Re: [PATCH v1 2/3] x86/coco: Disable TDX module calls when TD partitioning is active

Kirill A. Shutemov
2023-11-23T14:13:30Z

On Wed, Nov 22, 2023 at 06:01:05PM +0100, Jeremi Piotrowski wrote:
> Introduce CC_ATTR_TDX_MODULE_CALLS to allow code to check whether TDX module
> calls are available. When TD partitioning is enabled, a L1 TD VMM handles most
> TDX facilities and the kernel running as an L2 TD VM does not have access to
> TDX module calls. The kernel still has access to TDVMCALL(0) which is forwarded
> to the VMM for processing, which is the L1 TD VM in this case.

Sounds like a problem introduced by patch 1/3 :/

--
Kiryl Shutsemau / Kirill A. Shutemov