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perf/amd/uncore: Prepare L3 thread mask code for Family 19h

Browse source 
In order to better accommodate the upcoming Family 19h, given
the 80-char line limit, move the existing code into a new
l3_thread_slice_mask() function.

No functional changes.

 [ bp: Touchups. ]

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/20200313231024.17601-1-kim.phillips@amd.com
This commit is contained in:
Kim Phillips 2020-03-13 18:10:22 -05:00 committed by Borislav Petkov
parent 95ed6c707f
commit 4dcc3df825
1 changed files with 16 additions and 9 deletions
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25
arch/x86/events/amd/uncore.c
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@ -180,6 +180,20 @@ static void amd_uncore_del(struct perf_event *event, int flags)
hwc->idx = -1;
}
/*
* Convert logical CPU number to L3 PMC Config ThreadMask format
*/
static u64 l3_thread_slice_mask(int cpu)
{
int thread = 2 * (cpu_data(cpu).cpu_core_id % 4);
if (smp_num_siblings > 1)
thread += cpu_data(cpu).apicid & 1;
return (1ULL << (AMD64_L3_THREAD_SHIFT + thread) &
AMD64_L3_THREAD_MASK) | AMD64_L3_SLICE_MASK;
}
static int amd_uncore_event_init(struct perf_event *event)
{
struct amd_uncore *uncore;
@ -209,15 +223,8 @@ static int amd_uncore_event_init(struct perf_event *event)
* SliceMask and ThreadMask need to be set for certain L3 events in
* Family 17h. For other events, the two fields do not affect the count.
*/
if (l3_mask && is_llc_event(event)) {
int thread = 2 * (cpu_data(event->cpu).cpu_core_id % 4);
if (smp_num_siblings > 1)
thread += cpu_data(event->cpu).apicid & 1;
hwc->config |= (1ULL << (AMD64_L3_THREAD_SHIFT + thread) &
AMD64_L3_THREAD_MASK) | AMD64_L3_SLICE_MASK;
}
if (l3_mask && is_llc_event(event))
hwc->config |= l3_thread_slice_mask(event->cpu);
uncore = event_to_amd_uncore(event);
if (!uncore)