> First, multiple QEMU instances cannot access nvme:// devices sharing the
> same IOMMU group. I don't think this will ever be possible because it
> opens a backdoor around process memory isolation.
>
> However, a single QEMU (or qemu-storage-daemon) instance should be able
> to access multiple
On Tue, Aug 23, 2022 at 10:36:00PM +, Martin Oliveira wrote:
> Hello,
>
> I'm trying to use the QEMU NVMe userspace driver and I'm hitting an error
> when trying to use more than one device from an IOMMU group:
>
> Failed to open VFIO group file: /dev/vfio/39: Device or resource busy
>
> On Aug 24, 2022, at 4:36 PM, Martin Oliveira
> wrote:
>-drive file=nvme://:26:00.0,if=none,id=drive0,format=raw
>-device virtio-blk,drive=drive0,id=virtio0,serial=nvme0
Small typo above, I missed the /1, it should read:
-drive
Hello,
I'm trying to use the QEMU NVMe userspace driver and I'm hitting an error when
trying to use more than one device from an IOMMU group:
Failed to open VFIO group file: /dev/vfio/39: Device or resource busy
If devices belong to different IOMMU groups, then it works as expected.
For
