How to identify CPU(s) on Linux EC2 instance?

I'm running a Linux c5d.9xlarge instance and wondering what CPU it's using. Amazon's Instance Types webpage states:

C5 and C5d 12xlarge, 24xlarge, and metal instances have the following specs:

• Custom 2nd generation Intel Xeon Scalable Processors (Cascade Lake) with a sustained all core Turbo frequency of 3.6GHz and single core turbo frequency of up to 3.9GHz.

All other C5 and C5d instances have the following specs:

• Custom 2nd generation Intel Xeon Scalable Processors (Cascade Lake) with a sustained all core Turbo frequency of 3.6GHz and single core turbo frequency of up to 3.9GHz or 1st generation Intel Xeon Platinum 8000 series (Skylake-SP) processor with a sustained all core Turbo frequency of up to 3.4GHz, and single core turbo frequency of up to 3.5 GHz.

So I'm curious whether I have a 1st generation Xeon Platinum 8000 series or a 2nd generation Xeon Scalable Processor. How can I check? uname -a just gives me:

$ uname -a
Linux ip-111-11-11-111.us-west-1.compute.internal 4.14.165-131.185.amzn2.x86_64 #1 SMP Wed Jan 15 14:19:56 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux

I'm using the amzn2-ami-hvm-2.0.20200207.1-x86_64-gp2 AMI.