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Message-ID: <176820498005.510.17111224064295272607.tip-bot2@tip-bot2>
Date: Mon, 12 Jan 2026 08:03:00 -0000
From: "tip-bot2 for Zide Chen" <tip-bot2@...utronix.de>
To: linux-tip-commits@...r.kernel.org
Cc: Zide Chen <zide.chen@...el.com>,
"Peter Zijlstra (Intel)" <peterz@...radead.org>,
Dapeng Mi <dapeng1.mi@...ux.intel.com>, x86@...nel.org,
linux-kernel@...r.kernel.org
Subject: [tip: perf/core] perf/x86/intel/uncore: Add Nova Lake support
The following commit has been merged into the perf/core branch of tip:
Commit-ID: e7d5f2ea0923c5e49ccf94cdaab74a08c865115e
Gitweb: https://git.kernel.org/tip/e7d5f2ea0923c5e49ccf94cdaab74a08c865115e
Author: Zide Chen <zide.chen@...el.com>
AuthorDate: Wed, 31 Dec 2025 14:42:30 -08:00
Committer: Peter Zijlstra <peterz@...radead.org>
CommitterDate: Tue, 06 Jan 2026 16:34:26 +01:00
perf/x86/intel/uncore: Add Nova Lake support
Nova Lake uncore PMON largely follows Panther Lake and supports CBOX,
iMC, cNCU, SANTA, sNCU, and HBO units.
As with Panther Lake, CBOX, cNCU, and SANTA are not enumerated via
discovery tables. Their programming model matches Panther Lake, with
differences limited to MSR addresses and the number of boxes or counters
per box.
The remaining units are enumerated via discovery tables using a new
base MSR (0x711) and otherwise reuse the Panther Lake implementation.
Nova Lake also supports iMC free-running counters.
Signed-off-by: Zide Chen <zide.chen@...el.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Reviewed-by: Dapeng Mi <dapeng1.mi@...ux.intel.com>
Link: https://patch.msgid.link/20251231224233.113839-14-zide.chen@intel.com
---
arch/x86/events/intel/uncore.c | 9 +++++-
arch/x86/events/intel/uncore.h | 1 +-
arch/x86/events/intel/uncore_discovery.h | 2 +-
arch/x86/events/intel/uncore_snb.c | 40 +++++++++++++++++++++++-
4 files changed, 52 insertions(+)
diff --git a/arch/x86/events/intel/uncore.c b/arch/x86/events/intel/uncore.c
index 704591a..4684649 100644
--- a/arch/x86/events/intel/uncore.c
+++ b/arch/x86/events/intel/uncore.c
@@ -1817,6 +1817,13 @@ static const struct uncore_plat_init ptl_uncore_init __initconst = {
.domain[0].global_init = uncore_mmio_global_init,
};
+static const struct uncore_plat_init nvl_uncore_init __initconst = {
+ .cpu_init = nvl_uncore_cpu_init,
+ .mmio_init = ptl_uncore_mmio_init,
+ .domain[0].discovery_base = PACKAGE_UNCORE_DISCOVERY_MSR,
+ .domain[0].global_init = uncore_mmio_global_init,
+};
+
static const struct uncore_plat_init icx_uncore_init __initconst = {
.cpu_init = icx_uncore_cpu_init,
.pci_init = icx_uncore_pci_init,
@@ -1916,6 +1923,8 @@ static const struct x86_cpu_id intel_uncore_match[] __initconst = {
X86_MATCH_VFM(INTEL_LUNARLAKE_M, &lnl_uncore_init),
X86_MATCH_VFM(INTEL_PANTHERLAKE_L, &ptl_uncore_init),
X86_MATCH_VFM(INTEL_WILDCATLAKE_L, &ptl_uncore_init),
+ X86_MATCH_VFM(INTEL_NOVALAKE, &nvl_uncore_init),
+ X86_MATCH_VFM(INTEL_NOVALAKE_L, &nvl_uncore_init),
X86_MATCH_VFM(INTEL_SAPPHIRERAPIDS_X, &spr_uncore_init),
X86_MATCH_VFM(INTEL_EMERALDRAPIDS_X, &spr_uncore_init),
X86_MATCH_VFM(INTEL_GRANITERAPIDS_X, &gnr_uncore_init),
diff --git a/arch/x86/events/intel/uncore.h b/arch/x86/events/intel/uncore.h
index 564cb26..c35918c 100644
--- a/arch/x86/events/intel/uncore.h
+++ b/arch/x86/events/intel/uncore.h
@@ -636,6 +636,7 @@ void adl_uncore_cpu_init(void);
void lnl_uncore_cpu_init(void);
void mtl_uncore_cpu_init(void);
void ptl_uncore_cpu_init(void);
+void nvl_uncore_cpu_init(void);
void tgl_uncore_mmio_init(void);
void tgl_l_uncore_mmio_init(void);
void adl_uncore_mmio_init(void);
diff --git a/arch/x86/events/intel/uncore_discovery.h b/arch/x86/events/intel/uncore_discovery.h
index 63b8f76..e133034 100644
--- a/arch/x86/events/intel/uncore_discovery.h
+++ b/arch/x86/events/intel/uncore_discovery.h
@@ -4,6 +4,8 @@
#define UNCORE_DISCOVERY_MSR 0x201e
/* Base address of uncore perfmon discovery table for CBB domain */
#define CBB_UNCORE_DISCOVERY_MSR 0x710
+/* Base address of uncore perfmon discovery table for the package */
+#define PACKAGE_UNCORE_DISCOVERY_MSR 0x711
/* Generic device ID of a discovery table device */
#define UNCORE_DISCOVERY_TABLE_DEVICE 0x09a7
diff --git a/arch/x86/events/intel/uncore_snb.c b/arch/x86/events/intel/uncore_snb.c
index c663b00..e8e4474 100644
--- a/arch/x86/events/intel/uncore_snb.c
+++ b/arch/x86/events/intel/uncore_snb.c
@@ -256,6 +256,19 @@
/* PTL cNCU register */
#define PTL_UNC_CNCU_MSR_OFFSET 0x140
+/* NVL cNCU register */
+#define NVL_UNC_CNCU_BOX_CTL 0x202e
+#define NVL_UNC_CNCU_FIXED_CTR 0x2028
+#define NVL_UNC_CNCU_FIXED_CTRL 0x2022
+
+/* NVL SANTA register */
+#define NVL_UNC_SANTA_CTR0 0x2048
+#define NVL_UNC_SANTA_CTRL0 0x2042
+
+/* NVL CBOX register */
+#define NVL_UNC_CBOX_PER_CTR0 0x2108
+#define NVL_UNC_CBOX_PERFEVTSEL0 0x2102
+
DEFINE_UNCORE_FORMAT_ATTR(event, event, "config:0-7");
DEFINE_UNCORE_FORMAT_ATTR(umask, umask, "config:8-15");
DEFINE_UNCORE_FORMAT_ATTR(chmask, chmask, "config:8-11");
@@ -1979,3 +1992,30 @@ void ptl_uncore_cpu_init(void)
}
/* end of Panther Lake uncore support */
+
+/* Nova Lake uncore support */
+
+static struct intel_uncore_type *nvl_msr_uncores[] = {
+ &mtl_uncore_cbox,
+ &ptl_uncore_santa,
+ &mtl_uncore_cncu,
+ NULL
+};
+
+void nvl_uncore_cpu_init(void)
+{
+ mtl_uncore_cbox.num_boxes = 12;
+ mtl_uncore_cbox.perf_ctr = NVL_UNC_CBOX_PER_CTR0,
+ mtl_uncore_cbox.event_ctl = NVL_UNC_CBOX_PERFEVTSEL0,
+
+ ptl_uncore_santa.perf_ctr = NVL_UNC_SANTA_CTR0,
+ ptl_uncore_santa.event_ctl = NVL_UNC_SANTA_CTRL0,
+
+ mtl_uncore_cncu.box_ctl = NVL_UNC_CNCU_BOX_CTL;
+ mtl_uncore_cncu.fixed_ctr = NVL_UNC_CNCU_FIXED_CTR;
+ mtl_uncore_cncu.fixed_ctl = NVL_UNC_CNCU_FIXED_CTRL;
+
+ uncore_msr_uncores = nvl_msr_uncores;
+}
+
+/* end of Nova Lake uncore support */
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