Re: [PATCH v1 2/2] firmware: dmi_scan: Pass dmi_entry_point to kexec'ed kernel

[Jean Delvare]

On Mon, 20 Jan 2020 10:04:04 -0600, Eric W. Biederman wrote:
> Second.  I looked at your test results and they don't directly make
> sense.  dmidecode bypasses the kernel completely or it did last time
> I looked so I don't know why you would be using that to test if
> something in the kernel is working.

That must have been long ago. A recent version of dmidecode (>= 3.0)
running on a recent kernel
(>= d7f96f97c4031fa4ffdb7801f9aae23e96170a6f, v4.2) will read the DMI
data from /sys/firmware/dmi/tables, so it is very much relying on the
kernel doing the right thing. If not, it will still try to fallback to
reading from /dev/mem directly on certain architectures. You can force
that old method with --no-sysfs.

Hope that helps,
-- 
Jean Delvare
SUSE L3 Support