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perf/x86/intel/uncore: Support CoffeeLake 8th CBOX 

Coffee Lake has 8 core products which has 8 Cboxes. The 8th CBOX is
mapped into different MSR space.

Increase the num_boxes to 8 to handle the new products. It will not
impact the previous platforms, SkyLake, KabyLake and earlier CoffeeLake.
Because the num_boxes will be recalculated in uncore_cpu_init and
doesn't exceed the x86_max_cores.

Introduce a new box flag bit to indicate the 8th CBOX.

Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Link: http://lkml.kernel.org/r/20181019170419.378-2-kan.liang@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Kan Liang 2018-10-19 10:04:19 -07:00 committed by Ingo Molnar
parent c10a8de0d3
commit 4d47d6407a
2 changed files with 30 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
arch/x86/events/intel/uncore.h
View File

@ -129,8 +129,15 @@ struct intel_uncore_box {
struct intel_uncore_extra_reg shared_regs[0];
};
/* CFL uncore 8th cbox MSRs */
#define CFL_UNC_CBO_7_PERFEVTSEL0 0xf70
#define CFL_UNC_CBO_7_PER_CTR0 0xf76
#define UNCORE_BOX_FLAG_INITIATED 0
#define UNCORE_BOX_FLAG_CTL_OFFS8 1 /* event config registers are 8-byte apart */
/* event config registers are 8-byte apart */
#define UNCORE_BOX_FLAG_CTL_OFFS8 1
/* CFL 8th CBOX has different MSR space */
#define UNCORE_BOX_FLAG_CFL8_CBOX_MSR_OFFS 2
struct uncore_event_desc {
struct kobj_attribute attr;
@ -297,18 +304,28 @@ unsigned int uncore_freerunning_counter(struct intel_uncore_box *box,
static inline
unsigned uncore_msr_event_ctl(struct intel_uncore_box *box, int idx)
{
if (test_bit(UNCORE_BOX_FLAG_CFL8_CBOX_MSR_OFFS, &box->flags)) {
return CFL_UNC_CBO_7_PERFEVTSEL0 +
(box->pmu->type->pair_ctr_ctl ? 2 * idx : idx);
} else {
return box->pmu->type->event_ctl +
(box->pmu->type->pair_ctr_ctl ? 2 * idx : idx) +
uncore_msr_box_offset(box);
}
}
static inline
unsigned uncore_msr_perf_ctr(struct intel_uncore_box *box, int idx)
{
if (test_bit(UNCORE_BOX_FLAG_CFL8_CBOX_MSR_OFFS, &box->flags)) {
return CFL_UNC_CBO_7_PER_CTR0 +
(box->pmu->type->pair_ctr_ctl ? 2 * idx : idx);
} else {
return box->pmu->type->perf_ctr +
(box->pmu->type->pair_ctr_ctl ? 2 * idx : idx) +
uncore_msr_box_offset(box);
}
}
static inline
unsigned uncore_fixed_ctl(struct intel_uncore_box *box)

6
arch/x86/events/intel/uncore_snb.c
View File

@ -221,6 +221,10 @@ static void skl_uncore_msr_init_box(struct intel_uncore_box *box)
wrmsrl(SKL_UNC_PERF_GLOBAL_CTL,
SNB_UNC_GLOBAL_CTL_EN | SKL_UNC_GLOBAL_CTL_CORE_ALL);
}
/* The 8th CBOX has different MSR space */
if (box->pmu->pmu_idx == 7)
__set_bit(UNCORE_BOX_FLAG_CFL8_CBOX_MSR_OFFS, &box->flags);
}
static void skl_uncore_msr_enable_box(struct intel_uncore_box *box)
@ -247,7 +251,7 @@ static struct intel_uncore_ops skl_uncore_msr_ops = {
static struct intel_uncore_type skl_uncore_cbox = {
.name = "cbox",
.num_counters = 4,
.num_boxes = 5,
.num_boxes = 8,
.perf_ctr_bits = 44,
.fixed_ctr_bits = 48,
.perf_ctr = SNB_UNC_CBO_0_PER_CTR0,