Search notes:

/proc/cpuinfo

For each CPU in the system, /proc/cpuinfo contains the following information:

	Example values
`processor`
`vendor_id`	`GenuineIntel`
`cpu family`
`model`
`model name`
`stepping`
`microcode`
`cpu MHz`
`cache size`
`physical id`		Physical package id of the logical CPU
`siblings`		Total number of logical processors (both threads and cores) in the physical package currently in use by the OS
`core id`		Core id of the logical CPU
`cpu cores`		Total number of cores in the physical package currently in use by the OS. Oracle: See also the value of `NUM_CPU_CORES` in `v$osstat`.
`apicid`
`initial apicid`
`fpu`
`fpu_exception`
`cpuid level`
`wp`
`flags`	`fpu`, `vme`, `de` etc.	`flags` exposes a CPU's feature bits as humanly readable strings
`vmx flags`	`vnmi`, `invvpid`, `ept_x_only` etc.
`bugs`	`cpu_meltdown`, `spectre_v1`, `spectre_v2`, `spec_store_bypass`, `l1tf`, `mds`, `swapgs`, `taa`, `itlb_multihit`, `srbds`, `mmio_stale_data`, `retbleed` etc
`bogomips`
`clflush size`
`cache_alignment`
`address sizes`
`power management`

flags

See also

the cpuid2cpuflags utility
The comments in arch/x86/include/asm/cpufeatures.h give a clue what a capability bit enables.
arch/x86/kernel/cpu/capflags.c
arch/x86/boot/cpustr.h

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