Messages in this thread | | | Date | Sat, 18 Jan 2014 12:08:29 +0100 | From | Pavel Machek <> | Subject | Re: [PATCH] x86, CPU, AMD: Add workaround for family 16h, erratum 793 |
| |
On Sat 2014-01-18 11:42:31, Borislav Petkov wrote: > On Sat, Jan 18, 2014 at 03:01:55AM +0100, Pavel Machek wrote: > > I'd say that proposed "your bios has a bug" > > You can always unconditionally print "your bios has a bug". Just like > that. Without even looking.
Yeah, and we have linux-firmware testing toolkits, to discourage buggy bioses. In this case it is "your bios has rare and dangerous bug, see CVS-1234".
> If you want to add a warning yourself, you can put it in rc.local using > userspace goodies like msr-tools. With them you can toggle that bit ad > absurdum - no need for the kernel except msr.ko.
?? By the time userspace is booted, you have overwritten the MSR, and information, if the BIOS is buggy, was lost.
So linux-firmware testing toolkit actually has no chance to report this one.
Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
| |