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authorDaniel Hellstrom <daniel@gaisler.com>2011-05-02 00:08:51 +0000
committerDavid S. Miller <davem@davemloft.net>2011-05-16 13:07:43 -0700
commitd6d048192b1d22cb8f09da0cc936095ec2cb969c (patch)
tree1fcb2aac7a706074a59c329a2e25cac5cc171255 /arch/sparc/kernel/irq_32.c
parent2645e7219e88d1e2ab8b2939537bce36e6db9e8c (diff)
sparc32: implement SMP IPIs using the generic functions
The current sparc32 SMP IPI generation is implemented the cross call function. The cross call function uses IRQ15 the NMI, this is has the effect that IPIs will interrupt IRQ critical areas and hang the system. Typically on/after spin_lock_irqsave calls can be aborted. The cross call functionality must still exist to flush cache/TLBS. This patch provides CPU models a custom way to implement generation of IPIs on the generic code's request. The typical approach is to generate an IRQ for each IPI case. After this patch each sparc32 SMP CPU model needs to implement IPIs in order to function properly. Signed-off-by: Daniel Hellstrom <daniel@gaisler.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc/kernel/irq_32.c')
-rw-r--r--arch/sparc/kernel/irq_32.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/sparc/kernel/irq_32.c b/arch/sparc/kernel/irq_32.c
index 197e1ba8548..9b89d842913 100644
--- a/arch/sparc/kernel/irq_32.c
+++ b/arch/sparc/kernel/irq_32.c
@@ -206,6 +206,16 @@ int arch_show_interrupts(struct seq_file *p, int prec)
{
int j;
+#ifdef CONFIG_SMP
+ seq_printf(p, "RES: ");
+ for_each_online_cpu(j)
+ seq_printf(p, "%10u ", cpu_data(j).irq_resched_count);
+ seq_printf(p, " IPI rescheduling interrupts\n");
+ seq_printf(p, "CAL: ");
+ for_each_online_cpu(j)
+ seq_printf(p, "%10u ", cpu_data(j).irq_call_count);
+ seq_printf(p, " IPI function call interrupts\n");
+#endif
seq_printf(p, "NMI: ");
for_each_online_cpu(j)
seq_printf(p, "%10u ", cpu_data(j).counter);