RISC-V: Use swiotlb on RV64 only

Only RV64 supports swiotlb. On RV32, it don't select the SWIOTLB.

Signed-off-by: Zong Li <zong@andestech.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>

diff --git a/arch/riscv/kernel/setup.c b/arch/riscv/kernel/setup.c
index b2d26d9..c946198 100644 (file)
--- a/arch/riscv/kernel/setup.c
+++ b/arch/riscv/kernel/setup.c
@@ -227,7 +227,10 @@ void __init setup_arch(char **cmdline_p)
        setup_bootmem();
        paging_init();
        unflatten_device_tree();
+
+#ifdef CONFIG_SWIOTLB
        swiotlb_init(1);
+#endif
 
 #ifdef CONFIG_SMP
        setup_smp();