Hi Vinod, On 20 June 2018 at 11:02, Vinod <vkoul@xxxxxxxxxx> wrote: > On 19-06-18, 22:28, Herbert Xu wrote: >> On Mon, Jun 18, 2018 at 07:42:59PM +0530, Vinod Koul wrote: >> > Qcom 8996 and later chips support prng v2 where we need to only >> > implement .read callback for hwrng. >> > >> > Add a new table for v2 which supports this and get version required for >> > driver data. >> > >> > Signed-off-by: Vinod Koul <vkoul@xxxxxxxxxx> >> >> Is this really a pseudo-RNG? If so it needs to be moved over to >> the algif_rng interface. >> >> hwrng is for true hardware RNGs only, because it may be directly >> fed into /dev/random. > > I am trying to find how how much random output this hardware generates. > > Meanwhile, can you please point out examples/Documentation for algif_rng > and if any test tools for this? As Herbert suggested exynos rng is a good example. It was wrongly using hwrng framework then switched to using crypto framework. I have a patch for msm rng using crypto framework, only compile tested though. You can find the patch at https://pastebin.ubuntu.com/p/44r6BJgBkN/. I am having a hard time sending patches via git send-email form a gmail account so I have put it in pastebin. Feel free to use it if that is useful. Regards, PrasannaKumar
