PowerISA allows processors to run VMs in binary compatibility ("compat")
mode supporting an older version of ISA. QEMU has recently added support to
explicitly denote a VM running in compatibility mode through commit 6d9412ea
& 8dfa3a5e85. Now, a "compat" mode VM can be run by invoking this qemu
commandline on a POWER8 host: -cpu host,compat=power7.
This patch allows libvirt to exploit cpu mode 'host-model' to describe this
new mode for PowerKVM guests. For example, when a user wants to request a
power7 vm to run in compatibility mode on a Power8 host, this can be
described in XML as follows :
<cpu mode='host-model'>
<model>power7</model>
</cpu>
Signed-off-by: Prerna Saxena <prerna@linux.vnet.ibm.com>
Signed-off-by: Li Zhang <zhlcindy@linux.vnet.ibm.com>
Signed-off-by: Pradipta Kr. Banerjee <bpradip@in.ibm.com>
Acked-by: Michal Privoznik <mprivozn@redhat.com>
This adds support for PowerPC Little Endian architecture.,
and allows libvirt to spawn VMs based on 'ppc64le' architecture.
Signed-off-by: Pradipta Kr. Banerjee <bpradip@in.ibm.com>
Signed-off-by: Prerna Saxena <prerna@linux.vnet.ibm.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Extending the iothread disk support from pci to pci and ccw.
Signed-off-by: Boris Fiuczynski <fiuczy@linux.vnet.ibm.com>
Reviewed-by: Viktor Mihajlovski <mihajlov@linux.vnet.ibm.com>
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Finding the right type of disk should check for virtio as bus and
pci as device address type.
Signed-off-by: Boris Fiuczynski <fiuczy@linux.vnet.ibm.com>
Reviewed-by: Viktor Mihajlovski <mihajlov@linux.vnet.ibm.com>
This is a reaction to Michal's fix [1] for non-NUMA systems that also
splits out conf/ out of util/ because libvirt_util shouldn't require
libvirt_conf if it is the other way around. This particular use case
worked, but we're trying to avoid it as mentioned [2], many times.
The only functions from virnuma.c that needed numatune_conf were
virDomainNumatuneNodesetIsAvailable() and virNumaSetupMemoryPolicy().
The first one should be in numatune_conf as it works with
virDomainNumatune, the second one just needs nodeset and mode, both of
which can be passed without the need of numatune_conf.
Apart from fixing that, this patch also fixes recently added
code (between commits d2460f85^..5c8515620) that doesn't support
non-contiguous nodesets. It uses new function
virNumaNodesetIsAvailable(), which doesn't need a stub as it doesn't use
any libnuma functions, to check if every specified nodeset is available.
[1] https://www.redhat.com/archives/libvir-list/2014-November/msg00118.html
[2] http://www.redhat.com/archives/libvir-list/2011-June/msg01040.html
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
Since there was a valid note to patch 43b67f2e about the best spot to
check for bandwidth set call while having libvirt daemon run in session
mode, this patch reverts previous changes dealing with bandwith
(also reverts adding variable @cfg in qemuDomainGetNumaParameters which
does not have any use at the moment, but getting and unreferencing
driver's config) in qemu_driver.c and qemu_command.c. There will be
another patch in the series which introduces the fix itself.
Domain memory elements such as max_balloon and cur_balloon are
implemented as 'unsigned long long', whereas the 'memory' element
in NUMA cells is implemented as 'unsigned int'.
Use the same data type (unsigned long long) for 'memory' element
in NUMA cells.
Signed-off-by: Prerna Saxena <prerna@linux.vnet.ibm.com>
There was no check for 'nodeset' attribute in numatune-related
elements. This patch adds validation that any nodeset specified does
not exceed maximum host node.
Signed-off-by: Chen Fan <chen.fan.fnst@cn.fujitsu.com>
Particularly in qemuBuildNumaArgStr(), there was a need for the advice
due to memory backing, which needs to know the nodeset it will be pinned
to. With newer qemu this caused the following error when starting
domain:
error: internal error: Advice from numad is needed in case of
automatic numa placement
even when starting perfectly valid domain, e.g.:
...
<vcpu placement='auto'>4</vcpu>
<numatune>
<memory mode='strict' placement='auto'/>
</numatune>
<cpu>
<numa>
<cell id='0' cpus='0' memory='524288'/>
<cell id='1' cpus='1' memory='524288'/>
</numa>
</cpu>
...
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1138545
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
Tuning NUMA or network interface parameters requires root
privileges to manage cgroups. Thus an attempt to set some of these
parameters in session mode on a running domain should be invalid
followed by an error. An example might be memory tuning which raises
an error in such case.
The following behavior in session mode will be present after applying
this patch:
Tuning | SET | GET |
----------|---------------|--------|
NUMA | shut off only | always |
Memory | never | never |
Interface | never | always |
Resolves https://bugzilla.redhat.com/show_bug.cgi?id=1126762
This patch implements support for the ivshmem device in QEMU.
Signed-off-by: Maxime Leroy <maxime.leroy@6wind.com>
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
Right now when building the qemu command line, we try to do various
unconditional validations of the guest CPU against the host CPU. However
this checks are overly applied. The only time we should use the checks
are:
- The user requests host-model/host-passthrough, or
- When KVM is requsted. CPU features requested in TCG mode are always
emulated by qemu and are independent of the host CPU, so no host CPU
checks should be performed.
Right now if trying to specify a CPU for arm on an x86 host, it attempts
to do non-sensical validation and falls over.
Switch all the test cases that were intending to test CPU validation to
use KVM, so they continue to test the intended code.
Amend some aarch64 XML tests with a CPU model, to ensure things work
correctly.
In the function at one place we check if def->cpu is NULL prior
to accessing def->cpu->ncells. Then, later in the code,
def->cpu->ncells is accessed directly, without the check. This
makes coverity unhappy, because the first check makes it think
def->cpu can be NULL. However, the function is not called if
def->cpu is NULL. Therefore, remove the first check and hopefully
make coverity cheer again.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
This patch adds support for RDMA protocol in migration URIs.
USAGE: $ virsh migrate --live --migrateuri rdma://hostname domain qemu+ssh://hostname/system
Since libvirt runs QEMU in a pretty restricted environment, several
files needs to be added to cgroup_device_acl (in qemu.conf) for QEMU to
be able to access the host's infiniband hardware. Full documenation of
the feature can be found on QEMU wiki:
http://wiki.qemu.org/Features/RDMALiveMigration
Signed-off-by: Michael R. Hines <mrhines@us.ibm.com>
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
commit 72f919f558 introduced an user
friendly error message when trying to use IDE disks as readonly.
Do the same thing for the SATA bus.
Closes: https://bugzilla.redhat.com/show_bug.cgi?id=1112939
Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
We are not detecting the presence of FIPS from QEMU, but from procfs and
that means it's not QEMU capability. It was decided that we will pass
this flag to QEMU even if it's not supported by old QEMU binaries.
This patch also reverts changes done by commit a21cfb0f to
qemucapabilitestest and implements a new test case in qemuxml2argvtest.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1135431
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
Currently, build with clang fails with:
CC qemu/libvirt_driver_qemu_impl_la-qemu_command.lo
qemu/qemu_command.c:6580:58: error: implicit conversion from enumeration type
'virMemAccess' to different enumeration type 'virTristateSwitch'
[-Werror,-Wenum-conversion]
virTristateSwitch memAccess = def->cpu->cells[i].memAccess;
~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~^~~~~~~~~
1 error generated.
Fix that by using virMemAccess instead of virTristateSwitch.
https://bugzilla.redhat.com/show_bug.cgi?id=1135396
There are two ways how to tell qemu to use huge pages. The first one
is suitable for domains with NUMA nodes: the path to hugetlbfs mount
is appended to NUMA node definition on the command line. The second
one is suitable for UMA domains: here there's this global '-mem-path'
argument that accepts path to the hugetlbfs mount point. However, the
latter case was not used for all the cases that it should be. For
instance:
<memoryBacking>
<hugepages>
<page size='2048' unit='KiB' nodeset='0'/>
</hugepages>
</memoryBacking>
didn't trigger the '-mem-path' so the huge pages - despite being
configured - were not used at all.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
As of 136ad4974 it is possible to specify different huge pages per
guest NUMA node. However, there's no check if nodeset specified in
./hugepages/page contains only those guest NUMA nodes that exist.
In other words with current code it is possible to define meaningless
combination:
<memoryBacking>
<hugepages>
<page size='1048576' unit='KiB' nodeset='0,2-3'/>
<page size='2048' unit='KiB' nodeset='1,4'/>
</hugepages>
</memoryBacking>
<vcpu placement='static'>4</vcpu>
<cpu>
<numa>
<cell id='0' cpus='0' memory='1048576'/>
<cell id='1' cpus='1' memory='1048576'/>
<cell id='2' cpus='2' memory='1048576'/>
<cell id='3' cpus='3' memory='1048576'/>
</numa>
</cpu>
Notice the node 4 in <hugepages/>?
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
qemu for IBM Power processor architecture is adding functionality for
supporting multiple 'pseries' machine type versions, each with different
capabilities. This patch is for supporting the same
Signed-off-by: Pradipta Kr. Banerjee <bpradip@in.ibm.com>
QEMU now supports UEFI with the following command line:
-drive file=/usr/share/OVMF/OVMF_CODE.fd,if=pflash,format=raw,unit=0,readonly=on \
-drive file=/usr/share/OVMF/OVMF_VARS.fd,if=pflash,format=raw,unit=1 \
where the first line reflects <loader> and the second one <nvram>.
Moreover, these two lines obsolete the -bios argument.
Note that UEFI is unusable without ACPI. This is handled properly now.
Among with this extension, the variable file is expected to be
writable and hence we need security drivers to label it.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Acked-by: Laszlo Ersek <lersek@redhat.com>
Up to now, users can configure BIOS via the <loader/> element. With
the upcoming implementation of UEFI this is not enough as BIOS and
UEFI are conceptually different. For instance, while BIOS is ROM, UEFI
is programmable flash (although all writes to code section are
denied). Therefore we need new attribute @type which will
differentiate the two. Then, new attribute @readonly is introduced to
reflect the fact that some images are RO.
Moreover, the OVMF (which is going to be used mostly), works in two
modes:
1) Code and UEFI variable store is mixed in one file.
2) Code and UEFI variable store is separated in two files
The latter has advantage of updating the UEFI code without losing the
configuration. However, in order to represent the latter case we need
yet another XML element: <nvram/>. Currently, it has no additional
attributes, it's just a bare element containing path to the variable
store file.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Acked-by: Laszlo Ersek <lersek@redhat.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
qemu now checks for invalid address type for a panic device, which is
currently implemented only to use ISA address type, thus rejecting
any other options, except for leaving XML attributes blank, in that case,
defaults are used (this behaviour remains the same from earlier verions).
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1138125
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
Currently, there is one flag passed in during macvtap creation
(withTap) -- Let's convert this field to an unsigned int flag
field for future expansion.
Signed-off-by: Matthew Rosato <mjrosato@linux.vnet.ibm.com>
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
For virtio-blk-pci disks with the disk iothread attribute that are
running the correct emulator, add the "iothread=iothread#" to the
-device command line in order to enable iothreads for the disk as
long as the command is available, the disk iothread value provided is
valid, and is supported for the disk device being added
Add a new capability to ensure the iothreads feature exists for the qemu
emulator being run - requires the "query-iothreads" QMP command. Using the
domain XML add correspoding command argument in order to generate the
threads. The iothreads will use a name space "iothread#" where, the
future patch to add support for using an iothread to a disk definition to
merely define which of the available threads to use.
Add tests to ensure the xml/argv processing is correct. Note that no
change was made to qemuargv2xmltest.c as processing the -object element
would require knowing more than just iothreads.
One useless warning, but the other one rather pertinent. On entry
the 'trans' variable is initialized to VIR_DOMAIN_DISK_TRANS_DEFAULT.
When the "trans" was found in the parsing loop it def->geometry.trans
was assigned to the return from virDomainDiskGeometryTransTypeFromString
and then 'trans' was used to do the comparison to see if it was valid.
So remove 'trans' and use def->geometry.trans properly
In qemuNetworkIfaceConnect() a call to virNetDevBandwidthSet() is
made where the function prototype requires the first parameter
(net->ifname) to be non NULL. Coverity complains that the subsequent
non NULL check for net->ifname prior to the next call gets flagged as
an unnecessary check. Resolve by removing the extra check
According to docs/schemas/domaincommon.rng and _virDomainBlockIoTuneInfo
all the iotune values are interpreted as unsigned long long, however
according to qemu_monitor_json.c, qemu silently truncates numbers
larger than LLONG_MAX. There's really not much of a usage for such
large numbers anyway yet. This patch provides the same overflow
check during a domain start as it does during setting
a blkdeviotune element in qemu_driver.c and thus reports an error when
a larger number than LLONG_MAX is detected.
https://bugzilla.redhat.com/show_bug.cgi?id=1131876
QEMU 2.1 added support for the kvm=off option to the -cpu command,
allowing the KVM hypervisor signature to be hidden from the guest.
This enables disabling of some paravirualization features in the
guest as well as allowing certain drivers which test for the
hypervisor to load. Domain XML syntax is as follows:
<domain type='kvm>
...
<features>
...
<kvm>
<hidden state='on'/>
</kvm>
</features>
...
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
https://bugzilla.redhat.com/show_bug.cgi?id=1078126
Using 'virsh attach-device --config' (or --persistent) to attach a
file backed lun device will succeed; however, subsequent domain restarts
will result in failure because the configuration of a file backed lun
is not supported.
Although allowing 'illegal configurations' is something that can be
allowed, it may not be practical in this case. Generally, when attaching
a device to a domain means the domain must be running. A way around
this is using the --config (or --persistent) option. When an attach
is done to a running domain, a temporary configuration is modified
first followed by the live update. The live update will make a number
of disk validity checks when building the qemu command to attach the
disk. If any fail, then change is rejected.
Rather than allow a potentially illegal combination, adjust the code
in the configuration path to make the same checks as the running path
will make with respect to disk validity checks. This way we avoid
having the potential for some subsequent start/reboot to fail because
an illegal combination was allowed.
NB: The live path still checks the configuration since it is possible
to just do --live guest modification...
https://bugzilla.redhat.com/show_bug.cgi?id=1095636
When starting up the domain the domain's NICs are allocated. As of
1f24f682 (v1.0.6) we are able to use multiqueue feature on virtio
NICs. It breaks network processing into multiple queues which can be
processed in parallel by different host CPUs. The queues are, however,
created by opening /dev/net/tun several times. Unfortunately, only the
first FD in the row is labelled so when turning the multiqueue feature
on in the guest, qemu will get AVC denial. Make sure we label all the
FDs needed.
Moreover, the default label of /dev/net/tun doesn't allow
attaching a queue:
type=AVC msg=audit(1399622478.790:893): avc: denied { attach_queue }
for pid=7585 comm="qemu-kvm"
scontext=system_u:system_r:svirt_t:s0:c638,c877
tcontext=system_u:system_r:virtd_t:s0-s0:c0.c1023
tclass=tun_socket
And as suggested by SELinux maintainers, the tun FD should be labeled
as svirt_t. Therefore, we don't need to adjust any range (as done
previously by Guannan in ae368ebf) rather set the seclabel of the
domain directly.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
In commit 45ad1adb I added a nicer message for tunings that need
cgroups when unavailable (unprivileged), but I added this check for
I/O tuning of block devices, which doesn't need cgroups, because it is
done by QEMU, so let's fix that.
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
Fix a comment in virDomainAuditNetDevice.
Fix a typo in comment of qemuPhysIfaceConnect which is
the caller of virDomainAuditNetDevice.
Signed-off-by: Wang Rui <moon.wangrui@huawei.com>
Otherwise this beautiful error would be overwritten when
the function is called with a really high rate number:
2014-07-28 12:51:47.920+0000: 2304: error : virCommandWait:2399 :
internal error: Child process (/sbin/tc class add dev vnet0 parent 1:
classid 1:1 htb rate 4294968kbps) unexpected exit status 1: Illegal "rate"
Usage: ... qdisc add ... htb [default N] [r2q N]
default minor id of class to which unclassified packets are sent {0}
r2q DRR quantums are computed as rate in Bps/r2q {10}
debug string of 16 numbers each 0-3 {0}
... class add ... htb rate R1 [burst B1] [mpu B] [overhead O]
[prio P] [slot S] [pslot PS]
[ceil R2] [cburst B2] [mtu MTU] [quantum Q]
rate rate allocated to this class (class can still borrow)
burst max bytes burst which can be accumulated during idle period {computed}
mpu minimum packet size used in rate computations
overhead per-packet size overhead used in rate computations
linklay adapting to a linklayer e.g. atm
ceil definite upper class rate (no borrows) {rate}
cburst burst but for ceil {computed}
mtu max packet size we create rate map for {1600}
prio priority of leaf; lowe
https://bugzilla.redhat.com/show_bug.cgi?id=1043735
If PCI passthrough type is not supported, we should error out rather than
continue building the command line.
When starting a domain, the type has been already checked by
qemuPrepareHostdevPCICheckSupport() before building qemu command line,
so the problem doesn't emerge.
But when coverting a domain xml without specifying passthrough type explictly
to qemu arg, we will get a malformed command line.
the xml:
<hostdev mode='subsystem' type='pci' managed='yes'>
<source>
<address domain='0x0001' bus='0x03' slot='0x00' function='0x0'/>
</source>
<address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/>
</hostdev>
the converted command line:
-device ,host=0001:03:00.0,id=hostdev0,bus=pci.0,addr=0x5
After this patch, virsh gives an error message:
virsh domxml-to-native qemu-argv /tmp/tmp.xml
error: internal error: invalid PCI passthrough type 'default'
Signed-off-by: Hu Tao <hutao@cn.fujitsu.com>
