• Paul Mackerras's avatar
    powerpc/powernv: Fixes for hypervisor doorbell handling · 755563bc
    Paul Mackerras authored
    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: default avatarPaul Mackerras <paulus@samba.org>
    Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
    755563bc
dbell.c 1.34 KB