x86/apic/vector: Print APIC control bits in debugfs

Extend the debugability of the vector management by adding the state bits
to the debugfs output.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Song Liu <songliubraving@fb.com>
Cc: Joerg Roedel <jroedel@suse.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Song Liu <liu.song.a23@gmail.com>
Cc: Dmitry Safonov <0x7f454c46@gmail.com>
Cc: Mike Travis <mike.travis@hpe.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Tariq Toukan <tariqt@mellanox.com>
Link: https://lkml.kernel.org/r/20180604162224.908136099@linutronix.de

diff --git a/arch/x86/kernel/apic/vector.c b/arch/x86/kernel/apic/vector.c
index b708f597eee3ab558777947f9bf8e66839eda752..35aaee4fc0287adde2e59186fc7bd093a3015cdd 100644 (file)
--- a/arch/x86/kernel/apic/vector.c
+++ b/arch/x86/kernel/apic/vector.c
@@ -588,8 +588,7 @@ error:
 static void x86_vector_debug_show(struct seq_file *m, struct irq_domain *d,
                                  struct irq_data *irqd, int ind)
 {
-       unsigned int cpu, vector, prev_cpu, prev_vector;
-       struct apic_chip_data *apicd;
+       struct apic_chip_data apicd;
        unsigned long flags;
        int irq;
 
@@ -605,24 +604,26 @@ static void x86_vector_debug_show(struct seq_file *m, struct irq_domain *d,
                return;
        }
 
-       apicd = irqd->chip_data;
-       if (!apicd) {
+       if (!irqd->chip_data) {
                seq_printf(m, "%*sVector: Not assigned\n", ind, "");
                return;
        }
 
        raw_spin_lock_irqsave(&vector_lock, flags);
-       cpu = apicd->cpu;
-       vector = apicd->vector;
-       prev_cpu = apicd->prev_cpu;
-       prev_vector = apicd->prev_vector;
+       memcpy(&apicd, irqd->chip_data, sizeof(apicd));
        raw_spin_unlock_irqrestore(&vector_lock, flags);
-       seq_printf(m, "%*sVector: %5u\n", ind, "", vector);
-       seq_printf(m, "%*sTarget: %5u\n", ind, "", cpu);
-       if (prev_vector) {
-               seq_printf(m, "%*sPrevious vector: %5u\n", ind, "", prev_vector);
-               seq_printf(m, "%*sPrevious target: %5u\n", ind, "", prev_cpu);
+
+       seq_printf(m, "%*sVector: %5u\n", ind, "", apicd.vector);
+       seq_printf(m, "%*sTarget: %5u\n", ind, "", apicd.cpu);
+       if (apicd.prev_vector) {
+               seq_printf(m, "%*sPrevious vector: %5u\n", ind, "", apicd.prev_vector);
+               seq_printf(m, "%*sPrevious target: %5u\n", ind, "", apicd.prev_cpu);
        }
+       seq_printf(m, "%*smove_in_progress: %u\n", ind, "", apicd.move_in_progress ? 1 : 0);
+       seq_printf(m, "%*sis_managed:       %u\n", ind, "", apicd.is_managed ? 1 : 0);
+       seq_printf(m, "%*scan_reserve:      %u\n", ind, "", apicd.can_reserve ? 1 : 0);
+       seq_printf(m, "%*shas_reserved:     %u\n", ind, "", apicd.has_reserved ? 1 : 0);
+       seq_printf(m, "%*scleanup_pending:  %u\n", ind, "", !hlist_unhashed(&apicd.clist));
 }
 #endif