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Re: [PATCH v2 9/9] docs: aspeed: Add fby35 multi-SoC machine section
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From: |
Joel Stanley |
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Subject: |
Re: [PATCH v2 9/9] docs: aspeed: Add fby35 multi-SoC machine section |
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Date: |
Wed, 6 Jul 2022 08:21:12 +0000 |
On Tue, 5 Jul 2022 at 19:14, Peter Delevoryas <peter@pjd.dev> wrote:
>
> Signed-off-by: Peter Delevoryas <peter@pjd.dev>
Reviewed-by: Joel Stanley <joel@jms.id.au>
> ---
> docs/system/arm/aspeed.rst | 48 ++++++++++++++++++++++++++++++++++++++
> 1 file changed, 48 insertions(+)
>
> diff --git a/docs/system/arm/aspeed.rst b/docs/system/arm/aspeed.rst
> index 5d0a7865d3..b233191b67 100644
> --- a/docs/system/arm/aspeed.rst
> +++ b/docs/system/arm/aspeed.rst
> @@ -136,6 +136,54 @@ AST1030 SoC based machines :
>
> - ``ast1030-evb`` Aspeed AST1030 Evaluation board (Cortex-M4F)
>
> +Facebook Yosemite v3.5 Platform and CraterLake Server (``fby35``)
> +==================================================================
> +
> +Facebook has a series of multi-node compute server designs named
> +Yosemite. The most recent version released was
> +`Yosemite v3
> <https://www.opencompute.org/documents/ocp-yosemite-v3-platform-design-specification-1v16-pdf>`.
> +
> +Yosemite v3.5 is an iteration on this design, and is very similar: there's a
> +baseboard with a BMC, and 4 server slots. The new server board design termed
> +"CraterLake" includes a Bridge IC (BIC), with room for expansion boards to
> +include various compute accelerators (video, inferencing, etc). At the
> moment,
> +only the first server slot's BIC is included.
> +
> +Yosemite v3.5 is itself a sled which fits into a 40U chassis, and 3 sleds
> +can be fit into a chassis. See `here
> <https://www.opencompute.org/products/423/wiwynn-yosemite-v3-server>`
> +for an example.
> +
> +In this generation, the BMC is an AST2600 and each BIC is an AST1030. The BMC
> +runs `OpenBMC <https://github.com/facebook/openbmc>`, and the BIC runs
> +`OpenBIC <https://github.com/facebook/openbic>`.
> +
> +Firmware images can be retrieved from the Github releases or built from the
> +source code, see the README's for instructions on that. This image uses the
> +"fby35" machine recipe from OpenBMC, and the "yv35-cl" target from OpenBIC.
> +Some reference images can also be found here:
> +
> +.. code-block:: bash
> +
> + $ wget
> https://github.com/facebook/openbmc/releases/download/openbmc-e2294ff5d31d/fby35.mtd
> + $ wget
> https://github.com/peterdelevoryas/OpenBIC/releases/download/oby35-cl-2022.13.01/Y35BCL.elf
> +
> +Since this machine has multiple SoC's, each with their own serial console,
> the
> +recommended way to run it is to allocate a pseudoterminal for each serial
> +console and let the monitor use stdio. Also, starting in a paused state is
> +useful because it allows you to attach to the pseudoterminals before the boot
> +process starts.
> +
> +.. code-block:: bash
> +
> + $ qemu-system-arm -machine fby35 \
> + -drive file=fby35.mtd,format=raw,if=mtd \
> + -device loader,file=Y35BCL.elf,addr=0,cpu-num=2 \
I came across a quirk of the qemu commandline when testing.
-drive knows how to expand ~ in a path, but -device loader does not.
Something for someone to look into on a rainy day!
eg:
$ build/qemu-system-arm -M fby35 -drive
file=~/tmp/fby35.mtd,format=raw,if=mtd -device
loader,file=~/tmp/Y35BCL.elf,addr=0,cpu-num=2 -serial pty -serial pty
-serial mon:stdio -display none -S
char device redirected to /dev/pts/3 (label serial0)
char device redirected to /dev/pts/5 (label serial1)
qemu-system-arm: warning: Aspeed iBT has no chardev backend
~/tmp/Y35BCL.elf: No such file or directory
qemu-system-arm: -device
loader,file=~/tmp/Y35BCL.elf,addr=0,cpu-num=2: Cannot load specified
image ~/tmp/Y35BCL.elf
loader uses open(2) in load_elf_ram_sym.
The call stack for -drive looks like this (using a bad path to make it
easier to identify what's going on):
#0 __libc_open64 (file=file@entry=0xaaaaac009250
"/home/joel/tmp/fby35.mtda", oflag=oflag@entry=524288) at
../sysdeps/unix/sysv/linux/open64.c:37
#1 0x0000aaaaab3b18bc in open64 (__oflag=524288,
__path=0xaaaaac009250 "/home/joel/tmp/fby35.mtda") at
/usr/include/aarch64-linux-gnu/bits/fcntl2.h:59
#2 qemu_open_cloexec (mode=0, flags=0, name=0xaaaaac009250
"/home/joel/tmp/fby35.mtda") at ../util/osdep.c:286
#3 qemu_open_internal (name=name@entry=0xaaaaac009250
"/home/joel/tmp/fby35.mtda", flags=flags@entry=0, mode=mode@entry=0,
errp=errp@entry=0xffffffffeb70) at ../util/osdep.c:330
#4 0x0000aaaaab3b1f30 in qemu_open (name=name@entry=0xaaaaac009250
"/home/joel/tmp/fby35.mtda", flags=flags@entry=0,
errp=errp@entry=0xffffffffeb70) at ../util/osdep.c:360
#5 0x0000aaaaab30d9d8 in raw_open_common (bs=0xaaaaac002c40,
options=<optimized out>, bdrv_flags=155650, open_flags=<optimized
out>, device=<optimized out>, errp=0xffffffffeb70)
at ../block/file-posix.c:680
#6 0x0000aaaaab2a53d0 in bdrv_open_driver
(bs=bs@entry=0xaaaaac002c40, drv=drv@entry=0xaaaaabc13250 <bdrv_file>,
node_name=<optimized out>, options=options@entry=0xaaaaac008230,
open_flags=open_flags@entry=155650,
errp=errp@entry=0xffffffffec18) at ../block.c:1625
#7 0x0000aaaaab2a9454 in bdrv_open_common (errp=0xffffffffec18,
options=0xaaaaac008230, file=0x0, bs=0xaaaaac002c40) at
../block.c:1922
#8 bdrv_open_inherit (filename=<optimized out>,
filename@entry=0xaaaaabff9cd0 "/home/joel/tmp/fby35.mtda",
reference=reference@entry=0x0, options=0xaaaaac008230,
flags=<optimized out>,
flags@entry=0, parent=parent@entry=0xaaaaabffb580,
child_class=child_class@entry=0xaaaaab864498 <child_of_bds>,
child_role=child_role@entry=19, errp=errp@entry=0xffffffffed48)
at ../block.c:3991
#9 0x0000aaaaab2aa35c in bdrv_open_child_bs
(filename=filename@entry=0xaaaaabff9cd0 "/home/joel/tmp/fby35.mtda",
options=options@entry=0xaaaaac000a50,
bdref_key=bdref_key@entry=0xaaaaab573010 "file",
parent=parent@entry=0xaaaaabffb580,
child_class=child_class@entry=0xaaaaab864498 <child_of_bds>,
child_role=child_role@entry=19,
allow_none=allow_none@entry=true, errp=errp@entry=0xffffffffed48)
at ../block.c:3624
#10 0x0000aaaaab2a98e4 in bdrv_open_inherit
(filename=filename@entry=0xaaaaabff9cd0 "/home/joel/tmp/fby35.mtda",
reference=reference@entry=0x0, options=0xaaaaac000a50,
options@entry=0xaaaaabff8b70, flags=<optimized out>,
parent=parent@entry=0x0, child_class=child_class@entry=0x0,
child_role=child_role@entry=0,
errp=errp@entry=0xaaaaabc62368 <error_fatal>) at ../block.c:3938
#11 0x0000aaaaab2aa758 in bdrv_open
(filename=filename@entry=0xaaaaabff9cd0 "/home/joel/tmp/fby35.mtda",
reference=reference@entry=0x0, options=options@entry=0xaaaaabff8b70,
flags=<optimized out>, errp=errp@entry=0xaaaaabc62368
<error_fatal>) at ../block.c:4086
#12 0x0000aaaaab2c59c8 in blk_new_open
(filename=filename@entry=0xaaaaabff9cd0 "/home/joel/tmp/fby35.mtda",
reference=reference@entry=0x0, options=options@entry=0xaaaaabff8b70,
flags=<optimized out>, errp=errp@entry=0xaaaaabc62368
<error_fatal>) at ../block/block-backend.c:454
#13 0x0000aaaaab2956c8 in blockdev_init
(file=file@entry=0xaaaaabff9cd0 "/home/joel/tmp/fby35.mtda",
bs_opts=bs_opts@entry=0xaaaaabff8b70, errp=errp@entry=0xaaaaabc62368
<error_fatal>)
at ../blockdev.c:592
#14 0x0000aaaaab296884 in drive_new (all_opts=0xaaaaabd1a3b0,
block_default_type=<optimized out>, errp=0xaaaaabc62368 <error_fatal>)
at ../blockdev.c:981
#15 0x0000aaaaaafea1e8 in drive_init_func (opaque=<optimized out>,
opts=<optimized out>, errp=<optimized out>) at ../softmmu/vl.c:648
#16 0x0000aaaaab3c0a74 in qemu_opts_foreach (list=<optimized out>,
func=func@entry=0xaaaaaafea1d0 <drive_init_func>,
opaque=opaque@entry=0xaaaaabf3eb58,
errp=errp@entry=0xaaaaabc62368 <error_fatal>) at ../util/qemu-option.c:1135
#17 0x0000aaaaaafee9d8 in configure_blockdev (bdo_queue=0xaaaaabb866c0
<bdo_queue>, snapshot=0, machine_class=0xaaaaabf3eab0) at
../softmmu/vl.c:707
#18 qemu_create_early_backends () at ../softmmu/vl.c:1882
#19 qemu_init (argc=<optimized out>, argv=0xfffffffff358,
envp=envp@entry=0x0) at ../softmmu/vl.c:3502
#20 0x0000aaaaaadb4300 in qemu_main (envp=0x0, argv=<optimized out>,
argc=<optimized out>) at ../softmmu/main.c:35
#21 main (argc=<optimized out>, argv=<optimized out>) at ../softmmu/main.c:45
and that was where I lost interest.
> + -serial pty -serial pty -serial mon:stdio \
> + -display none -S
> + $ screen /dev/tty0 # In a separate TMUX pane, terminal window, etc.
> + $ screen /dev/tty1
> + $ (qemu) c # Start the boot process once screen is setup.
> +
> Supported devices
> -----------------
>
> --
> 2.37.0
>