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authorEric Auger <eric.auger@redhat.com>2019-12-13 10:42:37 +0100
committerMarc Zyngier <maz@kernel.org>2020-01-19 16:05:11 +0000
commit8c58be34494b7f1b2adb446e2d8beeb90e5de65b (patch)
tree8cd692b2af40a9c26d69ec7d67b00e42800a8519 /virt
parentb6ae256afd32f96bec0117175b329d0dd617655e (diff)
downloadlinux-8c58be34494b7f1b2adb446e2d8beeb90e5de65b.tar.bz2
KVM: arm/arm64: vgic-its: Fix restoration of unmapped collections
Saving/restoring an unmapped collection is a valid scenario. For example this happens if a MAPTI command was sent, featuring an unmapped collection. At the moment the CTE fails to be restored. Only compare against the number of online vcpus if the rdist base is set. Fixes: ea1ad53e1e31a ("KVM: arm64: vgic-its: Collection table save/restore") Signed-off-by: Eric Auger <eric.auger@redhat.com> Signed-off-by: Marc Zyngier <maz@kernel.org> Reviewed-by: Zenghui Yu <yuzenghui@huawei.com> Link: https://lore.kernel.org/r/20191213094237.19627-1-eric.auger@redhat.com
Diffstat (limited to 'virt')
-rw-r--r--virt/kvm/arm/vgic/vgic-its.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/virt/kvm/arm/vgic/vgic-its.c b/virt/kvm/arm/vgic/vgic-its.c
index 98c7360d9fb7..17920d1b350a 100644
--- a/virt/kvm/arm/vgic/vgic-its.c
+++ b/virt/kvm/arm/vgic/vgic-its.c
@@ -2475,7 +2475,8 @@ static int vgic_its_restore_cte(struct vgic_its *its, gpa_t gpa, int esz)
target_addr = (u32)(val >> KVM_ITS_CTE_RDBASE_SHIFT);
coll_id = val & KVM_ITS_CTE_ICID_MASK;
- if (target_addr >= atomic_read(&kvm->online_vcpus))
+ if (target_addr != COLLECTION_NOT_MAPPED &&
+ target_addr >= atomic_read(&kvm->online_vcpus))
return -EINVAL;
collection = find_collection(its, coll_id);