powerpc: Change the doorbell IPI calling convention

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>

5 files changed, 6 insertions, 19 deletions

diff --git a/arch/powerpc/sysdev/xics/icp-hv.c b/arch/powerpc/sysdev/xics/icp-hv.c
index e7fa26c4ff73..bbc839a98c41 100644
--- a/arch/powerpc/sysdev/xics/icp-hv.c
+++ b/arch/powerpc/sysdev/xics/icp-hv.c
@@ -138,7 +138,7 @@ static void icp_hv_set_cpu_priority(unsigned char cppr)
 
 #ifdef CONFIG_SMP
 
-static void icp_hv_cause_ipi(int cpu, unsigned long data)
+static void icp_hv_cause_ipi(int cpu)
 {
 	icp_hv_set_qirr(cpu, IPI_PRIORITY);
 }
diff --git a/arch/powerpc/sysdev/xics/icp-native.c b/arch/powerpc/sysdev/xics/icp-native.c
index f0f3f47a3fc9..2bfb9968d562 100644
--- a/arch/powerpc/sysdev/xics/icp-native.c
+++ b/arch/powerpc/sysdev/xics/icp-native.c
@@ -143,19 +143,9 @@ static unsigned int icp_native_get_irq(void)
 
 #ifdef CONFIG_SMP
 
-static void icp_native_cause_ipi(int cpu, unsigned long data)
+static void icp_native_cause_ipi(int cpu)
 {
 	kvmppc_set_host_ipi(cpu, 1);
-#ifdef CONFIG_PPC_DOORBELL
-	if (cpu_has_feature(CPU_FTR_DBELL)) {
-		if (cpumask_test_cpu(cpu, cpu_sibling_mask(get_cpu()))) {
-			doorbell_cause_ipi(cpu, data);
-			put_cpu();
-			return;
-		}
-		put_cpu();
-	}
-#endif
 	icp_native_set_qirr(cpu, IPI_PRIORITY);
 }
 
diff --git a/arch/powerpc/sysdev/xics/icp-opal.c b/arch/powerpc/sysdev/xics/icp-opal.c
index b53f80f0b4d8..c71d2ea42627 100644
--- a/arch/powerpc/sysdev/xics/icp-opal.c
+++ b/arch/powerpc/sysdev/xics/icp-opal.c
@@ -126,7 +126,7 @@ static void icp_opal_eoi(struct irq_data *d)
 
 #ifdef CONFIG_SMP
 
-static void icp_opal_cause_ipi(int cpu, unsigned long data)
+static void icp_opal_cause_ipi(int cpu)
 {
 	int hw_cpu = get_hard_smp_processor_id(cpu);
 
diff --git a/arch/powerpc/sysdev/xics/xics-common.c b/arch/powerpc/sysdev/xics/xics-common.c
index 23efe4e42172..2eb53c12ee6e 100644
--- a/arch/powerpc/sysdev/xics/xics-common.c
+++ b/arch/powerpc/sysdev/xics/xics-common.c
@@ -143,9 +143,6 @@ static void xics_request_ipi(void)
 
 void __init xics_smp_probe(void)
 {
-	/* Setup cause_ipi callback  based on which ICP is used */
-	smp_ops->cause_ipi = icp_ops->cause_ipi;
-
 	/* Register all the IPIs */
 	xics_request_ipi();
 }
diff --git a/arch/powerpc/sysdev/xive/common.c b/arch/powerpc/sysdev/xive/common.c
index d9cd7f705f21..6a98efb14264 100644
--- a/arch/powerpc/sysdev/xive/common.c
+++ b/arch/powerpc/sysdev/xive/common.c
@@ -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))