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Intel Confirms "On Demand" Upgrades With Sapphire Rapids (Software Defined Silicon)

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  • #21
    Originally posted by ryao View Post
    They could go with fuses that permanently activate the functionality once they are blown. All your concerns would be handled by that.

    I have not checked the public details, but are you sure that they used flash?
    Based on what I recall from the kernel support patches, it involved various aspects of key management that sounded like it could involve dynamically adding & removing keys.

    Even if it's PROM-based today, it could be flash-based tomorrow. I would need more assurances that keys can never be revoked, corrupted, or disabled by further keys, I very much doubt they will give such assurances.

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