[PATCH v2] x86/perf : Add check for CPUID instruction before using

We still officially support the ancient i486 cpu. First generation versions of this processor do not have the CPUID instruction, though later versions do. Therefore you must check that the cpu supports it before using it. At present it fails with an "Illegal Instruction" signal on the early

[PATCH v2] x86/perf : Add check for CPUID instruction before using

We still officially support the ancient i486 cpu. First generation versions of this processor do not have the CPUID instruction, though later versions do. Therefore you must check that the cpu supports it before using it. At present it fails with an "Illegal Instruction" signal on the early