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powerpc/pseries: Implement NMI IPI with H_SIGNAL_SYS_RESET

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Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Nicholas Piggin 2016-12-20 04:30:10 +10:00 committed by Michael Ellerman
parent c64af6458e
commit 102c05e8dc
2 changed files with 26 additions and 1 deletions
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4
arch/powerpc/platforms/pseries/ras.c
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@ -386,6 +386,10 @@ int pSeries_system_reset_exception(struct pt_regs *regs)
} }
fwnmi_release_errinfo(); fwnmi_release_errinfo();
} }
if (smp_handle_nmi_ipi(regs))
return 1;
return 0; /* need to perform reset */ return 0; /* need to perform reset */
} }

23
arch/powerpc/platforms/pseries/smp.c
View File

@ -189,6 +189,27 @@ static void smp_pseries_cause_ipi(int cpu)
icp_ops->cause_ipi(cpu); icp_ops->cause_ipi(cpu);
} }
static int pseries_cause_nmi_ipi(int cpu)
{
int hwcpu;
if (cpu == NMI_IPI_ALL_OTHERS) {
hwcpu = H_SIGNAL_SYS_RESET_ALL_OTHERS;
} else {
if (cpu < 0) {
WARN_ONCE(true, "incorrect cpu parameter %d", cpu);
return 0;
}
hwcpu = get_hard_smp_processor_id(cpu);
}
if (plapr_signal_sys_reset(hwcpu) == H_SUCCESS)
return 1;
return 0;
}
static __init void pSeries_smp_probe(void) static __init void pSeries_smp_probe(void)
{ {
xics_smp_probe(); xics_smp_probe();
@ -202,7 +223,7 @@ static __init void pSeries_smp_probe(void)
static struct smp_ops_t pseries_smp_ops = { static struct smp_ops_t pseries_smp_ops = {
.message_pass = NULL, /* Use smp_muxed_ipi_message_pass */ .message_pass = NULL, /* Use smp_muxed_ipi_message_pass */
.cause_ipi = NULL, /* Filled at runtime by pSeries_smp_probe() */ .cause_ipi = NULL, /* Filled at runtime by pSeries_smp_probe() */
.cause_nmi_ipi = NULL, .cause_nmi_ipi = pseries_cause_nmi_ipi,
.probe = pSeries_smp_probe, .probe = pSeries_smp_probe,
.kick_cpu = smp_pSeries_kick_cpu, .kick_cpu = smp_pSeries_kick_cpu,
.setup_cpu = smp_setup_cpu, .setup_cpu = smp_setup_cpu,