On Thu, 17 Sep 2020 at 19:21, David Aghaian <david.agha...@panasonic.aero> wrote: > Having a real difficult time determining whether or not I can use qemu (arm) > with the Sabrelite machine type to be able to assign an sd-card to one of the > 4 available sd-bus slots. Currently, no matter what combination of arguments > I provide, it will always fall on the first bus (see screenshot).
> Is there any way with QEMU to attach the card specifically to the last sd-bus > slot? It should be noted I was able to achieve the expected behavior after > patching QEMU itself with the following change but I’d prefer to not have to > modify the tool itself. This ought to work, but I think there is a bug in the QEMU model of this board which means it does not. > diff qemu-5.1.0.orig/hw/sd/sdhci.c qemu-5.1.0/hw/sd/sdhci.c > 1311a1312,1314 > > static int index=0; > > char name[64]; > > sprintf(name, "sd-bus.%d", index++); > 1313c1316 > < TYPE_SDHCI_BUS, DEVICE(s), "sd-bus"); > --- > > TYPE_SDHCI_BUS, DEVICE(s), name); Thanks for the suggested patch -- this was a big clue about what the problem was. sdhci.c isn't really the best place for this to be done -- this is the model of the device itself, and the name of the bus as part of the device should be 'sd-bus'. The right place to fix the bug, I think, is in the hw/arm/fsl-imx*.c files, which are the implementation of the SoC object. There we should be creating aliases on the SoC for the various SD buses (there's an example of this in hw/arm/xlnx-zynqmp.c), and the aliases can all have different names so they're usable from the command line. thanks -- PMM
