Re: [PATCH] RISC-V: Build flat and compressed kernel images

From: Palmer Dabbelt
Date: Wed Nov 21 2018 - 11:28:13 EST


On Tue, 20 Nov 2018 21:06:18 PST (-0800), bmeng.cn@xxxxxxxxx wrote:
On Mon, Nov 12, 2018 at 1:55 PM Anup Patel <anup@xxxxxxxxxxxxxx> wrote:

This patch extends Linux RISC-V build system to build and install:
Image - Flat uncompressed kernel image
Image.gz - Flat and GZip compressed kernel image

Quiet a few bootloaders (such as Uboot, UEFI, etc) are capable of

nits: U-Boot

booting flat and compressed kernel images. In case of Uboot, booting

nits: U-Boot

Thanks for the review. The PR has already been tagged, but it's not scheduled to be sent out until later today. I generally try to avoid rewriting the tags unless there's something major that's wrong, so unless you feel very strongly about this then I think I'll let it stand.

Let me know if this is a big deal for you, I can rewrite things.

Image or Image.gz is achieved using bootm command.

The flat and uncompressed kernel image (i.e. Image) is very useful
in pre-silicon developent and testing because we can create back-door
HEX files for RAM on FPGAs from Image.

Signed-off-by: Anup Patel <anup@xxxxxxxxxxxxxx>
---
arch/riscv/Makefile | 15 ++++++++-
arch/riscv/boot/.gitignore | 2 ++
arch/riscv/boot/Makefile | 33 ++++++++++++++++++
arch/riscv/boot/install.sh | 60 +++++++++++++++++++++++++++++++++
arch/riscv/kernel/head.S | 10 ++++++
arch/riscv/kernel/vmlinux.lds.S | 2 +-
6 files changed, 120 insertions(+), 2 deletions(-)
create mode 100644 arch/riscv/boot/.gitignore
create mode 100644 arch/riscv/boot/Makefile
create mode 100644 arch/riscv/boot/install.sh


Reviewed-by: Bin Meng <bmeng.cn@xxxxxxxxx>

Tested with U-Boot s-mode on QEMU virt, using bootm to boot the kernel
Tested-by: Bin Meng <bmeng.cn@xxxxxxxxx>

I also won't include the tags unless I rewrite the tags.

Thanks for the review!