The Versatile Express TC2 board, which we use as our main emulated
platform in QEMU, defines 160+32 == 192 interrupts, so limiting the
number of interrupts to 128 is not quite going to cut it for real board
emulation.
Note that this didn't use to be a problem because QEMU was buggy and
only defined 128 interrupts until recently.
[ Sending this as an RFC, because I haven't convinced myself that
this is even the right short-term fix. On a longer-term we probably
need a way for QEMU to tell the kernel how many IRQs it needs for a
particular implementation of a CPU and a GIC, but on a shorter term
we should at least support a real A15 configuration. Note that this
change increases the in-kernel memory consumption quite a bit,
especially due to the irq-to-lr map, which could be reversed or
turned into a hash table or list, at the sacrifice of some
performance during world-switches to search the data structure. ]
Signed-off-by: Christoffer Dall <christoffer.dall@xxxxxxxxxx>
---
include/kvm/arm_vgic.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/kvm/arm_vgic.h b/include/kvm/arm_vgic.h
index 343744e..7e2d158 100644
--- a/include/kvm/arm_vgic.h
+++ b/include/kvm/arm_vgic.h
@@ -26,7 +26,7 @@
#include <linux/types.h>
#include <linux/irqchip/arm-gic.h>
-#define VGIC_NR_IRQS 128
+#define VGIC_NR_IRQS 256
#define VGIC_NR_SGIS 16
#define VGIC_NR_PPIS 16
#define VGIC_NR_PRIVATE_IRQS (VGIC_NR_SGIS + VGIC_NR_PPIS)
--
1.7.10.4
--
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