From nobody Sun Feb 8 05:26:55 2026 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.10]) (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 57D902853F7; Tue, 6 May 2025 16:48:14 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.10 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746550095; cv=none; b=oO6GeCl2XLMIOSG5dZ0zaFsziWcRW0otYsOAxznmjQhEQR/LdSRy39rMmYfZORen8PisNUHh+oTJDjBsGhqQCjoDk4CPu5TVUJ51CMHyngQoA5DdNGp2+RqQugLJkx7v+06NbROEvLEE03RlaO/2ui1IDrxkRIqCNG0WVNdTmMA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746550095; c=relaxed/simple; bh=RMEehrWYnmEORlN8I5Spw4Yog1jSoilWyq1ppX1bKEc=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=ke8SVwQ9c8y9lPuPhXvmLyHoH8gx2W0Xzqecm4Pg6DmGtc3zqP9Pd2mTWh2jSe2BJ3wknjSYk263YENsh0mi8pdwvhI5wtKI5xIrl+BNGVSMXcCnleS5jcRYzNILLm1SRltUO74nUiBCtSA8/b4LsydBdf4sTEIlbvr+ddMVHUQ= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com; spf=none smtp.mailfrom=linux.intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=Lv+DAO+O; arc=none smtp.client-ip=192.198.163.10 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; spf=none 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="Lv+DAO+O" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1746550094; x=1778086094; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=RMEehrWYnmEORlN8I5Spw4Yog1jSoilWyq1ppX1bKEc=; b=Lv+DAO+OCoFn45r4VUnPpYy8Xy6T3RZkPXRncj0l7pu0IT5nprNuBAN4 lK2PY/SdVxCJs7uZnkWTid5hU8XplOmHRFsWsH5lSCPz5kM8zCJRUtKUY pJsM0x/zAiJn4KzdUnG2nSoHDzetMngal8cnWpDBXCPE4W8MjA6iQpK9V 3SSwHrOeg8q3SCVl51qexuU+5DqgJIA7zIxIsiypQ5ou8bqiTo0f/cL+d gdapDYaz0vPbaxRsTkyp28eAMyLEy3eF3U7QqkR6jLXHpg2yD4+sT1k+6 adNdBe7GG3gYmeS6e3SqfPKmQYRLV3i6SR2dI+ci9hy114RPapi55KTF4 A==; X-CSE-ConnectionGUID: k4qxrZsXSwOQaPd85FVpeQ== X-CSE-MsgGUID: y2Fy/EhsQ3qshUBqyEqRFA== X-IronPort-AV: E=McAfee;i="6700,10204,11425"; a="59595238" X-IronPort-AV: E=Sophos;i="6.15,266,1739865600"; d="scan'208";a="59595238" Received: from fmviesa007.fm.intel.com ([10.60.135.147]) by fmvoesa104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 06 May 2025 09:48:13 -0700 X-CSE-ConnectionGUID: BT+lBUeSQzumpL83ImWCeQ== X-CSE-MsgGUID: ul4nINe+TZ6rCAqW1RSGxg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.15,266,1739865600"; d="scan'208";a="135674849" Received: from kanliang-dev.jf.intel.com ([10.165.154.102]) by fmviesa007.fm.intel.com with ESMTP; 06 May 2025 09:48:12 -0700 From: kan.liang@linux.intel.com To: peterz@infradead.org, mingo@redhat.com, namhyung@kernel.org, irogers@google.com, mark.rutland@arm.com, linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org Cc: eranian@google.com, ctshao@google.com, tmricht@linux.ibm.com, Kan Liang , Sandipan Das , Ravi Bangoria Subject: [RFC PATCH 03/15] perf/x86/amd: Remove driver-specific throttle support Date: Tue, 6 May 2025 09:47:28 -0700 Message-Id: <20250506164740.1317237-4-kan.liang@linux.intel.com> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20250506164740.1317237-1-kan.liang@linux.intel.com> References: <20250506164740.1317237-1-kan.liang@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" From: Kan Liang The throttle support has been added in the generic code. Remove the driver-specific throttle support. Besides the throttle, perf_event_overflow may return true because of event_limit. It already does an inatomic event disable. The pmu->stop is not required either. Signed-off-by: Kan Liang Cc: Sandipan Das Cc: Ravi Bangoria Reviewed-by: Ravi Bangoria --- arch/x86/events/amd/core.c | 3 +-- arch/x86/events/amd/ibs.c | 4 +--- 2 files changed, 2 insertions(+), 5 deletions(-) diff --git a/arch/x86/events/amd/core.c b/arch/x86/events/amd/core.c index 30d6ceb4c8ad..5e64283b9bf2 100644 --- a/arch/x86/events/amd/core.c +++ b/arch/x86/events/amd/core.c @@ -1003,8 +1003,7 @@ static int amd_pmu_v2_handle_irq(struct pt_regs *regs) =20 perf_sample_save_brstack(&data, event, &cpuc->lbr_stack, NULL); =20 - if (perf_event_overflow(event, &data, regs)) - x86_pmu_stop(event, 0); + perf_event_overflow(event, &data, regs); } =20 /* diff --git a/arch/x86/events/amd/ibs.c b/arch/x86/events/amd/ibs.c index 0252b7ea8bca..4bbbca02aeb1 100644 --- a/arch/x86/events/amd/ibs.c +++ b/arch/x86/events/amd/ibs.c @@ -1373,9 +1373,7 @@ static int perf_ibs_handle_irq(struct perf_ibs *perf_= ibs, struct pt_regs *iregs) hwc->sample_period =3D perf_ibs->min_period; =20 out: - if (throttle) { - perf_ibs_stop(event, 0); - } else { + if (!throttle) { if (perf_ibs =3D=3D &perf_ibs_op) { if (ibs_caps & IBS_CAPS_OPCNTEXT) { new_config =3D period & IBS_OP_MAX_CNT_EXT_MASK; --=20 2.38.1