Re: [PATCH] docs: Discourage users from using fwcfg

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On 9/7/20 3:57 PM, Martin Kletzander wrote:
On Mon, Sep 07, 2020 at 03:48:16PM +0200, Michal Privoznik wrote:
Even though this was brought up in upstream discussion [1] it
missed my patches: users should prefer <oemStrings/> over fwcfg.
The reason is that fwcfg is considered somewhat internal to QEMU
and it has limited number of slots and neither of these applies
to <oemStrings/>.

While I'm at it, I'm fixing the example too (because it contains
incorrect element name) and clarifying sysfs/ exposure.

1: https://www.redhat.com/archives/libvir-list/2020-May/msg00957.html

Reported-by: Laszlo Ersek <lersek@xxxxxxxxxx>
Signed-off-by: Michal Privoznik <mprivozn@xxxxxxxxxx>
---
docs/formatdomain.rst | 14 +++++++++-----
1 file changed, 9 insertions(+), 5 deletions(-)



It's nice that you say that, but people who would like to use fw_cfg for passing in a huge blob, which is saved in a file, will read this, go to <oemStrings/> and see that there is no way to pass a file as an input.  Should that be dealt
with somehow?  Or would that be discouraged as well?

Unfortunately, QEMU doesn't allow reading OEM strings from a file (at least quick glance over hw/smbios/smbios.c doesn't show any signs it's allowed).

Michal




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