[PATCH] riscv: boot: add zstd support

From: Jisheng Zhang
Date: Wed Nov 23 2022 - 10:13:01 EST


Support build the zstd compressed Image.zst. Similar as other
compressed formats, the Image.zst is not self-decompressing and
the bootloader still needs to handle decompression before
launching the kernel image.

Signed-off-by: Jisheng Zhang <jszhang@xxxxxxxxxx>
---
arch/riscv/boot/Makefile | 3 +++
1 file changed, 3 insertions(+)

diff --git a/arch/riscv/boot/Makefile b/arch/riscv/boot/Makefile
index d1a49adcb1d7..c72de7232abb 100644
--- a/arch/riscv/boot/Makefile
+++ b/arch/riscv/boot/Makefile
@@ -56,6 +56,9 @@ $(obj)/Image.lzma: $(obj)/Image FORCE
$(obj)/Image.lzo: $(obj)/Image FORCE
$(call if_changed,lzo)

+$(obj)/Image.zst: $(obj)/Image FORCE
+ $(call if_changed,zstd)
+
$(obj)/loader.bin: $(obj)/loader FORCE
$(call if_changed,objcopy)

--
2.37.2