From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.11]) (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 24A2636D503; Fri, 5 Jun 2026 01:17:17 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.11 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780622243; cv=none; b=ftz+2lqyt2tc27Pgi60wPDeSKVIfrXwEklyxLYRHinUHTKxHUj0YsPAQkovFaEN7KTYuuDmkgwvUu4Fe9omkwKeH4A4ADX+QPe7ZTFpYbbGZzDiTmH6g5sHxzBGm0CO6jz/cDOoYb3BnUHtrBejppiHH5sLZwxviVRYkfW44iAc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780622243; c=relaxed/simple; bh=d9C2tn7l7TBWtBWscp2bFWf2Su8H/WG01jblldosi9I=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=rYQEDT64b6Soq36eIyOOibSqt5n6gFp0rw4dBk5A4amps2hknkxRBKLxllq/RnIBAvJPDYk9xkp/Iq3pKxgWnt/XkxWS4kz5A8WuGne3IcJJlPH2QH+WCkdX0NYDf+7AroxhMZECxnFLYMey07AfsmnFHwhRqTwd80S+u1w1z/Y= 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=VPg8Gpmq; arc=none smtp.client-ip=198.175.65.11 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="VPg8Gpmq" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1780622237; x=1812158237; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=d9C2tn7l7TBWtBWscp2bFWf2Su8H/WG01jblldosi9I=; b=VPg8GpmqmNq8llkFPlzwdQMTqkvelORc8Us3eO0tLFBluFD7I4jeKkmj PAUhg8PEqMbyTSxsLmpM0SXiDV6WJHgH8t/Mq5PiZEfkzuQYCsHCuqCZf anbH0ohOi54XwafQJTv/C0xndcKCyDPm8y8bcZwhFb7rq4+O85NuCAdkP l76VX4eyOL1Ja4DK2bGtiNnHRTx2Q1jXV0vrTt/z8RAuSB17TpHtUk/Qw TjMUKzeIyJ9x8hhOyPB+NdHLUc13PSk4gD6Hy6sKnHDxi++xZoCFgSF6s PcAqZvEDNrgNYkoSLXzdROlWi1w7kotYDr2p3g4dIdL6E/MFrspnr1fe3 g==; X-CSE-ConnectionGUID: DIzXqmfkTLiliSL6JCsPrQ== X-CSE-MsgGUID: wIvn/tOwSMa01M+oqJWC/Q== X-IronPort-AV: E=McAfee;i="6800,10657,11807"; a="91772213" X-IronPort-AV: E=Sophos;i="6.24,188,1774335600"; d="scan'208";a="91772213" Received: from orviesa007.jf.intel.com ([10.64.159.147]) by orvoesa103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 04 Jun 2026 18:17:16 -0700 X-CSE-ConnectionGUID: lJ/qi7pzTHqOdI7qfLU6aw== X-CSE-MsgGUID: xK01CeQFTGiPTFvxy4FOQQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.24,188,1774335600"; d="scan'208";a="244817163" Received: from spr.sh.intel.com ([10.112.230.239]) by orviesa007.jf.intel.com with ESMTP; 04 Jun 2026 18:17:13 -0700 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 , Yi Lai Subject: [PATCH 7/8] perf/x86/intel: Drop fixed-counter PEBS constraints for baseline PEBS Date: Fri, 5 Jun 2026 09:11:35 +0800 Message-Id: <20260605011136.2043393-8-dapeng1.mi@linux.intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260605011136.2043393-1-dapeng1.mi@linux.intel.com> References: <20260605011136.2043393-1-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: 8bit On SPR guests where pebs_baseline is not advertised, running: $ ./perf record -e cpu/event=0x00,umask=0x01,i\ name=INST_RETIRED.PREC_DIST/p -c 10000 sleep 1 can trigger: unchecked MSR access error: WRMSR to 0x3f1 ... in\ intel_pmu_pebs_enable_all() Root cause: SPR-specific PEBS constraints allow fixed-counter scheduling, for example INST_RETIRED.PREC_DIST on fixed counter 0. In guests without pebs_baseline, KVM does not support PEBS sampling on fixed counters, so enabling such events reaches an invalid MSR programming path. Fix: Drop fixed-counter entries from the PEBS constraint table. Without pebs_baseline, those fixed-counter PEBS events now resolve to empty constraints and are not scheduled/enabled, avoiding the warning and the broken guest PEBS path. This is safe because, in pebs_baseline-capable cases, PEBS constraint lookup already falls back to non-PEBS constraints when needed, and fixed-counter constraints are effectively shared there. Reported-by: Yi Lai Signed-off-by: Dapeng Mi --- arch/x86/events/intel/ds.c | 13 ------------- 1 file changed, 13 deletions(-) diff --git a/arch/x86/events/intel/ds.c b/arch/x86/events/intel/ds.c index cb72af9b61ce..5db15a92017a 100644 --- a/arch/x86/events/intel/ds.c +++ b/arch/x86/events/intel/ds.c @@ -1447,10 +1447,6 @@ struct event_constraint intel_skl_pebs_event_constraints[] = { }; struct event_constraint intel_icl_pebs_event_constraints[] = { - INTEL_FLAGS_UEVENT_CONSTRAINT(0x01c0, 0x100000000ULL), /* old INST_RETIRED.PREC_DIST */ - INTEL_FLAGS_UEVENT_CONSTRAINT(0x0100, 0x100000000ULL), /* INST_RETIRED.PREC_DIST */ - INTEL_FLAGS_UEVENT_CONSTRAINT(0x0400, 0x800000000ULL), /* SLOTS */ - INTEL_PLD_CONSTRAINT(0x1cd, 0xff), /* MEM_TRANS_RETIRED.LOAD_LATENCY */ INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_LD(0x11d0, 0xf), /* MEM_INST_RETIRED.STLB_MISS_LOADS */ INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_ST(0x12d0, 0xf), /* MEM_INST_RETIRED.STLB_MISS_STORES */ @@ -1473,9 +1469,6 @@ struct event_constraint intel_icl_pebs_event_constraints[] = { }; struct event_constraint intel_glc_pebs_event_constraints[] = { - INTEL_FLAGS_UEVENT_CONSTRAINT(0x100, 0x100000000ULL), /* INST_RETIRED.PREC_DIST */ - INTEL_FLAGS_UEVENT_CONSTRAINT(0x0400, 0x800000000ULL), - INTEL_FLAGS_EVENT_CONSTRAINT(0xc0, 0xfe), INTEL_PLD_CONSTRAINT(0x1cd, 0xfe), INTEL_PSD_CONSTRAINT(0x2cd, 0x1), @@ -1500,9 +1493,6 @@ struct event_constraint intel_glc_pebs_event_constraints[] = { }; struct event_constraint intel_lnc_pebs_event_constraints[] = { - INTEL_FLAGS_UEVENT_CONSTRAINT(0x100, 0x100000000ULL), /* INST_RETIRED.PREC_DIST */ - INTEL_FLAGS_UEVENT_CONSTRAINT(0x0400, 0x800000000ULL), - INTEL_FLAGS_UEVENT_CONSTRAINT(0x012a, 0x1), /* OCR.* events */ INTEL_FLAGS_UEVENT_CONSTRAINT(0x012b, 0x1), /* OCR.* events */ @@ -1534,9 +1524,6 @@ struct event_constraint intel_lnc_pebs_event_constraints[] = { }; struct event_constraint intel_pnc_pebs_event_constraints[] = { - INTEL_FLAGS_UEVENT_CONSTRAINT(0x100, 0x100000000ULL), /* INST_RETIRED.PREC_DIST */ - INTEL_FLAGS_UEVENT_CONSTRAINT(0x0400, 0x800000000ULL), - INTEL_HYBRID_LDLAT_CONSTRAINT(0x1cd, 0xfc), INTEL_HYBRID_STLAT_CONSTRAINT(0x2cd, 0x3), INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_LD(0x11d0, 0xf), /* MEM_INST_RETIRED.STLB_MISS_LOADS */ -- 2.34.1