@@ -791,10 +791,6 @@ static int vgic_v3_insert_redist_region(struct kvm *kvm, uint32_t index,
size_t size = count * KVM_VGIC_V3_REDIST_SIZE;
int ret;
- /* single rdist region already set ?*/
- if (!count && !list_empty(rd_regions))
- return -EINVAL;
-
/* cross the end of memory ? */
if (base + size < base)
return -EINVAL;
@@ -805,11 +801,14 @@ static int vgic_v3_insert_redist_region(struct kvm *kvm, uint32_t index,
} else {
rdreg = list_last_entry(rd_regions,
struct vgic_redist_region, list);
- if (index != rdreg->index + 1)
- return -EINVAL;
- /* Cannot add an explicitly sized regions after legacy region */
- if (!rdreg->count)
+ if ((!count) != (!rdreg->count))
+ return -EINVAL; /* Mix REDIST and REDIST_REGION */
+
+ if (!count)
+ return -EEXIST;
+
+ if (index != rdreg->index + 1)
return -EINVAL;
}
KVM_DEV_ARM_VGIC_GRP_ADDR group doc says we should return -EEXIST in case the base address of the redist is already set. We currently return -EINVAL. However we need to return -EINVAL in case a legacy REDIST address is attempted to be set while REDIST_REGIONS were set. This case is discriminated by looking at the count field. Signed-off-by: Eric Auger <eric.auger@redhat.com> --- v1 -> v2: - simplify the check sequence --- arch/arm64/kvm/vgic/vgic-mmio-v3.c | 15 +++++++-------- 1 file changed, 7 insertions(+), 8 deletions(-)