KVM: arm/arm64: vgic: Add LPI translation cache definition (24cab82c) · Commits · 戴 / test

include/kvm/arm_vgic.h

+3 −0

Original line number	Diff line number	Diff line
		@@ -249,6 +249,9 @@ struct vgic_dist {
		struct list_head lpi_list_head;
		int lpi_list_count;

		/* LPI translation cache */
		struct list_head lpi_translation_cache;

		/* used by vgic-debug */
		struct vgic_state_iter *iter;

+5 −0

Original line number	Diff line number	Diff line
		@@ -53,6 +53,7 @@ void kvm_vgic_early_init(struct kvm *kvm)
		struct vgic_dist *dist = &kvm->arch.vgic;

		INIT_LIST_HEAD(&dist->lpi_list_head);
		INIT_LIST_HEAD(&dist->lpi_translation_cache);
		raw_spin_lock_init(&dist->lpi_list_lock);
		}

		@@ -294,6 +295,7 @@ int vgic_init(struct kvm *kvm)
		}

		if (vgic_has_its(kvm)) {
		vgic_lpi_translation_cache_init(kvm);
		ret = vgic_v4_init(kvm);
		if (ret)
		goto out;
		@@ -335,6 +337,9 @@ static void kvm_vgic_dist_destroy(struct kvm *kvm)
		INIT_LIST_HEAD(&dist->rd_regions);
		}

		if (vgic_has_its(kvm))
		vgic_lpi_translation_cache_destroy(kvm);

		if (vgic_supports_direct_msis(kvm))
		vgic_v4_teardown(kvm);
		}

+49 −0

Original line number	Diff line number	Diff line
		@@ -138,6 +138,14 @@ struct its_ite {
		u32 event_id;
		};

		struct vgic_translation_cache_entry {
		struct list_head entry;
		phys_addr_t db;
		u32 devid;
		u32 eventid;
		struct vgic_irq *irq;
		};

		/**
		* struct vgic_its_abi - ITS abi ops and settings
		* @cte_esz: collection table entry size
		@@ -1657,6 +1665,45 @@ out:
		return ret;
		}

		/* Default is 16 cached LPIs per vcpu */
		#define LPI_DEFAULT_PCPU_CACHE_SIZE 16

		void vgic_lpi_translation_cache_init(struct kvm *kvm)
		{
		struct vgic_dist *dist = &kvm->arch.vgic;
		unsigned int sz;
		int i;

		if (!list_empty(&dist->lpi_translation_cache))
		return;

		sz = atomic_read(&kvm->online_vcpus) * LPI_DEFAULT_PCPU_CACHE_SIZE;

		for (i = 0; i < sz; i++) {
		struct vgic_translation_cache_entry *cte;

		/* An allocation failure is not fatal */
		cte = kzalloc(sizeof(*cte), GFP_KERNEL);
		if (WARN_ON(!cte))
		break;

		INIT_LIST_HEAD(&cte->entry);
		list_add(&cte->entry, &dist->lpi_translation_cache);
		}
		}

		void vgic_lpi_translation_cache_destroy(struct kvm *kvm)
		{
		struct vgic_dist *dist = &kvm->arch.vgic;
		struct vgic_translation_cache_entry cte, tmp;

		list_for_each_entry_safe(cte, tmp,
		&dist->lpi_translation_cache, entry) {
		list_del(&cte->entry);
		kfree(cte);
		}
		}

		#define INITIAL_BASER_VALUE \
		(GIC_BASER_CACHEABILITY(GITS_BASER, INNER, RaWb) \| \
		GIC_BASER_CACHEABILITY(GITS_BASER, OUTER, SameAsInner) \| \
		@@ -1685,6 +1732,8 @@ static int vgic_its_create(struct kvm_device *dev, u32 type)
		kfree(its);
		return ret;
		}

		vgic_lpi_translation_cache_init(dev->kvm);
		}

		mutex_init(&its->its_lock);

+2 −0

Original line number	Diff line number	Diff line
		@@ -307,6 +307,8 @@ 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);
		void vgic_lpi_translation_cache_init(struct kvm *kvm);
		void vgic_lpi_translation_cache_destroy(struct kvm *kvm);

		bool vgic_supports_direct_msis(struct kvm *kvm);
		int vgic_v4_init(struct kvm *kvm);