diff options
| -rw-r--r-- | virt/kvm/arm/vgic/vgic-its.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/virt/kvm/arm/vgic/vgic-its.c b/virt/kvm/arm/vgic/vgic-its.c index 6a715a6ec64e..e69ef7d27fde 100644 --- a/virt/kvm/arm/vgic/vgic-its.c +++ b/virt/kvm/arm/vgic/vgic-its.c @@ -1466,6 +1466,16 @@ static void vgic_mmio_write_its_ctlr(struct kvm *kvm, struct vgic_its *its, { mutex_lock(&its->cmd_lock); + /* + * It is UNPREDICTABLE to enable the ITS if any of the CBASER or + * device/collection BASER are invalid + */ + if (!its->enabled && (val & GITS_CTLR_ENABLE) && + (!(its->baser_device_table & GITS_BASER_VALID) || + !(its->baser_coll_table & GITS_BASER_VALID) || + !(its->cbaser & GITS_CBASER_VALID))) + goto out; + its->enabled = !!(val & GITS_CTLR_ENABLE); /* @@ -1474,6 +1484,7 @@ static void vgic_mmio_write_its_ctlr(struct kvm *kvm, struct vgic_its *its, */ vgic_its_process_commands(kvm, its); +out: mutex_unlock(&its->cmd_lock); } |