From: Kim Phillips kim.phillips@amd.com
mainline inclusion from mainline-v5.7-rc1 commit 4dcc3df82573a946c620dda5fb00e27c7b080105 category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/I4MKP4 CVE: NA
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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 Signed-off-by: Jackie Liu liuyun01@kylinos.cn #openEuler_contributor Signed-off-by: Laibin Qiu qiulaibin@huawei.com --- arch/x86/events/amd/uncore.c | 25 ++++++++++++++++--------- 1 file changed, 16 insertions(+), 9 deletions(-)
diff --git a/arch/x86/events/amd/uncore.c b/arch/x86/events/amd/uncore.c index b3ab1658a309..353765cab5c5 100644 --- a/arch/x86/events/amd/uncore.c +++ b/arch/x86/events/amd/uncore.c @@ -183,6 +183,20 @@ 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; @@ -217,15 +231,8 @@ 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)