[v5] powerpc/xmon: Support dumping software pagetables

[Michael Ellerman]

On Mon, 2017-10-30 at 11:01:12 UTC, Balbir Singh wrote:
> It would be nice to be able to dump page tables in a particular
> context.
> 
> eg: dumping vmalloc space:
> 
>   0:mon> dv 0xd00037fffff00000
>   pgd  @ 0xc0000000017c0000
>   pgdp @ 0xc0000000017c00d8 = 0x00000000f10b1000
>   pudp @ 0xc0000000f10b13f8 = 0x00000000f10d0000
>   pmdp @ 0xc0000000f10d1ff8 = 0x00000000f1102000
>   ptep @ 0xc0000000f1102780 = 0xc0000000f1ba018e
>   Maps physical address = 0x00000000f1ba0000
>   Flags = Accessed Dirty Read Write
> 
> This patch does not replicate the complex code of dump_pagetable and
> has no support for bolted linear mapping, thats why I've it's called
> dump virtual page table support. The format of the PTE can be expanded
> even further to add more useful information about the flags in the PTE
> if required.
> 
> Signed-off-by: Balbir Singh <bsingharora at gmail.com>
> [mpe: Bike shed the output format, show the pgdir]
> Signed-off-by: Michael Ellerman <mpe at ellerman.id.au>

Applied to powerpc next, thanks.

https://git.kernel.org/powerpc/c/80eff6c484799722736471d15ff9cc

cheers