Nice !

Balbir Singh [off-list ref] writes:

It would be nice to be able to dump page tables in a
particular context

Example use cases

Dumping PTE contents to see the keys (useful for debugging)

c0000000ba48c880 c0000000bab438b0   2677   2675 T  2 protection_keys

What is that ^ ?

0:mon> ds c0000000ba48c880 0x7ffff7f70000
translating tsk c0000000ba48c880, addr 7ffff7f70000
G: 0xb95b6400   U: 0xb6334000   M: 0xb6543000   PA: 0x012c0000, PTE: 0xd4800000012c0504

Without reading the code I don't grok what G/U/M mean.

Feel free to use more than one line of output :)

Dumping vmalloc space

0:mon> ds 0 d000000000000000

I suspect we will want to do that a lot. So I'd rather the arguments
were reversed, and the second (task) can be omitted.

So:
0:mon> ds x	== translate x via init_mm
0:mon> ds x y	== translate x via &y->mm

I guess it's easier for folks to find a task rather than an mm directly?
Otherwise it could take an mm not a task.

translating tsk           (null), addr d000000000000000

We should special case that to say "using kernel page tables" or similar.

G: 0x3d450400   U: 0xbc184000   M: 0x3d460000   PA: 0x7e010000, PTE: 0xc08000007e01018e

I did not replicate the complex code of dump_pagetable and have no support
for bolted linear mapping, thats why I've called it software pagetable
dumping support.

Not sure about that naming. On hash it makes sense, but not on radix or
on other platforms.

Maybe 'dv' for dump Virtual address ?

It doesn't dump a PTE, it tries to translate an address into a PTE.

cheers