From nobody Sat Feb 7 08:02:23 2026 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.8]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 976C82874E1; Wed, 14 Jan 2026 01:22:21 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.8 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768353743; cv=none; b=Z8uPNRGYFtbGSA/NtaDpC33+FhZj8DGnQbrpBnk0dAvXfiR507zcbaLBiVuHws7ndLdE5wLJIJan4p5u1kLNfoazKNRwXm1YNiZXdJ/RyK7Uhg4+9Hxo0FjKJmbMq0KVlgzzcoddKWDhkhbKu26liEopaPxJJ6qXu4h9u4iZnVM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768353743; c=relaxed/simple; bh=/bqpYVKmFTI0Ol3j3AxBQxHuOUyFVGiVyJnNvDDfau8=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=pXqUYrsVf6KphY5dZoGF72f29FsLpml5BY6opBpGZ2lh3F2GxFcuOwuRdEKTfz6g5P5fVgCSQnBPQIpAeR2KTb426WIZfqb/GdGpsBl/tlL+3mnQJn//qIZwbhhZSkWTNafMXvm8oD2V0zGXI206Ggb3O0MYcEAf54UoX4g8xYM= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com; spf=pass smtp.mailfrom=linux.intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=V9oy/aIf; arc=none smtp.client-ip=192.198.163.8 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="V9oy/aIf" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1768353741; x=1799889741; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=/bqpYVKmFTI0Ol3j3AxBQxHuOUyFVGiVyJnNvDDfau8=; b=V9oy/aIfdG/nUciLiLdD6DzOuJkKUTBXdPsz5WQx9ZbdNUc2DyQOnolk dHe6b5wnvVOSdeGBSIehaY84xOKXaekaJoyGPhC88JraxblYlWDI5eyw5 L8uwTZZ97o8SAW1INSzPbiEhubInCDvu0eRbeADN9kdfS4pWEGTviJctj 1q4XPDsZQwEZAqvM+KR+Suzqcv6YgVWureZVySpAIPXYybmEkwxV3LKZA sh52S8KST9Cgl/uo8MjF1bR4bjooHYeWJv2wus1yxRIHgxSYq6CQ8jYXS pHBP3K/yqmBFuPpSicqSArv2EJaSvEM9lszL1beEWuAIKm2hfFaCXvcEk w==; X-CSE-ConnectionGUID: FMZpc/NOSkiBl0wo2xFtjQ== X-CSE-MsgGUID: BuH6EF9SQ+qaSMCyABRj2Q== X-IronPort-AV: E=McAfee;i="6800,10657,11670"; a="87231512" X-IronPort-AV: E=Sophos;i="6.21,224,1763452800"; d="scan'208";a="87231512" Received: from orviesa007.jf.intel.com ([10.64.159.147]) by fmvoesa102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 13 Jan 2026 17:22:21 -0800 X-CSE-ConnectionGUID: oP772wZCRlqMqtwXfaEvGQ== X-CSE-MsgGUID: W5PfsqUGQaSn0pNhfLcdyQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.21,224,1763452800"; d="scan'208";a="204561208" Received: from spr.sh.intel.com ([10.112.230.239]) by orviesa007.jf.intel.com with ESMTP; 13 Jan 2026 17:22:17 -0800 From: Dapeng Mi To: Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Namhyung Kim , Ian Rogers , Adrian Hunter , Alexander Shishkin , Andi Kleen , Eranian Stephane Cc: linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, Dapeng Mi , Zide Chen , Falcon Thomas , Xudong Hao , Dapeng Mi Subject: [Patch v3 4/7] perf/x86/intel: Add support for PEBS memory auxiliary info field in NVL Date: Wed, 14 Jan 2026 09:17:47 +0800 Message-Id: <20260114011750.350569-5-dapeng1.mi@linux.intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260114011750.350569-1-dapeng1.mi@linux.intel.com> References: <20260114011750.350569-1-dapeng1.mi@linux.intel.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Similar to DMR (Panther Cove uarch), both P-core (Coyote Cove uarch) and E-core (Arctic Wolf uarch) of NVL adopt the new PEBS memory auxiliary info layout. Coyote Cove microarchitecture shares the same PMU capabilities, including the memory auxiliary info layout, with Panther Cove. Arctic Wolf microarchitecture has a similar layout to Panther Cove, with the only difference being specific data source encoding for L2 hit cases (up to the L2 cache level). The OMR encoding remains the same as in Panther Cove. For detailed information on the memory auxiliary info encoding, please refer to section 16.2 "PEBS LOAD LATENCY AND STORE LATENCY FACILITY" in the latest ISE documentation. This patch defines Arctic Wolf specific data source encoding and then supports PEBS memory auxiliary info field for NVL. Signed-off-by: Dapeng Mi --- arch/x86/events/intel/ds.c | 83 ++++++++++++++++++++++++++++++++++++ arch/x86/events/perf_event.h | 2 + 2 files changed, 85 insertions(+) diff --git a/arch/x86/events/intel/ds.c b/arch/x86/events/intel/ds.c index 06e42ac33749..a47f173d411b 100644 --- a/arch/x86/events/intel/ds.c +++ b/arch/x86/events/intel/ds.c @@ -96,6 +96,18 @@ union intel_x86_pebs_dse { unsigned int pnc_fb_full:1; unsigned int ld_reserved8:16; }; + struct { + unsigned int arw_dse:8; + unsigned int arw_l2_miss:1; + unsigned int arw_xq_promotion:1; + unsigned int arw_reissue:1; + unsigned int arw_stlb_miss:1; + unsigned int arw_locked:1; + unsigned int arw_data_blk:1; + unsigned int arw_addr_blk:1; + unsigned int arw_fb_full:1; + unsigned int ld_reserved9:16; + }; }; =20 =20 @@ -274,6 +286,29 @@ static u64 pnc_pebs_l2_hit_data_source[PNC_PEBS_DATA_S= OURCE_MAX] =3D { OP_LH | P(LVL, UNC) | LEVEL(NA) | P(SNOOP, NONE), /* 0x0f: uncached */ }; =20 +/* Version for Arctic Wolf and later */ + +/* L2 hit */ +#define ARW_PEBS_DATA_SOURCE_MAX 16 +static u64 arw_pebs_l2_hit_data_source[ARW_PEBS_DATA_SOURCE_MAX] =3D { + P(OP, LOAD) | P(LVL, NA) | LEVEL(NA) | P(SNOOP, NA), /* 0x00: non-cache a= ccess */ + OP_LH | P(LVL, L1) | LEVEL(L1) | P(SNOOP, NONE), /* 0x01: L1 hit */ + OP_LH | P(LVL, LFB) | LEVEL(LFB) | P(SNOOP, NONE), /* 0x02: WCB Hit */ + OP_LH | P(LVL, L2) | LEVEL(L2) | P(SNOOP, NONE), /* 0x03: L2 Hit Clean */ + OP_LH | P(LVL, L2) | LEVEL(L2) | P(SNOOP, HIT), /* 0x04: L2 Hit Snoop HI= T */ + OP_LH | P(LVL, L2) | LEVEL(L2) | P(SNOOP, HITM), /* 0x05: L2 Hit Snoop H= it Modified */ + OP_LH | P(LVL, UNC) | LEVEL(NA) | P(SNOOP, NONE), /* 0x06: uncached */ + 0, /* 0x07: Reserved */ + 0, /* 0x08: Reserved */ + 0, /* 0x09: Reserved */ + 0, /* 0x0a: Reserved */ + 0, /* 0x0b: Reserved */ + 0, /* 0x0c: Reserved */ + 0, /* 0x0d: Reserved */ + 0, /* 0x0e: Reserved */ + 0, /* 0x0f: Reserved */ +}; + /* L2 miss */ #define OMR_DATA_SOURCE_MAX 16 static u64 omr_data_source[OMR_DATA_SOURCE_MAX] =3D { @@ -458,6 +493,44 @@ u64 cmt_latency_data(struct perf_event *event, u64 sta= tus) dse.mtl_fwd_blk); } =20 +static u64 arw_latency_data(struct perf_event *event, u64 status) +{ + union intel_x86_pebs_dse dse; + union perf_mem_data_src src; + u64 val; + + dse.val =3D status; + + if (!dse.arw_l2_miss) + val =3D arw_pebs_l2_hit_data_source[dse.arw_dse & 0xf]; + else + val =3D parse_omr_data_source(dse.arw_dse); + + if (!val) + val =3D P(OP, LOAD) | LEVEL(NA) | P(SNOOP, NA); + + if (dse.arw_stlb_miss) + val |=3D P(TLB, MISS) | P(TLB, L2); + else + val |=3D P(TLB, HIT) | P(TLB, L1) | P(TLB, L2); + + if (dse.arw_locked) + val |=3D P(LOCK, LOCKED); + + if (dse.arw_data_blk) + val |=3D P(BLK, DATA); + if (dse.arw_addr_blk) + val |=3D P(BLK, ADDR); + if (!dse.arw_data_blk && !dse.arw_addr_blk) + val |=3D P(BLK, NA); + + src.val =3D val; + if (event->hw.flags & PERF_X86_EVENT_PEBS_ST_HSW) + src.mem_op =3D P(OP, STORE); + + return src.val; +} + static u64 lnc_latency_data(struct perf_event *event, u64 status) { union intel_x86_pebs_dse dse; @@ -551,6 +624,16 @@ u64 pnc_latency_data(struct perf_event *event, u64 sta= tus) return src.val; } =20 +u64 nvl_latency_data(struct perf_event *event, u64 status) +{ + struct x86_hybrid_pmu *pmu =3D hybrid_pmu(event->pmu); + + if (pmu->pmu_type =3D=3D hybrid_small) + return arw_latency_data(event, status); + + return pnc_latency_data(event, status); +} + static u64 load_latency_data(struct perf_event *event, u64 status) { union intel_x86_pebs_dse dse; diff --git a/arch/x86/events/perf_event.h b/arch/x86/events/perf_event.h index cbca1888e8f7..aedc1a7762c2 100644 --- a/arch/x86/events/perf_event.h +++ b/arch/x86/events/perf_event.h @@ -1666,6 +1666,8 @@ u64 arl_h_latency_data(struct perf_event *event, u64 = status); =20 u64 pnc_latency_data(struct perf_event *event, u64 status); =20 +u64 nvl_latency_data(struct perf_event *event, u64 status); + extern struct event_constraint intel_core2_pebs_event_constraints[]; =20 extern struct event_constraint intel_atom_pebs_event_constraints[]; --=20 2.34.1