On Fri, Jun 19, 2020 at 7:02 PM Ananth, Rajesh <[email protected]> wrote:
>
> We used the Ubuntu 18.04 to get the "acpdump" outputs (This is the only
> complete package distribution we have. Otherwise, we use mainly the built
> Kernels). The NFIT data is all valid, but somehow it is printing the "@
> addresss" at the beginning as zeros.
>
> ============================= acpdump -n NFIT
> ========================================
>
> NFIT @ 0x0000000000000000 <<<< DON'T KNOW WHY.
That's fine, acpixtract was still able to convert it... I see this
from disassembling it:
acpixtract -s NFIT nfit.txt
iasl -d nft.dat
cat nfit.dsl
[000h 0000 4] Signature : "NFIT" [NVDIMM
Firmware Interface Table]
[004h 0004 4] Table Length : 000001A4
[008h 0008 1] Revision : 01
[009h 0009 1] Checksum : 83
[00Ah 0010 6] Oem ID : "ALASKA"
[010h 0016 8] Oem Table ID : "A M I "
[018h 0024 4] Oem Revision : 00000002
[01Ch 0028 4] Asl Compiler ID : "INTL"
[020h 0032 4] Asl Compiler Revision : 20091013
[024h 0036 4] Reserved : 00000000
[028h 0040 2] Subtable Type : 0000 [System Physical
Address Range]
[02Ah 0042 2] Length : 0038
[02Ch 0044 2] Range Index : 0001
[02Eh 0046 2] Flags (decoded below) : 0002
Add/Online Operation Only : 0
Proximity Domain Valid : 1
[030h 0048 4] Reserved : 00000000
[034h 0052 4] Proximity Domain : 00000000
[038h 0056 16] Region Type GUID :
66F0D379-B4F3-4074-AC43-0D3318B78CDB
[048h 0072 8] Address Range Base : 0000004080000000
[050h 0080 8] Address Range Length : 0000000400000000
[058h 0088 8] Memory Map Attribute : 0000000000008008
[..]
[0E0h 0224 2] Subtable Type : 0000 [System Physical
Address Range]
[0E2h 0226 2] Length : 0038
[0E4h 0228 2] Range Index : 0002
[0E6h 0230 2] Flags (decoded below) : 0002
Add/Online Operation Only : 0
Proximity Domain Valid : 1
[0E8h 0232 4] Reserved : 00000000
[0ECh 0236 4] Proximity Domain : 00000000
[0F0h 0240 16] Region Type GUID :
66F0D379-B4F3-4074-AC43-0D3318B78CDB
[100h 0256 8] Address Range Base : 0000004480000000
[108h 0264 8] Address Range Length : 0000000400000000
[110h 0272 8] Memory Map Attribute : 0000000000008008
...so Linux is being handed an NFIT with 2 regions. So the 4.16
interpretation looks correct to me. Are you sure you only changed
kernel versions and did not also do a BIOS update? If not the 4.7
result looks like a bug for this NFIT.
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