Re: [PATCH v7 06/20] x86/virt/tdx: Shut down TDX module in case of error

[Thomas Gleixner]

On Tue, Nov 22 2022 at 10:20, Peter Zijlstra wrote:

> On Mon, Nov 21, 2022 at 01:26:28PM +1300, Kai Huang wrote:
>
>> Shutting down the TDX module requires calling TDH.SYS.LP.SHUTDOWN on all
>> BIOS-enabled CPUs, and the SEMACALL can run concurrently on different
>> CPUs.  Implement a mechanism to run SEAMCALL concurrently on all online
>> CPUs and use it to shut down the module.  Later logical-cpu scope module
>> initialization will use it too.
>
> Uhh, those requirements ^ are not met by this:

  Can run concurrently != Must run concurrently
 
The documentation clearly says "can run concurrently" as quoted above.

Thanks,

        tglx