diff --git a/hw/arm/smmuv3-internal.h b/hw/arm/smmuv3-internal.h
index 6de52bbf4d..bce161870f 100644
--- a/hw/arm/smmuv3-internal.h
+++ b/hw/arm/smmuv3-internal.h
@@ -56,6 +56,7 @@ REG32(IDR2,                0x8)
 REG32(IDR3,                0xc)
      FIELD(IDR3, HAD,         2, 1);
      FIELD(IDR3, RIL,        10, 1);
+     FIELD(IDR3, BBML,       11, 2);
 REG32(IDR4,                0x10)
 REG32(IDR5,                0x14)
      FIELD(IDR5, OAS,         0, 3);
diff --git a/hw/arm/smmuv3.c b/hw/arm/smmuv3.c
index 3a989b09cb..daa80e9c7b 100644
--- a/hw/arm/smmuv3.c
+++ b/hw/arm/smmuv3.c
@@ -259,6 +259,7 @@ static void smmuv3_init_regs(SMMUv3State *s)
 
     s->idr[3] = FIELD_DP32(s->idr[3], IDR3, RIL, 1);
     s->idr[3] = FIELD_DP32(s->idr[3], IDR3, HAD, 1);
+    s->idr[3] = FIELD_DP32(s->idr[3], IDR3, BBML, 2);
 
     /* 4K, 16K and 64K granule support */
     s->idr[5] = FIELD_DP32(s->idr[5], IDR5, GRAN4K, 1);