Re: [PATCH] x86/cpufeatures: SGX: Adjust the error message when BIOS does not support SGX

[WangYuli]

On 2024/7/30 19:57, Huang, Kai wrote:

> +linux-sgx list, Jarkko, Haitao.
>
> This message is only printed when SGX is reported in CPUID but is not
> enabled in the FEAT_CTL MSR.  I can only recall this can happen when the
> BIOS actually provides an option for the user to turn on/off SGX, in
> which case the current message is correct.
>
> I could be wrong, but I don't recall I have met any machine that doesn't
> have any SGX option in the BIOS but still reports SGX in the CPUID.  Can
> you confirm this is the case?

Sure.

For example, Lenovo ThinkPad T480s that compliance id is TP00092A.

> I don't see this is mentioned in the github link below which reports this
> issue.  In fact, it says:
>
> 	非bug，主板bios关闭了SGX，正常内核提醒
>
> .. which is
>
> 	Not bug, the motherboard BIOS disabled SGX, normal kernel
> message
hah, that's a typo.
> And the link also shows this issue is "closed".
>
> Please clarify.
--
WangYuli