On 1/7/22 10:02, Vitaly Kuznetsov wrote:
I'm again leaning towards an allowlist and currently I see only two candidates: CPUID.01H.EBX bits 31:24 (initial LAPIC id) CPUID.0BH.EDX (x2APIC id) Anything else I'm missing?
I would also ignore completely CPUID leaves 03H, 04H, 0BH, 80000005h, 80000006h, 8000001Dh, 8000001Eh (cache and processor topology), just to err on the safe side.
We could change kvm_find_cpuid_entry to WARN if any of those leaves are passed.
Paolo
