diff options
| author | Kan Liang <[email protected]> | 2024-06-26 07:35:34 -0700 |
|---|---|---|
| committer | Peter Zijlstra <[email protected]> | 2024-07-04 16:00:36 +0200 |
| commit | 722e42e45c2f1c6d1adec7813651dba5139f52f4 (patch) | |
| tree | 6110b0fd8d8877d8d9e9a9928ab5ff7d430e29a8 /tools/testing/selftests/bpf/progs/test_autoload.c | |
| parent | a23eb2fc1d818cdac9b31f032842d55483a6a040 (diff) | |
perf/x86: Support counter mask
The current perf assumes that both GP and fixed counters are contiguous.
But it's not guaranteed on newer Intel platforms or in a virtualization
environment.
Use the counter mask to replace the number of counters for both GP and
the fixed counters. For the other ARCHs or old platforms which don't
support a counter mask, using GENMASK_ULL(num_counter - 1, 0) to
replace. There is no functional change for them.
The interface to KVM is not changed. The number of counters still be
passed to KVM. It can be updated later separately.
Signed-off-by: Kan Liang <[email protected]>
Signed-off-by: Peter Zijlstra (Intel) <[email protected]>
Reviewed-by: Andi Kleen <[email protected]>
Reviewed-by: Ian Rogers <[email protected]>
Link: https://lkml.kernel.org/r/[email protected]
Diffstat (limited to 'tools/testing/selftests/bpf/progs/test_autoload.c')
0 files changed, 0 insertions, 0 deletions