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virtio-iommu: Use recursive lock to avoid deadlock

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When switching address space with mutex lock hold, mapping will be
replayed for assigned device. This will trigger relock deadlock.

Also release the mutex resource in unrealize routine.

Signed-off-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
Message-Id: <20220613061010.2674054-3-zhenzhong.duan@intel.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Zhenzhong Duan 2022-06-13 14:10:09 +08:00 • committed by Michael S. Tsirkin
parent 90519b9053
commit 08f2030a2e
2 changed files with 12 additions and 10 deletions
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2
include/hw/virtio/virtio-iommu.h
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@ -58,7 +58,7 @@ struct VirtIOIOMMU {
ReservedRegion *reserved_regions;
uint32_t nb_reserved_regions;
GTree *domains;
QemuMutex mutex;
QemuRecMutex mutex;
GTree *endpoints;
bool boot_bypass;
};