Commit Graph

4 Commits

Author SHA1 Message Date
Jiri Denemark
ab3d6ea0da cputest: Add support for MSR features to cpu-gather.sh
This patch adds an inline python code for reading MSR features. Since
reading MSRs is a privileged operation, we have to read them from
/dev/cpu/*/msr if it is readable (i.e., the script runs as root) or
fallback to using KVM ioctl which can be done by any user that can start
virtual machines.

The python code is inlined rather than provided in a separate script
because whenever there's an issue with proper detection of CPU features,
we ask the reporter to run cpu-gather.sh script to give us all data we
need to know about the host CPU. Asking them to run several scripts
would likely result in one of them being ignored or forgotten.

Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
2019-04-12 22:53:39 +02:00
Jiri Denemark
7bca16937a cputest: Test CPU usability blockers
Gather query-cpu-definitions results and use them for testing CPU model
usability blockers in CPUID to virCPUDef translation.

Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: John Ferlan <jferlan@redhat.com>
2017-10-16 09:23:20 +02:00
Jiri Denemark
d065934cd0 cputest: Switch host CPU data scripts to model expansion
Instantiating "host" CPU and querying it using qom-get has been the only
way of probing host CPU via QEMU until 2.9.0 implemented
query-cpu-model-expansion for x86_64. Even though libvirt never really
used the old way its result can be easily converted into the one
produced by query-cpu-model-expansion. Thus we can reuse the original
test data and possible get new data from hosts where QEMU does not
support the new QMP command.

Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
2017-03-03 19:57:57 +01:00
Jiri Denemark
3704b9003f tests: Add CPU detection tests
So far we only test CPUID -> CPU def conversion on artificial CPUID data
computed from another CPU def. This patch adds the infrastructure to
test this conversion on real data gathered from a host CPU and two
helper scripts for adding new test data:

- cpu-gather.sh runs cpuid tool and qemu-system-x86_64 to get CPUID data
  from the host CPU; this is what users can be asked to run if they run
  into an issue with host CPU detection in libvirt

- cpu-parse.sh takes the data generated by cpu-gather.sh and creates
  data files for CPU detection tests

The CPUID data queried from QEMU will eventually switch to the format
used by query-host-cpu QMP command once QEMU implements it. Until then
we just spawn QEMU with -cpu host and query the guest CPU in QOM. They
should both provide the same CPUID results, but query-host-cpu does not
require any guest CPU to be created by QEMU.

Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
2016-06-09 09:47:56 +02:00