Re: [PULL 15/15] pc-bios/s390-ccw.img: update s390x bios

[Eric Farman <farman@linux.ibm.com>]

On 8/13/26 4:38 PM, Michael Tokarev wrote:
> On 8/12/26 20:17, Eric Farman wrote:
>> Update the s390 bios with recent fixes for out-of-bounds accesses.
>>
>> Signed-off-by: Eric Farman <farman@linux.ibm.com>
>> ---
>>   pc-bios/s390-ccw.img | Bin 104136 -> 104216 bytes
>>   1 file changed, 0 insertions(+), 0 deletions(-)
> 
> How do you guys build s390x-ccw.img - which compiler version(s) are
> used for that?

This was gcc-16.1.1

> 
> Since we're updating source files in the stable series, where this
> image is not the same as in current master, I'll have to rebuild
> it after patching.  Now I wonder how should I build it.
> 
> In official debian we always build it from source, and there were no
> complains - maybe because no one uses debian to run qemu-system-s390x? :)
> 
> Anyway, on debian stable we have gcc-14.2.0, -- is it okay to use it for
> building the image?

I should think so. But if it doesn't work, let's look into why.

> 
> Also, there's little changes in s390-ccw.img between qemu 11.0 and 11.1,
> here's the list:
> 
>   b2b5dec9295 s390x: Enable boot menu for virtio pci device
>   d0473643803 pc-bios/s390-ccw: write IPLB location for non-net virtio 
> devices
>   e26dafb207b pc-bios/s390-ccw: Verify virtio support when booting from 
> virtio PCI device on s390x
>   084feb90980 pc-bios/s390-ccw: Add per-queue notification offset for 
> multi-queue virtio configurations
>   730173107a9 pc-bios/s390-ccw/virtio.c: Fix missing break for PCI 
> notifications
>   c12bb74fd57 pc-bios/s390-ccw: Refactor byte swapping
> 
> I think I can pick all that stuff for 11.0.x series just fine, to avoid
> (re)building the image for 11.0.x series.
> 
> For 10.0.x, things are really much larger:
> 
>   14c29f29064 pc-bios/s390-ccw: Fix compiler warning when compiling with 
> DEBUG enabled
>   d72fb5e6b2e pc-bios/s390-ccw: Add support for virtio-blk-pci IPL
>   40d80aedd5a pc-bios/s390-ccw: Introduce virtio-pci functions
>   5ed17bb32ab pc-bios/s390-ccw: Introduce PCI device
>   d3da8afd1dd pc-bios/s390-ccw: Introduce CLP Architecture
>   4ff1499adab pc-bios/s390-ccw: Split virtio-ccw and generic virtio
>   ada7a60056c pc-bios/s390-ccw: Store device type independent of sense data
>   4228a92b2a3 s390x: Remove duplicate definitions of IPL types
>   dd8c8f16c02 pc-bios/s390-ccw: Always reset virtio device on failed 
> boot attempt
>   5dbabcfee89 pc-bios/s390-ccw: Remove redundant vring schid attribute
>   1ef532cbcfc pc-bios/s390-ccw: Fix misattributed function prototypes
>   acb00a7aae4 pc-bios/s390-ccw: link statically
>   fc24fd9342e pc-bios/s390-ccw: Add a boot menu for booting via 
> pxelinux.cfg
>   47d68f7475f pc-bios/s390-ccw: Make get_boot_index() from menu.c global
>   108977796fb pc-bios/s390-ccw: Allow up to 31 entries for pxelinux.cfg
>   a4adf071dc7 pc-bios/s390-ccw: Allow to select a different pxelinux.cfg 
> entry via loadparm
> 
> basically it's whole virtio and pci support added, which might be too much?
> Please note that 10.0.x is an LTS series, also used in current debian 
> stable
> (trixie), so maybe it is also okay to pick everything up to this series, to
> bring the image in-line with current development.
> 
> In this case I'll just pick the commits updating the image too :)
> 
> What do you think?

Yeah, might be a bit much. The smaller fixes were contained enough that 
targeting them for stable made sense. Of the four fixes that were in 
this rebuild, three of the blamed commits date to the v2/v3 days. The 
fourth went in in 9.2.

Everything else in your lists is new function and whatnot, so my gut 
says leave it there.

Thanks,
Eric