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path: root/virt/kvm/arm/vgic/vgic-v3.c
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Diffstat (limited to 'virt/kvm/arm/vgic/vgic-v3.c')
-rw-r--r--virt/kvm/arm/vgic/vgic-v3.c49
1 files changed, 32 insertions, 17 deletions
diff --git a/virt/kvm/arm/vgic/vgic-v3.c b/virt/kvm/arm/vgic/vgic-v3.c
index 2a11fe89943a..ce4476a08f5b 100644
--- a/virt/kvm/arm/vgic/vgic-v3.c
+++ b/virt/kvm/arm/vgic/vgic-v3.c
@@ -419,6 +419,29 @@ int vgic_v3_save_pending_tables(struct kvm *kvm)
return 0;
}
+/**
+ * vgic_v3_rdist_overlap - check if a region overlaps with any
+ * existing redistributor region
+ *
+ * @kvm: kvm handle
+ * @base: base of the region
+ * @size: size of region
+ *
+ * Return: true if there is an overlap
+ */
+bool vgic_v3_rdist_overlap(struct kvm *kvm, gpa_t base, size_t size)
+{
+ struct vgic_dist *d = &kvm->arch.vgic;
+ struct vgic_redist_region *rdreg;
+
+ list_for_each_entry(rdreg, &d->rd_regions, list) {
+ if ((base + size > rdreg->base) &&
+ (base < rdreg->base + vgic_v3_rd_region_size(kvm, rdreg)))
+ return true;
+ }
+ return false;
+}
+
/*
* Check for overlapping regions and for regions crossing the end of memory
* for base addresses which have already been set.
@@ -426,31 +449,23 @@ int vgic_v3_save_pending_tables(struct kvm *kvm)
bool vgic_v3_check_base(struct kvm *kvm)
{
struct vgic_dist *d = &kvm->arch.vgic;
- gpa_t redist_size = KVM_VGIC_V3_REDIST_SIZE;
- struct vgic_redist_region *rdreg =
- list_first_entry(&d->rd_regions,
- struct vgic_redist_region, list);
-
- redist_size *= atomic_read(&kvm->online_vcpus);
+ struct vgic_redist_region *rdreg;
if (!IS_VGIC_ADDR_UNDEF(d->vgic_dist_base) &&
d->vgic_dist_base + KVM_VGIC_V3_DIST_SIZE < d->vgic_dist_base)
return false;
- if (rdreg && (rdreg->base + redist_size < rdreg->base))
- return false;
-
- /* Both base addresses must be set to check if they overlap */
- if (IS_VGIC_ADDR_UNDEF(d->vgic_dist_base) || !rdreg)
- return true;
-
- if (d->vgic_dist_base + KVM_VGIC_V3_DIST_SIZE <= rdreg->base)
- return true;
+ list_for_each_entry(rdreg, &d->rd_regions, list) {
+ if (rdreg->base + vgic_v3_rd_region_size(kvm, rdreg) <
+ rdreg->base)
+ return false;
+ }
- if (rdreg->base + redist_size <= d->vgic_dist_base)
+ if (IS_VGIC_ADDR_UNDEF(d->vgic_dist_base))
return true;
- return false;
+ return !vgic_v3_rdist_overlap(kvm, d->vgic_dist_base,
+ KVM_VGIC_V3_DIST_SIZE);
}
/**