[Buildroot] [PATCH v2 2/5] configs: qemu_riscv32_virt: Upgrade to 4.20 kernel

[Alistair Francis]

On Tue, Mar 19, 2019 at 8:20 AM Mark Corbin <mark.corbin at embecosm.com> wrote:
>
> Hello Alistair
>
> On 18/03/2019 21:02, Alistair Francis wrote:
> > Signed-off-by: Alistair Francis <alistair.francis at wdc.com>
> > ---
> >  configs/qemu_riscv32_virt_defconfig | 6 +++---
> >  1 file changed, 3 insertions(+), 3 deletions(-)
> >
> > diff --git a/configs/qemu_riscv32_virt_defconfig b/configs/qemu_riscv32_virt_defconfig
> > index fb37da6a89..6f9a61b11c 100644
> > --- a/configs/qemu_riscv32_virt_defconfig
> > +++ b/configs/qemu_riscv32_virt_defconfig
> > @@ -10,14 +10,14 @@ BR2_TARGET_GENERIC_GETTY_PORT="ttyS0"
> >  # Filesystem
> >  BR2_TARGET_ROOTFS_EXT2=y
> >
> > -# Linux headers same as kernel, a 4.15 series
> > -BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_4_15=y
> > +# Linux headers same as kernel, a 4.20 series
> > +BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_4_20=y
> >
> >  # Kernel
> >  BR2_LINUX_KERNEL=y
> >  BR2_LINUX_KERNEL_CUSTOM_GIT=y
> >  BR2_LINUX_KERNEL_CUSTOM_REPO_URL="https://github.com/riscv/riscv-linux.git"
> > -BR2_LINUX_KERNEL_CUSTOM_REPO_VERSION="fe92d7905c6ea0ebeabeb725b8040754ede7c220"
> > +BR2_LINUX_KERNEL_CUSTOM_REPO_VERSION="8fe28cb58bcb235034b64cbbb7550a8a43fd88be"
>
> I wasn't sure that the 4.20 kernel worked for riscv32 under qemu which
> is probably why it wasn't bumped from 4.15 in January when the
> qemu_riscv64_virt_defconfig kernel version was.
>
> How did you manage to test this? I've tried both qemu 2.12.0 and 3.1.0
> and neither version will boot the resulting kernel.

I just tested this again and here are my results. All running on QEMU
3.1.0 and using OpenSBI

With current master + my OpenSBI patches -> I can boot the 4.20
kernel, but it never gets to a login prompt.

With current master + my OpenSBI patches + defconfig update -> I can
boot the 4.20 kernel and I get to a login prompt.

I did some of my original tests with an updated defconfig but I
thought I tested without any changed. I'll send a patch to update the
defconfig.

Alistair

>
> Regards
>
> Mark
>
> --
> Mark Corbin
> Embecosm Ltd.
> https://www.embecosm.com
>