hw/arm/smmuv3: Fix device reset

We currently miss a bunch of register resets in the device reset
function. This sometimes prevents the guest from rebooting after
a system_reset (with virtio-blk-pci). For instance, we may get
the following errors:

invalid STE
smmuv3-iommu-memory-region-0-0 translation failed for iova=0x13a9d2000(SMMU_EVT_C_BAD_STE)
Invalid read at addr 0x13A9D2000, size 2, region '(null)', reason: rejected
invalid STE
smmuv3-iommu-memory-region-0-0 translation failed for iova=0x13a9d2000(SMMU_EVT_C_BAD_STE)
Invalid write at addr 0x13A9D2000, size 2, region '(null)', reason: rejected
invalid STE

Signed-off-by: Eric Auger <eric.auger@redhat.com>
Message-id: 20220202111602.627429-1-eric.auger@redhat.com
Fixes: 10a83cb ("hw/arm/smmuv3: Skeleton")
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

hw/arm/smmuv3.c

@@ -278,6 +278,12 @@ static void smmuv3_init_regs(SMMUv3State *s)
     s->features = 0;
     s->sid_split = 0;
     s->aidr = 0x1;
+    s->cr[0] = 0;
+    s->cr0ack = 0;
+    s->irq_ctrl = 0;
+    s->gerror = 0;
+    s->gerrorn = 0;
+    s->statusr = 0;
 }
 
 static int smmu_get_ste(SMMUv3State *s, dma_addr_t addr, STE *buf,