Re: [PATCH] x86, CPU, AMD: Add workaround for family 16h, erratum 793

From: Borislav Petkov
Date: Fri Jan 17 2014 - 05:19:12 EST

On Thu, Jan 16, 2014 at 10:21:24PM -0200, Henrique de Moraes Holschuh wrote:
> On Thu, 16 Jan 2014, Aravind Gopalakrishnan wrote:
> > We might want to still have a software fix for this just in case
> > someone uses older BIOSes..
> There is no "just in case" when it comes to someone using outdated firmware.
> It is a *given*, except for hardware that is only used in HPC and multiple
> (> 2) socket servers/workstations (which might be the case here, I don't
> know what processors we're talking about).
> The vast majority of PC users will never update their firmware, unless the
> update is automatically offered to them, and sometimes not even in that
> case.

We also cannot carry *every* erratum workaround in the kernel just
because people don't update firmware. Firmware is becoming ubiquitous,
sadly, and because of that, admins should provision for firmware
upgrades too.

Besides, *even* if we put *all* errata fixes in the kernel, you'd need
to update it anyway and reboot. In this case, you can just as well
update your firmware instead, which involves that same reboot.


Sent from a fat crate under my desk. Formatting is fine.
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