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KVM: arm64: vgic-its: Read config and pending bit in add_lpi()

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When creating the lpi we now ask the redistributor what is the state
of the LPI (priority, enabled, pending).

Signed-off-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Marc Zyngier <marc.zyngier@arm.com>
Reviewed-by: Christoffer Dall <cdall@linaro.org>
This commit is contained in:
Eric Auger 2017-05-04 11:36:32 +02:00 committed by Christoffer Dall
parent 44de9d6838
commit 06bd535954
1 changed files with 24 additions and 11 deletions
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35
virt/kvm/arm/vgic/vgic-its.c
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@ -36,6 +36,8 @@
static int vgic_its_save_tables_v0(struct vgic_its *its);
static int vgic_its_restore_tables_v0(struct vgic_its *its);
static int vgic_its_commit_v0(struct vgic_its *its);
static int update_lpi_config(struct kvm *kvm, struct vgic_irq *irq,
struct kvm_vcpu *filter_vcpu);
/*
* Creates a new (reference to a) struct vgic_irq for a given LPI.
@ -44,10 +46,12 @@ static int vgic_its_commit_v0(struct vgic_its *its);
* If this is a "new" LPI, we allocate and initialize a new struct vgic_irq.
* This function returns a pointer to the _unlocked_ structure.
*/
static struct vgic_irq *vgic_add_lpi(struct kvm *kvm, u32 intid)
static struct vgic_irq *vgic_add_lpi(struct kvm *kvm, u32 intid,
struct kvm_vcpu *vcpu)
{
struct vgic_dist *dist = &kvm->arch.vgic;
struct vgic_irq *irq = vgic_get_irq(kvm, NULL, intid), *oldirq;
int ret;
/* In this case there is no put, since we keep the reference. */
if (irq)
@ -64,6 +68,7 @@ static struct vgic_irq *vgic_add_lpi(struct kvm *kvm, u32 intid)
irq->config = VGIC_CONFIG_EDGE;
kref_init(&irq->refcount);
irq->intid = intid;
irq->target_vcpu = vcpu;
spin_lock(&dist->lpi_list_lock);
@ -95,6 +100,19 @@ static struct vgic_irq *vgic_add_lpi(struct kvm *kvm, u32 intid)
out_unlock:
spin_unlock(&dist->lpi_list_lock);
/*
* We "cache" the configuration table entries in our struct vgic_irq's.
* However we only have those structs for mapped IRQs, so we read in
* the respective config data from memory here upon mapping the LPI.
*/
ret = update_lpi_config(kvm, irq, NULL);
if (ret)
return ERR_PTR(ret);
ret = vgic_v3_lpi_sync_pending_status(kvm, irq);
if (ret)
return ERR_PTR(ret);
return irq;
}
@ -795,6 +813,7 @@ static int vgic_its_cmd_handle_mapi(struct kvm *kvm, struct vgic_its *its,
u32 event_id = its_cmd_get_id(its_cmd);
u32 coll_id = its_cmd_get_collection(its_cmd);
struct its_ite *ite;
struct kvm_vcpu *vcpu = NULL;
struct its_device *device;
struct its_collection *collection, *new_coll = NULL;
int lpi_nr;
@ -840,7 +859,10 @@ static int vgic_its_cmd_handle_mapi(struct kvm *kvm, struct vgic_its *its,
ite->collection = collection;
ite->lpi = lpi_nr;
irq = vgic_add_lpi(kvm, lpi_nr);
if (its_is_collection_mapped(collection))
vcpu = kvm_get_vcpu(kvm, collection->target_addr);
irq = vgic_add_lpi(kvm, lpi_nr, vcpu);
if (IS_ERR(irq)) {
if (new_coll)
vgic_its_free_collection(its, coll_id);
@ -849,15 +871,6 @@ static int vgic_its_cmd_handle_mapi(struct kvm *kvm, struct vgic_its *its,
}
ite->irq = irq;
update_affinity_ite(kvm, ite);
/*
* We "cache" the configuration table entries in out struct vgic_irq's.
* However we only have those structs for mapped IRQs, so we read in
* the respective config data from memory here upon mapping the LPI.
*/
update_lpi_config(kvm, ite->irq, NULL);
return 0;
}