On 6/8/26 19:27, Thomas Huth wrote:
On 08/06/2026 14.45, Thomas Huth wrote:
On 02/06/2026 08.48, Chinmay Rath wrote:
From: Nicholas Piggin <[email protected]>
Add some initial PMU testing.
- PMC5/6 tests
- PMAE / PMI test
- BHRB basic tests
Signed-off-by: Nicholas Piggin <[email protected]>
Signed-off-by: Chinmay Rath <[email protected]>
---
lib/powerpc/asm/processor.h | 2 +
lib/powerpc/asm/reg.h | 9 +
lib/powerpc/asm/setup.h | 1 +
lib/powerpc/setup.c | 20 ++
powerpc/Makefile.common | 3 +-
powerpc/pmu.c | 567
++++++++++++++++++++++++++++++++++++
powerpc/unittests.cfg | 3 +
7 files changed, 604 insertions(+), 1 deletion(-)
create mode 100644 powerpc/pmu.c
Hi Chinmay,
the problem with Clang on Travis [*] still seems to persist:
https://app.travis-ci.com/github/huth/kvm-unit-tests/jobs/639614142
Could you please have a look?
Thanks,
Thomas
[*] This already happened with Nicolas' last version:
https://www.spinics.net/lists/kvm/msg351218.html
I managed to get access to a ppc64 machine. The error is:
/tmp/pmu-eab466.s: Assembler messages:
/tmp/pmu-eab466.s:1649: Error: unrecognized opcode: `ldat'
clang: error: assembler command failed with exit code 1 (use -v to see
invocation)
make: *** [<builtin>: powerpc/pmu.o] Error 1
HTH,
Thomas
Hi Thomas,
Thanks for looking into this and providing the exact error message.
I was looking into this Travis CI job that you pointed to and noticed
that the clang version being used was 14.
I was wondering, would it be possible to use a newer version of clang
for the job since LDAT is a legit PPC insn,
that was introduced with Power 9, ISA version 3.0, way back a decade in
2016 !
So I was wondering if using a newer version of clang that recognizes the
instruction would be a better approach.
I checked the .travis.yml file (config) for the job, which mentions :
|apt_packages: clang qemu-system-ppc|
Can we change it to something like :
|apt_packages: clang19 qemu-system-ppc |or (clang-19) ?
In the same config s390x uses a specific version of clang that is 11 in
similar manner.
However if you'd still prefer working around LDAT, I could try with
LDARX instead, but I am unable to verify if
clang-14 will recognize that since the oldest version of clang I could
find in ppc64le repo was clang-15 which
was able to work with LDAT as well. Hence, could you help me with
providing the steps to use Travis-CI so I could verify ?
(I had skipped doing the credit card payment while signing up, in case
that's mandatory for Travis CI. Pardon me I'm new to it XD)
Thanks,
Chinmay
