On Wed 2019-08-28 16:15:06, Thomas Gleixner wrote: > On Wed, 28 Aug 2019, Pavel Machek wrote: > > On Wed 2019-08-28 14:46:21, Borislav Petkov wrote: > > > On Wed, Aug 28, 2019 at 02:29:13PM +0200, Pavel Machek wrote: > > > > This is not a way to have an inteligent conversation. > > > > > > No, this *is* the way to keep the conversation sane, without veering > > > off into some absurd claims. > > > > > > So, to cut to the chase: you can simply add "rdrand=force" to your > > > cmdline parameters and get back to using RDRAND. > > > > > > And yet if you still feel this fix does not meet your expectations, > > > you were told already to either produce patches or who to contact. I'm > > > afraid complaining on this thread won't get you anywhere but that's your > > > call. > > > > No, this does not meet my expectations, it violates stable kernel > > rules, and will cause regression to some users, while better solution > > is known to be available. > > Your unqualified ranting does not meet my expectation either and it > violates any rule of common sense. > > For the record: > > Neither AMD nor we have any idea which particular machines have a fixed > BIOS and which have not. There is no technical indicator either at boot > time as the wreckage manifests itself only after resume. > > So in the interest of users the only sensible decision is to disable > RDRAND for this class of CPUs.
No.
Obviously best solution would be microcode update to fix the problem,
or to enable kernel to fix the problem.
> If you have a list of machines which have a fixed BIOS, then provide it
> in form of patches. If not then stop claiming that there is a better
> solution available.
And yes, whitelist would be already better than present solution. It is
not my duty to submit fixes to your proposed patch.
> Anyway, I'm done with that and further rants of yours go directly to
> /dev/null.
>
> Thanks for wasting everyones time
Thanks for your profesional attitude.
Pavel
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