDomainHPTResizing hpt_resizing;
@@ -3468,6 +3483,7 @@ VIR_ENUM_DECL(virDomainGraphicsSpiceMouseMode);
VIR_ENUM_DECL(virDomainGraphicsVNCSharePolicy);
VIR_ENUM_DECL(virDomainHyperv);
VIR_ENUM_DECL(virDomainKVM);
+VIR_ENUM_DECL(virDomainMsrsUnknown);
VIR_ENUM_DECL(virDomainRNGModel);
VIR_ENUM_DECL(virDomainRNGBackend);
VIR_ENUM_DECL(virDomainTPMModel);
diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c
index 801d25a44b..d96bf24ae1 100644
--- a/src/qemu/qemu_domain.c
+++ b/src/qemu/qemu_domain.c
@@ -4033,6 +4033,7 @@ qemuDomainDefValidateFeatures(const virDomainDef *def,
case VIR_DOMAIN_FEATURE_PMU:
case VIR_DOMAIN_FEATURE_VMPORT:
case VIR_DOMAIN_FEATURE_VMCOREINFO:
+ case VIR_DOMAIN_FEATURE_MSRS:
case VIR_DOMAIN_FEATURE_LAST:
break;
}
--
2.20.1
