[Skiboot-stable] [PATCH] xive/p9: Remove assert from xive_eq_for_target()

[Vasant Hegde]

On 11/27/20 1:02 PM, Cédric Le Goater wrote:
> XIVE VPs are structures describing the vCPUs of guests. When starting
> a guest, these are allocated and enabled and some checks are done on
> the location of the associated ENDs, which describe the event
> queues. If the block of the VP and the block of the ENDs do not match,
> the XIVE driver asserts.
> 
> Unfortunately, there is no way to check that a VP identifier is part
> of a VP block that was previously allocated and it is relatively easy
> to crash the host with a bogus VP id. That can be done with a QEMU
> hack on a machine using vsmt.
> 
> Simply remove the assert, the OS should gracefully handle the error.

Thanks! Merged to master as of f07ea956.

Cedric,

I see that you have marked this to stable tree. Do we need this in all supported 
stable branches or only in latest stable i.e. v6.7.x?

-Vasant