Intel make kitty scared... What a fuckmess. On Tue, Mar 13, 2018 at 22:57 Brian Camp <br...@thecamps.org> wrote:
> On Tue, Mar 13, 2018 at 10:39 PM, Theo de Raadt <dera...@openbsd.org> > wrote: > >> According to some sources, Intel and a handful of others have known > about the > >> issue since February 2017(!), so perhaps it has already been patched in > the > >> 08Jan2018 BIOS. I too have doubts that to date any processor has been > >> redesigned to avoid the flaws entirely, but then again... > > > > Sure. A BIOS can change the flag bits. > > > > Be nice to know. Did a BIOS change them? > > I downgraded the bios to try and figure this out. Going back just one > revision (1/8/2018 to 12/18/2017) causes it to lose the flag and > -current's MELTDOWN workaround to activate. > > Previous BIOS revision (12/18/2017): > bcamp@nuc6cayh:~ (OpenBSD 6.3) > $ cpuid 0x7 > eax = 0x00000000 0 "????" > ebx = 0x2294e283 580182659 "???"" > ecx = 0x00000000 0 "????" > edx = 0x00000000 0 "????" > > Newest BIOS revision (1/8/2018): > bcamp@nuc6cayh:~ (OpenBSD 6.3) > $ cpuid 0x7 > eax = 0x00000000 0 "????" > ebx = 0x2294e283 580182659 "???"" > ecx = 0x00000000 0 "????" > edx = 0x2c000000 738197504 "???," > >
