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ppc: Reset the interrupt presenter from the CPU reset handler

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On the sPAPR machine and PowerNV machine, the interrupt presenters are
created by a machine handler at the core level and are reset
independently. This is not consistent and it raises issues when it
comes to handle hot-plugged CPUs. In that case, the presenters are not
reset. This is less of an issue in XICS, although a zero MFFR could
be a concern, but in XIVE, the OS CAM line is not set and this breaks
the presenting algorithm. The current code has workarounds which need
a global cleanup.

Extend the sPAPR IRQ backend and the PowerNV Chip class with a new
cpu_intc_reset() handler called by the CPU reset handler and remove
the XiveTCTX reset handler which is now redundant.

Signed-off-by: Cédric Le Goater <clg@kaod.org>
Message-Id: <20191022163812.330-6-clg@kaod.org>
Reviewed-by: Greg Kurz <groug@kaod.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Cédric Le Goater 2019-10-22 18:38:10 +02:00 • committed by David Gibson
parent aa5ac64b23
commit d49e8a9b46
12 changed files with 65 additions and 20 deletions
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14
hw/ppc/spapr_irq.c
View file

@ -220,6 +220,20 @@ int spapr_irq_cpu_intc_create(SpaprMachineState *spapr,
return 0;
}
void spapr_irq_cpu_intc_reset(SpaprMachineState *spapr, PowerPCCPU *cpu)
{
SpaprInterruptController *intcs[] = ALL_INTCS(spapr);
int i;
for (i = 0; i < ARRAY_SIZE(intcs); i++) {
SpaprInterruptController *intc = intcs[i];
if (intc) {
SpaprInterruptControllerClass *sicc = SPAPR_INTC_GET_CLASS(intc);
sicc->cpu_intc_reset(intc, cpu);
}
}
}
static void spapr_set_irq(void *opaque, int irq, int level)
{
SpaprMachineState *spapr = SPAPR_MACHINE(opaque);