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KVM: arm/arm64: GICv4: Add property field and per-VM predicate

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Add a new has_gicv4 field in the global VGIC state that indicates
whether the HW is GICv4 capable, as a per-VM predicate indicating
if there is a possibility for a VM to support direct injection
(the above being true and the VM having an ITS).

Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
This commit is contained in:
Marc Zyngier 2017-10-27 15:28:37 +01:00 committed by Christoffer Dall
parent 08c9fd0421
commit e7c4805924
3 changed files with 10 additions and 0 deletions
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3
include/kvm/arm_vgic.h
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@ -73,6 +73,9 @@ struct vgic_global {
/* Only needed for the legacy KVM_CREATE_IRQCHIP */
bool can_emulate_gicv2;
/* Hardware has GICv4? */
bool has_gicv4;
/* GIC system register CPU interface */
struct static_key_false gicv3_cpuif;

5
virt/kvm/arm/vgic/vgic-mmio-v3.c
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@ -54,6 +54,11 @@ bool vgic_has_its(struct kvm *kvm)
return dist->has_its;
}
bool vgic_supports_direct_msis(struct kvm *kvm)
{
return kvm_vgic_global_state.has_gicv4 && vgic_has_its(kvm);
}
static unsigned long vgic_mmio_read_v3_misc(struct kvm_vcpu *vcpu,
gpa_t addr, unsigned int len)
{

2
virt/kvm/arm/vgic/vgic.h
View File

@ -241,4 +241,6 @@ int vgic_its_resolve_lpi(struct kvm *kvm, struct vgic_its *its,
u32 devid, u32 eventid, struct vgic_irq **irq);
struct vgic_its *vgic_msi_to_its(struct kvm *kvm, struct kvm_msi *msi);
bool vgic_supports_direct_msis(struct kvm *kvm);
#endif