diff options
| author | Kim Phillips <kim.phillips@amd.com> | 2020-03-13 18:10:23 -0500 |
|---|---|---|
| committer | Borislav Petkov <bp@suse.de> | 2020-03-17 13:00:49 +0100 |
| commit | 9689dbbeaea884d19e3085439c6a247ef986b2af (patch) | |
| tree | 32d4a13dfb849ef1ceac52fa7074213a74b25ae2 /arch/x86/events | |
| parent | 4dcc3df82573a946c620dda5fb00e27c7b080105 (diff) | |
perf/amd/uncore: Make L3 thread mask code more readable
Convert the l3_thread_slice_mask() function to use the more readable
topology_* helper functions, more intuitive variable names like shift
and thread_mask, and BIT_ULL().
No functional changes.
Signed-off-by: Kim Phillips <kim.phillips@amd.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20200313231024.17601-2-kim.phillips@amd.com
Diffstat (limited to 'arch/x86/events')
| -rw-r--r-- | arch/x86/events/amd/uncore.c | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/arch/x86/events/amd/uncore.c b/arch/x86/events/amd/uncore.c index 2abcb1abd07c..07af497b517f 100644 --- a/arch/x86/events/amd/uncore.c +++ b/arch/x86/events/amd/uncore.c @@ -185,13 +185,16 @@ static void amd_uncore_del(struct perf_event *event, int flags) */ static u64 l3_thread_slice_mask(int cpu) { - int thread = 2 * (cpu_data(cpu).cpu_core_id % 4); + u64 thread_mask, core = topology_core_id(cpu); + unsigned int shift, thread = 0; - if (smp_num_siblings > 1) - thread += cpu_data(cpu).apicid & 1; + if (topology_smt_supported() && !topology_is_primary_thread(cpu)) + thread = 1; - return (1ULL << (AMD64_L3_THREAD_SHIFT + thread) & - AMD64_L3_THREAD_MASK) | AMD64_L3_SLICE_MASK; + shift = AMD64_L3_THREAD_SHIFT + 2 * (core % 4) + thread; + thread_mask = BIT_ULL(shift); + + return AMD64_L3_SLICE_MASK | thread_mask; } static int amd_uncore_event_init(struct perf_event *event) |