Re: [Qemu-arm] [PATCH 04/10] hw/sd: Add QOM bus which SD cards plug in to

[Peter Maydell]

On 20 December 2015 at 20:51, Peter Crosthwaite
<address@hidden> wrote:
> On Sun, Dec 20, 2015 at 9:10 AM, Peter Maydell <address@hidden> wrote:
>> For user-level back compat I think we need to retain "might have
>> an sdcard object with no block backend, and that means
>> 'no-card-present'". This is both for the user facing
>> monitor commands to manipulate the sd card, and also
>
> What are the user-facing monitor commands? I tried using "change" and
> "eject", but they don't seem to work for SD, due to the tray being
> closed. Has this ever worked in a way that is user manipulatable for
> SD or is it just to handle the case of unconditional SD card creation
> (with the card never hotplugging over the system lifetime)?

I investigated this, and it looks like we accidentally broke
'change' for SD cards in 2.5 (specifically in commit de2c6c05).
I think we should fix that regression, which in turn implies that
we still want to support the "sd card object with no block backend" case.

thanks
-- PMM