[PATCH 6/14] ps3: smp interrupt fixes

[Geoff Levand]

PS3 fixups for interrups on SMP.

Fixes the alignment of the interrupt status bitmap, changes the hypervisor
interrupt calls to the '_ext' versions that take an explicit processor
thread ID, and sets the cpu_features flag CPU_FTR_SMT.


Signed-off-by: Geoff Levand <geoffrey.levand at am.sony.com>

---
 arch/powerpc/platforms/ps3/interrupt.c |   64 +++++++++++++++------------------
 arch/powerpc/platforms/ps3/setup.c     |    1 
 2 files changed, 32 insertions(+), 33 deletions(-)

--- ps3-linux-dev.orig/arch/powerpc/platforms/ps3/interrupt.c
+++ ps3-linux-dev/arch/powerpc/platforms/ps3/interrupt.c
@@ -317,22 +317,23 @@ struct ps3_bmp {
 		unsigned long unused_1[3];
 		unsigned long mask;
 		unsigned long unused_2[3];
-	} __attribute__ ((packed));
+	} __attribute__ ((aligned (64)));
+
 	spinlock_t lock;
 	unsigned long ipi_debug_brk_mask;
 };
 
 /**
  * struct ps3_private - a per cpu data structure
- * @node: HV node id
- * @cpu: HV thread id
- * @bmp: an HV ps3_bmp structure
+ * @bmp: ps3_bmp structure
+ * @node: HV logical_ppe_id
+ * @cpu: HV thread_id
  */
 
 struct ps3_private {
+	struct ps3_bmp bmp;
 	unsigned long node;
 	unsigned int cpu;
-	struct ps3_bmp bmp;
 };
 
 #if defined(DEBUG)
@@ -389,9 +390,8 @@ static void ps3_chip_mask(unsigned int v
 
 	spin_lock_irqsave(&pd->bmp.lock, flags);
 	pd->bmp.mask &= ~(0x8000000000000000UL >> virq);
-	spin_unlock_irqrestore(&pd->bmp.lock, flags);
-
 	lv1_did_update_interrupt_mask(pd->node, pd->cpu);
+	spin_unlock_irqrestore(&pd->bmp.lock, flags);
 }
 
 static void ps3_chip_unmask(unsigned int virq)
@@ -406,14 +406,14 @@ static void ps3_chip_unmask(unsigned int
 
 	spin_lock_irqsave(&pd->bmp.lock, flags);
 	pd->bmp.mask |= (0x8000000000000000UL >> virq);
-	spin_unlock_irqrestore(&pd->bmp.lock, flags);
-
 	lv1_did_update_interrupt_mask(pd->node, pd->cpu);
+	spin_unlock_irqrestore(&pd->bmp.lock, flags);
 }
 
 static void ps3_chip_eoi(unsigned int virq)
 {
-	lv1_end_of_interrupt(virq);
+	const struct ps3_private *pd = get_irq_chip_data(virq);
+	lv1_end_of_interrupt_ext(pd->node, pd->cpu, virq);
 }
 
 static struct irq_chip irq_chip = {
@@ -426,10 +426,12 @@ static struct irq_chip irq_chip = {
 static void ps3_host_unmap(struct irq_host *h, unsigned int virq)
 {
 	int result;
+	const struct ps3_private *pd = get_irq_chip_data(virq);
 
-	pr_debug("%s:%d: virq %d\n", __func__, __LINE__, virq);
+	pr_debug("%s:%d: node %lu, cpu %d, virq %u\n", __func__, __LINE__,
+		pd->node, pd->cpu, virq);
 
-	lv1_disconnect_irq_plug(virq);
+	lv1_disconnect_irq_plug_ext(pd->node, pd->cpu, virq);
 
 	result = set_irq_chip_data(virq, NULL);
 	BUG_ON(result);
@@ -441,31 +443,26 @@ static int ps3_host_map(struct irq_host 
 	irq_hw_number_t hwirq)
 {
 	int result;
-	unsigned int cpu;
+	struct ps3_private *pd = &__get_cpu_var(ps3_private);
+
+	pr_debug("%s:%d: node %lu, cpu %d, hwirq %lu => virq %u\n", __func__,
+		__LINE__, pd->node, pd->cpu, hwirq, virq);
 
-	pr_debug(" -> %s:%d\n", __func__, __LINE__);
-	pr_debug("%s:%d: hwirq %lu => virq %u\n", __func__, __LINE__, hwirq,
-		virq);
-
-	/* bind this virq to a cpu */
-
-	preempt_disable();
-	cpu = smp_processor_id();
-	result = lv1_connect_irq_plug(virq, hwirq);
-	preempt_enable();
+	/* Binds this virq to pd->cpu (current cpu) */
+
+	result = lv1_connect_irq_plug_ext(pd->node, pd->cpu, virq, hwirq, 0);
 
 	if (result) {
-		pr_info("%s:%d: lv1_connect_irq_plug failed:"
+		pr_info("%s:%d: lv1_connect_irq_plug_ext failed:"
 			" %s\n", __func__, __LINE__, ps3_result(result));
 		return -EPERM;
 	}
 
-	result = set_irq_chip_data(virq, &per_cpu(ps3_private, cpu));
+	result = set_irq_chip_data(virq, pd);
 	BUG_ON(result);
 
 	set_irq_chip_and_handler(virq, &irq_chip, handle_fasteoi_irq);
 
-	pr_debug(" <- %s:%d\n", __func__, __LINE__);
 	return result;
 }
 
@@ -544,12 +541,9 @@ unsigned int ps3_get_irq(void)
 void __init ps3_init_IRQ(void)
 {
 	int result;
-	unsigned long node;
 	unsigned cpu;
 	struct irq_host *host;
 
-	lv1_get_logical_ppe_id(&node);
-
 	host = irq_alloc_host(IRQ_HOST_MAP_NOMAP, 0, &ps3_host_ops,
 		PS3_INVALID_OUTLET);
 	irq_set_default_host(host);
@@ -558,12 +552,16 @@ void __init ps3_init_IRQ(void)
 	for_each_possible_cpu(cpu) {
 		struct ps3_private *pd = &per_cpu(ps3_private, cpu);
 
-		pd->node = node;
-		pd->cpu = cpu;
+		lv1_get_logical_ppe_id(&pd->node);
+		pd->cpu = get_hard_smp_processor_id(cpu);
 		spin_lock_init(&pd->bmp.lock);
 
-		result = lv1_configure_irq_state_bitmap(node, cpu,
-			ps3_mm_phys_to_lpar(__pa(&pd->bmp.status)));
+		pr_debug("%s:%d: node %lu, cpu %d, bmp %lxh\n", __func__,
+			__LINE__, pd->node, pd->cpu,
+			ps3_mm_phys_to_lpar(__pa(&pd->bmp)));
+
+		result = lv1_configure_irq_state_bitmap(pd->node, pd->cpu,
+			ps3_mm_phys_to_lpar(__pa(&pd->bmp)));
 
 		if (result)
 			pr_debug("%s:%d: lv1_configure_irq_state_bitmap failed:"
--- ps3-linux-dev.orig/arch/powerpc/platforms/ps3/setup.c
+++ ps3-linux-dev/arch/powerpc/platforms/ps3/setup.c
@@ -109,6 +109,7 @@ static int __init ps3_probe(void)
 		return 0;
 
 	powerpc_firmware_features |= FW_FEATURE_PS3_POSSIBLE;
+	cur_cpu_spec->cpu_features |= CPU_FTR_SMT;
 
 	ps3_os_area_init();
 	ps3_mm_init();