diff --git a/cc/config/riscv64_device.go b/cc/config/riscv64_device.go
index 40919c0..e048622 100644
--- a/cc/config/riscv64_device.go
+++ b/cc/config/riscv64_device.go
@@ -26,14 +26,14 @@
 		// Help catch common 32/64-bit errors.
 		"-Werror=implicit-function-declaration",
 		"-fno-emulated-tls",
-		"-march=rv64gc_zba_zbb_zbs",
+		"-march=rv64gcv_zba_zbb_zbs",
 	}
 
 	riscv64ArchVariantCflags = map[string][]string{}
 
 	riscv64Ldflags = []string{
 		"-Wl,--hash-style=gnu",
-		"-march=rv64gc_zba_zbb_zbs",
+		"-march=rv64gcv_zba_zbb_zbs",
 	}
 
 	riscv64Lldflags = append(riscv64Ldflags,
diff --git a/filesystem/avb_add_hash_footer.go b/filesystem/avb_add_hash_footer.go
index f3fecd0..dabbc46 100644
--- a/filesystem/avb_add_hash_footer.go
+++ b/filesystem/avb_add_hash_footer.go
@@ -68,6 +68,9 @@
 	// List of properties to add to the footer
 	Props []avbProp
 
+	// The index used to prevent rollback of the image on device.
+	Rollback_index *int64
+
 	// Include descriptors from images
 	Include_descriptors_from_images []string `android:"path,arch_variant"`
 }
@@ -128,6 +131,14 @@
 		addAvbProp(ctx, cmd, prop)
 	}
 
+	if a.properties.Rollback_index != nil {
+		rollbackIndex := proptools.Int(a.properties.Rollback_index)
+		if rollbackIndex < 0 {
+			ctx.PropertyErrorf("rollback_index", "Rollback index must be non-negative")
+		}
+		cmd.Flag(fmt.Sprintf(" --rollback_index %x", rollbackIndex))
+	}
+
 	cmd.FlagWithOutput("--image ", a.output)
 
 	builder.Build("avbAddHashFooter", fmt.Sprintf("avbAddHashFooter %s", ctx.ModuleName()))