Re: [PATCH 0/2] riscv: Increase mmap_rnd_bits_max on Sv48/57

[Sami Tolvanen]

Hi Palmer,

On Wed, Dec 6, 2023 at 5:14 AM Palmer Dabbelt <palmer@xxxxxxxxxxx> wrote:
>
> On Fri, 29 Sep 2023 14:11:56 PDT (-0700), samitolvanen@xxxxxxxxxx wrote:
> > Hi all,
> >
> > We noticed that 64-bit RISC-V kernels limit mmap_rnd_bits to 24
> > even if the hardware supports a larger virtual address space size
> > [1]. These two patches allow mmap_rnd_bits_max to be changed during
> > init, and bumps up the maximum randomness if we end up setting up
> > 4/5-level paging at boot.
>
> Sorry for missing this, I'm just poking through old stuff in patchwork.
> As far as I can tell this is still relevant, the discussions are just on
> the mmap() bits (but we'd already screwed that one up and have since
> fixed it).
>
> So
>
> Reviewed-by: Palmer Dabbelt <palmer@xxxxxxxxxxxx>
> Acked-by: Palmer Dabbelt <palmer@xxxxxxxxxxxx>
>
> in case someone else wants to take it, but I'm OK taking that MM patch
> with Kees' review.

Is this still on your radar for v6.8 or would you prefer me to resend
the patches?

Sami