On Mon, 2018-06-18 at 12:01 -0700, Dan Williams wrote: > On Mon, Apr 25, 2016 at 2:43 PM Toshi Kani <toshi.kani@xxxxxxx> wrote: > > > > ACPI 6.1, Table 5-133, updates NVDIMM Control Region Structure > > as follows. > > - Valid Fields, Manufacturing Location, and Manufacturing Date > > are added from reserved range. No change in the structure size. > > - IDs (SPD values) are stored as arrays of bytes (i.e. big-endian > > format). The spec clarifies that they need to be represented > > as arrays of bytes as well. > > > > Circling back on this a couple years too late... where are you reading > this "arrays of bytes" note. As far as I can see this is wrong. JEDEC > says that vendor id is stored LSB of the id is stored at the lowest > byte in SPD, which is little endian. So it seems Linux has showing the > incorrect value for a long time now. This follows ACPI 6.2a section 5.2.25.10 NVDIMM Representation Format, which Robert cited in his comment below: https://patchwork.kernel.org/patch/10237609/ Thanks, -Toshi ��.n��������+%������w��{.n�����{�����ܨ}���Ơz�j:+v�����w����ޙ��&�)ߡ�a����z�ޗ���ݢj��w�f
