Re: [PATCH v3] s390x: Add 3f program exception handler

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On Tue, Sep 08, 2020 at 09:05:04AM -0400, Janosch Frank wrote:
> Program exception 3f (secure storage violation) can only be detected
> when the CPU is running in SIE with a format 4 state description,
> e.g. running a protected guest. Because of this and because user
> space partly controls the guest memory mapping and can trigger this
> exception, we want to send a SIGSEGV to the process running the guest
> and not panic the kernel.
> 
> Signed-off-by: Janosch Frank <frankja@xxxxxxxxxxxxx>
> CC: <stable@xxxxxxxxxxxxxxx> # 5.7+
> Fixes: 084ea4d611a3 ("s390/mm: add (non)secure page access exceptions handlers")
> Reviewed-by: Claudio Imbrenda <imbrenda@xxxxxxxxxxxxx>
> Reviewed-by: Cornelia Huck <cohuck@xxxxxxxxxx>
> Acked-by: Christian Borntraeger <borntraeger@xxxxxxxxxx>
> ---
>  arch/s390/kernel/entry.h     |  1 +
>  arch/s390/kernel/pgm_check.S |  2 +-
>  arch/s390/mm/fault.c         | 20 ++++++++++++++++++++
>  3 files changed, 22 insertions(+), 1 deletion(-)

I guess this should go upstream via the s390 tree?
Should I pick this up?



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