Re: [PATCH v4 0/2] x86/mce: Handle error injection failure in mce-inject module

Koralahalli Channabasappa, Smita
2022-03-11T20:57:02Z

Hi all,

Do you have any comments that needs to be addressed on these set of patches?

Thanks,
Smita.

On 2/14/22 5:36 PM, Smita Koralahalli wrote:

> This set of patches handles a scenario where error injection fails silently
> on mce-inject module and returns appropriate error code to userspace.
>
> Error injection fails if the platform enforces write ignored behavior on
> status registers and the first patch checks for writes ignored from
> MCA_STATUS register and returns appropriate error code to user.
>
> The second patch assigns and returns the error code to userspace when none
> of the CPUs are online.
>
> Smita Koralahalli (2):
> x86/mce: Check for writes ignored in MCA_STATUS register
> x86/mce/mce-inject: Return appropriate error code if CPUs are offline
>
> arch/x86/kernel/cpu/mce/core.c | 1 +
> arch/x86/kernel/cpu/mce/inject.c | 42 +++++++++++++++++++++++++++++---
> 2 files changed, 39 insertions(+), 4 deletions(-)
>