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-rw-r--r--arch/arm/include/uapi/asm/kvm.h8
-rw-r--r--arch/arm/kvm/arm.c3
-rw-r--r--arch/arm64/include/uapi/asm/kvm.h8
-rw-r--r--virt/kvm/arm/vgic.c3
4 files changed, 18 insertions, 4 deletions
diff --git a/arch/arm/include/uapi/asm/kvm.h b/arch/arm/include/uapi/asm/kvm.h
index 2499867dd0d8..df3f60cb1168 100644
--- a/arch/arm/include/uapi/asm/kvm.h
+++ b/arch/arm/include/uapi/asm/kvm.h
@@ -195,8 +195,14 @@ struct kvm_arch_memory_slot {
#define KVM_ARM_IRQ_CPU_IRQ 0
#define KVM_ARM_IRQ_CPU_FIQ 1
-/* Highest supported SPI, from VGIC_NR_IRQS */
+/*
+ * This used to hold the highest supported SPI, but it is now obsolete
+ * and only here to provide source code level compatibility with older
+ * userland. The highest SPI number can be set via KVM_DEV_ARM_VGIC_GRP_NR_IRQS.
+ */
+#ifndef __KERNEL__
#define KVM_ARM_IRQ_GIC_MAX 127
+#endif
/* One single KVM irqchip, ie. the VGIC */
#define KVM_NR_IRQCHIPS 1
diff --git a/arch/arm/kvm/arm.c b/arch/arm/kvm/arm.c
index 6f536451ab78..d9631ecddd56 100644
--- a/arch/arm/kvm/arm.c
+++ b/arch/arm/kvm/arm.c
@@ -671,8 +671,7 @@ int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_level,
if (!irqchip_in_kernel(kvm))
return -ENXIO;
- if (irq_num < VGIC_NR_PRIVATE_IRQS ||
- irq_num > KVM_ARM_IRQ_GIC_MAX)
+ if (irq_num < VGIC_NR_PRIVATE_IRQS)
return -EINVAL;
return kvm_vgic_inject_irq(kvm, 0, irq_num, level);
diff --git a/arch/arm64/include/uapi/asm/kvm.h b/arch/arm64/include/uapi/asm/kvm.h
index c154c0b7eb60..d26832022127 100644
--- a/arch/arm64/include/uapi/asm/kvm.h
+++ b/arch/arm64/include/uapi/asm/kvm.h
@@ -188,8 +188,14 @@ struct kvm_arch_memory_slot {
#define KVM_ARM_IRQ_CPU_IRQ 0
#define KVM_ARM_IRQ_CPU_FIQ 1
-/* Highest supported SPI, from VGIC_NR_IRQS */
+/*
+ * This used to hold the highest supported SPI, but it is now obsolete
+ * and only here to provide source code level compatibility with older
+ * userland. The highest SPI number can be set via KVM_DEV_ARM_VGIC_GRP_NR_IRQS.
+ */
+#ifndef __KERNEL__
#define KVM_ARM_IRQ_GIC_MAX 127
+#endif
/* One single KVM irqchip, ie. the VGIC */
#define KVM_NR_IRQCHIPS 1
diff --git a/virt/kvm/arm/vgic.c b/virt/kvm/arm/vgic.c
index 7ed78735f611..78fb8201014f 100644
--- a/virt/kvm/arm/vgic.c
+++ b/virt/kvm/arm/vgic.c
@@ -1561,6 +1561,9 @@ int kvm_vgic_inject_irq(struct kvm *kvm, int cpuid, unsigned int irq_num,
goto out;
}
+ if (irq_num >= kvm->arch.vgic.nr_irqs)
+ return -EINVAL;
+
vcpu_id = vgic_update_irq_pending(kvm, cpuid, irq_num, level);
if (vcpu_id >= 0) {
/* kick the specified vcpu */