On 5/27/24 08:29, Bernhard Beschow wrote:
I think the kernel's output indicates that the MMU is active:
[7e849b05] *pgd=2c552831, *pte=109eb34f, *ppte=109eb83f
AFAIU, the value in brackets is a virtual address while the pte's are physical
ones. Furthermore, the `info mtree` QMP command tells that the physical
addresses are RAM addresses:
0000000010000000-000000002fffffff (prio 0, ram): sabrelite.ram
So I think we can conclude this to be "normal memory" to speak in ARM terms.
Normal and Device are attributes on the page table entry.
See section G5.7 Memory region attributes in the Arm ARM.
But it's unlikely that the Linux kernel has messed this up, even back in 4.x
days.
If you want to make any progress, you'll have to share a test case.
r~
