Hi

How did you configure the BIOS flash device? I assume via the device tree? I haven't tested this in a while, but I seem to remember that if the BIOS SPI flash is not accessible Linux doesn't "detect" the device and doesn't create the MTD, i.e. it's not accessible from the BMC. This can be the case if the mux between BMC, PCH and BIOS SPI flash) is configured to connect the SPI flash to the BMC at the time the BMC boots. Or is there a way to make BMC's Linux "rescan" for SPI flash chips at runtime?

Thanks
Oskar.

On Tue, Dec 17, 2019 at 12:38 AM CS20 CTCchien <CTCCHIEN@nuvoton.com> wrote:

Hi Vijay,

 

You could build a host daemon and a ipmi library on BMC from phosphor-ipmi-flash

Here is the link I implement BIOS upgrade on my system

https://github.com/Nuvoton-Israel/openbmc/tree/runbmc/meta-phosphor/nuvoton-layer/recipes-phosphor/ipmi.

 

You need to prepare a BIOS image and a signature file for this BIOS

After you execute the command on host, ipmid in BMC will launch a script to upgrade BIOS.

 

For example,

sudo  ./burn_my_bmc --command update --interface ipmipci --image BIOS.img --sig BIOS.img.sig --type static

 

 

B.R.

Medad

From: Vijay Khemka <vijaykhemka@fb.com>
Sent: Tuesday, December 17, 2019 8:16 AM
To: OpenBMC Maillist <openbmc@lists.ozlabs.org>
Subject: Bios upgrade

 

Hi,

I am looking for bios upgrade from BMC. I looked at phosphor-ipmi-flash but

couldn’t figure out how to use this for bios upgrade. I checked few old mails

where oskar was asking about using user space application instead of kernel.

Can anyone please give steps to use any existing kernel driver or user space

Application for upgrading host firmware.

 

Regards

-Vijay

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