Supported Features by Rockchip RK3399

#1

I am a bit confused about the features reported by cat /proc/cpuinfo on the Ubuntu Server distro. It returns

Features        : fp asimd evtstrm aes pmull sha1 sha2 crc32

while in this [1,2] blog the RK3399 gives

Features    : half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt lpae evtstrm aes pmull sha1 sha2 crc32

However, you guys wrote that the Rockchip ARMv8-A does not support vfpv3 [3].
But investigating some webpages, ARMv8 is backwards compatible [4] and the Rockchip RK3399 should support vfpv4 in particular [5] (which should be compatible to vfpv3 [6]).
Could you enlight me reagrding the RK3399 features, and why there is a discrepance of my /proc/cpuinfo output?
Also, does the RK3399 supports SVE [7] as stated here [8] since it is ARMv8-A?

Since I am a new user I am not allowed to post more than two links.
Here is the link list: https://pastebin.com/1JYuewHT

#2

Ok, we installed you Debian distribution and this tells us the following when we query cat /proc/cpuinfo:

Features    : half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt lpae evtstrm aes pmull sha1 sha2 crc32

So might there be an issue with your Ubuntu distro?

#3

I think this might be the cause of the kernel packaging in deb. We have changed the kernel arch to all instead of arm64 for installing the kernel package on 32bit os. The kernel does not detect the armv8 so the armv8 feature is not shown. This does not affect the actually execution/compiling I think. We will fix this issue by fully transform to arm64 images. You can try Armbian image, there should be no such issue.

https://github.com/radxa/kernel/commit/aad28c8f89aff16bb9a3218a94cf964c15d8e123

#4

Ok, but this means that the Rockchip rk3399, and therefore aarch64 supports the following features

Features    : half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt lpae evtstrm aes pmull sha1 sha2 crc32

right?