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libvirt/0012-qemu-Support-virtio-mmio-transport-for-virtio-on-ARM.patch

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From cd745209fc0b4a433ae7127bab616373e91a8a22 Mon Sep 17 00:00:00 2001
From: Cole Robinson <crobinso@redhat.com>
Date: Wed, 31 Jul 2013 21:40:35 -0400
Subject: [PATCH] qemu: Support virtio-mmio transport for virtio on ARM
Starting with qemu 1.6, the qemu-system-arm vexpress-a9 model has a
hardcoded virtio-mmio transport which enables attaching all virtio
devices.
On the command line, we have to use virtio-XXX-device rather than
virtio-XXX-pci, thankfully s390 already set the precedent here so
it's fairly straight forward.
At the XML level, this adds a new device address type virtio-mmio.
The controller and addressing don't have any subelements at the
moment because we they aren't needed for this usecase, but could
be added later if needed.
Add a test case for an ARM guest with one of every virtio device
enabled.
---
src/conf/domain_conf.c | 12 +++-
src/conf/domain_conf.h | 1 +
src/qemu/qemu_capabilities.c | 16 ++++--
src/qemu/qemu_capabilities.h | 1 +
src/qemu/qemu_command.c | 65 +++++++++++++++++-----
.../qemuxml2argv-arm-vexpressa9-virtio.args | 14 +++++
.../qemuxml2argv-arm-vexpressa9-virtio.xml | 45 +++++++++++++++
tests/qemuxml2argvtest.c | 4 ++
8 files changed, 137 insertions(+), 21 deletions(-)
create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-arm-vexpressa9-virtio.args
create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-arm-vexpressa9-virtio.xml
diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
index 5485d86..73e5af4 100644
--- a/src/conf/domain_conf.c
+++ b/src/conf/domain_conf.c
@@ -210,7 +210,8 @@ VIR_ENUM_IMPL(virDomainDeviceAddress, VIR_DOMAIN_DEVICE_ADDRESS_TYPE_LAST,
"usb",
"spapr-vio",
"virtio-s390",
- "ccw")
+ "ccw",
+ "virtio-mmio")
VIR_ENUM_IMPL(virDomainDisk, VIR_DOMAIN_DISK_TYPE_LAST,
"block",
@@ -2386,6 +2387,7 @@ int virDomainDeviceAddressIsValid(virDomainDeviceInfoPtr info,
return 1;
case VIR_DOMAIN_DEVICE_ADDRESS_TYPE_VIRTIO_S390:
+ case VIR_DOMAIN_DEVICE_ADDRESS_TYPE_VIRTIO_MMIO:
return 1;
case VIR_DOMAIN_DEVICE_ADDRESS_TYPE_CCW:
@@ -3027,6 +3029,9 @@ virDomainDeviceInfoFormat(virBufferPtr buf,
info->addr.ccw.devno);
break;
+ case VIR_DOMAIN_DEVICE_ADDRESS_TYPE_VIRTIO_MMIO:
+ break;
+
default:
virReportError(VIR_ERR_INTERNAL_ERROR,
_("unknown address type '%d'"), info->type);
@@ -3491,6 +3496,9 @@ virDomainDeviceInfoParseXML(xmlNodePtr node,
goto cleanup;
break;
+ case VIR_DOMAIN_DEVICE_ADDRESS_TYPE_VIRTIO_MMIO:
+ break;
+
default:
/* Should not happen */
virReportError(VIR_ERR_INTERNAL_ERROR,
@@ -5738,6 +5746,7 @@ virDomainControllerDefParseXML(xmlNodePtr node,
def->info.type != VIR_DOMAIN_DEVICE_ADDRESS_TYPE_SPAPRVIO &&
def->info.type != VIR_DOMAIN_DEVICE_ADDRESS_TYPE_CCW &&
def->info.type != VIR_DOMAIN_DEVICE_ADDRESS_TYPE_VIRTIO_S390 &&
+ def->info.type != VIR_DOMAIN_DEVICE_ADDRESS_TYPE_VIRTIO_MMIO &&
def->info.type != VIR_DOMAIN_DEVICE_ADDRESS_TYPE_PCI) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("Controllers must use the 'pci' address type"));
@@ -6349,6 +6358,7 @@ virDomainNetDefParseXML(virDomainXMLOptionPtr xmlopt,
def->info.type != VIR_DOMAIN_DEVICE_ADDRESS_TYPE_SPAPRVIO &&
def->info.type != VIR_DOMAIN_DEVICE_ADDRESS_TYPE_CCW &&
def->info.type != VIR_DOMAIN_DEVICE_ADDRESS_TYPE_VIRTIO_S390 &&
+ def->info.type != VIR_DOMAIN_DEVICE_ADDRESS_TYPE_VIRTIO_MMIO &&
def->info.type != VIR_DOMAIN_DEVICE_ADDRESS_TYPE_PCI) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("Network interfaces must use 'pci' address type"));
diff --git a/src/conf/domain_conf.h b/src/conf/domain_conf.h
index cf075e1..f0344ac 100644
--- a/src/conf/domain_conf.h
+++ b/src/conf/domain_conf.h
@@ -207,6 +207,7 @@ enum virDomainDeviceAddressType {
VIR_DOMAIN_DEVICE_ADDRESS_TYPE_SPAPRVIO,
VIR_DOMAIN_DEVICE_ADDRESS_TYPE_VIRTIO_S390,
VIR_DOMAIN_DEVICE_ADDRESS_TYPE_CCW,
+ VIR_DOMAIN_DEVICE_ADDRESS_TYPE_VIRTIO_MMIO,
VIR_DOMAIN_DEVICE_ADDRESS_TYPE_LAST
};
diff --git a/src/qemu/qemu_capabilities.c b/src/qemu/qemu_capabilities.c
index 5c8316f..c4c6fbd 100644
--- a/src/qemu/qemu_capabilities.c
+++ b/src/qemu/qemu_capabilities.c
@@ -234,6 +234,7 @@ VIR_ENUM_IMPL(virQEMUCaps, QEMU_CAPS_LAST,
"vnc-share-policy", /* 150 */
"device-del-event",
+ "virtio-mmio",
);
struct _virQEMUCaps {
@@ -1381,6 +1382,7 @@ struct virQEMUCapsStringFlags virQEMUCapsObjectTypes[] = {
{ "pci-bridge", QEMU_CAPS_DEVICE_PCI_BRIDGE },
{ "vfio-pci", QEMU_CAPS_DEVICE_VFIO_PCI },
{ "scsi-generic", QEMU_CAPS_DEVICE_SCSI_GENERIC },
+ { "virtio-mmio", QEMU_CAPS_DEVICE_VIRTIO_MMIO },
};
static struct virQEMUCapsStringFlags virQEMUCapsObjectPropsVirtioBlk[] = {
@@ -2814,17 +2816,19 @@ virQEMUCapsUsedQMP(virQEMUCapsPtr qemuCaps)
bool
virQEMUCapsSupportsChardev(virDomainDefPtr def,
virQEMUCapsPtr qemuCaps,
- virDomainChrDefPtr chr ATTRIBUTE_UNUSED)
+ virDomainChrDefPtr chr)
{
if (!virQEMUCapsGet(qemuCaps, QEMU_CAPS_CHARDEV) ||
!virQEMUCapsGet(qemuCaps, QEMU_CAPS_DEVICE))
return false;
- /* This may not be true for all ARM machine types, but at least
- * the only supported serial devices of vexpress and versatile
- * don't have the -chardev property wired up. */
if (def->os.arch != VIR_ARCH_ARMV7L)
- return false;
+ return true;
- return true;
+ /* This may not be true for all ARM machine types, but at least
+ * the only supported non-virtio serial devices of vexpress and versatile
+ * don't have the -chardev property wired up. */
+ return (chr->info.type == VIR_DOMAIN_DEVICE_ADDRESS_TYPE_VIRTIO_MMIO ||
+ (chr->deviceType == VIR_DOMAIN_CHR_DEVICE_TYPE_CONSOLE &&
+ chr->targetType == VIR_DOMAIN_CHR_CONSOLE_TARGET_TYPE_VIRTIO));
}
diff --git a/src/qemu/qemu_capabilities.h b/src/qemu/qemu_capabilities.h
index 56f8405..fdb61b0 100644
--- a/src/qemu/qemu_capabilities.h
+++ b/src/qemu/qemu_capabilities.h
@@ -190,6 +190,7 @@ enum virQEMUCapsFlags {
QEMU_CAPS_MLOCK = 149, /* -realtime mlock=on|off */
QEMU_CAPS_VNC_SHARE_POLICY = 150, /* set display sharing policy */
QEMU_CAPS_DEVICE_DEL_EVENT = 151, /* DEVICE_DELETED event */
+ QEMU_CAPS_DEVICE_VIRTIO_MMIO = 152, /* -device virtio-mmio */
QEMU_CAPS_LAST, /* this must always be the last item */
};
diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
index 1d57ccc..360be4e 100644
--- a/src/qemu/qemu_command.c
+++ b/src/qemu/qemu_command.c
@@ -418,22 +418,27 @@ cleanup:
}
static bool
-qemuDomainSupportsNicdev(virDomainDefPtr def, virQEMUCapsPtr qemuCaps)
+qemuDomainSupportsNicdev(virDomainDefPtr def,
+ virQEMUCapsPtr qemuCaps,
+ virDomainNetDefPtr net)
{
if (!virQEMUCapsGet(qemuCaps, QEMU_CAPS_DEVICE))
return false;
- /* arm boards require legacy -net nic */
- if (def->os.arch == VIR_ARCH_ARMV7L)
+ /* non-virtio ARM nics require legacy -net nic */
+ if (def->os.arch == VIR_ARCH_ARMV7L &&
+ net->info.type != VIR_DOMAIN_DEVICE_ADDRESS_TYPE_VIRTIO_MMIO)
return false;
return true;
}
static bool
-qemuDomainSupportsNetdev(virDomainDefPtr def, virQEMUCapsPtr qemuCaps)
+qemuDomainSupportsNetdev(virDomainDefPtr def,
+ virQEMUCapsPtr qemuCaps,
+ virDomainNetDefPtr net)
{
- if (!qemuDomainSupportsNicdev(def, qemuCaps))
+ if (!qemuDomainSupportsNicdev(def, qemuCaps, net))
return false;
return virQEMUCapsGet(qemuCaps, QEMU_CAPS_NETDEV);
}
@@ -474,7 +479,7 @@ qemuOpenVhostNet(virDomainDefPtr def,
* option), don't try to open the device.
*/
if (!(virQEMUCapsGet(qemuCaps, QEMU_CAPS_VHOST_NET) &&
- qemuDomainSupportsNetdev(def, qemuCaps))) {
+ qemuDomainSupportsNetdev(def, qemuCaps, net))) {
if (net->driver.virtio.name == VIR_DOMAIN_NET_BACKEND_TYPE_VHOST) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
"%s", _("vhost-net is not supported with "
@@ -1146,8 +1151,8 @@ cleanup:
}
static void
-qemuDomainPrimeS390VirtioDevices(virDomainDefPtr def,
- enum virDomainDeviceAddressType type)
+qemuDomainPrimeVirtioDeviceAddresses(virDomainDefPtr def,
+ enum virDomainDeviceAddressType type)
{
/*
declare address-less virtio devices to be of address type 'type'
@@ -1281,7 +1286,7 @@ qemuDomainAssignS390Addresses(virDomainDefPtr def,
if (STREQLEN(def->os.machine, "s390-ccw", 8) &&
virQEMUCapsGet(qemuCaps, QEMU_CAPS_VIRTIO_CCW)) {
- qemuDomainPrimeS390VirtioDevices(
+ qemuDomainPrimeVirtioDeviceAddresses(
def, VIR_DOMAIN_DEVICE_ADDRESS_TYPE_CCW);
if (!(addrs = qemuDomainCCWAddressSetCreate()))
@@ -1296,7 +1301,7 @@ qemuDomainAssignS390Addresses(virDomainDefPtr def,
goto cleanup;
} else if (virQEMUCapsGet(qemuCaps, QEMU_CAPS_VIRTIO_S390)) {
/* deal with legacy virtio-s390 */
- qemuDomainPrimeS390VirtioDevices(
+ qemuDomainPrimeVirtioDeviceAddresses(
def, VIR_DOMAIN_DEVICE_ADDRESS_TYPE_VIRTIO_S390);
}
@@ -1319,6 +1324,18 @@ cleanup:
return ret;
}
+static int
+qemuDomainAssignARMVirtioMMIOAddresses(virDomainDefPtr def,
+ virQEMUCapsPtr qemuCaps)
+{
+ if (def->os.arch == VIR_ARCH_ARMV7L &&
+ STRPREFIX(def->os.machine, "vexpress-") &&
+ virQEMUCapsGet(qemuCaps, QEMU_CAPS_DEVICE_VIRTIO_MMIO)) {
+ qemuDomainPrimeVirtioDeviceAddresses(
+ def, VIR_DOMAIN_DEVICE_ADDRESS_TYPE_VIRTIO_MMIO);
+ }
+ return 0;
+}
static int
qemuSpaprVIOFindByReg(virDomainDefPtr def ATTRIBUTE_UNUSED,
@@ -1834,6 +1851,10 @@ int qemuDomainAssignAddresses(virDomainDefPtr def,
if (rc)
return rc;
+ rc = qemuDomainAssignARMVirtioMMIOAddresses(def, qemuCaps);
+ if (rc)
+ return rc;
+
return qemuDomainAssignPCIAddresses(def, qemuCaps, obj);
}
@@ -3957,6 +3978,9 @@ qemuBuildDriveDevStr(virDomainDefPtr def,
} else if (disk->info.type ==
VIR_DOMAIN_DEVICE_ADDRESS_TYPE_VIRTIO_S390) {
virBufferAddLit(&opt, "virtio-blk-s390");
+ } else if (disk->info.type ==
+ VIR_DOMAIN_DEVICE_ADDRESS_TYPE_VIRTIO_MMIO) {
+ virBufferAddLit(&opt, "virtio-blk-device");
} else {
virBufferAddLit(&opt, "virtio-blk-pci");
}
@@ -4234,6 +4258,9 @@ qemuBuildControllerDevStr(virDomainDefPtr domainDef,
else if (def->info.type ==
VIR_DOMAIN_DEVICE_ADDRESS_TYPE_VIRTIO_S390)
virBufferAddLit(&buf, "virtio-scsi-s390");
+ else if (def->info.type ==
+ VIR_DOMAIN_DEVICE_ADDRESS_TYPE_VIRTIO_MMIO)
+ virBufferAddLit(&buf, "virtio-scsi-device");
else
virBufferAddLit(&buf, "virtio-scsi-pci");
break;
@@ -4263,6 +4290,9 @@ qemuBuildControllerDevStr(virDomainDefPtr domainDef,
} else if (def->info.type ==
VIR_DOMAIN_DEVICE_ADDRESS_TYPE_VIRTIO_S390) {
virBufferAddLit(&buf, "virtio-serial-s390");
+ } else if (def->info.type ==
+ VIR_DOMAIN_DEVICE_ADDRESS_TYPE_VIRTIO_MMIO) {
+ virBufferAddLit(&buf, "virtio-serial-device");
} else {
virBufferAddLit(&buf, "virtio-serial");
}
@@ -4378,6 +4408,8 @@ qemuBuildNicDevStr(virDomainNetDefPtr net,
nic = "virtio-net-ccw";
else if (net->info.type == VIR_DOMAIN_DEVICE_ADDRESS_TYPE_VIRTIO_S390)
nic = "virtio-net-s390";
+ else if (net->info.type == VIR_DOMAIN_DEVICE_ADDRESS_TYPE_VIRTIO_MMIO)
+ nic = "virtio-net-device";
else
nic = "virtio-net-pci";
@@ -4622,6 +4654,9 @@ qemuBuildMemballoonDevStr(virDomainMemballoonDefPtr dev,
case VIR_DOMAIN_DEVICE_ADDRESS_TYPE_CCW:
virBufferAddLit(&buf, "virtio-balloon-ccw");
break;
+ case VIR_DOMAIN_DEVICE_ADDRESS_TYPE_VIRTIO_MMIO:
+ virBufferAddLit(&buf, "virtio-balloon-device");
+ break;
default:
virReportError(VIR_ERR_XML_ERROR,
_("memballoon unsupported with address type '%s'"),
@@ -5615,6 +5650,8 @@ qemuBuildRNGDeviceArgs(virCommandPtr cmd,
virBufferAsprintf(&buf, "virtio-rng-ccw,rng=%s", dev->info.alias);
else if (dev->info.type == VIR_DOMAIN_DEVICE_ADDRESS_TYPE_VIRTIO_S390)
virBufferAsprintf(&buf, "virtio-rng-s390,rng=%s", dev->info.alias);
+ else if (dev->info.type == VIR_DOMAIN_DEVICE_ADDRESS_TYPE_VIRTIO_MMIO)
+ virBufferAsprintf(&buf, "virtio-rng-device,rng=%s", dev->info.alias);
else
virBufferAsprintf(&buf, "virtio-rng-pci,rng=%s", dev->info.alias);
@@ -6891,7 +6928,7 @@ qemuBuildInterfaceCommandLine(virCommandPtr cmd,
*
* NB, no support for -netdev without use of -device
*/
- if (qemuDomainSupportsNetdev(def, qemuCaps)) {
+ if (qemuDomainSupportsNetdev(def, qemuCaps, net)) {
if (!(host = qemuBuildHostNetStr(net, driver,
',', vlan,
tapfdName, tapfdSize,
@@ -6899,7 +6936,7 @@ qemuBuildInterfaceCommandLine(virCommandPtr cmd,
goto cleanup;
virCommandAddArgList(cmd, "-netdev", host, NULL);
}
- if (qemuDomainSupportsNicdev(def, qemuCaps)) {
+ if (qemuDomainSupportsNicdev(def, qemuCaps, net)) {
if (!(nic = qemuBuildNicDevStr(net, vlan, bootindex, qemuCaps)))
goto cleanup;
virCommandAddArgList(cmd, "-device", nic, NULL);
@@ -6908,7 +6945,7 @@ qemuBuildInterfaceCommandLine(virCommandPtr cmd,
goto cleanup;
virCommandAddArgList(cmd, "-net", nic, NULL);
}
- if (!qemuDomainSupportsNetdev(def, qemuCaps)) {
+ if (!qemuDomainSupportsNetdev(def, qemuCaps, net)) {
if (!(host = qemuBuildHostNetStr(net, driver,
',', vlan,
tapfdName, tapfdSize,
@@ -7905,7 +7942,7 @@ qemuBuildCommandLine(virConnectPtr conn,
int vlan;
/* VLANs are not used with -netdev, so don't record them */
- if (qemuDomainSupportsNetdev(def, qemuCaps))
+ if (qemuDomainSupportsNetdev(def, qemuCaps, net))
vlan = -1;
else
vlan = i;
diff --git a/tests/qemuxml2argvdata/qemuxml2argv-arm-vexpressa9-virtio.args b/tests/qemuxml2argvdata/qemuxml2argv-arm-vexpressa9-virtio.args
new file mode 100644
index 0000000..62de9d3
--- /dev/null
+++ b/tests/qemuxml2argvdata/qemuxml2argv-arm-vexpressa9-virtio.args
@@ -0,0 +1,14 @@
+LC_ALL=C PATH=/bin HOME=/home/test USER=test LOGNAME=test QEMU_AUDIO_DRV=none \
+/usr/bin/qemu-system-arm -S -M vexpress-a9 -m 1024 -smp 1 -nographic \
+-nodefconfig -nodefaults -monitor unix:/tmp/test-monitor,server,nowait \
+-boot c -kernel /arm.kernel -initrd /arm.initrd -append \
+'console=ttyAMA0,115200n8 rw root=/dev/vda3 rootwait physmap.enabled=0' \
+-dtb /arm.dtb -device virtio-serial-device,id=virtio-serial0 -usb \
+-drive file=/arm.raw,if=none,id=drive-virtio-disk0 \
+-device virtio-blk-device,drive=drive-virtio-disk0,id=virtio-disk0 \
+-device virtio-net-device,vlan=0,id=net0,mac=52:54:00:09:a4:37 \
+-net user,vlan=0,name=hostnet0 -serial pty -chardev pty,id=charconsole1 \
+-device virtconsole,chardev=charconsole1,id=console1 \
+-device virtio-balloon-device,id=balloon0 \
+-object rng-random,id=rng0,filename=/dev/random \
+-device virtio-rng-device,rng=rng0
diff --git a/tests/qemuxml2argvdata/qemuxml2argv-arm-vexpressa9-virtio.xml b/tests/qemuxml2argvdata/qemuxml2argv-arm-vexpressa9-virtio.xml
new file mode 100644
index 0000000..2acf3c9
--- /dev/null
+++ b/tests/qemuxml2argvdata/qemuxml2argv-arm-vexpressa9-virtio.xml
@@ -0,0 +1,45 @@
+<domain type="qemu">
+ <name>armtest</name>
+ <uuid>496d7ea8-9739-544b-4ebd-ef08be936e6a</uuid>
+ <memory>1048576</memory>
+ <currentMemory>1048576</currentMemory>
+ <vcpu>1</vcpu>
+ <os>
+ <type arch="armv7l" machine="vexpress-a9">hvm</type>
+ <kernel>/arm.kernel</kernel>
+ <initrd>/arm.initrd</initrd>
+ <dtb>/arm.dtb</dtb>
+ <cmdline>console=ttyAMA0,115200n8 rw root=/dev/vda3 rootwait physmap.enabled=0</cmdline>
+ </os>
+ <features>
+ <acpi/>
+ <apic/>
+ <pae/>
+ </features>
+ <clock offset="utc"/>
+ <on_poweroff>destroy</on_poweroff>
+ <on_reboot>restart</on_reboot>
+ <on_crash>restart</on_crash>
+ <devices>
+ <emulator>/usr/bin/qemu-system-arm</emulator>
+ <disk type='file' device='disk'>
+ <source file='/arm.raw'/>
+ <target dev='vda' bus='virtio'/>
+ </disk>
+ <interface type='user'>
+ <mac address='52:54:00:09:a4:37'/>
+ <model type='virtio'/>
+ </interface>
+ <console type='pty'/>
+ <console type='pty'>
+ <target type='virtio' port='0'/>
+ </console>
+ <memballoon model='virtio'/>
+ <!--
+ This actually doesn't work in practice because vexpress only has
+ 4 virtio slots available, rng makes 5 -->
+ <rng model='virtio'>
+ <backend model='random'>/dev/random</backend>
+ </rng>
+ </devices>
+</domain>
diff --git a/tests/qemuxml2argvtest.c b/tests/qemuxml2argvtest.c
index 0bf2724..2bdd18e 100644
--- a/tests/qemuxml2argvtest.c
+++ b/tests/qemuxml2argvtest.c
@@ -1032,6 +1032,10 @@ mymain(void)
DO_TEST("arm-vexpressa9-basic",
QEMU_CAPS_DEVICE, QEMU_CAPS_NODEFCONFIG, QEMU_CAPS_DTB,
QEMU_CAPS_DRIVE);
+ DO_TEST("arm-vexpressa9-virtio",
+ QEMU_CAPS_DEVICE, QEMU_CAPS_NODEFCONFIG, QEMU_CAPS_DTB,
+ QEMU_CAPS_DRIVE, QEMU_CAPS_DEVICE_VIRTIO_MMIO,
+ QEMU_CAPS_DEVICE_VIRTIO_RNG, QEMU_CAPS_OBJECT_RNG_RANDOM);
virObjectUnref(driver.config);
virObjectUnref(driver.caps);
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