Messages in this thread | | | Date | Wed, 15 Nov 2017 12:54:12 +0100 | From | Peter Zijlstra <> | Subject | Re: [PATCH v5 11/11] intel_sgx: driver documentation |
| |
On Tue, Nov 14, 2017 at 10:49:48PM +0200, Jarkko Sakkinen wrote: > In these cases IA32_FEATURE_CONTROL[17] would be zeroed before locking > the feature control, which would mean that the kernel could not write > new values with wrmsr for the root key hash.
> The question is whether we want to allow this or not. If the answer is > no, a check can be added to the driver initialization code whether 17 is > set, and if not, it driver would fail to initialize.
That has my vote; I would not trust a firmware/BIOS key.
| |