From 2bb15d3f041ec2506012aa701547334af429b915 Mon Sep 17 00:00:00 2001
Message-Id: <2bb15d3f041ec2506012aa701547334af429b915@dist-git>
From: =?UTF-8?q?J=C3=A1n=20Tomko?= <jtomko@redhat.com>
Date: Tue, 16 May 2017 10:44:54 +0200
Subject: [PATCH] conf: add <driver intremap> to <iommu>
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
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Add a new attribute to control interrupt remapping.
https://bugzilla.redhat.com/show_bug.cgi?id=1427005
(cherry picked from commit 2020e2c6f2656ca1aa9032859ccde76185c37c39)
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
---
docs/formatdomain.html.in | 24 +++++++++++++-
docs/schemas/domaincommon.rng | 9 +++++
src/conf/domain_conf.c | 38 +++++++++++++++++++---
src/conf/domain_conf.h | 1 +
.../qemuxml2argv-intel-iommu-ioapic.xml | 4 ++-
5 files changed, 70 insertions(+), 6 deletions(-)
diff --git a/docs/formatdomain.html.in b/docs/formatdomain.html.in
index 869c1f73e..41b8bfb50 100644
--- a/docs/formatdomain.html.in
+++ b/docs/formatdomain.html.in
@@ -7393,7 +7393,9 @@ qemu-kvm -net nic,model=? /dev/null
<pre>
...
<devices>
- <iommu model='intel'/>
+ <iommu model='intel'>
+ <driver intremap='on'/>
+ </iommu>
</devices>
...
</pre>
@@ -7404,6 +7406,26 @@ qemu-kvm -net nic,model=? /dev/null
Currently only the <code>intel</code> model is supported.
</p>
</dd>
+ <dt><code>driver</code></dt>
+ <dd>
+ <p>
+ The <code>driver</code> subelement can be used to configure
+ additional options:
+ </p>
+ <dl>
+ <dt><code>intremap</code></dt>
+ <dd>
+ <p>
+ The <code>intremap</code> attribute with possible values
+ <code>on</code> and <code>off</code> can be used to
+ turn on interrupt remapping, a part of the VT-d functionality.
+ Currently this requires split I/O APIC
+ (<code><ioapic driver='qemu'/></code>).
+ <span class="since">Since 3.4.0</span> (QEMU/KVM only)
+ </p>
+ </dd>
+ </dl>
+ </dd>
</dl>
<h3><a name="seclabel">Security label</a></h3>
diff --git a/docs/schemas/domaincommon.rng b/docs/schemas/domaincommon.rng
index c72ba7e97..a400d961b 100644
--- a/docs/schemas/domaincommon.rng
+++ b/docs/schemas/domaincommon.rng
@@ -3893,6 +3893,15 @@
<attribute name="model">
<value>intel</value>
</attribute>
+ <optional>
+ <element name="driver">
+ <optional>
+ <attribute name="intremap">
+ <ref name="virOnOff"/>
+ </attribute>
+ </optional>
+ </element>
+ </optional>
</element>
</define>
diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
index d5c4f6ddd..45473f65b 100644
--- a/src/conf/domain_conf.c
+++ b/src/conf/domain_conf.c
@@ -14132,12 +14132,16 @@ virDomainMemoryDefParseXML(xmlNodePtr memdevNode,
static virDomainIOMMUDefPtr
-virDomainIOMMUDefParseXML(xmlNodePtr node)
+virDomainIOMMUDefParseXML(xmlNodePtr node,
+ xmlXPathContextPtr ctxt)
{
virDomainIOMMUDefPtr iommu = NULL, ret = NULL;
+ xmlNodePtr save = ctxt->node;
char *tmp = NULL;
int val;
+ ctxt->node = node;
+
if (VIR_ALLOC(iommu) < 0)
goto cleanup;
@@ -14154,10 +14158,20 @@ virDomainIOMMUDefParseXML(xmlNodePtr node)
iommu->model = val;
+ VIR_FREE(tmp);
+ if ((tmp = virXPathString("string(./driver/@intremap)", ctxt))) {
+ if ((val = virTristateSwitchTypeFromString(tmp)) < 0) {
+ virReportError(VIR_ERR_XML_ERROR, _("unknown intremap value: %s"), tmp);
+ goto cleanup;
+ }
+ iommu->intremap = val;
+ }
+
ret = iommu;
iommu = NULL;
cleanup:
+ ctxt->node = save;
VIR_FREE(iommu);
VIR_FREE(tmp);
return ret;
@@ -14310,7 +14324,7 @@ virDomainDeviceDefParse(const char *xmlStr,
goto error;
break;
case VIR_DOMAIN_DEVICE_IOMMU:
- if (!(dev->data.iommu = virDomainIOMMUDefParseXML(node)))
+ if (!(dev->data.iommu = virDomainIOMMUDefParseXML(node, ctxt)))
goto error;
break;
case VIR_DOMAIN_DEVICE_NONE:
@@ -18440,7 +18454,7 @@ virDomainDefParseXML(xmlDocPtr xml,
}
if (n > 0) {
- if (!(def->iommu = virDomainIOMMUDefParseXML(nodes[0])))
+ if (!(def->iommu = virDomainIOMMUDefParseXML(nodes[0], ctxt)))
goto error;
}
VIR_FREE(nodes);
@@ -24096,8 +24110,24 @@ static void
virDomainIOMMUDefFormat(virBufferPtr buf,
const virDomainIOMMUDef *iommu)
{
- virBufferAsprintf(buf, "<iommu model='%s'/>\n",
+ virBuffer childBuf = VIR_BUFFER_INITIALIZER;
+
+ virBufferAdjustIndent(&childBuf, virBufferGetIndent(buf, false) + 2);
+
+ if (iommu->intremap != VIR_TRISTATE_SWITCH_ABSENT) {
+ virBufferAsprintf(&childBuf, "<driver intremap='%s'/>\n",
+ virTristateSwitchTypeToString(iommu->intremap));
+ }
+
+ virBufferAsprintf(buf, "<iommu model='%s'",
virDomainIOMMUModelTypeToString(iommu->model));
+ if (virBufferUse(&childBuf)) {
+ virBufferAddLit(buf, ">\n");
+ virBufferAddBuffer(buf, &childBuf);
+ virBufferAddLit(buf, "</iommu>\n");
+ } else {
+ virBufferAddLit(buf, "/>\n");
+ }
}
diff --git a/src/conf/domain_conf.h b/src/conf/domain_conf.h
index 4cb37b1fc..8eb422a57 100644
--- a/src/conf/domain_conf.h
+++ b/src/conf/domain_conf.h
@@ -2209,6 +2209,7 @@ typedef enum {
struct _virDomainIOMMUDef {
virDomainIOMMUModel model;
+ virTristateSwitch intremap;
};
/*
* Guest VM main configuration
diff --git a/tests/qemuxml2argvdata/qemuxml2argv-intel-iommu-ioapic.xml b/tests/qemuxml2argvdata/qemuxml2argv-intel-iommu-ioapic.xml
index 284d63a30..bfe714ad8 100644
--- a/tests/qemuxml2argvdata/qemuxml2argv-intel-iommu-ioapic.xml
+++ b/tests/qemuxml2argvdata/qemuxml2argv-intel-iommu-ioapic.xml
@@ -24,6 +24,8 @@
<input type='mouse' bus='ps2'/>
<input type='keyboard' bus='ps2'/>
<memballoon model='none'/>
- <iommu model='intel'/>
+ <iommu model='intel'>
+ <driver intremap='on'/>
+ </iommu>
</devices>
</domain>
--
2.13.0