Re: [PATCH v5 2/6] hw/sd/sdcard: Allow user-instantiated eMMC

["Daniel P. Berrangé" <berrange@redhat.com>]

On Mon, Oct 27, 2025 at 01:23:56PM +0100, Philippe Mathieu-Daudé wrote:
> On 27/10/25 12:55, Daniel P. Berrangé wrote:
> > On Fri, Oct 17, 2025 at 02:03:54PM +0200, Jan Kiszka wrote:
> > > From: Jan Kiszka <jan.kiszka@siemens.com>
> > > 
> > > Enable user-instantiation so that PCI-attached eMMCs can be created for
> > > virt machines, for QA purposes for the eMMC model itself and for complex
> > > firmware/OS integrations using the upcoming RPMB partition support.
> > 
> > IIUC, the 'emmc' device wants an 'sd-bus' but this commit talks about
> > it being PCI-attached ?
> 
> Sigh, it should not, but it got introduced this way and we didn't
> have time / energy / good reason to rework the code, which currently
> just works.
> 
> SD / MMC cards -> plugged over external SD bus
> 
> embedded MMC cards -> no SD bus, directly mmio-mapped.
> 
> > 
> > Can you elaborate on / illustrate the usage example for an end user ?
> 
> Saving time by testing virtual hardware, without having to implement a
> real model.

Ok, more specifically, what are the suggested QEMU command line
args to make use of this with PCI ?


With regards,
Daniel
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