There is an idea just about the irq's numbers which the VGIC supports in kvm.
Look at this definition which is in arch/arm/include/adm/kvm_vgic.h file:
#define VGIC_NR_IRQS 128
I think that is a bad definition.
In my opinion, the VGIC should be used by various models, not just only
the vexpress model. Because the irq's numbers that the different models
support may be different, so I think this definition should be defined
the max number that A15 support (just like GIC which qemu simulated
in arm_gic_internal.h :
/* Maximum number of possible interrupts, determined by the GIC architecture */
#define GIC_MAXIRQ 1020
typedef struct gic_state {
...
gic_irq_state irq_state[GIC_MAXIRQ];
int irq_target[GIC_MAXIRQ];
int priority1[GIC_INTERNAL][NCPU];
...
} gic_state;
)
However, I don't think it's a good idea as the above show. The better way
qemu notify irq number(different in different models)to kvm, just like the
way qemu notify gicd's or gicc's address to kvm.
This is just my idea. Thanks.
--
Regards
Wang Haibin
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