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[Bug 1895895] Re: Attaching SD-Card to specific SD-Bus Sabrelite (ARM)
From: |
Philippe Mathieu-Daudé |
Subject: |
[Bug 1895895] Re: Attaching SD-Card to specific SD-Bus Sabrelite (ARM) |
Date: |
Tue, 24 Nov 2020 10:44:49 -0000 |
Patch sent:
https://lists.gnu.org/archive/html/qemu-devel/2020-11/msg05942.html
** Changed in: qemu
Status: Confirmed => In Progress
** Changed in: qemu
Assignee: (unassigned) => Philippe Mathieu-Daudé (philmd)
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https://bugs.launchpad.net/bugs/1895895
Title:
Attaching SD-Card to specific SD-Bus Sabrelite (ARM)
Status in QEMU:
In Progress
Bug description:
Currently, I am looking for a method of attaching an sd-card to a
specific bus as opposed to defaulting to the first.
QEMU Version: 5.0.0
Specifically trying to use qemu-system-arm binary
Running an "info qtree" shows the output seen in the attached image. I have
attempted multiple different combinations of arguments to attempt to get the
sd-card to appear on the FOURTH sd-bus but no luck. The machine type being used
is Sabrelite. It should be noted that I was able to PATCH QEMU to achieve the
result I expected but I had hoped this functionality was already available and
did not require modification to QEMU itself.
For reference, this is the patch that was made to source to allow the card to
attach to a specific bus. After the change was made, an sd-card could be
attached to a bus with the following flags:
-drive file=sdcard.img,format=raw,id=mycard -device sd-
card,drive=mycard,bus=sd-bus.0
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);
If there is a way to attach an sd-card to the specific bus that does
NOT require this change, I'd appreciate it.
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