incorrect setting of MT_DEVICE_ mem_types TEX bits on ARMv7?

[Henry Gomersall]

Looking at the configuration of the TEX bits for mem_types[MT_DEVICE]
and  mem_types[MT_DEVICE_NONSHARED] in mmu.c, they seem to be
inconsistent with the technical reference manual.

Relevant lines:
https://github.com/torvalds/linux/blob/master/arch/arm/mm/mmu.c#L498

The ARM architecture reference manual ARMv7-A and ARMv7-R, table B3-10
in section B3.8.2 describes the strongly-ordered TEX bits as 00 or 10
for shared and unshared respectively.

MT_DEVICE_WC is set as I'd expect (the buffering-on case).

It's more than possible I'm missing something, in which case I'd
appreciate knowing!

Cheers,

Henry

-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 833 bytes
Desc: OpenPGP digital signature
URL: <http://lists.infradead.org/pipermail/linux-arm-kernel/attachments/20201201/e5ade03c/attachment.sig>