August 2020 - Devel - libvirt List Archives

[libvirt PATCH 00/11] lower maximum frame size
by Ján Tomko 28 Aug '20

28 Aug '20

Ján Tomko (11): conf: split out virDomainDefParseIDs conf: split out virDomainDefParseMemory conf: introduce virDomainDefTunablesParse conf: introduce virDomainDefLifecycleParse conf: introduce virDomainDefClockParse conf: introduce virDomainDefControllersParse esx: esxConnectOpen: use allocated buffer libxl: allocate d_config lxc: virLXCProcessStart: use allocated buffers remote: allocate def in remoteRelayDomainEventCheckACL build: lower maximum frame size to 1972 meson.build | 7 +- src/conf/domain_conf.c | 728 ++++++++++++++++------------ src/esx/esx_driver.c | 7 +- src/libxl/libxl_domain.c | 24 +- src/lxc/lxc_process.c | 19 +- src/remote/remote_daemon_dispatch.c | 9 +- 6 files changed, 454 insertions(+), 340 deletions(-) -- 2.26.2

2 13

[libvirt PATCH] libxl: do not include math.h
by Ján Tomko 27 Aug '20

27 Aug '20

The include was introduced by: commit 3d6fe99c5c3b862db1b345da3598a920f1079b6e Add vcpu functions to libxl driver which used ceil() and floor(), but these were later removed by: commit 3eb869a04bdeaddbe10e74568540e865fb79e412 libxl: avoid compiler warning which did not remove the include. Signed-off-by: Ján Tomko <jtomko(a)redhat.com> --- src/libxl/libxl_driver.c | 1 - 1 file changed, 1 deletion(-) diff --git a/src/libxl/libxl_driver.c b/src/libxl/libxl_driver.c index dc602ea162..31f2531162 100644 --- a/src/libxl/libxl_driver.c +++ b/src/libxl/libxl_driver.c @@ -22,7 +22,6 @@ #include <config.h> -#include <math.h> #include <libxl.h> #include <libxl_utils.h> #include <xenstore.h> -- 2.26.2

2 1

[PATCH] docs: add kbase entry for migrationinternals
by Fangge Jin 27 Aug '20

27 Aug '20

Commit c051e56d27 added migrationinternals.rst in kbase, but the entry was missing. Signed-off-by: Fangge Jin <fjin(a)redhat.com> --- docs/kbase.rst | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/docs/kbase.rst b/docs/kbase.rst index 78daaa5989..546be6785e 100644 --- a/docs/kbase.rst +++ b/docs/kbase.rst @@ -44,3 +44,7 @@ Knowledge base `Incremental backup internals <kbase/incrementalbackupinternals.html>`__ Incremental backup implementation details relevant for users + + `VM migration internals <kbase/migrationinternals.html>`__ + VM migration implementation details, complementing the info in + `migration <migration.html>`__ -- 2.20.1

3 2

[libvirt PATCH] RFC: Add support for vDPA network devices
by Jonathon Jongsma 27 Aug '20

27 Aug '20

vDPA network devices allow high-performance networking in a virtual machine by providing a wire-speed data path. These devices require a vendor-specific host driver but the data path follows the virtio specification. The support for vDPA devices was recently added to qemu. This allows libvirt to support these devices. It requires that the device is configured on the host with the appropriate vendor-specific driver. This will create a chardev on the host at e.g. /dev/vhost-vdpa-0. That chardev path can then be used to define a new interface with type='vdpa'. --- docs/formatdomain.rst | 20 +++++++++ docs/schemas/domaincommon.rng | 15 +++++++ src/conf/domain_conf.c | 41 +++++++++++++++++++ src/conf/domain_conf.h | 4 ++ src/conf/netdev_bandwidth_conf.c | 1 + src/libxl/libxl_conf.c | 1 + src/libxl/xen_common.c | 1 + src/lxc/lxc_controller.c | 1 + src/lxc/lxc_driver.c | 3 ++ src/lxc/lxc_process.c | 1 + src/qemu/qemu_command.c | 29 ++++++++++++- src/qemu/qemu_command.h | 3 +- src/qemu/qemu_domain.c | 6 ++- src/qemu/qemu_hotplug.c | 15 ++++--- src/qemu/qemu_interface.c | 25 +++++++++++ src/qemu/qemu_interface.h | 2 + src/qemu/qemu_process.c | 1 + src/qemu/qemu_validate.c | 1 + src/vmx/vmx.c | 1 + .../net-vdpa.x86_64-latest.args | 37 +++++++++++++++++ tests/qemuxml2argvdata/net-vdpa.xml | 28 +++++++++++++ tests/qemuxml2argvmock.c | 11 ++++- tests/qemuxml2argvtest.c | 1 + tests/qemuxml2xmloutdata/net-vdpa.xml | 34 +++++++++++++++ tests/qemuxml2xmltest.c | 1 + tools/virsh-domain.c | 1 + 26 files changed, 274 insertions(+), 10 deletions(-) create mode 100644 tests/qemuxml2argvdata/net-vdpa.x86_64-latest.args create mode 100644 tests/qemuxml2argvdata/net-vdpa.xml create mode 100644 tests/qemuxml2xmloutdata/net-vdpa.xml diff --git a/docs/formatdomain.rst b/docs/formatdomain.rst index 8365fc8bbb..1356485504 100644 --- a/docs/formatdomain.rst +++ b/docs/formatdomain.rst @@ -4632,6 +4632,26 @@ or stopping the guest. </devices> ... +:anchor:`<a id="elementsNICSVDPA"/>` + +vDPA devices +^^^^^^^^^^^^ + +A vDPA device can be used to provide wire speed network performance within a +domain. The host device must already be configured with the appropriate +device-specific vDPA driver. This creates a vDPA char device (e.g. +/dev/vhost-vdpa-0) that can be used to assign the device to a libvirt domain. + +:: + + ... + <devices> + <interface type='vdpa'> + <source dev='/dev/vhost-vdpa-0'/> + </interface> + </devices> + ... + :anchor:`<a id="elementsTeaming"/>` Teaming a virtio/hostdev NIC pair diff --git a/docs/schemas/domaincommon.rng b/docs/schemas/domaincommon.rng index 0d0dcbc5ce..17f74490f4 100644 --- a/docs/schemas/domaincommon.rng +++ b/docs/schemas/domaincommon.rng @@ -3108,6 +3108,21 @@ <ref name="interface-options"/> </interleave> </group> + + <group> + <attribute name="type"> + <value>vdpa</value> + </attribute> + <interleave> + <element name="source"> + <attribute name="dev"> + <ref name="deviceName"/> + </attribute> + </element> + <ref name="interface-options"/> + </interleave> + </group> + </choice> <optional> <attribute name="trustGuestRxFilters"> diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c index 8e7981bf25..74f2c2f3e3 100644 --- a/src/conf/domain_conf.c +++ b/src/conf/domain_conf.c @@ -549,6 +549,7 @@ VIR_ENUM_IMPL(virDomainNet, "direct", "hostdev", "udp", + "vdpa", ); VIR_ENUM_IMPL(virDomainNetModel, @@ -2495,6 +2496,10 @@ virDomainNetDefClear(virDomainNetDefPtr def) def->data.vhostuser = NULL; break; + case VIR_DOMAIN_NET_TYPE_VDPA: + VIR_FREE(def->data.vdpa.devicepath); + break; + case VIR_DOMAIN_NET_TYPE_SERVER: case VIR_DOMAIN_NET_TYPE_CLIENT: case VIR_DOMAIN_NET_TYPE_MCAST: @@ -6489,6 +6494,15 @@ virDomainNetDefValidate(const virDomainNetDef *net) return -1; } + if (net->type == VIR_DOMAIN_NET_TYPE_VDPA && + net->model != VIR_DOMAIN_NET_MODEL_VIRTIO) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, + _("invalid model for interface of type '%s': '%s'"), + virDomainNetTypeToString(net->type), + virDomainNetModelTypeToString(net->model)); + return -1; + } + return 0; } @@ -11982,6 +11996,7 @@ virDomainNetDefParseXML(virDomainXMLOptionPtr xmlopt, g_autofree char *vhost_path = NULL; g_autofree char *teamingType = NULL; g_autofree char *teamingPersistent = NULL; + g_autofree char *vdpa_dev = NULL; const char *prefix = xmlopt ? xmlopt->config.netPrefix : NULL; if (!(def = virDomainNetDefNew(xmlopt))) @@ -12075,6 +12090,10 @@ virDomainNetDefParseXML(virDomainXMLOptionPtr xmlopt, if (virDomainChrSourceReconnectDefParseXML(&reconnect, cur, ctxt) < 0) goto error; + } else if (!vdpa_dev + && def->type == VIR_DOMAIN_NET_TYPE_VDPA + && virXMLNodeNameEqual(cur, "source")) { + vdpa_dev = virXMLPropString(cur, "dev"); } else if (!def->virtPortProfile && virXMLNodeNameEqual(cur, "virtualport")) { if (def->type == VIR_DOMAIN_NET_TYPE_NETWORK) { @@ -12332,6 +12351,16 @@ virDomainNetDefParseXML(virDomainXMLOptionPtr xmlopt, } break; + case VIR_DOMAIN_NET_TYPE_VDPA: + if (vdpa_dev == NULL) { + virReportError(VIR_ERR_INTERNAL_ERROR, "%s", + _("No <source> 'dev' attribute " + "specified with <interface type='vdpa'/>")); + goto error; + } + def->data.vdpa.devicepath = g_steal_pointer(&vdpa_dev); + break; + case VIR_DOMAIN_NET_TYPE_BRIDGE: if (bridge == NULL) { virReportError(VIR_ERR_INTERNAL_ERROR, "%s", @@ -12727,6 +12756,7 @@ virDomainNetDefParseXML(virDomainXMLOptionPtr xmlopt, case VIR_DOMAIN_NET_TYPE_DIRECT: case VIR_DOMAIN_NET_TYPE_HOSTDEV: case VIR_DOMAIN_NET_TYPE_UDP: + case VIR_DOMAIN_NET_TYPE_VDPA: break; case VIR_DOMAIN_NET_TYPE_LAST: default: @@ -26737,6 +26767,14 @@ virDomainNetDefFormat(virBufferPtr buf, } break; + case VIR_DOMAIN_NET_TYPE_VDPA: + if (def->data.vdpa.devicepath) { + virBufferEscapeString(buf, "<source dev='%s'", + def->data.vdpa.devicepath); + sourceLines++; + } + break; + case VIR_DOMAIN_NET_TYPE_USER: case VIR_DOMAIN_NET_TYPE_LAST: break; @@ -30902,6 +30940,7 @@ virDomainNetGetActualVirtPortProfile(const virDomainNetDef *iface) case VIR_DOMAIN_NET_TYPE_MCAST: case VIR_DOMAIN_NET_TYPE_INTERNAL: case VIR_DOMAIN_NET_TYPE_UDP: + case VIR_DOMAIN_NET_TYPE_VDPA: case VIR_DOMAIN_NET_TYPE_LAST: default: return NULL; @@ -31718,6 +31757,7 @@ virDomainNetTypeSharesHostView(const virDomainNetDef *net) case VIR_DOMAIN_NET_TYPE_INTERNAL: case VIR_DOMAIN_NET_TYPE_HOSTDEV: case VIR_DOMAIN_NET_TYPE_UDP: + case VIR_DOMAIN_NET_TYPE_VDPA: case VIR_DOMAIN_NET_TYPE_LAST: break; } @@ -31982,6 +32022,7 @@ virDomainNetDefActualToNetworkPort(virDomainDefPtr dom, case VIR_DOMAIN_NET_TYPE_UDP: case VIR_DOMAIN_NET_TYPE_USER: case VIR_DOMAIN_NET_TYPE_VHOSTUSER: + case VIR_DOMAIN_NET_TYPE_VDPA: virReportError(VIR_ERR_CONFIG_UNSUPPORTED, _("Unexpected network port type %s"), virDomainNetTypeToString(virDomainNetGetActualType(iface))); diff --git a/src/conf/domain_conf.h b/src/conf/domain_conf.h index 68be32614c..4f63a3eef4 100644 --- a/src/conf/domain_conf.h +++ b/src/conf/domain_conf.h @@ -872,6 +872,7 @@ typedef enum { VIR_DOMAIN_NET_TYPE_DIRECT, VIR_DOMAIN_NET_TYPE_HOSTDEV, VIR_DOMAIN_NET_TYPE_UDP, + VIR_DOMAIN_NET_TYPE_VDPA, VIR_DOMAIN_NET_TYPE_LAST } virDomainNetType; @@ -1045,6 +1046,9 @@ struct _virDomainNetDef { */ virDomainActualNetDefPtr actual; } network; + struct { + char *devicepath; + } vdpa; struct { char *brname; } bridge; diff --git a/src/conf/netdev_bandwidth_conf.c b/src/conf/netdev_bandwidth_conf.c index 396ac62019..4eb12e2951 100644 --- a/src/conf/netdev_bandwidth_conf.c +++ b/src/conf/netdev_bandwidth_conf.c @@ -315,6 +315,7 @@ bool virNetDevSupportsBandwidth(virDomainNetType type) case VIR_DOMAIN_NET_TYPE_UDP: case VIR_DOMAIN_NET_TYPE_INTERNAL: case VIR_DOMAIN_NET_TYPE_HOSTDEV: + case VIR_DOMAIN_NET_TYPE_VDPA: case VIR_DOMAIN_NET_TYPE_LAST: break; } diff --git a/src/libxl/libxl_conf.c b/src/libxl/libxl_conf.c index 7c2c015015..709cdc8719 100644 --- a/src/libxl/libxl_conf.c +++ b/src/libxl/libxl_conf.c @@ -1371,6 +1371,7 @@ libxlMakeNic(virDomainDefPtr def, case VIR_DOMAIN_NET_TYPE_INTERNAL: case VIR_DOMAIN_NET_TYPE_DIRECT: case VIR_DOMAIN_NET_TYPE_HOSTDEV: + case VIR_DOMAIN_NET_TYPE_VDPA: case VIR_DOMAIN_NET_TYPE_LAST: virReportError(VIR_ERR_CONFIG_UNSUPPORTED, _("unsupported interface type %s"), diff --git a/src/libxl/xen_common.c b/src/libxl/xen_common.c index 75fe7e0644..b1ec34bf11 100644 --- a/src/libxl/xen_common.c +++ b/src/libxl/xen_common.c @@ -1776,6 +1776,7 @@ xenFormatNet(virConnectPtr conn, case VIR_DOMAIN_NET_TYPE_HOSTDEV: case VIR_DOMAIN_NET_TYPE_UDP: case VIR_DOMAIN_NET_TYPE_USER: + case VIR_DOMAIN_NET_TYPE_VDPA: virReportError(VIR_ERR_CONFIG_UNSUPPORTED, _("Unsupported net type '%s'"), virDomainNetTypeToString(net->type)); return -1; diff --git a/src/lxc/lxc_controller.c b/src/lxc/lxc_controller.c index ae6b737b60..cb573d6c01 100644 --- a/src/lxc/lxc_controller.c +++ b/src/lxc/lxc_controller.c @@ -422,6 +422,7 @@ static int virLXCControllerGetNICIndexes(virLXCControllerPtr ctrl) case VIR_DOMAIN_NET_TYPE_UDP: case VIR_DOMAIN_NET_TYPE_INTERNAL: case VIR_DOMAIN_NET_TYPE_HOSTDEV: + case VIR_DOMAIN_NET_TYPE_VDPA: virReportError(VIR_ERR_CONFIG_UNSUPPORTED, _("Unsupported net type %s"), virDomainNetTypeToString(actualType)); diff --git a/src/lxc/lxc_driver.c b/src/lxc/lxc_driver.c index 1cdd6ee455..a36f83a588 100644 --- a/src/lxc/lxc_driver.c +++ b/src/lxc/lxc_driver.c @@ -3503,6 +3503,7 @@ lxcDomainAttachDeviceNetLive(virLXCDriverPtr driver, case VIR_DOMAIN_NET_TYPE_INTERNAL: case VIR_DOMAIN_NET_TYPE_HOSTDEV: case VIR_DOMAIN_NET_TYPE_UDP: + case VIR_DOMAIN_NET_TYPE_VDPA: virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", _("Network device type is not supported")); goto cleanup; @@ -3557,6 +3558,7 @@ lxcDomainAttachDeviceNetLive(virLXCDriverPtr driver, case VIR_DOMAIN_NET_TYPE_INTERNAL: case VIR_DOMAIN_NET_TYPE_HOSTDEV: case VIR_DOMAIN_NET_TYPE_UDP: + case VIR_DOMAIN_NET_TYPE_VDPA: case VIR_DOMAIN_NET_TYPE_LAST: default: /* no-op */ @@ -3998,6 +4000,7 @@ lxcDomainDetachDeviceNetLive(virDomainObjPtr vm, case VIR_DOMAIN_NET_TYPE_INTERNAL: case VIR_DOMAIN_NET_TYPE_HOSTDEV: case VIR_DOMAIN_NET_TYPE_UDP: + case VIR_DOMAIN_NET_TYPE_VDPA: virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", _("Only bridged veth devices can be detached")); goto cleanup; diff --git a/src/lxc/lxc_process.c b/src/lxc/lxc_process.c index fc59c2e5af..90e9790cea 100644 --- a/src/lxc/lxc_process.c +++ b/src/lxc/lxc_process.c @@ -606,6 +606,7 @@ virLXCProcessSetupInterfaces(virLXCDriverPtr driver, case VIR_DOMAIN_NET_TYPE_INTERNAL: case VIR_DOMAIN_NET_TYPE_LAST: case VIR_DOMAIN_NET_TYPE_HOSTDEV: + case VIR_DOMAIN_NET_TYPE_VDPA: virReportError(VIR_ERR_INTERNAL_ERROR, _("Unsupported network type %s"), virDomainNetTypeToString(type)); diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c index 01812cd39b..9c5265ccdf 100644 --- a/src/qemu/qemu_command.c +++ b/src/qemu/qemu_command.c @@ -3552,7 +3552,8 @@ qemuBuildHostNetStr(virDomainNetDefPtr net, size_t tapfdSize, char **vhostfd, size_t vhostfdSize, - const char *slirpfd) + const char *slirpfd, + const char *vdpafd) { bool is_tap = false; virDomainNetType netType = virDomainNetGetActualType(net); @@ -3690,6 +3691,13 @@ qemuBuildHostNetStr(virDomainNetDefPtr net, return NULL; break; + case VIR_DOMAIN_NET_TYPE_VDPA: + /* Caller will pass the fd to qemu with add-fd */ + if (virJSONValueObjectCreate(&netprops, "s:type", "vhost-vdpa", NULL) < 0 || + virJSONValueObjectAppendString(netprops, "vhostdev", vdpafd) < 0) + return NULL; + break; + case VIR_DOMAIN_NET_TYPE_HOSTDEV: /* Should have been handled earlier via PCI/USB hotplug code. */ case VIR_DOMAIN_NET_TYPE_LAST: @@ -8013,6 +8021,8 @@ qemuBuildInterfaceCommandLine(virQEMUDriverPtr driver, char **tapfdName = NULL; char **vhostfdName = NULL; g_autofree char *slirpfdName = NULL; + g_autofree char *vdpafdName = NULL; + int vdpafd = -1; virDomainNetType actualType = virDomainNetGetActualType(net); const virNetDevBandwidth *actualBandwidth; bool requireNicdev = false; @@ -8098,6 +8108,11 @@ qemuBuildInterfaceCommandLine(virQEMUDriverPtr driver, break; + case VIR_DOMAIN_NET_TYPE_VDPA: + if ((vdpafd = qemuInterfaceVDPAConnect(net)) < 0) + goto cleanup; + break; + case VIR_DOMAIN_NET_TYPE_USER: case VIR_DOMAIN_NET_TYPE_SERVER: case VIR_DOMAIN_NET_TYPE_CLIENT: @@ -8140,6 +8155,7 @@ qemuBuildInterfaceCommandLine(virQEMUDriverPtr driver, case VIR_DOMAIN_NET_TYPE_UDP: case VIR_DOMAIN_NET_TYPE_INTERNAL: case VIR_DOMAIN_NET_TYPE_HOSTDEV: + case VIR_DOMAIN_NET_TYPE_VDPA: case VIR_DOMAIN_NET_TYPE_LAST: /* These types don't use a network device on the host, but * instead use some other type of connection to the emulated @@ -8219,13 +8235,22 @@ qemuBuildInterfaceCommandLine(virQEMUDriverPtr driver, vhostfd[i] = -1; } + if (vdpafd > 0) { + virCommandPassFD(cmd, vdpafd, VIR_COMMAND_PASS_FD_CLOSE_PARENT); + g_autofree char *fdset = qemuVirCommandGetFDSet(cmd, vdpafd); + if (!fdset) + goto cleanup; + virCommandAddArgList(cmd, "-add-fd", fdset, NULL); + vdpafdName = qemuVirCommandGetDevSet(cmd, vdpafd); + } + if (chardev) virCommandAddArgList(cmd, "-chardev", chardev, NULL); if (!(hostnetprops = qemuBuildHostNetStr(net, tapfdName, tapfdSize, vhostfdName, vhostfdSize, - slirpfdName))) + slirpfdName, vdpafdName))) goto cleanup; if (!(host = virQEMUBuildNetdevCommandlineFromJSON(hostnetprops, diff --git a/src/qemu/qemu_command.h b/src/qemu/qemu_command.h index 89d99b111f..e8b4f4785a 100644 --- a/src/qemu/qemu_command.h +++ b/src/qemu/qemu_command.h @@ -99,7 +99,8 @@ virJSONValuePtr qemuBuildHostNetStr(virDomainNetDefPtr net, size_t tapfdSize, char **vhostfd, size_t vhostfdSize, - const char *slirpfd); + const char *slirpfd, + const char *vdpafd); /* Current, best practice */ char *qemuBuildNicDevStr(virDomainDefPtr def, diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c index c440c79e1d..daae5a1b03 100644 --- a/src/qemu/qemu_domain.c +++ b/src/qemu/qemu_domain.c @@ -5027,7 +5027,10 @@ qemuDomainDeviceNetDefPostParse(virDomainNetDefPtr net, const virDomainDef *def, virQEMUCapsPtr qemuCaps) { - if (net->type != VIR_DOMAIN_NET_TYPE_HOSTDEV && + if (net->type == VIR_DOMAIN_NET_TYPE_VDPA && + !virDomainNetGetModelString(net)) + net->model = VIR_DOMAIN_NET_MODEL_VIRTIO; + else if (net->type != VIR_DOMAIN_NET_TYPE_HOSTDEV && !virDomainNetGetModelString(net) && virDomainNetResolveActualType(net) != VIR_DOMAIN_NET_TYPE_HOSTDEV) net->model = qemuDomainDefaultNetModel(def, qemuCaps); @@ -9201,6 +9204,7 @@ qemuDomainNetSupportsMTU(virDomainNetType type) case VIR_DOMAIN_NET_TYPE_DIRECT: case VIR_DOMAIN_NET_TYPE_HOSTDEV: case VIR_DOMAIN_NET_TYPE_UDP: + case VIR_DOMAIN_NET_TYPE_VDPA: case VIR_DOMAIN_NET_TYPE_LAST: break; } diff --git a/src/qemu/qemu_hotplug.c b/src/qemu/qemu_hotplug.c index 2c6c30ce03..23ae2310a2 100644 --- a/src/qemu/qemu_hotplug.c +++ b/src/qemu/qemu_hotplug.c @@ -1340,6 +1340,7 @@ qemuDomainAttachNetDevice(virQEMUDriverPtr driver, case VIR_DOMAIN_NET_TYPE_MCAST: case VIR_DOMAIN_NET_TYPE_INTERNAL: case VIR_DOMAIN_NET_TYPE_UDP: + case VIR_DOMAIN_NET_TYPE_VDPA: case VIR_DOMAIN_NET_TYPE_LAST: virReportError(VIR_ERR_OPERATION_UNSUPPORTED, _("hotplug of interface type of %s is not implemented yet"), @@ -1388,7 +1389,7 @@ qemuDomainAttachNetDevice(virQEMUDriverPtr driver, if (!(netprops = qemuBuildHostNetStr(net, tapfdName, tapfdSize, vhostfdName, vhostfdSize, - slirpfdName))) + slirpfdName, NULL))) goto cleanup; qemuDomainObjEnterMonitor(driver, vm); @@ -3390,6 +3391,7 @@ qemuDomainChangeNetFilter(virDomainObjPtr vm, case VIR_DOMAIN_NET_TYPE_DIRECT: case VIR_DOMAIN_NET_TYPE_HOSTDEV: case VIR_DOMAIN_NET_TYPE_UDP: + case VIR_DOMAIN_NET_TYPE_VDPA: virReportError(VIR_ERR_CONFIG_UNSUPPORTED, _("filters not supported on interfaces of type %s"), virDomainNetTypeToString(virDomainNetGetActualType(newdev))); @@ -3483,8 +3485,9 @@ qemuDomainChangeNet(virQEMUDriverPtr driver, olddev = *devslot; oldType = virDomainNetGetActualType(olddev); - if (oldType == VIR_DOMAIN_NET_TYPE_HOSTDEV) { - /* no changes are possible to a type='hostdev' interface */ + if (oldType == VIR_DOMAIN_NET_TYPE_HOSTDEV || + oldType == VIR_DOMAIN_NET_TYPE_VDPA) { + /* no changes are possible to a type='hostdev' or type='vdpa' interface */ virReportError(VIR_ERR_OPERATION_UNSUPPORTED, _("cannot change config of '%s' network type"), virDomainNetTypeToString(oldType)); @@ -3671,8 +3674,9 @@ qemuDomainChangeNet(virQEMUDriverPtr driver, newType = virDomainNetGetActualType(newdev); - if (newType == VIR_DOMAIN_NET_TYPE_HOSTDEV) { - /* can't turn it into a type='hostdev' interface */ + if (newType == VIR_DOMAIN_NET_TYPE_HOSTDEV || + newType == VIR_DOMAIN_NET_TYPE_VDPA) { + /* can't turn it into a type='hostdev' or type='vdpa' interface */ virReportError(VIR_ERR_OPERATION_UNSUPPORTED, _("cannot change network interface type to '%s'"), virDomainNetTypeToString(newType)); @@ -3726,6 +3730,7 @@ qemuDomainChangeNet(virQEMUDriverPtr driver, break; case VIR_DOMAIN_NET_TYPE_VHOSTUSER: + case VIR_DOMAIN_NET_TYPE_VDPA: case VIR_DOMAIN_NET_TYPE_HOSTDEV: virReportError(VIR_ERR_OPERATION_UNSUPPORTED, _("unable to change config on '%s' network type"), diff --git a/src/qemu/qemu_interface.c b/src/qemu/qemu_interface.c index ffec992596..676648ebab 100644 --- a/src/qemu/qemu_interface.c +++ b/src/qemu/qemu_interface.c @@ -118,6 +118,7 @@ qemuInterfaceStartDevice(virDomainNetDefPtr net) case VIR_DOMAIN_NET_TYPE_UDP: case VIR_DOMAIN_NET_TYPE_INTERNAL: case VIR_DOMAIN_NET_TYPE_HOSTDEV: + case VIR_DOMAIN_NET_TYPE_VDPA: case VIR_DOMAIN_NET_TYPE_LAST: /* these types all require no action */ break; @@ -203,6 +204,7 @@ qemuInterfaceStopDevice(virDomainNetDefPtr net) case VIR_DOMAIN_NET_TYPE_UDP: case VIR_DOMAIN_NET_TYPE_INTERNAL: case VIR_DOMAIN_NET_TYPE_HOSTDEV: + case VIR_DOMAIN_NET_TYPE_VDPA: case VIR_DOMAIN_NET_TYPE_LAST: /* these types all require no action */ break; @@ -630,6 +632,29 @@ qemuInterfaceBridgeConnect(virDomainDefPtr def, } +/* qemuInterfaceVDPAConnect: + * @net: pointer to the VM's interface description + * + * returns: file descriptor of the vdpa device + * + * Called *only* called if actualType is VIR_DOMAIN_NET_TYPE_VDPA + */ +int +qemuInterfaceVDPAConnect(virDomainNetDefPtr net) +{ + int fd; + + if ((fd = open(net->data.vdpa.devicepath, O_RDWR)) < 0) { + virReportSystemError(errno, + _("Unable to open '%s' for vdpa device"), + net->data.vdpa.devicepath); + return -1; + } + + return fd; +} + + qemuSlirpPtr qemuInterfacePrepareSlirp(virQEMUDriverPtr driver, virDomainNetDefPtr net) diff --git a/src/qemu/qemu_interface.h b/src/qemu/qemu_interface.h index 3dcefc6a12..1ba24f0a6f 100644 --- a/src/qemu/qemu_interface.h +++ b/src/qemu/qemu_interface.h @@ -58,3 +58,5 @@ int qemuInterfaceOpenVhostNet(virDomainDefPtr def, qemuSlirpPtr qemuInterfacePrepareSlirp(virQEMUDriverPtr driver, virDomainNetDefPtr net); + +int qemuInterfaceVDPAConnect(virDomainNetDefPtr net) G_GNUC_NO_INLINE; diff --git a/src/qemu/qemu_process.c b/src/qemu/qemu_process.c index 126fabf5ef..70c3b9b46d 100644 --- a/src/qemu/qemu_process.c +++ b/src/qemu/qemu_process.c @@ -7517,6 +7517,7 @@ void qemuProcessStop(virQEMUDriverPtr driver, case VIR_DOMAIN_NET_TYPE_INTERNAL: case VIR_DOMAIN_NET_TYPE_HOSTDEV: case VIR_DOMAIN_NET_TYPE_UDP: + case VIR_DOMAIN_NET_TYPE_VDPA: case VIR_DOMAIN_NET_TYPE_LAST: /* No special cleanup procedure for these types. */ break; diff --git a/src/qemu/qemu_validate.c b/src/qemu/qemu_validate.c index 488f258d00..623f998463 100644 --- a/src/qemu/qemu_validate.c +++ b/src/qemu/qemu_validate.c @@ -1130,6 +1130,7 @@ qemuValidateNetSupportsCoalesce(virDomainNetType type) case VIR_DOMAIN_NET_TYPE_MCAST: case VIR_DOMAIN_NET_TYPE_INTERNAL: case VIR_DOMAIN_NET_TYPE_UDP: + case VIR_DOMAIN_NET_TYPE_VDPA: case VIR_DOMAIN_NET_TYPE_LAST: break; } diff --git a/src/vmx/vmx.c b/src/vmx/vmx.c index a123a8807c..f6f6efb322 100644 --- a/src/vmx/vmx.c +++ b/src/vmx/vmx.c @@ -3833,6 +3833,7 @@ virVMXFormatEthernet(virDomainNetDefPtr def, int controller, case VIR_DOMAIN_NET_TYPE_DIRECT: case VIR_DOMAIN_NET_TYPE_HOSTDEV: case VIR_DOMAIN_NET_TYPE_UDP: + case VIR_DOMAIN_NET_TYPE_VDPA: virReportError(VIR_ERR_CONFIG_UNSUPPORTED, _("Unsupported net type '%s'"), virDomainNetTypeToString(def->type)); return -1; diff --git a/tests/qemuxml2argvdata/net-vdpa.x86_64-latest.args b/tests/qemuxml2argvdata/net-vdpa.x86_64-latest.args new file mode 100644 index 0000000000..8e76ac7794 --- /dev/null +++ b/tests/qemuxml2argvdata/net-vdpa.x86_64-latest.args @@ -0,0 +1,37 @@ +LC_ALL=C \ +PATH=/bin \ +HOME=/tmp/lib/domain--1-QEMUGuest1 \ +USER=test \ +LOGNAME=test \ +XDG_DATA_HOME=/tmp/lib/domain--1-QEMUGuest1/.local/share \ +XDG_CACHE_HOME=/tmp/lib/domain--1-QEMUGuest1/.cache \ +XDG_CONFIG_HOME=/tmp/lib/domain--1-QEMUGuest1/.config \ +QEMU_AUDIO_DRV=none \ +/usr/bin/qemu-system-i386 \ +-name guest=QEMUGuest1,debug-threads=on \ +-S \ +-object secret,id=masterKey0,format=raw,\ +file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \ +-machine pc,accel=tcg,usb=off,dump-guest-core=off \ +-cpu qemu64 \ +-m 214 \ +-overcommit mem-lock=off \ +-smp 1,sockets=1,cores=1,threads=1 \ +-uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \ +-display none \ +-no-user-config \ +-nodefaults \ +-chardev socket,id=charmonitor,fd=1729,server,nowait \ +-mon chardev=charmonitor,id=monitor,mode=control \ +-rtc base=utc \ +-no-shutdown \ +-no-acpi \ +-boot strict=on \ +-device piix3-usb-uhci,id=usb,bus=pci.0,addr=0x1.0x2 \ +-add-fd set=0,fd=1732 \ +-netdev vhost-vdpa,vhostdev=/dev/fdset/0,id=hostnet0 \ +-device virtio-net-pci,netdev=hostnet0,id=net0,mac=52:54:00:95:db:c0,bus=pci.0,\ +addr=0x2 \ +-sandbox on,obsolete=deny,elevateprivileges=deny,spawn=deny,\ +resourcecontrol=deny \ +-msg timestamp=on diff --git a/tests/qemuxml2argvdata/net-vdpa.xml b/tests/qemuxml2argvdata/net-vdpa.xml new file mode 100644 index 0000000000..30cca7eb6e --- /dev/null +++ b/tests/qemuxml2argvdata/net-vdpa.xml @@ -0,0 +1,28 @@ +<domain type='qemu'> + <name>QEMUGuest1</name> + <uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid> + <memory unit='KiB'>219136</memory> + <currentMemory unit='KiB'>219136</currentMemory> + <vcpu placement='static'>1</vcpu> + <os> + <type arch='i686' machine='pc'>hvm</type> + <boot dev='hd'/> + </os> + <clock offset='utc'/> + <on_poweroff>destroy</on_poweroff> + <on_reboot>restart</on_reboot> + <on_crash>destroy</on_crash> + <devices> + <emulator>/usr/bin/qemu-system-i386</emulator> + <controller type='usb' index='0'/> + <controller type='ide' index='0'/> + <controller type='pci' index='0' model='pci-root'/> + <interface type='vdpa'> + <mac address='52:54:00:95:db:c0'/> + <source dev='/dev/vhost-vdpa-0'/> + </interface> + <input type='mouse' bus='ps2'/> + <input type='keyboard' bus='ps2'/> + <memballoon model='none'/> + </devices> +</domain> diff --git a/tests/qemuxml2argvmock.c b/tests/qemuxml2argvmock.c index e5841bc8e3..516776697f 100644 --- a/tests/qemuxml2argvmock.c +++ b/tests/qemuxml2argvmock.c @@ -205,7 +205,7 @@ virHostGetDRMRenderNode(void) static void (*real_virCommandPassFD)(virCommandPtr cmd, int fd, unsigned int flags); -static const int testCommandPassSafeFDs[] = { 1730, 1731 }; +static const int testCommandPassSafeFDs[] = { 1730, 1731, 1732 }; void virCommandPassFD(virCommandPtr cmd, @@ -283,3 +283,12 @@ qemuBuildTPMOpenBackendFDs(const char *tpmdev G_GNUC_UNUSED, *cancelfd = 1731; return 0; } + + +int +qemuInterfaceVDPAConnect(virDomainNetDefPtr net G_GNUC_UNUSED) +{ + if (fcntl(1732, F_GETFD) != -1) + abort(); + return 1732; +} diff --git a/tests/qemuxml2argvtest.c b/tests/qemuxml2argvtest.c index 01839cb88c..9587e1f2f2 100644 --- a/tests/qemuxml2argvtest.c +++ b/tests/qemuxml2argvtest.c @@ -1446,6 +1446,7 @@ mymain(void) QEMU_CAPS_DEVICE_VFIO_PCI); DO_TEST_FAILURE("net-hostdev-fail", QEMU_CAPS_DEVICE_VFIO_PCI); + DO_TEST_CAPS_LATEST("net-vdpa"); DO_TEST("hostdev-pci-multifunction", QEMU_CAPS_KVM, diff --git a/tests/qemuxml2xmloutdata/net-vdpa.xml b/tests/qemuxml2xmloutdata/net-vdpa.xml new file mode 100644 index 0000000000..b362405c14 --- /dev/null +++ b/tests/qemuxml2xmloutdata/net-vdpa.xml @@ -0,0 +1,34 @@ +<domain type='qemu'> + <name>QEMUGuest1</name> + <uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid> + <memory unit='KiB'>219136</memory> + <currentMemory unit='KiB'>219136</currentMemory> + <vcpu placement='static'>1</vcpu> + <os> + <type arch='i686' machine='pc'>hvm</type> + <boot dev='hd'/> + </os> + <clock offset='utc'/> + <on_poweroff>destroy</on_poweroff> + <on_reboot>restart</on_reboot> + <on_crash>destroy</on_crash> + <devices> + <emulator>/usr/bin/qemu-system-i386</emulator> + <controller type='usb' index='0'> + <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x2'/> + </controller> + <controller type='ide' index='0'> + <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/> + </controller> + <controller type='pci' index='0' model='pci-root'/> + <interface type='vdpa'> + <mac address='52:54:00:95:db:c0'/> + <source dev='/dev/vhost-vdpa-0'/> + <model type='virtio'/> + <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/> + </interface> + <input type='mouse' bus='ps2'/> + <input type='keyboard' bus='ps2'/> + <memballoon model='none'/> + </devices> +</domain> diff --git a/tests/qemuxml2xmltest.c b/tests/qemuxml2xmltest.c index a07e2b7553..978babb110 100644 --- a/tests/qemuxml2xmltest.c +++ b/tests/qemuxml2xmltest.c @@ -494,6 +494,7 @@ mymain(void) DO_TEST("net-mtu", NONE); DO_TEST("net-coalesce", NONE); DO_TEST("net-many-models", NONE); + DO_TEST("net-vdpa", NONE); DO_TEST("serial-tcp-tlsx509-chardev", NONE); DO_TEST("serial-tcp-tlsx509-chardev-notls", NONE); diff --git a/tools/virsh-domain.c b/tools/virsh-domain.c index 286cf79671..10b396bcf0 100644 --- a/tools/virsh-domain.c +++ b/tools/virsh-domain.c @@ -1007,6 +1007,7 @@ cmdAttachInterface(vshControl *ctl, const vshCmd *cmd) case VIR_DOMAIN_NET_TYPE_MCAST: case VIR_DOMAIN_NET_TYPE_UDP: case VIR_DOMAIN_NET_TYPE_INTERNAL: + case VIR_DOMAIN_NET_TYPE_VDPA: case VIR_DOMAIN_NET_TYPE_LAST: vshError(ctl, _("No support for %s in command 'attach-interface'"), type); -- 2.26.2

2 3

[libvirt PATCH] docs: formatdomain: fix `since` tag
by Ján Tomko 27 Aug '20

27 Aug '20

Fix the `since` tag for the disk target. Signed-off-by: Ján Tomko <jtomko(a)redhat.com> --- Pushed as trivial. docs/formatdomain.rst | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/docs/formatdomain.rst b/docs/formatdomain.rst index 318e39177a..cb5ee8316f 100644 --- a/docs/formatdomain.rst +++ b/docs/formatdomain.rst @@ -2771,7 +2771,7 @@ paravirtualized driver is specified via the ``disk`` element. disks, and its value can be either "on" or "off", defaulting to "off". :since:`Since 0.0.3`; ``bus`` attribute :since:`since 0.4.3`; ``tray`` attribute :since:`since 0.9.11`; "usb" attribute value - :since:`since after 0.4.4`; "sata" attribute value :since: `since 0.9.7`; + :since:`since after 0.4.4`; "sata" attribute value :since:`since 0.9.7`; "removable" attribute value :since:`since 1.1.3` ``iotune`` The optional ``iotune`` element provides the ability to provide additional -- 2.26.2

1 0

[RFC] apparmor: add subprofile for virtiofsd
by Christian Ehrhardt 27 Aug '20

27 Aug '20

This is a continuation of https://www.redhat.com/archives/libvir-list/2020-August/msg00804.html https://www.redhat.com/archives/libvir-list/2020-August/msg00922.html It still has too many weak points left, but should be great as an RFC already. virtiofsd works for me using that profile, but we need to: - agree on common paths to expect for virtiofsd - get the post pivot_root rules under control --- virtiofsd runs as root and is reachable from the guest, to limit the exploit potential this adds a apparmor subprofile to virtiofsd as spawned by libvirt to limit it. Known TODOs: - rules after pivot_root need not to allow everything - settle on common paths with the community Signed-off-by: Christian Ehrhardt <christian.ehrhardt(a)canonical.com> --- src/security/apparmor/libvirt-qemu | 3 ++ src/security/apparmor/usr.sbin.libvirtd.in | 46 ++++++++++++++++++++++ 2 files changed, 49 insertions(+) diff --git a/src/security/apparmor/libvirt-qemu b/src/security/apparmor/libvirt-qemu index a03e9e2c94..668fc72f27 100644 --- a/src/security/apparmor/libvirt-qemu +++ b/src/security/apparmor/libvirt-qemu @@ -221,6 +221,9 @@ unix (send, receive) type=stream addr=none peer=(label=libvirtd), unix (send, receive) type=stream addr=none peer=(label=/usr/sbin/libvirtd), + # allow to connect to virtiofsd + unix (send, receive) type=stream addr=none peer=(label=libvirtd//virtiofsd), + # for gathering information about available host resources /sys/devices/system/cpu/ r, /sys/devices/system/node/ r, diff --git a/src/security/apparmor/usr.sbin.libvirtd.in b/src/security/apparmor/usr.sbin.libvirtd.in index 4518e8f865..f878398b4b 100644 --- a/src/security/apparmor/usr.sbin.libvirtd.in +++ b/src/security/apparmor/usr.sbin.libvirtd.in @@ -133,4 +133,50 @@ profile libvirtd @sbindir@/libvirtd flags=(attach_disconnected) { /usr/{lib,lib64,lib/qemu,libexec}/qemu-bridge-helper rmix, } + + # child profile for virtiofsd helper process + /usr/{lib,lib64,lib/qemu,libexec}/virtiofsd Cx -> virtiofsd, + profile virtiofsd flags=(attach_disconnected) { + #include <abstractions/base> + #include <abstractions/libvirt-qemu> + + capability sys_admin, + capability sys_resource, + + # init phase + / r, + mount options=(rw, rslave) -> /, + umount /, + mount options=(rw, nosuid, nodev, noexec, relatime) -> @{PROC}, + owner /proc/sys/fs/file-max r, + + # For communication/control from libvirtd + unix (send, receive) type=stream addr=none peer=(label=libvirtd), + signal (receive) set=("term") peer=/usr/sbin/libvirtd, + signal (receive) set=("term") peer=libvirtd, + owner /var/lib/libvirt/qemu/domain-*/fs[0-9]{[0-9],}-fs.pid w, + /var/lib/libvirt/qemu/domain-*/fs[0-9]{[0-9],}-fs.sock rw, + /var/lib/libvirt/qemu/ram/*/ram-node[0-9]{[0-9],} rw, + + # For communication with confined and unconfined guests + unix (send, receive) type=stream addr=none peer=(label=libvirt-[0-9a-f]*-[0-9a-f]*-[0-9a-f]*-[0-9a-f]*-[0-9a-f]*), + unix (send, receive) type=stream addr=none peer=(label=unconfined), + + /usr/{lib,lib64,lib/qemu,libexec}/virtiofsd rmix, + + # Common host paths to share from are allowed by default + # Further paths should be added as local override + # TODO - community to settle on a list of common paths to allow + owner /var/lib/libvirt/virtiofsd/*/ r, + mount options=(rw, bind) -> /var/lib/libvirt/virtiofsd/*/, + pivot_root /var/lib/libvirt/virtiofsd/*/, + + # TODO - after pivot_root the rules for the actual file access by the guest + # through virtiofsd would need to start with / which is too open + /** rw, + + # Site-specific additions and overrides. See local/README for details. + #include <local/usr.lib.qemu.virtiofsd> + } + } -- 2.28.0

2 1

[PATCH] meson: don't install sysconf files unconditionally
by Roman Bogorodskiy 27 Aug '20

27 Aug '20

There's no need to install sysconf files when init script installation was not requested, i.e. when configured with init_script=none. Signed-off-by: Roman Bogorodskiy <bogorodskiy(a)gmail.com> --- src/meson.build | 16 +++++++++------- 1 file changed, 9 insertions(+), 7 deletions(-) diff --git a/src/meson.build b/src/meson.build index d058cec2e4..5d8deaf548 100644 --- a/src/meson.build +++ b/src/meson.build @@ -858,13 +858,15 @@ if conf.has('WITH_LIBVIRTD') endif endif -foreach sysconf : sysconf_files - install_data( - sysconf['file'], - install_dir: sysconfdir / 'sysconfig', - rename: [ sysconf['name'] ], - ) -endforeach +if init_script != 'none' + foreach sysconf : sysconf_files + install_data( + sysconf['file'], + install_dir: sysconfdir / 'sysconfig', + rename: [ sysconf['name'] ], + ) + endforeach +endif if conf.has('WITH_DTRACE_PROBES') custom_target( -- 2.27.0

2 1

[PATCH RFC v3 00/14] Add riscv kvm accel support
by Yifei Jiang 27 Aug '20

27 Aug '20

This series adds both riscv32 and riscv64 kvm support, and implements migration based on riscv. It is based on temporarily unaccepted kvm: https://github.com/kvm-riscv/linux Compared to RFC v2, the migration is supported in this series. The new added migration feature also requires the following patches: [1] [PATCH RFC 0/2] Add log dirty support https://www.mail-archive.com/linux-kernel@vger.kernel.org/msg2284945.html [2] [PATCH] target/riscv: raise exception to HS-mode at get_physical_address https://patchew.org/QEMU/20200824084158.1769-1-jiangyifei@huawei.com/ Several steps to use this: 1. Build emulation $ ./configure --target-list=riscv64-softmmu $ make -j$(nproc) 2. Build kernel https://github.com/kvm-riscv/linux 3. Build QEMU VM I cross built in riscv toolchain. $ PKG_CONFIG_LIBDIR=<toolchain pkgconfig path> $ export PKG_CONFIG_SYSROOT_DIR=<toolchain sysroot path> $ ./configure --target-list=riscv64-softmmu --enable-kvm \ --cross-prefix=riscv64-linux-gnu- --disable-libiscsi --disable-glusterfs \ --disable-libusb --disable-usb-redir --audio-drv-list= --disable-opengl \ --disable-libxml2 $ make -j$(nproc) 4. Start emulation $ ./qemu-system-riscv64 -M virt -m 4096M -cpu rv64,x-h=true -nographic \ -name guest=riscv-hyp,debug-threads=on \ -smp 4 \ -bios ./fw_jump.bin \ -kernel ./Image \ -drive file=./hyp.img,format=raw,id=hd0 \ -device virtio-blk-device,drive=hd0 \ -append "root=/dev/vda rw console=ttyS0 earlycon=sbi" 5. Start kvm-acceled QEMU VM in emulation $ ./qemu-system-riscv64 -M virt,accel=kvm -m 1024M -cpu host -nographic \ -name guest=riscv-guset \ -smp 2 \ -bios none \ -kernel ./Image \ -drive file=./guest.img,format=raw,id=hd0 \ -device virtio-blk-device,drive=hd0 \ -append "root=/dev/vda rw console=ttyS0 earlycon=sbi" This following link describes the details about live migration steps: https://gitee.com/openeuler/qemu/wikis/Live%20migration?sort_id=2767831 Changes since RFC v2 1. Fix checkpatch error at target/riscv/sbi_ecall_interface.h. 2. Add riscv migration support. Changes since RFC v1 1. Add separate SBI ecall interface header. 2. Add riscv32 kvm accel support. Yifei Jiang (14): linux-header: Update linux/kvm.h target/riscv: Add target/riscv/kvm.c to place the public kvm interface target/riscv: Implement function kvm_arch_init_vcpu target/riscv: Implement kvm_arch_get_registers arget/riscv: Implement kvm_arch_put_registers target/riscv: Support start kernel directly by KVM hw/riscv: PLIC update external interrupt by KVM when kvm enabled target/riscv: Handler KVM_EXIT_RISCV_SBI exit target/riscv: Add host cpu type target/riscv: Add sifive_plic vmstate target/riscv: Support riscv cpu vmstate target/riscv: Add kvm_riscv_get/put_regs_timer target/riscv: Implement virtual time adjusting with vm state changing target/riscv: Support virtual time context synchronization configure | 1 + hw/riscv/sifive_plic.c | 55 ++- hw/riscv/virt.c | 8 + include/hw/riscv/sifive_plic.h | 1 + linux-headers/linux/kvm.h | 8 + target/riscv/cpu.c | 41 +- target/riscv/cpu.h | 10 + target/riscv/kvm.c | 599 +++++++++++++++++++++++++++++ target/riscv/kvm_riscv.h | 25 ++ target/riscv/meson.build | 1 + target/riscv/sbi_ecall_interface.h | 72 ++++ 11 files changed, 809 insertions(+), 12 deletions(-) create mode 100644 target/riscv/kvm.c create mode 100644 target/riscv/kvm_riscv.h create mode 100644 target/riscv/sbi_ecall_interface.h -- 2.19.1

1 14

[libvirt PATCH v2 0/2] Eliminate old tap/macvtap teardown stomping on new tap setup
by Laine Stump 27 Aug '20

27 Aug '20

V1 is here: https://www.redhat.com/archives/libvir-list/2020-August/msg00756.html The problem and this solution are very well described in patches 2 and 3, but in short - because we (libvirt for macvtap, the kernel for tap) always try to assign the lowest numbered names possible to macvtap and tap devices, we sometimes create a new tap for a new guest using the same name as an old tap for an old guest that is shutting down simultaneous to setting up the new guest/tap. This can lead to the old guest teardown stomping on the new guest setup. This is the problem that the authors were attempting to solve in these two patches sent earlier in the summer: https://www.redhat.com/archives/libvir-list/2020-June/msg00481.html https://www.redhat.com/archives/libvir-list/2020-June/msg00525.html and also in this V2 patch, which Bingsong Si sent in response to my poorly-thought-out advice in my response to his original patch: https://www.redhat.com/archives/libvir-list/2020-June/msg00755.html Somewhere during that discussion, danpb suggested that in order to *really* solve the problem, we should use our own counter for auto-generated tap device names (instead of relying on the kernel) and just never re-use a name until the counter rolls over. That's essentially what these two patches do. One possibly undesirable side effect of this (and the other) patch is that the longer a host is running without reboot, the higher the numbers tap device names will get. While users are accustomed to always seeing vnet0 and vnet1, they may be a bit surprised to now see vnet39283 or macvtap735. It has been pointed out to me (again by danpb) that the same thing happened with PIDs a few years ago, and while it looked strange at first, everyone is now accustomed to it. Changes from V1: Patch 1 from V1 was removed - everything it changed is now removed/replaced in the new Patch 1 (which was Patch 2 in V1). And so of course, what was Patch 3 in V1 is now Patch 2 in V2. I eliminated the old bitmap reservation system in the macvtap patch (Patch 1) rather than adding on top of it as I had in V1 - it really was beyond redundant and unnecessary, and just clouded up the whole situation. This also allowed me to get rid of the 8192 limit (which was there only to limit the size of the virBitmap, which we no longer need), and allow the device names to count up until they overflow either the ifname[IFNAMSIZ] buffer, or reach INT_MAX. Likewise, I modified the standard tap patch to remove the artificial maximum of 99999, and just let it count up until it overflows. (Jano suggested that I should have a test case to test the entire range, but I don't think anyone would be happy with that. If I was masochistic and wanted to mock a bunch of virNetDev functions I could artificially test it by bumping up the counters with calls to the virNetDevTapReserveName() function, but it's 1AM. I did test the rollover of both cases (macvtap, where it overflows the buffer size first, and standard tap where it overflow the 32 bit int first) with a one-off build that started the counter just a few below the overflow point, and it does work correctly.) Laine Stump (2): util: replace macvtap name reservation bitmap with a simple counter util: assign tap device names using a monotonically increasing integer src/libvirt_private.syms | 2 +- src/libxl/libxl_driver.c | 2 +- src/lxc/lxc_process.c | 2 +- src/qemu/qemu_process.c | 22 +- src/util/virnetdevmacvlan.c | 402 +++++++++++++----------------------- src/util/virnetdevmacvlan.h | 6 +- src/util/virnetdevtap.c | 108 +++++++++- src/util/virnetdevtap.h | 4 + 8 files changed, 275 insertions(+), 273 deletions(-) -- 2.26.2

4 9

[PATCH] src/meson: add module name_suffix as 'so'
by Scott Shambarger 26 Aug '20

26 Aug '20

driver.c and locking/lock_manager.c both hardcode ".so" to module filenames. In meson, MacOS bundles (loadable objects) default to using ".dylib" - adding name_suffix as "so" will therefore align the code with all builds (no need to handle windows as it doesn't support libvirtd). Signed-off-by: Scott Shambarger <scott-libvirt(a)shambarger.net> --- src/meson.build | 1 + 1 file changed, 1 insertion(+) diff --git a/src/meson.build b/src/meson.build index 73ac99f01e..73986401c9 100644 --- a/src/meson.build +++ b/src/meson.build @@ -567,6 +567,7 @@ foreach module : virt_modules module['name'], module.get('sources', []), name_prefix: module.get('name_prefix', 'lib'), + name_suffix: 'so', include_directories: [ conf_inc_dir, module.get('include', []), -- 2.24.3 (Apple Git-128)

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