Well, A20 has been done inside the caches since 486, usually in the TLB. Nehalem finally killed off A20M.
You're not the only one surprised by this... Linus Torvalds <torva...@linux-foundation.org> wrote: >On Wed, Dec 19, 2012 at 12:22 PM, H. Peter Anvin <h...@linux.intel.com> >wrote: >> x86, 8042: Enable A20 using KBC to fix S3 resume on some MSI >laptops > >Christ really? What century are we in? There are still machines that >have A20 disabled at all, much less externally? How do they even do >that these days, afaik the CPU caches can't handle the fake aliasing >anyway.. > >Anyway, pulled, I just wanted to express my surprise.. > > Linus -- Sent from my mobile phone. Please excuse brevity and lack of formatting. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
