Does Cobalt 100 support Arm CCA

Itaru Kitayama 0

I am thinking about using a Cobalt 100 based instance on Azure, and now I am wondering whether Arm CCA is supported on those CPUs

Sai Krishna Katakam 1,700 Reputation points Microsoft Vendor

2025-01-15T06:35:23.2233333+00:00

Hi Itaru Kitayama,

Welcome to the Microsoft Q&A Platform! Thank you for asking your question here.

The Azure Cobalt 100 Virtual Machines are powered by Microsoft's custom-designed 64-bit Arm-based Cobalt 100 CPU, which is based on the Arm Neoverse Compute Subsystem (CSS) N2 architecture. However, there is no specific information confirming whether it supports Arm Confidential Compute Architecture (CCA).

For more information, please refer to below links:
Arm CCA will Put Confidential Compute in the Hands of Every Developer
Azure Cobalt 100 Blog Post

If you have any further queries, do let us know. If the comment is helpful, please click "Upvote".
Itaru Kitayama 0 Reputation points

2025-01-15T06:45:18.0833333+00:00

Thanks for the comments. Can someone from Microsoft confirm whether it sports Arm CCA or not?
Sai Krishna Katakam 1,700 Reputation points Microsoft Vendor

2025-01-21T06:45:24.59+00:00

Hi Itaru Kitayama,

I'm checking with internal team and will get back you soon.

Thank you.
Itaru Kitayama 0 Reputation points

2025-01-21T08:36:08.02+00:00

I look forward to the answer
Prrudram-MSFT 27,596 Reputation points

2025-01-24T16:53:13.17+00:00

Hi @Itaru Kitayama

No, Cobalt 100 doesn't support Arm Confidential Compute Architecture. Can you share what is use case here and what are the specific reasons you are looking for CC on ARM64?

Your answer