Re: [PATCH 4/6] efi: Get the secure boot status [ver #2]

From: David Howells
Date: Wed Nov 23 2016 - 09:13:38 EST

Mark Rutland <mark.rutland@xxxxxxx> wrote:

> > > if (secure_boot < 0)
> > > pr_efi_err(sys_table,
> > > "could not determine UEFI Secure Boot status.\n");
> >
> > In which case, should this be moved into efi_get_secureboot() and it return a
> > bool?
> That would make sense to me, provided we're only likely to call that
> once (and only log once).
> I guess it would also make sense to change the latter case to soemthing
> like:
> Could not determine UEFI Secure Boot status. Assuming enabled.
> ... so as to make it clear what the effect is.

Actually, the two arches have a different interpretation on how to deal with
an error. Matthew Garrett's original x86 patch assumes that if we get an
error when trying to read SecureBoot and SetupMode that we're *not* in secure
mode, but ARM assumes the opposite.