powerpc/perf/hv-24x7: Fix passing of catalog version number
authorThiago Jung Bauermann <bauerman@linux.vnet.ibm.com>
Thu, 29 Jun 2017 21:55:31 +0000 (18:55 -0300)
committerMichael Ellerman <mpe@ellerman.id.au>
Sun, 2 Jul 2017 10:40:29 +0000 (20:40 +1000)
commit12bf85a71000af7419b19b5e90910919f36f336c
tree694b0a1292ed0da2f55f5c14068c02fdaa141e60
parentc07424414c28c8ae9a54803a4496e4d8718b3613
powerpc/perf/hv-24x7: Fix passing of catalog version number

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 <sukadev@linux.vnet.ibm.com>
Signed-off-by: Thiago Jung Bauermann <bauerman@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
arch/powerpc/perf/hv-24x7.c