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KVM: arm/arm64: vgic-new: Add GICv3 world switch backend

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As the GICv3 virtual interface registers differ from their GICv2
siblings, we need different handlers for processing maintenance
interrupts and reading/writing to the LRs.
Implement the respective handler functions and connect them to
existing code to be called if the host is using a GICv3.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org>
This commit is contained in:
Marc Zyngier
2015-11-30 13:09:53 +00:00
committed by Christoffer Dall
parent 140b086dd1
commit 59529f69f5
4 changed files with 212 additions and 5 deletions
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25
virt/kvm/arm/vgic/vgic.c
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@@ -400,12 +400,18 @@ retry:
static inline void vgic_process_maintenance_interrupt(struct kvm_vcpu *vcpu)
{
vgic_v2_process_maintenance(vcpu);
if (kvm_vgic_global_state.type == VGIC_V2)
vgic_v2_process_maintenance(vcpu);
else
vgic_v3_process_maintenance(vcpu);
}
static inline void vgic_fold_lr_state(struct kvm_vcpu *vcpu)
{
vgic_v2_fold_lr_state(vcpu);
if (kvm_vgic_global_state.type == VGIC_V2)
vgic_v2_fold_lr_state(vcpu);
else
vgic_v3_fold_lr_state(vcpu);
}
/* Requires the irq_lock to be held. */
@@ -414,17 +420,26 @@ static inline void vgic_populate_lr(struct kvm_vcpu *vcpu,
{
DEBUG_SPINLOCK_BUG_ON(!spin_is_locked(&irq->irq_lock));
vgic_v2_populate_lr(vcpu, irq, lr);
if (kvm_vgic_global_state.type == VGIC_V2)
vgic_v2_populate_lr(vcpu, irq, lr);
else
vgic_v3_populate_lr(vcpu, irq, lr);
}
static inline void vgic_clear_lr(struct kvm_vcpu *vcpu, int lr)
{
vgic_v2_clear_lr(vcpu, lr);
if (kvm_vgic_global_state.type == VGIC_V2)
vgic_v2_clear_lr(vcpu, lr);
else
vgic_v3_clear_lr(vcpu, lr);
}
static inline void vgic_set_underflow(struct kvm_vcpu *vcpu)
{
vgic_v2_set_underflow(vcpu);
if (kvm_vgic_global_state.type == VGIC_V2)
vgic_v2_set_underflow(vcpu);
else
vgic_v3_set_underflow(vcpu);
}
/* Requires the ap_list_lock to be held. */