On Tue, Oct 01, 2024, Manali Shukla wrote:
Add support for generating Virtualization feature names in capflags.c and use the resulting x86_virt_flags to print the virt flags in /proc/cpuinfo.
Currently, it is difficult to check if a feature is supported in _KVM_. Manually querying cpuid to know whether the feature is supported or not can be quite tedious at times.
Print the features supported in KVM hypervisor in a dedicated "virt" line instead of adding them to the common "flags".
First off, printing flags in a separate section doesn't magically connect them to KVM support. E.g. if you cut this series after patch 2, BUS_LOCK_THRESHOLD will show up in "virt" despite KVM not supporting the feature.
Second, deviating from the X86_FEATURE_* syntax will make it _harder_ for KVM to manage its configuration.
Third, this is completely orthogonal to supporting bus lock threshold in KVM, i.e. belongs in a separate series.