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authorAndre Przywara <andre.przywara@arm.com>2016-04-13 11:49:07 +0100
committerChristoffer Dall <christoffer.dall@linaro.org>2016-05-20 15:39:40 +0200
commitc8eb3f6b9bc31abc0ab3230737fde1639c8b1ea6 (patch)
tree4b599703a3e533993f3c1c49eeda650d74aacf92 /virt
parenta7e33ad9b25552b75a2523cc598db8bcd218ede5 (diff)
downloadlinux-stericsson-c8eb3f6b9bc31abc0ab3230737fde1639c8b1ea6.tar.gz
KVM: arm/arm64: vgic: Remove irq_phys_map from interface
Now that the virtual arch timer does not care about the irq_phys_map anymore, let's rework kvm_vgic_map_phys_irq() to return an error value instead. Any reference to that mapping can later be done by passing the correct combination of VCPU and virtual IRQ number. This makes the irq_phys_map handling completely private to the VGIC code. Signed-off-by: Andre Przywara <andre.przywara@arm.com> Reviewed-by: Eric Auger <eric.auger@linaro.org> Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org>
Diffstat (limited to 'virt')
-rw-r--r--virt/kvm/arm/arch_timer.c7
-rw-r--r--virt/kvm/arm/vgic.c15
2 files changed, 8 insertions, 14 deletions
diff --git a/virt/kvm/arm/arch_timer.c b/virt/kvm/arm/arch_timer.c
index 458d4d8ce795..3232105e6afd 100644
--- a/virt/kvm/arm/arch_timer.c
+++ b/virt/kvm/arm/arch_timer.c
@@ -333,7 +333,6 @@ int kvm_timer_vcpu_reset(struct kvm_vcpu *vcpu,
const struct kvm_irq_level *irq)
{
struct arch_timer_cpu *timer = &vcpu->arch.timer_cpu;
- struct irq_phys_map *map;
struct irq_desc *desc;
struct irq_data *data;
int phys_irq;
@@ -374,11 +373,7 @@ int kvm_timer_vcpu_reset(struct kvm_vcpu *vcpu,
* Tell the VGIC that the virtual interrupt is tied to a
* physical interrupt. We do that once per VCPU.
*/
- map = kvm_vgic_map_phys_irq(vcpu, irq->irq, phys_irq);
- if (WARN_ON(IS_ERR(map)))
- return PTR_ERR(map);
-
- return 0;
+ return kvm_vgic_map_phys_irq(vcpu, irq->irq, phys_irq);
}
void kvm_timer_vcpu_init(struct kvm_vcpu *vcpu)
diff --git a/virt/kvm/arm/vgic.c b/virt/kvm/arm/vgic.c
index a7e496abfca2..91d42a8a5f72 100644
--- a/virt/kvm/arm/vgic.c
+++ b/virt/kvm/arm/vgic.c
@@ -1719,21 +1719,20 @@ static struct list_head *vgic_get_irq_phys_map_list(struct kvm_vcpu *vcpu,
* the physical interrupt represented by @phys_irq. This mapping can be
* established multiple times as long as the parameters are the same.
*
- * Returns a valid pointer on success, and an error pointer otherwise
+ * Returns 0 on success or an error value otherwise.
*/
-struct irq_phys_map *kvm_vgic_map_phys_irq(struct kvm_vcpu *vcpu,
- int virt_irq, int phys_irq)
+int kvm_vgic_map_phys_irq(struct kvm_vcpu *vcpu, int virt_irq, int phys_irq)
{
struct vgic_dist *dist = &vcpu->kvm->arch.vgic;
struct list_head *root = vgic_get_irq_phys_map_list(vcpu, virt_irq);
struct irq_phys_map *map;
struct irq_phys_map_entry *entry;
-
+ int ret = 0;
/* Create a new mapping */
entry = kzalloc(sizeof(*entry), GFP_KERNEL);
if (!entry)
- return ERR_PTR(-ENOMEM);
+ return -ENOMEM;
spin_lock(&dist->irq_phys_map_lock);
@@ -1742,7 +1741,7 @@ struct irq_phys_map *kvm_vgic_map_phys_irq(struct kvm_vcpu *vcpu,
if (map) {
/* Make sure this mapping matches */
if (map->phys_irq != phys_irq)
- map = ERR_PTR(-EINVAL);
+ ret = -EINVAL;
/* Found an existing, valid mapping */
goto out;
@@ -1758,9 +1757,9 @@ out:
spin_unlock(&dist->irq_phys_map_lock);
/* If we've found a hit in the existing list, free the useless
* entry */
- if (IS_ERR(map) || map != &entry->map)
+ if (ret || map != &entry->map)
kfree(entry);
- return map;
+ return ret;
}
static struct irq_phys_map *vgic_irq_map_search(struct kvm_vcpu *vcpu,