In commit v5.9.0-400-gaf8e39921a I removed printing model's fallback and
vendor_id attributes when no model is specified. However, vendor_id
makes sense even without a specific CPU model (for host-model CPUs).
https://bugzilla.redhat.com/show_bug.cgi?id=1804549
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Recently CPU hardware vendors have started to support a new structure
inside the CPU package topology known as a "die". Thus the hierarchy
is now:
sockets > dies > cores > threads
This adds support for "dies" in the XML parser, with the value
defaulting to 1 if not specified for backwards compatibility.
For example a system with 64 logical CPUs might report
<topology sockets="4" dies="2" cores="4" threads="2"/>
Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Annoyingly there was no existing constructor, and identifying all the
places which do a VIR_ALLOC(cpu) is a bit error prone. Hopefully this
has found & converted them all.
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Most likely for historical reasons our CPU def formatting code is
happily adding useless <model fallback='allow'/> for host-model CPUs. We
can just drop it.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Commit v0.8.4-66-g95ff6b18ec (9 years ago) changed the default value for
the cpu/@match attribute to 'exact' in a rather complicated way. It did
so only if <model> subelement was present and set -1 otherwise (which is
not expected to ever happen). Thus the following two equivalent XML
elements:
<cpu mode='host-model'/>
and
<cpu mode='host-model'>
<model/>
</cpu>
would be parsed differently. The former would end up with match == -1
while the latter would have match == 1 ('exact'). This is not a big deal
since the match attribute is ignored for host-model CPUs, but we can
simplify the code and make it a little bit saner anyway.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Use the new helper to initialize child XML element buffers.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
The function now does not return an error so we can drop it fully.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Replace all occurrences of
if (VIR_STRDUP(a, b) < 0)
/* effectively dead code */
with:
a = g_strdup(b);
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Implement an XML to virCPUDefPtr helper that handles the ctxt
prerequisite for virCPUDefParseXML.
This does not alter any functionality.
Signed-off-by: Collin Walling <walling@linux.ibm.com>
Reviewed-by: Bjoern Walk <bwalk@linux.ibm.com>
Reviewed-by: Daniel Henrique Barboza <danielh413@gmail.com>
Message-Id: <1568924706-2311-14-git-send-email-walling@linux.ibm.com>
Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
This API can be used to check whether a CPU definition contains features
matching a given filter.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
This new internal API can be used for in place filtering of CPU features
in virCPUDef.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Due to this bug the following command would fail on any host where TSC
frequency can be probed:
$ virsh capabilities | virsh cpu-baseline /dev/stdin
error: unsupported configuration: Invalid TSC frequency
https://bugzilla.redhat.com/show_bug.cgi?id=1641702
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
This patch adds a new
<counter name='tsc' frequency='N' scaling='on|off'/>
element into the host CPU capabilities XML.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Different check values are not ABI compatible. For example
if on migration we change 'full' to 'partial' then guest cpu
on destination can be different.
Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
Signed-off-by: Nikolay Shirokovskiy <nshirokovskiy@virtuozzo.com>
Standardize on putting the _LAST enum value on the second line
of VIR_ENUM_IMPL invocations. Later patches that add string labels
to VIR_ENUM_IMPL will push most of these to the second line anyways,
so this saves some noise.
Signed-off-by: Cole Robinson <crobinso@redhat.com>
Missing semicolon at the end of macros can confuse some analyzers
(like cppcheck <filename>), and we have a mix of semicolon and
non-semicolon usage through the code. Let's standardize on using
a semicolon for VIR_ENUM_IMPL calls.
Move the verify() statement to the end of the macro and drop
the semicolon, so the compiler will require callers to add a
semicolon.
While we are touching these call sites, standardize on putting
the closing parenth on its own line, as discussed here:
https://www.redhat.com/archives/libvir-list/2019-January/msg00750.html
Reviewed-by: John Ferlan <jferlan@redhat.com>
Signed-off-by: Cole Robinson <crobinso@redhat.com>
In many files there are header comments that contain an Author:
statement, supposedly reflecting who originally wrote the code.
In a large collaborative project like libvirt, any non-trivial
file will have been modified by a large number of different
contributors. IOW, the Author: comments are quickly out of date,
omitting people who have made significant contribitions.
In some places Author: lines have been added despite the person
merely being responsible for creating the file by moving existing
code out of another file. IOW, the Author: lines give an incorrect
record of authorship.
With this all in mind, the comments are useless as a means to identify
who to talk to about code in a particular file. Contributors will always
be better off using 'git log' and 'git blame' if they need to find the
author of a particular bit of code.
This commit thus deletes all Author: comments from the source and adds
a rule to prevent them reappearing.
The Copyright headers are similarly misleading and inaccurate, however,
we cannot delete these as they have legal meaning, despite being largely
inaccurate. In addition only the copyright holder is permitted to change
their respective copyright statement.
Reviewed-by: Erik Skultety <eskultet@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
A microcode update can cause the CPUID bits to change; an example
from the past was the update that disabled TSX on several Haswell and
Broadwell machines.
In order to track the x86 microcode version in the QEMU capabilities,
we have to fetch it and store it in the host CPU. This also makes the
version visible in "virsh capabilities", which is a nice side effect.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Right-aligning backslashes when defining macros or using complex
commands in Makefiles looks cute, but as soon as any changes is
required to the code you end up with either distractingly broken
alignment or unnecessarily big diffs where most of the changes
are just pushing all backslashes a few characters to one side.
Generated using
$ git grep -El '[[:blank:]][[:blank:]]\\$' | \
grep -E '*\.([chx]|am|mk)$$' | \
while read f; do \
sed -Ei 's/[[:blank:]]*[[:blank:]]\\$/ \\/g' "$f"; \
done
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Rename virDomainNumaDefCPUFormat to virDomainNumaDefCPUFormatXML,
matching its peer virDomainNumaDefCPUParseXML and the general
vir*{Format,Parse}XML conventions.
Signed-off-by: Wim ten Have <wim.ten.have@oracle.com>
Reviewed-by: Jim Fehlig <jfehlig@suse.com>
In the past we updated host-model CPUs with host CPU data by adding a
model and features, but keeping the host-model mode. And since the CPU
model is not normally formatted for host-model CPU defs, we had to pass
the updateCPU flag to the formatting code to be able to properly output
updated host-model CPUs. Libvirt doesn't do this anymore, host-model
CPUs are turned into custom mode CPUs once updated with host CPU data
and thus there's no reason for keeping the hacks inside CPU XML
formatters.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
After an OOM error, virBuffer* APIs set buf->use to zero.
Adding a buffer to the parent buffer only if use is non-zero
would quietly drop data on error.
Check the error beforehand to make sure buf->use is zero
because we have not attempted to add anything to it.
The function will be used in paths where mismatching CPU defs are not an
error.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
This patch introduces
<cache level='N' mode='emulate'/>
<cache mode='passthrough'/>
<cache mode='disable'/>
sub element of /domain/cpu. Currently only a single <cache> element is
allowed.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
The type of this parameter is virCPUType so calling it 'mode' is pretty
strange, 'type' is a much better name.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
The attribute can be used to request a specific way of checking whether
the virtual CPU matches created by the hypervisor matches the
specification in domain XML.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Old GCC on CentOS 6 thinks vendor and vendor_id might be used
uninitialized in virCPUDefStealModel. The compiler is wrong, though.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Guest CPU definitions with mode='custom' and missing <vendor> are
expected to run on a host CPU from any vendor as long as the required
CPU model can be used as a guest CPU on the host. But even though no CPU
vendor was explicitly requested we would sometimes force it due to a bug
in virCPUUpdate and virCPUTranslate.
The bug would effectively forbid cross vendor migrations even if they
were previously working just fine.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
The function filters all CPU features through a given callback while
copying CPU model related parts of a CPU definition.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
The function moves CPU model related parts from one CPU definition to
another. It can be used to avoid unnecessary copies from a temporary CPU
definitions which will be freed anyway.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Useful for copying a CPU definition without model related parts (i.e.,
without model name, feature list, vendor).
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
There is a lot of places, were it's pretty easy for user to enter some
characters that we need to escape to create a valid XML description.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1197580
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
