Re: [PATCH v8 0/3] Support zero-sized HDM decoders

[Richard Cheng]

On Fri, Jul 31, 2026 at 11:52:42AM +0800, Alison Schofield wrote:
> On Fri, Jul 31, 2026 at 02:48:59PM +0800, Richard Cheng wrote:
> 
> skip...
> 
> > 
> > Full cxl suite with mock_zero_size_decoders off -- no failures:
> > """
> > $ sudo env "PATH=$PATH" meson test -C build --suite cxl \
> >     --num-processes 1 -t 6 --print-errorlogs
> >  1/16 ndctl:cxl / cxl-topology.sh       OK                7.81s
> >  2/16 ndctl:cxl / cxl-region-sysfs.sh   OK                5.28s
> >  3/16 ndctl:cxl / cxl-labels.sh         OK                3.27s
> >  4/16 ndctl:cxl / cxl-create-region.sh  OK               10.70s
> >  5/16 ndctl:cxl / cxl-xor-region.sh     OK                5.76s
> >  6/16 ndctl:cxl / cxl-events.sh         OK                2.77s
> >  7/16 ndctl:cxl / cxl-sanitize.sh       OK                5.73s
> >  8/16 ndctl:cxl / cxl-destroy-region.sh OK                4.16s
> >  9/16 ndctl:cxl / cxl-qos-class.sh      OK                3.25s
> > 10/16 ndctl:cxl / cxl-translate.sh      OK                0.94s
> > 11/16 ndctl:cxl / cxl-elc.sh            OK                4.21s
> > 12/16 ndctl:cxl / cxl-dax-hmem.sh       OK                4.56s
> > 13/16 ndctl:cxl / cxl-region-replay.sh  OK                8.66s
> > 14/16 ndctl:cxl / cxl-security.sh       SKIP              0.02s
> > 15/16 ndctl:cxl / cxl-features.sh       OK                1.42s
> > 16/16 ndctl:cxl / cxl-poison.sh         SKIP             11.23s
> 
> Hi Richard,
> 
> Curious about the SKIPs.
> 
> I'm running this w the base commit you noted, and no skips, so no
> functional worry. This must be environment. Guessing you're hitting
> the first do_skip of cxl-poison.sh, no CONFIG_TRACING. Maybe the
> keyutils for cxl-security.sh.
> 
> Please take a look and see if you can update your environment.
> Poison one is obvious, since this series is touching poison. Security
> one is less obvious, but as Anisa recently showed us w DCD, a seemingly
> unrelated test can uncover latent issues.
> 
> -- Alison
>

Hi Alison,

I re-check my machine, and I make cxl-security,sh work now, I missed to install keyutils.
And I do have CONFIG_TRACING turned on, cxl-poison.sh won't work on my machine because
the alignment problem.

On my machine
is_unaligned region2 3
addr=105491107676160
align=805306368
do_skip 'unaligned region not available for testing'

105491107676160 is exactly 805306368 * 130995, so the x3 XOR region lands aligned and there's nothing
unaligned to translate against.

cxl_test anchors its pool at "min(iomem_resource.end + 1 - SZ_64G, mappable.end + 1 - SZ_64G)"

so the window base follows the host memory gap, and no module param moves it.

I'm not sure this is really my setup's environment issue or in fact a test gap ?
If it's the latter I would be happt to fix it in a follow up patch.

Both run_poison_test() rounds pass, so I think everything this series touches is covered, only the unaligned
translation section is unreachable, and this series doesn't touch translation.

Personally I think this is enough prove of test for the serie ? what do you think ?

Best regards,
Richard Cheng.