Messages in this thread | | | Date | Sat, 15 Dec 2012 15:17:05 -0800 | From | "H. Peter Anvin" <> | Subject | Re: [tip:x86/microcode] x86/microcode_intel_early.c: Early update ucode on Intel's CPU |
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On 12/15/2012 03:15 PM, Yinghai Lu wrote: >> >> That is for the kernel region itself (that code is actually unchanged from >> the current code), and yes, we could cap that one to _end if there are >> systems which have bugs in that area. The dynamic page tables map 1G >> aligned at a time. > > dynamic should be 2M too. > > AMD system: > > http://git.kernel.org/?p=linux/kernel/git/tip/tip.git;a=commitdiff;h=66520ebc2df3fe52eb4792f8101fac573b766baf > > BIOS-e820: [mem 0x0000000100000000-0x000000e037ffffff] usable > BIOS-e820: [mem 0x000000e038000000-0x000000fcffffffff] reserved > BIOS-e820: [mem 0x0000010000000000-0x0000011ffeffffff] usable > > the hole is not 1G aligned. > > or HT region is from e040000000 ? >
The HT region starts at 0xfd00000000 -- after that reserved region, so I have no idea what that particular system is trying to do or what is requirements are (nor what its MTRR setup is, since you didn't post it.)
-hpa
-- H. Peter Anvin, Intel Open Source Technology Center I work for Intel. I don't speak on their behalf.
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