linux-kernel - [tip: perf/core] perf/x86/intel/uncore: Support IIO free-running counters on GNR

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Date:   Wed, 29 Nov 2023 08:19:15 -0000
From:   "tip-bot2 for Kan Liang" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     Kan Liang <kan.liang@...ux.intel.com>,
        "Peter Zijlstra (Intel)" <peterz@...radead.org>,
        Ammy Yi <ammy.yi@...el.com>, x86@...nel.org,
        linux-kernel@...r.kernel.org
Subject: [tip: perf/core] perf/x86/intel/uncore: Support IIO free-running
 counters on GNR

The following commit has been merged into the perf/core branch of tip:

Commit-ID:     388d76175bd9bbad52bbff25c88361d9e5c6615e
Gitweb:        https://git.kernel.org/tip/388d76175bd9bbad52bbff25c88361d9e5c6615e
Author:        Kan Liang <kan.liang@...ux.intel.com>
AuthorDate:    Fri, 17 Nov 2023 08:39:38 -08:00
Committer:     Peter Zijlstra <peterz@...radead.org>
CommitterDate: Fri, 24 Nov 2023 20:25:02 +01:00

perf/x86/intel/uncore: Support IIO free-running counters on GNR

The free-running counters for IIO uncore blocks on Granite Rapids are
similar to Sapphire Rapids. The key difference is the offset of the
registers. The number of the IIO uncore blocks can also be retrieved
from the discovery table.

Signed-off-by: Kan Liang <kan.liang@...ux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Tested-by: Ammy Yi <ammy.yi@...el.com>
Link: https://lore.kernel.org/r/20231117163939.2468007-4-kan.liang@linux.intel.com
---
 arch/x86/events/intel/uncore_snbep.c | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/arch/x86/events/intel/uncore_snbep.c b/arch/x86/events/intel/uncore_snbep.c
index ab31cda..aeaa8ef 100644
--- a/arch/x86/events/intel/uncore_snbep.c
+++ b/arch/x86/events/intel/uncore_snbep.c
@@ -6648,11 +6648,21 @@ static struct intel_uncore_type *gnr_uncores[UNCORE_GNR_NUM_UNCORE_TYPES] = {
 	NULL,
 };
 
+static struct freerunning_counters gnr_iio_freerunning[] = {
+	[SPR_IIO_MSR_IOCLK]	= { 0x290e, 0x01, 0x10, 1, 48 },
+	[SPR_IIO_MSR_BW_IN]	= { 0x360e, 0x10, 0x80, 8, 48 },
+	[SPR_IIO_MSR_BW_OUT]	= { 0x2e0e, 0x10, 0x80, 8, 48 },
+};
+
 void gnr_uncore_cpu_init(void)
 {
-	uncore_msr_uncores = uncore_get_uncores(UNCORE_ACCESS_MSR, 0, NULL,
+	uncore_msr_uncores = uncore_get_uncores(UNCORE_ACCESS_MSR,
+						UNCORE_SPR_MSR_EXTRA_UNCORES,
+						spr_msr_uncores,
 						UNCORE_GNR_NUM_UNCORE_TYPES,
 						gnr_uncores);
+	spr_uncore_iio_free_running.num_boxes = uncore_type_max_boxes(uncore_msr_uncores, UNCORE_SPR_IIO);
+	spr_uncore_iio_free_running.freerunning = gnr_iio_freerunning;
 }
 
 int gnr_uncore_pci_init(void)