Rename qemu_getrampagesize() to qemu_minrampagesize(). While at it,
properly rename find_max_supported_pagesize() to
find_min_backend_pagesize().
s390x is actually interested into the maximum ram pagesize, so
introduce and use qemu_maxrampagesize().
Add a TODO, indicating that looking at any mapped memory backends is not
100% correct in some cases.
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20190417113143.5551-3-david@redhat.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Right now we configure the pagesize quite early, when initializing KVM.
This is long before system memory is actually allocated via
memory_region_allocate_system_memory(), and therefore memory backends
marked as mapped.
Instead, let's configure the maximum page size after initializing
memory in s390_memory_init(). cap_hpage_1m is still properly
configured before creating any CPUs, and therefore before configuring
the CPU model and eventually enabling CMMA.
This is not a fix but rather a preparation for the future, when initial
memory might reside on memory backends (not the case for s390x right now)
We will replace qemu_getrampagesize() soon by a function that will always
return the maximum page size (not the minimum page size, which only
works by pure luck so far, as there are no memory backends).
Acked-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20190417113143.5551-2-david@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Latest systems and host kernels support mepoch, which is a
feature that was meant to be supported for z14 GA1 from the
get-go. Let's copy it to the z14 GA1 default CPU model.
Machines s390-ccw-virtio-3.1 and older will retain the old CPU
models and will not provide this bit nor the extended PTFF
functions in the default model.
Signed-off-by: Collin Walling <walling@linux.ibm.com>
Message-Id: <20190212011657.18324-2-walling@linux.ibm.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
As we now always have PCI support, let's add it to the "qemu" CPU model,
taking care of backwards compatibility.
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20190212112323.15904-1-david@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
We tried to make pci support optional on s390x in the past;
unfortunately, we still require the s390 phb to be created
unconditionally due to backwards compatibility issues.
Instead of sinking more effort into this (including compat
handling for older machines etc.) for non-obvious gains, let's
just make CONFIG_PCI something that is always set on s390x.
Note that you can still fence off pci for the _guest_ if you
provide a cpu model without the zpci feature.
Message-Id: <20190211113255.3837-1-cohuck@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Instead of verbose arrays with 4 lines for each entry, make each
entry take only one line. This makes long arrays that couldn't
fit in the screen become short and readable.
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Message-Id: <20190107193020.21744-4-ehabkost@redhat.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Similarly to accel properties, move compat properties out of globals
registration, and apply the machine compat properties during
device_post_init().
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Acked-by: Eduardo Habkost <ehabkost@redhat.com>
Introduces the base object model for virtualizing AP devices.
Signed-off-by: Tony Krowiak <akrowiak@linux.ibm.com>
Tested-by: Pierre Morel <pmorel@linux.ibm.com>
Acked-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Halil Pasic <pasic@linux.ibm.com>
Tested-by: Christian Borntraeger <borntraeger@de.ibm.com>
Message-Id: <20181010170309.12045-5-akrowiak@linux.ibm.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
As the kernel has no way of disallowing the start of a huge page
backed VM, we can migrate a running huge backed VM to a host that has
no huge page KVM support.
Let's glue huge page support support to the 3.1 machine, so we do not
migrate to a destination host that doesn't have QEMU huge page support
and can stop migration if KVM doesn't indicate support.
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Message-Id: <20180928093435.198573-1-frankja@linux.ibm.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
This option has been deprecated for two releases; remove it.
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Acked-by: Halil Pasic <pasic@linux.ibm.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Let's treat this like a separate device. TCG will have to store the
actual state/time later on.
Include cpu-qom.h in kvm_s390x.h (due to S390CPU) to compile tod-kvm.c.
Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20180627134410.4901-4-david@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Most systems and host kernels provide the necessary building blocks for
bpb and ppa15. We can reverse the logic and default enable those
features, while still allowing to disable it via cpu model.
So let us add bpb and ppa15 to z196 and later default CPU model for the
qemu 3.0 machine. (like -cpu z13). Older machine types (e.g.
s390-ccw-virtio-2.12) will retain the old value and not provide those
bits in the default model.
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Message-Id: <20180626123830.18282-1-borntraeger@de.ibm.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Rename the 2.13 machines to match the number we're going to
use for the next release.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-id: 20180522104000.9044-4-peter.maydell@linaro.org
Calling pause_all_vcpus()/resume_all_vcpus() from a VCPU thread might
not be the best idea. As pause_all_vcpus() temporarily drops the qemu
mutex, two parallel calls to pause_all_vcpus() can be active at a time,
resulting in a deadlock. (either by two VCPUs or by the main thread and a
VCPU)
Let's handle it via the main loop instead, as suggested by Paolo. If we
would have two parallel reset requests by two different VCPUs at the
same time, the last one would win.
We use the existing ipl device to handle it. The nice side effect is
that we can get rid of reipl_requested.
This change implies that all reset handling now goes via the common
path, so "no-reboot" handling is now active for all kinds of reboots.
Let's execute any CPU initialization code on the target CPU using
run_on_cpu.
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20180424101859.10239-1-david@redhat.com>
Acked-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
The consoles ("sclpconsole" and "sclplmconsole") can only be configured
with "-device" and "-chardev" so far. Other machines use the convenience
option "-serial" to configure the default consoles, even for virtual
consoles like spapr-vty on the pseries machine. So let's support this
option on s390x, too. This way we can easily enable the serial console
here again with "-nodefaults", for example:
qemu-system-s390x -no-shutdown -nographic -nodefaults -serial mon:stdio
... which is way shorter than typing:
qemu-system-s390x -no-shutdown -nographic -nodefaults \
-chardev stdio,id=c1,mux=on -device sclpconsole,chardev=c1 \
-mon chardev=c1
The -serial parameter can also be used if you only want to see the QEMU
monitor on stdio without using -nodefaults, but not the console output.
That's something that is pretty impossible with the current code today:
qemu-system-s390x -no-shutdown -nographic -serial none
While we're at it, this patch also maps the second -serial option to the
"sclplmconsole", so that there is now an easy way to configure this second
console on s390x, too, for example:
qemu-system-s390x -no-shutdown -nographic -serial null -serial mon:stdio
Additionally, the new code is also smaller than the old one and we have
less s390x-specific code in vl.c :-)
I've also checked that migration still works as expected by migrating
a guest with console output back and forth between a qemu-system-s390x
that has this patch and an instance without this patch.
Signed-off-by: Thomas Huth <thuth@redhat.com>
Message-Id: <1524754794-28005-1-git-send-email-thuth@redhat.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
The string returned by object_property_get_str() is dynamically allocated.
Fixes: 3c4e9baacf
Signed-off-by: Greg Kurz <groug@kaod.org>
Message-Id: <152231460685.69730.14860451936216690693.stgit@bahia.lan>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Until 67915de9f0 ("s390x/event-facility: variable-length event masks")
we only supported sclp event masks with a size of exactly 4 bytes, even
though the architecture allows the guests to set up sclp event masks
from 1 to 1021 bytes in length.
After that patch, the behaviour was almost compliant, but some issues
were still remaining, in particular regarding the handling of selective
reads and migration.
When setting the sclp event mask, a mask size is also specified. Until
now we only considered the size in order to decide which bits to save
in the internal state. On the other hand, when a guest performs a
selective read, it sends a mask, but it does not specify a size; the
implied size is the size of the last mask that has been set.
Specifying bits in the mask of selective read that are not available in
the internal mask should return an error, and bits past the end of the
mask should obviously be ignored. This can only be achieved by keeping
track of the lenght of the mask.
The mask length is thus now part of the internal state that needs to be
migrated.
This patch fixes the handling of selective reads, whose size will now
match the length of the event mask, as per architecture.
While the default behaviour is to be compliant with the architecture,
when using older machine models the old broken behaviour is selected
(allowing only masks of size exactly 4), in order to be able to migrate
toward older versions.
Fixes: 67915de9f0 ("s390x/event-facility: variable-length event masks")
Signed-off-by: Claudio Imbrenda <imbrenda@linux.vnet.ibm.com>
Message-Id: <1519407778-23095-2-git-send-email-imbrenda@linux.vnet.ibm.com>
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Right now it is possible to crash QEMU for s390x by providing e.g.
-numa node,nodeid=0,cpus=0-1
Problem is, that numa.c uses mc->cpu_index_to_instance_props as an
indicator whether NUMA is supported by a machine type. We don't
implement NUMA for s390x ("topology") yet. However we need
mc->cpu_index_to_instance_props for query-cpus.
So let's fix this case by also checking for mc->get_default_cpu_node_id,
which will be needed by machine_set_cpu_numa_node().
qemu-system-s390x: -numa node,nodeid=0,cpus=0-1: NUMA is not supported by
this machine-type
While at it, make s390_cpu_index_to_props() look like on other
architectures.
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20180227110255.20999-1-david@redhat.com>
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
The file name of the netboot binary is currently hard-coded to
"s390-netboot.img", without a possibility for the user to select
an alternative firmware image here. That's unfortunate, especially
since the basics are already there: The filename is a property of
the s390-ipl device. So we just have to add a check whether the user
already provided the property and only set the default if the string
is still empty. Now it is possible to select a different firmware
image with "-global s390-ipl.netboot_fw=/path/to/s390-netboot.img".
Signed-off-by: Thomas Huth <thuth@redhat.com>
Message-Id: <1519731154-3127-1-git-send-email-thuth@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Presently s390x is the only architecture not exposing specific
CPU information via QMP query-cpus. Upstream discussion has shown
that it could make sense to report the architecture specific CPU
state, e.g. to detect that a CPU has been stopped.
With this change the output of query-cpus will look like this on
s390:
[
{"arch": "s390", "current": true,
"props": {"core-id": 0}, "cpu-state": "operating", "CPU": 0,
"qom_path": "/machine/unattached/device[0]",
"halted": false, "thread_id": 63115},
{"arch": "s390", "current": false,
"props": {"core-id": 1}, "cpu-state": "stopped", "CPU": 1,
"qom_path": "/machine/unattached/device[1]",
"halted": true, "thread_id": 63116}
]
This change doesn't add the s390-specific data to HMP 'info cpus'.
A follow-on patch will remove all architecture specific information
from there.
Signed-off-by: Viktor Mihajlovski <mihajlov@linux.vnet.ibm.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <1518797321-28356-2-git-send-email-mihajlov@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
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Merge remote-tracking branch 'remotes/armbru/tags/pull-misc-2018-02-07-v4' into staging
Miscellaneous patches for 2018-02-07
# gpg: Signature made Fri 09 Feb 2018 12:52:51 GMT
# gpg: using RSA key 3870B400EB918653
# gpg: Good signature from "Markus Armbruster <armbru@redhat.com>"
# gpg: aka "Markus Armbruster <armbru@pond.sub.org>"
# Primary key fingerprint: 354B C8B3 D7EB 2A6B 6867 4E5F 3870 B400 EB91 8653
* remotes/armbru/tags/pull-misc-2018-02-07-v4:
Move include qemu/option.h from qemu-common.h to actual users
Drop superfluous includes of qapi/qmp/qjson.h
Drop superfluous includes of qapi/qmp/dispatch.h
Include qapi/qmp/qnull.h exactly where needed
Include qapi/qmp/qnum.h exactly where needed
Include qapi/qmp/qbool.h exactly where needed
Include qapi/qmp/qstring.h exactly where needed
Include qapi/qmp/qdict.h exactly where needed
Include qapi/qmp/qlist.h exactly where needed
Include qapi/qmp/qobject.h exactly where needed
qdict qlist: Make most helper macros functions
Eliminate qapi/qmp/types.h
Typedef the subtypes of QObject in qemu/typedefs.h, too
Include qmp-commands.h exactly where needed
Drop superfluous includes of qapi/qmp/qerror.h
Include qapi/error.h exactly where needed
Drop superfluous includes of qapi-types.h and test-qapi-types.h
Clean up includes
Use #include "..." for our own headers, <...> for others
vnc: use stubs for CONFIG_VNC=n dummy functions
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
qemu-common.h includes qemu/option.h, but most places that include the
former don't actually need the latter. Drop the include, and add it
to the places that actually need it.
While there, drop superfluous includes of both headers, and
separate #include from file comment with a blank line.
This cleanup makes the number of objects depending on qemu/option.h
drop from 4545 (out of 4743) to 284 in my "build everything" tree.
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20180201111846.21846-20-armbru@redhat.com>
[Semantic conflict with commit bdd6a90a9e in block/nvme.c resolved]
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20180201111846.21846-6-armbru@redhat.com>
We should be pretty good in shape now. Floating interrupts are working
and atomic instructions should be atomic.
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20180129125623.21729-15-david@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Remove dependency of possible_cpus on 1st CPU instance,
which decouples configuration data from CPU instances that
are created using that data.
Also later it would be used for enabling early cpu to numa node
configuration at runtime qmp_query_hotpluggable_cpus() should
provide a list of available cpu slots at early stage,
before machine_init() is called and the 1st cpu is created,
so that mgmt might be able to call it and use output to set
numa mapping.
Use MachineClass::possible_cpu_arch_ids() callback to set
cpu type info, along with the rest of possible cpu properties,
to let machine define which cpu type* will be used.
* for SPAPR it will be a spapr core type and for ARM/s390x/x86
a respective descendant of CPUClass.
Move parse_numa_opts() in vl.c after cpu_model is parsed into
cpu_type so that possible_cpu_arch_ids() would know which
cpu_type to use during layout initialization.
Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Message-Id: <1515597770-268979-1-git-send-email-imammedo@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
KVM does not allow memory regions > KVM_MEM_MAX_NR_PAGES, basically
limiting the memory per slot to 8TB-4k. As memory slots on s390/kvm must
be a multiple of 1MB we need start a new memory region if we cross
8TB-1M.
With that (and optimistic overcommitment in the kernel) I was able to
start a 24TB guest on a 1TB system.
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Message-Id: <20171211122146.162430-1-borntraeger@de.ibm.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
[CH: 1UL -> 1ULL in KVM_MEM_MAX_NR_PAGES; build fix on 32 bit hosts]
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
We are good enough to boot upstream Linux kernels / Fedora 26/27. That
should be sufficient for now.
As the QEMU CPU model is migration safe, let's add compatibility code.
Generate the feature list to reduce the chance of messing things up in the
future.
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20171208165529.14124-1-david@redhat.com>
[CH: squashed 's390x/cpumodel: make qemu cpu model play with "none" machine'
(20171213132407.5227-1-david@redhat.com) and 's390x/tcg: don't include z13
features in the qemu model' (20171213171512.17601-1-david@redhat.com) into
patch]
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
With the cssids unrestricted (commit "s390x/css: unrestrict cssids") the
s390-squash-mcss machine property should not be used. Actually Libvirt
never supported this, so the expectation is that removing it should be
pretty painless. But let's play nice and deprecate it first.
Signed-off-by: Halil Pasic <pasic@linux.vnet.ibm.com>
Message-Id: <20171206144438.28908-3-pasic@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
The default css 0xfe is currently restricted to virtual subchannel
devices. The hope when the decision was made was, that non-virtual
subchannel devices will come around when guest can exploit multiple
channel subsystems. Since the guests generally don't do, the pain
of the partitioned (cssid) namespace outweighs the gain.
Let us remove the corresponding restrictions (virtual devices
can be put only in 0xfe and non-virtual devices in any css except
the 0xfe -- while s390-squash-mcss then remaps everything to cssid 0).
At the same time, change our schema for generating css bus ids to put
both virtual and non-virtual devices into the default css (spilling over
into other css images, if needed). The intention is to deprecate
s390-squash-mcss. With this change devices without a specified devno
won't end up hidden to guests not supporting multiple channel subsystems,
unless this can not be avoided (default css full).
Let us also advertise the changes to the management software (so it can
tell are cssids unrestricted or restricted).
The adverse effect of getting rid of the restriction on migration should
not be too severe. Vfio-ccw devices are not live-migratable yet, and for
virtual devices using the extra freedom would only make sense with the
aforementioned guest support in place.
The auto-generated bus ids are affected by both changes. We hope to not
encounter any auto-generated bus ids in production as Libvirt is always
explicit about the bus id. Since 8ed179c937 ("s390x/css: catch section
mismatch on load", 2017-05-18) the worst that can happen because the same
device ended up having a different bus id is a cleanly failed migration.
I find it hard to reason about the impact of changed auto-generated bus
ids on migration for command line users as I don't know which rules is
such an user supposed to follow.
Another pain-point is down- or upgrade of QEMU for command line users.
The old way and the new way of doing vfio-ccw are mutually incompatible.
Libvirt is only going to support the new way, so for libvirt users, the
possible problems at QEMU downgrade are the following. If a domain
contains virtual devices placed into a css different than 0xfe the domain
will refuse to start with a QEMU not having this patch. Putting devices
into a css different that 0xfe however won't make much sense in the near
future (guest support). Libvirt will refuse to do vfio-ccw with a QEMU
not having this patch. This is business as usual.
Signed-off-by: Halil Pasic <pasic@linux.vnet.ibm.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: Dong Jia Shi <bjsdjshi@linux.vnet.ibm.com>
Message-Id: <20171206144438.28908-2-pasic@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Peter Maydell
Cornelia Huck
David Hildenbrand
Collin Walling
Eduardo Habkost
Marc-André Lureau
Tony Krowiak
Janosch Frank
Christian Borntraeger
Igor Mammedov
Thomas Huth
Greg Kurz
Claudio Imbrenda
Viktor Mihajlovski
Markus Armbruster
Halil Pasic