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KVM: arm64: vgic: Undo work in failed ITS restores

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Failed ITS restores should clean up all state restored until the
failure. There is some cleanup already present when failing to restore
some tables, but it's not complete. Add the missing cleanup.

Note that this changes the behavior in case of a failed restore of the
device tables.

	restore ioctl:
	1. restore collection tables
	2. restore device tables

With this commit, failures in 2. clean up everything created so far,
including state created by 1.

Reviewed-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Ricardo Koller <ricarkol@google.com>
Reviewed-by: Oliver Upton <oupton@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20220510001633.552496-5-ricarkol@google.com
This commit is contained in:
Ricardo Koller 2022-05-09 17:16:33 -07:00 committed by Marc Zyngier
parent a1ccfd6f6e
commit 8c5e74c90b
1 changed files with 13 additions and 2 deletions
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15
arch/arm64/kvm/vgic/vgic-its.c
View file

@ -2219,8 +2219,10 @@ static int vgic_its_restore_ite(struct vgic_its *its, u32 event_id,
vcpu = kvm_get_vcpu(kvm, collection->target_addr);
irq = vgic_add_lpi(kvm, lpi_id, vcpu);
if (IS_ERR(irq))
if (IS_ERR(irq)) {
its_free_ite(kvm, ite);
return PTR_ERR(irq);
}
ite->irq = irq;
return offset;
@ -2485,6 +2487,9 @@ static int vgic_its_restore_device_tables(struct vgic_its *its)
if (ret > 0)
ret = 0;
if (ret < 0)
vgic_its_free_device_list(its->dev->kvm, its);
return ret;
}
@ -2615,6 +2620,9 @@ static int vgic_its_restore_collection_table(struct vgic_its *its)
if (ret > 0)
return 0;
if (ret < 0)
vgic_its_free_collection_list(its->dev->kvm, its);
return ret;
}
@ -2646,7 +2654,10 @@ static int vgic_its_restore_tables_v0(struct vgic_its *its)
if (ret)
return ret;
return vgic_its_restore_device_tables(its);
ret = vgic_its_restore_device_tables(its);
if (ret)
vgic_its_free_collection_list(its->dev->kvm, its);
return ret;
}
static int vgic_its_commit_v0(struct vgic_its *its)