On 10/06/2026 11.27, Chinmay Rath wrote:
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 can reproduce the very same issue on a ppc64le box with Clang 22:
# clang --version
clang version 22.1.6 (Fedora 22.1.6-1.fc44)
Target: ppc64le-redhat-linux-gnu
Thread model: posix
InstalledDir: /usr/bin
Configuration file: /etc/clang/ppc64le-redhat-linux-gnu-clang.cfg
# make
clang -no-integrated-as -std=gnu99 -ffreestanding -O2 -msoft-float
-mno-altivec -I /root/kvm-unit-tests/lib -I /root/kvm-unit-tests/lib/libfdt
-I lib -Wa,-mregnames -g -MMD -MP -MF powerpc/.pmu.d -fno-strict-aliasing
-fno-common -Wall -Wwrite-strings -Wempty-body -Wuninitialized
-Wignored-qualifiers -Wno-missing-braces -Werror -fomit-frame-pointer
-fno-stack-protector -Wno-frame-address -fno-pic
-Wunused-but-set-parameter -Wno-override-init -Wmissing-prototypes
-Wstrict-prototypes -mlittle-endian -c -o powerpc/pmu.o powerpc/pmu.c
/tmp/pmu-f0c247.s: Assembler messages:
/tmp/pmu-f0c247.s:1656: 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
Does compiling with Clang work for you? If so, which version?
Thomas
