[PATCH 1/2] x86, ioapic: Print IR_IO_APIC_route_entry when IR is enabled
From: Naga Chumbalkar
Date: Tue Jul 12 2011 - 01:03:37 EST
When IR (interrupt remapping) is enabled print_IO_APIC() displays output according
to legacy RTE (redirection table entry) definitons:
NR Dst Mask Trig IRR Pol Stat Dmod Deli Vect:
00 00 1 0 0 0 0 0 0 00
01 00 0 0 0 0 0 0 0 01
02 00 0 0 0 0 0 0 0 02
03 00 1 0 0 0 0 0 0 03
04 00 1 0 0 0 0 0 0 04
05 00 1 0 0 0 0 0 0 05
06 00 1 0 0 0 0 0 0 06
...
The above output is as per Sec 3.2.4 of the IOAPIC datasheet:
82093AA I/O Advanced Programmable Interrupt Controller (IOAPIC):
http://download.intel.com/design/chipsets/datashts/29056601.pdf
Instead the output should display the fields as discussed in Sec 5.5.1
of the VT-d specification:
(Intel Virtualization Technology for Directed I/O:
http://download.intel.com/technology/computing/vptech/Intel(r)_VT_for_Direct_IO.pdf)
After the fix:
NR Indx Fmt Mask Trig IRR Pol Stat Indx2 Zero Vect:
00 0000 0 1 0 0 0 0 0 0 00
NR Indx Fmt Mask Trig IRR Pol Stat Indx2 Zero Vect:
01 000F 1 0 0 0 0 0 0 0 01
NR Indx Fmt Mask Trig IRR Pol Stat Indx2 Zero Vect:
02 0001 1 0 0 0 0 0 0 0 02
NR Indx Fmt Mask Trig IRR Pol Stat Indx2 Zero Vect:
03 0002 1 1 0 0 0 0 0 0 03
NR Indx Fmt Mask Trig IRR Pol Stat Indx2 Zero Vect:
04 0011 1 1 0 0 0 0 0 0 04
NR Indx Fmt Mask Trig IRR Pol Stat Indx2 Zero Vect:
05 0004 1 1 0 0 0 0 0 0 05
NR Indx Fmt Mask Trig IRR Pol Stat Indx2 Zero Vect:
06 0005 1 1 0 0 0 0 0 0 06
...
Signed-off-by: Naga Chumbalkar <nagananda.chumbalkar@xxxxxx>
---
arch/x86/kernel/apic/io_apic.c | 75 ++++++++++++++++++++++++++++------------
1 files changed, 53 insertions(+), 22 deletions(-)
diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c
index 5cba200..3b139aa 100644
--- a/arch/x86/kernel/apic/io_apic.c
+++ b/arch/x86/kernel/apic/io_apic.c
@@ -1552,31 +1552,62 @@ __apicdebuginit(void) print_IO_APIC(void)
printk(KERN_DEBUG ".... IRQ redirection table:\n");
- printk(KERN_DEBUG " NR Dst Mask Trig IRR Pol"
- " Stat Dmod Deli Vect:\n");
-
for (i = 0; i <= reg_01.bits.entries; i++) {
- struct IO_APIC_route_entry entry;
-
- entry = ioapic_read_entry(apic, i);
-
- printk(KERN_DEBUG " %02x %02X ",
- i,
- entry.dest
- );
+ if (intr_remapping_enabled) {
+ struct IO_APIC_route_entry entry;
+ struct IR_IO_APIC_route_entry *ir_entry;
+
+ printk(KERN_DEBUG " NR Indx Fmt Mask Trig IRR"
+ " Pol Stat Indx2 Zero Vect:\n");
+
+ entry = ioapic_read_entry(apic, i);
+ ir_entry = (struct IR_IO_APIC_route_entry *) &entry;
+
+ printk(KERN_DEBUG " %02x %04X ",
+ i,
+ ir_entry->index
+ );
+
+ printk("%1d %1d %1d %1d %1d "
+ "%1d %1d %X %02X\n",
+ ir_entry->format,
+ ir_entry->mask,
+ ir_entry->trigger,
+ ir_entry->irr,
+ ir_entry->polarity,
+ ir_entry->delivery_status,
+ ir_entry->index2,
+ ir_entry->zero,
+ ir_entry->vector
+ );
+ } else {
+ struct IO_APIC_route_entry entry;
- printk("%1d %1d %1d %1d %1d %1d %1d %02X\n",
- entry.mask,
- entry.trigger,
- entry.irr,
- entry.polarity,
- entry.delivery_status,
- entry.dest_mode,
- entry.delivery_mode,
- entry.vector
- );
+ printk(KERN_DEBUG " NR Dst Mask Trig IRR Pol"
+ " Stat Dmod Deli Vect:\n");
+
+ entry = ioapic_read_entry(apic, i);
+
+ printk(KERN_DEBUG " %02x %02X ",
+ i,
+ entry.dest
+ );
+
+ printk("%1d %1d %1d %1d %1d "
+ "%1d %1d %02X\n",
+ entry.mask,
+ entry.trigger,
+ entry.irr,
+ entry.polarity,
+ entry.delivery_status,
+ entry.dest_mode,
+ entry.delivery_mode,
+ entry.vector
+ );
+ }
}
}
+
printk(KERN_DEBUG "IRQ to pin mappings:\n");
for_each_active_irq(irq) {
struct irq_pin_list *entry;
--
1.7.1
--
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