Remote Detection of CPU Capabilities (CPUID) by any Web Server using JavaScript (JS)?

[Patrick]

Related, not to be confused withProtected Processor Identification Number (PPIN):

CPU serial numbers - Protected Processor Identification Number (PPIN)

Apparently Intel processors have had unique serial numbers embedded for a while now followed by this future planned effort by AMD. We need to investigate if this is accessible to guests testing KVM and other hypervisors with the mcelog tool which is documented as the "only mean"s to access this info. It would help if anyone volunteers with hist Intel machine to test. I’ve asked the libvirt/qemu devs for comment: https://www.redhat.com/archives/libvirt-users/2020-March/msg00062.html EDIT …