Paul Mackerras 755563bc79
powerpc/powernv: Fixes for hypervisor doorbell handling ...
Since we can now use hypervisor doorbells for host IPIs, this makes
sure we clear the host IPI flag when taking a doorbell interrupt, and
clears any pending doorbell IPI in pnv_smp_cpu_kill_self() (as we
already do for IPIs sent via the XICS interrupt controller). Otherwise
if there did happen to be a leftover pending doorbell interrupt for
an offline CPU thread for any reason, it would prevent that thread from
going into a power-saving mode; it would instead keep waking up because
of the interrupt.
Signed-off-by: Paul Mackerras <paulus@samba.org >
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au >
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