Re: ndctl cxl test suite fails in arm64 QEMU

[Alison Schofield <alison.schofield@intel.com>]

On Tue, Feb 25, 2025 at 01:09:57PM +0900, Itaru Kitayama wrote:
> Hi,
> 
> Has anyone noticed the ndctl cxl test suite failures I reported below on arm64, QEMU emulation?
> 
> https://github.com/pmem/ndctl/issues/278
> 
> I’m using Jonathan’s latest CXL capable QEMU [1], and the latest CXL kernel [2].

Hi Itaru,

Looking at region.c:size_store() it seems that alloc_hpa() is failing.
(kstrtou64 is arch independent and it works for me with same script &
value)

Check the dmesg log at the time of the failure. alloc_hpa() may be
emitting a message.  (In the run_qemu.sh cmdline add '--cxl-debug')

Sounds like Marc is on to something and maybe the KASLR is known
to cause this problem.

Thanks for posting to this list and send any further questions or
comments. Happy to have you using run_qemu.sh and the cxl tests!

Alison


> 
> [1] https://gitlab.com/jic23/qemu/ cxl-2025-02-20
> [2] https://git.kernel.org/pub/scm/linux/kernel/git/cxl/cxl.git/
> 
> Thanks,
> Itaru.