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smmu: Clear SMMUPciBus pointer cache when system reset 

s->smmu_pcibus_by_bus_num is a SMMUPciBus pointer cache indexed
by bus number, bus number may not always be a fixed value,
i.e., guest reboot to different kernel which set bus number with
different algorithm.

This could lead to smmu_iommu_mr() providing the wrong iommu MR.

Suggested-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
Message-Id: <20240125073706.339369-3-zhenzhong.duan@intel.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Tested-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
master
Zhenzhong Duan 2024-01-25 15:37:06 +08:00 committed by Michael S. Tsirkin
parent 9a457383ce
commit 8a6b3f4dc9
1 changed files with 2 additions and 0 deletions
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2
hw/arm/smmu-common.c
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@ -675,6 +675,8 @@ static void smmu_base_reset_hold(Object *obj)
{
SMMUState *s = ARM_SMMU(obj);
memset(s->smmu_pcibus_by_bus_num, 0, sizeof(s->smmu_pcibus_by_bus_num));
g_hash_table_remove_all(s->configs);
g_hash_table_remove_all(s->iotlb);
}