Re: [Part2 PATCH v4 05/29] crypto: ccp: Add Platform Security Processor (PSP) device support
From: Brijesh Singh
Date: Sun Oct 01 2017 - 16:05:38 EST
On 9/30/17 11:11 AM, Borislav Petkov wrote:
> I think just from having CRYPTO_DEV_CCP_DD depend on CPU_SUP_AMD ||
> ARM64, CRYPTO_DEV_SP_PSP gets almost the same dependency transitively.
> But sure, let's make the PSP build only on x86. It should depend on
> X86_64, to be precise.
I think theoretically a 32-bit host OS can invoke a PSP commands but
currently PSP interface is exposing only the SEV FW command. And SEV
feature is available when we are in 64-bit mode hence for now its okay
to have depends on X86_64. I will add CRYPTO_DEV_CCP_DD depend on
CPU_SUP_AMD || ARM64 and CRYPTO_DEV_SP_PSP depend on X86_64 and send you