KVM: arm/arm64: vgic-its: Check the LPI translation cache on MSI injection (86a7dae8) · Commits · 戴 / test

virt/kvm/arm/vgic/vgic-its.c

+36 −0

Original line number	Diff line number	Diff line
		@@ -566,6 +566,20 @@ static struct vgic_irq __vgic_its_check_cache(struct vgic_dist dist,
		return NULL;
		}

		static struct vgic_irq vgic_its_check_cache(struct kvm kvm, phys_addr_t db,
		u32 devid, u32 eventid)
		{
		struct vgic_dist *dist = &kvm->arch.vgic;
		struct vgic_irq *irq;
		unsigned long flags;

		raw_spin_lock_irqsave(&dist->lpi_list_lock, flags);
		irq = __vgic_its_check_cache(dist, db, devid, eventid);
		raw_spin_unlock_irqrestore(&dist->lpi_list_lock, flags);

		return irq;
		}

		static void vgic_its_cache_translation(struct kvm kvm, struct vgic_its its,
		u32 devid, u32 eventid,
		struct vgic_irq *irq)
		@@ -725,6 +739,25 @@ static int vgic_its_trigger_msi(struct kvm kvm, struct vgic_its its,
		return 0;
		}

		int vgic_its_inject_cached_translation(struct kvm kvm, struct kvm_msi msi)
		{
		struct vgic_irq *irq;
		unsigned long flags;
		phys_addr_t db;

		db = (u64)msi->address_hi << 32 \| msi->address_lo;
		irq = vgic_its_check_cache(kvm, db, msi->devid, msi->data);

		if (!irq)
		return -1;

		raw_spin_lock_irqsave(&irq->irq_lock, flags);
		irq->pending_latch = true;
		vgic_queue_irq_unlock(kvm, irq, flags);

		return 0;
		}

		/*
		* Queries the KVM IO bus framework to get the ITS pointer from the given
		* doorbell address.
		@@ -736,6 +769,9 @@ int vgic_its_inject_msi(struct kvm kvm, struct kvm_msi msi)
		struct vgic_its *its;
		int ret;

		if (!vgic_its_inject_cached_translation(kvm, msi))
		return 1;

		its = vgic_msi_to_its(kvm, msi);
		if (IS_ERR(its))
		return PTR_ERR(its);

+1 −0

Original line number	Diff line number	Diff line
		@@ -308,6 +308,7 @@ int vgic_copy_lpi_list(struct kvm kvm, struct kvm_vcpu vcpu, u32 **intid_ptr);
		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);
		int vgic_its_inject_cached_translation(struct kvm kvm, struct kvm_msi msi);
		void vgic_lpi_translation_cache_init(struct kvm *kvm);
		void vgic_lpi_translation_cache_destroy(struct kvm *kvm);
		void vgic_its_invalidate_cache(struct kvm *kvm);