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powerpc: Change the doorbell IPI calling convention

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Change the doorbell callers to know about their msgsnd addressing,
rather than have them set a per-cpu target data tag at boot that gets
sent to the cause_ipi functions. The data is only used for doorbell IPI
functions, no other IPI types, so it makes sense to keep that detail
local to doorbell.

Have the platform code understand doorbell IPIs, rather than the
interrupt controller code understand them. Platform code can look at
capabilities it has available and decide which to use.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Nicholas Piggin
2017-04-13 20:16:21 +10:00
committed by Michael Ellerman
parent 9b7ff0c658
commit b866cc2199
14 changed files with 95 additions and 82 deletions
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6
arch/powerpc/sysdev/xive/common.c
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@@ -834,15 +834,15 @@ static void xive_irq_free_data(unsigned int virq)
#ifdef CONFIG_SMP
static void xive_cause_ipi(int cpu, unsigned long msg)
static void xive_cause_ipi(int cpu)
{
struct xive_cpu *xc;
struct xive_irq_data *xd;
xc = per_cpu(xive_cpu, cpu);
DBG_VERBOSE("IPI msg#%ld CPU %d -> %d (HW IRQ 0x%x)\n",
msg, smp_processor_id(), cpu, xc->hw_ipi);
DBG_VERBOSE("IPI CPU %d -> %d (HW IRQ 0x%x)\n",
smp_processor_id(), cpu, xc->hw_ipi);
xd = &xc->ipi_data;
if (WARN_ON(!xd->trig_mmio))