Michael Ellerman [off-list ref] writes:

On Thu, 2017-06-29 at 21:55:31 UTC, Thiago Jung Bauermann wrote:

quoted

H_GET_24X7_CATALOG_PAGE needs to be passed the version number obtained from
the first catalog page obtained previously. This is a 64 bit number, but
create_events_from_catalog truncates it to 32-bit.

This worked on POWER8, but POWER9 actually uses the upper bits so the call
fails with H_P3 because the hypervisor doesn't recognize the version.

This patch also adds the hcall return code to the error message, which is
helpful when debugging the problem.

Fixes: 5c5cd7b50259 ("powerpc/perf/hv-24x7: parse catalog and populate sysfs with events")
Reviewed-by: Sukadev Bhattiprolu <redacted>
Signed-off-by: Thiago Jung Bauermann <redacted>

Series applied to powerpc next, thanks.

https://git.kernel.org/powerpc/c/12bf85a71000af7419b19b5e909109

Thanks!

-- 
Thiago Jung Bauermann
IBM Linux Technology Center