Re: [BUG] issues with new bootflow, uefi and virtio

["Vincent Stehlé" <vincent.stehle@arm.com>]

On Thu, Apr 06, 2023 at 06:38:16AM +1200, Simon Glass wrote:
(virtio device number 31 vs. blk index 0)
> This is strange. Can you try 'dm uclass' to see the sequence number
> for the virtio device? I would expect it to be 0, but I might not
> fully understand virtio.

Hi Simon,

Thank you for looking into this. Here is the `dm uclass' extract corresponding
to virtio on this Qemu system:

  uclass 126: virtio
  0   * virtio_mmio@a000000 @ 7ee977d0, seq 0
  1   * virtio_mmio@a000200 @ 7ee97870, seq 1
  2   * virtio_mmio@a000400 @ 7ee97910, seq 2
  3   * virtio_mmio@a000600 @ 7ee979b0, seq 3
  4   * virtio_mmio@a000800 @ 7ee97a50, seq 4
  5   * virtio_mmio@a000a00 @ 7ee97af0, seq 5
  6   * virtio_mmio@a000c00 @ 7ee97b90, seq 6
  7   * virtio_mmio@a000e00 @ 7ee97c30, seq 7
  8   * virtio_mmio@a001000 @ 7ee97cd0, seq 8
  9   * virtio_mmio@a001200 @ 7ee97d70, seq 9
  10  * virtio_mmio@a001400 @ 7ee97e10, seq 10
  11  * virtio_mmio@a001600 @ 7ee97eb0, seq 11
  12  * virtio_mmio@a001800 @ 7ee97f50, seq 12
  13  * virtio_mmio@a001a00 @ 7ee97ff0, seq 13
  14  * virtio_mmio@a001c00 @ 7ee98090, seq 14
  15  * virtio_mmio@a001e00 @ 7ee98130, seq 15
  16  * virtio_mmio@a002000 @ 7ee981d0, seq 16
  17  * virtio_mmio@a002200 @ 7ee98270, seq 17
  18  * virtio_mmio@a002400 @ 7ee98310, seq 18
  19  * virtio_mmio@a002600 @ 7ee983b0, seq 19
  20  * virtio_mmio@a002800 @ 7ee98450, seq 20
  21  * virtio_mmio@a002a00 @ 7ee984f0, seq 21
  22  * virtio_mmio@a002c00 @ 7ee98590, seq 22
  23  * virtio_mmio@a002e00 @ 7ee98630, seq 23
  24  * virtio_mmio@a003000 @ 7ee986d0, seq 24
  25  * virtio_mmio@a003200 @ 7ee98770, seq 25
  26  * virtio_mmio@a003400 @ 7ee98810, seq 26
  27  * virtio_mmio@a003600 @ 7ee988b0, seq 27
  28  * virtio_mmio@a003800 @ 7ee98950, seq 28
  29  * virtio_mmio@a003a00 @ 7ee989f0, seq 29
  30  * virtio_mmio@a003c00 @ 7ee98a90, seq 30
  31  * virtio_mmio@a003e00 @ 7ee98b30, seq 31

(issue with multiple virtio devices)
> Please also see this:
> 
> https://patchwork.ozlabs.org/project/uboot/patch/20230402140231.v7.3.Ifa423a8f295b3c11e50821222b0db1e869d0c051@changeid/
> 
> (or the whole series)

Thank you for this patch!

When combined with the patch from Mathew[1], it does indeed repair the case of
efi boot with two virtio disks, specifically when the first virtio disk is the
one we want to boot from.
FWIW, the system will not boot when I invert the two virtio disks.

Best regards,
Vincent.

[1]: https://lists.denx.de/pipermail/u-boot/2023-April/514527.html