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charset="utf-8" The mock auto-region created at module load wrote switch and host-bridge decoder target[] directly, in addition to target_map[]. Real HW programs only target_map[] and resolves target[] as dports enumerate, via update_decoder_targets(). Region replay already follows that ordering, the initial auto-region did not. Drop the direct target[] writes and call cxl_port_update_decoder_targets() so target[] is resolved the same way as real HW and region replay, exercising more of the auto-region driver path. This is inspired by the discussion [1] below: [1]: https://lore.kernel.org/all/20260521084806.28232-1-icheng@nvidia.com/ Suggested-by: Alison Schofield Signed-off-by: Richard Cheng --- cxl_mock_mem didn't load together when I manually modprobe cxl_test module, should we make them loaded together automatically for better user experience? Best regards, Richard Cheng. --- tools/testing/cxl/test/cxl.c | 18 ++++++++++++------ 1 file changed, 12 insertions(+), 6 deletions(-) diff --git a/tools/testing/cxl/test/cxl.c b/tools/testing/cxl/test/cxl.c index 418669927fb0..5266aa3733cb 100644 --- a/tools/testing/cxl/test/cxl.c +++ b/tools/testing/cxl/test/cxl.c @@ -1181,15 +1181,11 @@ static bool mock_init_hdm_decoder(struct cxl_decode= r *cxld) cxlsd =3D to_cxl_switch_decoder(dev); if (i =3D=3D 0) { /* put cxl_mem.4 second in the decode order */ - if (pdev->id =3D=3D 4) { - cxlsd->target[1] =3D dport; + if (pdev->id =3D=3D 4) cxlsd->cxld.target_map[1] =3D dport->port_id; - } else { - cxlsd->target[0] =3D dport; + else cxlsd->cxld.target_map[0] =3D dport->port_id; - } } else { - cxlsd->target[0] =3D dport; cxlsd->cxld.target_map[0] =3D dport->port_id; } cxld =3D &cxlsd->cxld; @@ -1212,6 +1208,16 @@ static bool mock_init_hdm_decoder(struct cxl_decoder= *cxld) cxld->commit =3D mock_decoder_commit; cxld->reset =3D mock_decoder_reset; =20 + /* + * Only target_map[] is programmed above, mimicking + * firmware. On real hardware target[] is populated as + * dports enumerate, via update_decoder_targets(). The + * mock's dports are already bound by now, so fire that + * resolution explicitly here rather than stamping + * target[] directly. + */ + cxl_port_update_decoder_targets(iter, dport); + cxld_registry_update(cxld); put_device(dev); } --=20 2.43.0