Re: [PATCH v2 08/18] arm64: don't disable ADR_PREL_PG_HI21* with ARM64_ERRATUM_843419

Ard Biesheuvel
2017-11-16T16:34:05Z

On 16 November 2017 at 16:32, Sami Tolvanen <samitolvanen@google.com> wrote:
> On Thu, Nov 16, 2017 at 11:44:06AM +0000, Will Deacon wrote:
>> Right, and this would also mean that we silently load vulnerable
>> modules that are linked with either LD that doesn't support
>> --fix-cortex-a53-843419 or simply wasn't passed.
>
> You'll see a warning at least if the linker doesn't support the flag,
> but yes, you're correct. In v1 of this patch set, LTO depended on this
> erratum not being selected, but I changed it in v2 based on Ard's
> suggestion.
>
> I'm fine with not being able to use LTO on devices that are affected
> by this erratum, so either option works for me. I can even change
> this so the user must explicitly disable the erratum in order to use
> LTO. Thoughts?
>

You still have not explained to us how GOLD avoids the erratum.