Ganesh <ganes...@linux.ibm.com> writes: > On 7/24/20 12:09 PM, Ganesh Goudar wrote: > >> When an UE or memory error exception is encountered the MCE handler >> tries to find the pfn using addr_to_pfn() which takes effective >> address as an argument, later pfn is used to poison the page where >> memory error occurred, recent rework in this area made addr_to_pfn >> to run in real mode, which can be fatal as it may try to access >> memory outside RMO region. >> >> Have two helper functions to separate things to be done in real mode >> and virtual mode without changing any functionality. This also fixes >> the following error as the use of addr_to_pfn is now moved to virtual >> mode. >> >> Without this change following kernel crash is seen on hitting UE. ... >> > > We need this fix as well to fix pseries mce handling, Any comments on this > patch.
Looks OK. I'll pick it up. cheers
