Messages in this thread | | | Date | Tue, 11 Dec 2012 08:48:02 -0800 | From | "H. Peter Anvin" <> | Subject | Re: [tip:x86/microcode] x86/microcode_intel_early.c: Early update ucode on Intel's CPU |
| |
On 12/11/2012 08:46 AM, Yinghai Lu wrote: > On Tue, Dec 11, 2012 at 6:57 AM, Borislav Petkov <bp@alien8.de> wrote: >> On Mon, Dec 10, 2012 at 11:07:38PM -0800, Yinghai Lu wrote: >>> BTW, do we really need to update microcode so early? >> >> Yes we do. Normally ucode gets applied by the BIOS - this early approach >> is for those cases where OEMs don't release new BIOS anymore but we >> still need to apply a ucode patch as early as possible. > > but old bios with old ucode still work with some kind of previous kernel? > > Do we have case that system would not work with kernel if ucode is not > updated so early? >
It's not about "not working"... it is about "if the microcode isn't loaded early we have to disable features."
-hpa
| |