Re: [RESEND RFC PATCH] x86/bugs: Add "unknown" reporting for MMIO Stale Data

[Pawan Gupta]

On Thu, Jul 14, 2022 at 06:30:19PM -0700, Pawan Gupta wrote:
> Older CPUs beyond its Servicing period are not listed in the affected
> processor list for MMIO Stale Data vulnerabilities. These CPUs currently
> report "Not affected" in sysfs, which may not be correct.
> 
> Add support for "Unknown" reporting for such CPUs. Mitigation is not
> deployed when the status is "Unknown".
> 
> "CPU is beyond its Servicing period" means these CPUs are beyond their
> Servicing [1] period and have reached End of Servicing Updates (ESU) [2].
> 
>   [1] Servicing: The process of providing functional and security
>   updates to Intel processors or platforms, utilizing the Intel Platform
>   Update (IPU) process or other similar mechanisms.
> 
>   [2] End of Servicing Updates (ESU): ESU is the date at which Intel
>   will no longer provide Servicing, such as through IPU or other similar
>   update processes. ESU dates will typically be aligned to end of
>   quarter.
> 
> Suggested-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>

Ping! Is there any interest in fixing reporting for older processors?