[0/5] cxl/hdm: Decoder enumeration fixes

Message

Dan Williams April 14, 2023, 6:53 p.m. UTC

While testing region autodetect with physical hardware a few fixes fell
out. The most interesting being evidence that a device is sensitive to
8-byte reads of 2 consecutive 4-byte registers. The other is a long
reported issue by Jonathan on how "passthrough" decoders are detected,
and having an example with physical hardware to reinforce the
observation from QEMU.

The rest are ancillary fixes and new debug messages.

---

Dan Williams (5):
      cxl/hdm: Fail upon detecting 0-sized decoders
      cxl/hdm: Use 4-byte reads to retrieve HDM decoder base+limit
      cxl/core: Drop unused io-64-nonatomic-lo-hi.h
      cxl/port: Scan single-target ports for decoders
      cxl/hdm: Add more HDM decoder debug messages at startup


 drivers/cxl/core/hdm.c  |   52 ++++++++++++++++++++++++++++++++++++-----------
 drivers/cxl/core/mbox.c |    1 -
 drivers/cxl/core/port.c |    1 -
 drivers/cxl/port.c      |   18 ++++++++++++----
 4 files changed, 53 insertions(+), 19 deletions(-)

base-commit: 24b18197184ac39bb8566fb82c0bf788bcd0d45b