Re: [libvirt] [PATCH v2 10/10] cpu_x86: Use signature in CPU detection code

Our current detection code uses just the number of CPU features which need to be added/removed from the CPU model to fully describe the CPUID data. The smallest number wins. But this may sometimes generate wrong results as one can see from the fixed test cases. This patch modifies the algorithm to prefer the CPU model with matching signature even if this model results in a longer list of additional features. Signed-off-by: Jiri Denemark <jdenemar(a)redhat.com&gt; --- src/cpu/cpu_map.xml | 16 +++ src/cpu/cpu_x86.c | 148 +++++++++++++++++++-- .../cputestdata/x86-cpuid-Core-i7-5600U-guest.xml | 11 +- tests/cputestdata/x86-cpuid-Core2-E6850-guest.xml | 5 +- tests/cputestdata/x86-cpuid-Core2-E6850-host.xml | 5 +- tests/cputestdata/x86-cpuid-Xeon-5110-guest.xml | 5 +- tests/cputestdata/x86-cpuid-Xeon-5110-host.xml | 5 +- tests/cputestdata/x86-host+penryn-force-result.xml | 4 +- 8 files changed, 176 insertions(+), 23 deletions(-)