On Fri, 2016-05-08 at 12:04:13 UTC, Mahesh Salgaonkar wrote: > From: Mahesh Salgaonkar <mah...@linux.vnet.ibm.com> > > The current implementation of MCE early handling modifies CR0/1 registers > without saving its old values. Fix this by moving early check for > powersaving mode to machine_check_handle_early(). > > The power architecture 2.06 or later allows the possibility of getting > machine check while in nap/sleep/winkle. The last bit of HSPRG0 is set > to 1, if thread is woken up from winkle. Hence, clear the last bit of > HSPRG0 (r13) before MCE handler starts using it as paca pointer. > > Also, the current code always puts the thread into nap state irrespective > of whatever idle state it woke up from. Fix that by looking at > paca->thread_idle_state and put the thread back into same state where it > came from. > > Reported-by: Paul Mackerras <pau...@samba.org> > Signed-off-by: Mahesh Salgaonkar <mah...@linux.vnet.ibm.com> > Reviewed-by: Shreyas B. Prabhu <shre...@linux.vnet.ibm.com>
Applied to powerpc fixes, thanks. https://git.kernel.org/powerpc/c/bc14c49195e49b3231c01e4c44 cheers
