[SPARC64]: Add ->set_affinity IRQ handlers.

dr-cpu unconfigure requests will walk throught he enabled
IRQs and trigger ->set_affinity so that the going-down
cpu no longer has INOs targetted to it.

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 52 insertions, 0 deletions

diff --git a/arch/sparc64/kernel/irq.c b/arch/sparc64/kernel/irq.c
index 634194e7d2d6..a1c916f35baa 100644
--- a/arch/sparc64/kernel/irq.c
+++ b/arch/sparc64/kernel/irq.c
@@ -293,6 +293,11 @@ static void sun4u_irq_enable(unsigned int virt_irq)
         }
 }
 
+static void sun4u_set_affinity(unsigned int virt_irq, cpumask_t mask)
+{
+        sun4u_irq_enable(virt_irq);
+}
+
 static void sun4u_irq_disable(unsigned int virt_irq)
 {
         struct irq_handler_data *data = get_irq_chip_data(virt_irq);
@@ -344,6 +349,24 @@ static void sun4v_irq_enable(unsigned int virt_irq)
         }
 }
 
+static void sun4v_set_affinity(unsigned int virt_irq, cpumask_t mask)
+{
+        struct ino_bucket *bucket = virt_irq_to_bucket(virt_irq);
+        unsigned int ino = bucket - &ivector_table[0];
+
+        if (likely(bucket)) {
+                unsigned long cpuid;
+                int err;
+
+                cpuid = irq_choose_cpu(virt_irq);
+
+                err = sun4v_intr_settarget(ino, cpuid);
+                if (err != HV_EOK)
+                        printk("sun4v_intr_settarget(%x,%lu): err(%d)\n",
+                               ino, cpuid, err);
+        }
+}
+
 static void sun4v_irq_disable(unsigned int virt_irq)
 {
         struct ino_bucket *bucket = virt_irq_to_bucket(virt_irq);
@@ -426,6 +449,28 @@ static void sun4v_virq_enable(unsigned int virt_irq)
         }
 }
 
+static void sun4v_virt_set_affinity(unsigned int virt_irq, cpumask_t mask)
+{
+        struct ino_bucket *bucket = virt_irq_to_bucket(virt_irq);
+        unsigned int ino = bucket - &ivector_table[0];
+
+        if (likely(bucket)) {
+                unsigned long cpuid, dev_handle, dev_ino;
+                int err;
+
+                cpuid = irq_choose_cpu(virt_irq);
+
+                dev_handle = ino & IMAP_IGN;
+                dev_ino = ino & IMAP_INO;
+
+                err = sun4v_vintr_set_target(dev_handle, dev_ino, cpuid);
+                if (err != HV_EOK)
+                        printk("sun4v_vintr_set_target(%lx,%lx,%lu): "
+                               "err(%d)\n",
+                               dev_handle, dev_ino, cpuid, err);
+        }
+}
+
 static void sun4v_virq_disable(unsigned int virt_irq)
 {
         struct ino_bucket *bucket = virt_irq_to_bucket(virt_irq);
@@ -489,6 +534,7 @@ static struct irq_chip sun4u_irq = {
         .enable         = sun4u_irq_enable,
         .disable        = sun4u_irq_disable,
         .end            = sun4u_irq_end,
+        .set_affinity   = sun4u_set_affinity,
 };
 
 static struct irq_chip sun4u_irq_ack = {
@@ -497,6 +543,7 @@ static struct irq_chip sun4u_irq_ack = {
         .disable        = sun4u_irq_disable,
         .ack            = run_pre_handler,
         .end            = sun4u_irq_end,
+        .set_affinity   = sun4u_set_affinity,
 };
 
 static struct irq_chip sun4v_irq = {
@@ -504,6 +551,7 @@ static struct irq_chip sun4v_irq = {
         .enable         = sun4v_irq_enable,
         .disable        = sun4v_irq_disable,
         .end            = sun4v_irq_end,
+        .set_affinity   = sun4v_set_affinity,
 };
 
 static struct irq_chip sun4v_irq_ack = {
@@ -512,6 +560,7 @@ static struct irq_chip sun4v_irq_ack = {
         .disable        = sun4v_irq_disable,
         .ack            = run_pre_handler,
         .end            = sun4v_irq_end,
+        .set_affinity   = sun4v_set_affinity,
 };
 
 #ifdef CONFIG_PCI_MSI
@@ -523,6 +572,7 @@ static struct irq_chip sun4v_msi = {
         .disable        = sun4v_msi_disable,
         .ack            = run_pre_handler,
         .end            = sun4v_irq_end,
+        .set_affinity   = sun4v_set_affinity,
 };
 #endif
 
@@ -531,6 +581,7 @@ static struct irq_chip sun4v_virq = {
         .enable         = sun4v_virq_enable,
         .disable        = sun4v_virq_disable,
         .end            = sun4v_virq_end,
+        .set_affinity   = sun4v_virt_set_affinity,
 };
 
 static struct irq_chip sun4v_virq_ack = {
@@ -539,6 +590,7 @@ static struct irq_chip sun4v_virq_ack = {
         .disable        = sun4v_virq_disable,
         .ack            = run_pre_handler,
         .end            = sun4v_virq_end,
+        .set_affinity   = sun4v_virt_set_affinity,
 };
 
 void irq_install_pre_handler(int virt_irq,