70 lines
2.2 KiB
Diff
70 lines
2.2 KiB
Diff
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From 8fd2da09b0c534e05a7b12eb578afae27ad20f7d Mon Sep 17 00:00:00 2001
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From: Dhananjay Ugwekar <Dhananjay.Ugwekar@amd.com>
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Date: Fri, 15 Nov 2024 06:07:59 +0000
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Subject: perf/x86/rapl: Remove the cpu_to_rapl_pmu() function
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Prepare for the addition of RAPL core energy counter support.
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Post which, one CPU might be mapped to more than one rapl_pmu
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(package/die one and a core one). So, remove the cpu_to_rapl_pmu()
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function.
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Signed-off-by: Dhananjay Ugwekar <Dhananjay.Ugwekar@amd.com>
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Reviewed-by: Zhang Rui <rui.zhang@intel.com>
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Tested-by: Zhang Rui <rui.zhang@intel.com>
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---
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arch/x86/events/rapl.c | 24 +++++++++++-------------
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1 file changed, 11 insertions(+), 13 deletions(-)
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--- a/arch/x86/events/rapl.c
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+++ b/arch/x86/events/rapl.c
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@@ -157,22 +157,15 @@ static struct perf_msr *rapl_msrs;
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* RAPL PMU scope.
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*/
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static inline unsigned int get_rapl_pmu_idx(int cpu)
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-{
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+{ /*
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+ * Returns unsigned int, which converts the '-1' return value
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+ * (for non-existent mappings in topology map) to UINT_MAX, so
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+ * the error check in the caller is simplified.
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+ */
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return rapl_pmu_is_pkg_scope() ? topology_logical_package_id(cpu) :
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topology_logical_die_id(cpu);
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}
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-static inline struct rapl_pmu *cpu_to_rapl_pmu(unsigned int cpu)
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-{
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- unsigned int rapl_pmu_idx = get_rapl_pmu_idx(cpu);
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-
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- /*
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- * The unsigned check also catches the '-1' return value for non
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- * existent mappings in the topology map.
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- */
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- return rapl_pmu_idx < rapl_pmus->nr_rapl_pmu ? rapl_pmus->pmus[rapl_pmu_idx] : NULL;
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-}
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-
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static inline u64 rapl_read_counter(struct perf_event *event)
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{
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u64 raw;
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@@ -350,6 +343,7 @@ static int rapl_pmu_event_init(struct pe
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u64 cfg = event->attr.config & RAPL_EVENT_MASK;
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int bit, ret = 0;
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struct rapl_pmu *pmu;
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+ unsigned int rapl_pmu_idx;
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/* only look at RAPL events */
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if (event->attr.type != rapl_pmus->pmu.type)
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@@ -376,8 +370,12 @@ static int rapl_pmu_event_init(struct pe
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if (event->attr.sample_period) /* no sampling */
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return -EINVAL;
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+ rapl_pmu_idx = get_rapl_pmu_idx(event->cpu);
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+ if (rapl_pmu_idx >= rapl_pmus->nr_rapl_pmu)
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+ return -EINVAL;
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+
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/* must be done before validate_group */
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- pmu = cpu_to_rapl_pmu(event->cpu);
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+ pmu = rapl_pmus->pmus[rapl_pmu_idx];
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if (!pmu)
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return -EINVAL;
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event->pmu_private = pmu;
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