Commit 102c05e8 authored by Nicholas Piggin's avatar Nicholas Piggin Committed by Michael Ellerman
Browse files

powerpc/pseries: Implement NMI IPI with H_SIGNAL_SYS_RESET 



Signed-off-by: default avatarNicholas Piggin <npiggin@gmail.com>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
parent c64af645

arch/powerpc/platforms/pseries/ras.c

+4 −0
Original line number Diff line number Diff line
@@ -386,6 +386,10 @@ int pSeries_system_reset_exception(struct pt_regs *regs) 
		}

		fwnmi_release_errinfo();

	}



	if (smp_handle_nmi_ipi(regs))

		return 1;



	return 0; /* need to perform reset */

}

arch/powerpc/platforms/pseries/smp.c

+22 −1
Original line number Diff line number Diff line
@@ -189,6 +189,27 @@ static void smp_pseries_cause_ipi(int 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)

{

	xics_smp_probe();
@@ -202,7 +223,7 @@ static __init void pSeries_smp_probe(void) 
static struct smp_ops_t pseries_smp_ops = {

	.message_pass	= NULL,	/* Use smp_muxed_ipi_message_pass */

	.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,

	.kick_cpu	= smp_pSeries_kick_cpu,

	.setup_cpu	= smp_setup_cpu,