Re: [PATCH v3 14/26] x86/virt/seamldr: Introduce skeleton for TDX Module updates

[Tony Lindgren]

On Fri, Jan 23, 2026 at 06:55:22AM -0800, Chao Gao wrote:
> The P-SEAMLDR requires that no TDX Module SEAMCALLs are invoked during a
> runtime TDX Module update.
> 
> But currently, TDX Module SEAMCALLs are invoked in various contexts and in
> parallel across CPUs. Additionally, considering the need to force all vCPUs
> out of guest mode, no single lock primitive, except for stop_machine(), can
> meet this requirement.
> 
> Perform TDX Module updates within stop_machine() as it achieves the
> P-SEAMLDR requirements and is an existing well understood mechanism.

Reviewed-by: Tony Lindgren <tony.lindgren@xxxxxxxxxxxxxxx>