From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.16]) (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 DFCAE32937A; Tue, 14 Jul 2026 05:28:10 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.16 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784006893; cv=none; b=d2kWEGXaJlCHdHCOR0LRZY0ktZO3gzAN0QMEjw0riylfQhAfi1FIwJdHP2eXwqpfMDxOfEhzZcPVXpGKW1BAxjl9CqmoM1MYza7hUsusgiG1sBuYvFy10oU6EqTPlvuItNQlizvqI94AT3q9nDSPJQfWZ9cDcN9RfHDY5MJOQB4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784006893; c=relaxed/simple; bh=rxF2ZPwEcLUjmzWN7LNbEAcEr6iY437bDdZ5V2zlGXc=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=s+H9tv+QOPHyaqqugGBrxpO+MH5kjCdz+siF1/edakXLTefvgCg0k8FDR0+gz0eBzzStggw6IKOzMXkeKFgDREJxRzJuUgm0+9Xg+1UXHU/8qsJz8rGOgDSenk2tiQm7a8i/Q4MekFG+gU9J2iYuu1EBtX1vlakxAuuZWsHlbgc= 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=VQEWDDHa; arc=none smtp.client-ip=192.198.163.16 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="VQEWDDHa" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1784006891; x=1815542891; h=message-id:date:mime-version:subject:to:cc:references: from:in-reply-to:content-transfer-encoding; bh=rxF2ZPwEcLUjmzWN7LNbEAcEr6iY437bDdZ5V2zlGXc=; b=VQEWDDHaRb54CX3fR7XVU4RIjMwkHPfygG9dma0TY4Z40nH+rXGVEcV5 ag60gOmsOPdR+bRpncfWD0jU0LywcylCEPhUJ2gq/BKigs9gwRDc0jvx7 KMFlN5F75uuR+nFXgeyrSuNDTh9YEoB9uiW+hqW+Z4VLaYJUvNVA2+YN7 q7cFv/2usxoX87nMvNgfjaULUzyOyf7DPH6o2erpXz2nHvDWE41vA1U/e y0bt25xdBSbzUnMEb5Ee/fzbuqTXzIvnWIykWBaFM3K/nMAWXl94kgWqV YPUuXxZWLVgI56L8jsW8L/Ne18h8KciABbKWMg3QHLN2x3XZZirM7Pmwq g==; X-CSE-ConnectionGUID: dviGjtIxQ0m6hOIbtdT8Wg== X-CSE-MsgGUID: 0mNwamEQQfSUb5uzop8z/w== X-IronPort-AV: E=McAfee;i="6800,10657,11846"; a="72144969" X-IronPort-AV: E=Sophos;i="6.25,163,1779174000"; d="scan'208";a="72144969" Received: from fmviesa007.fm.intel.com ([10.60.135.147]) by fmvoesa110.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 13 Jul 2026 22:28:10 -0700 X-CSE-ConnectionGUID: d+pV0auzSfOYukVkVHSpkQ== X-CSE-MsgGUID: ljJkCMdJSj2Waq34yefq2g== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.25,163,1779174000"; d="scan'208";a="252366307" Received: from unknown (HELO [10.238.3.181]) ([10.238.3.181]) by fmviesa007-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 13 Jul 2026 22:28:07 -0700 Message-ID: Date: Tue, 14 Jul 2026 13:28:05 +0800 Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v6 8/8] KVM: selftests: Add PERF_METRICS and fixed counter 3 tests To: Jim Mattson Cc: Zide Chen , Sean Christopherson , Paolo Bonzini , kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Mingwei Zhang , Das Sandipan , Shukla Manali , Falcon Thomas , Xudong Hao References: <20260629231938.15129-1-zide.chen@intel.com> <20260629231938.15129-9-zide.chen@intel.com> <32a1e1d2-c437-4cd1-8455-43fa9082cb50@linux.intel.com> <5760cb18-739c-4907-b582-60933d11a72d@linux.intel.com> <212b058b-5804-4a00-a95a-67f58546fd9a@linux.intel.com> Content-Language: en-US From: "Mi, Dapeng" In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit On 7/14/2026 1:11 PM, Jim Mattson wrote: > On Mon, Jul 13, 2026 at 12:12 AM Mi, Dapeng wrote: > >> rdpmc is the preferable way to read PMU counters since the better >> performance than rdmsr, and most of current code regardless of kernel or >> user-space already use rdpmc to read PMC counters. If we set the rdpmc to >> interception by default, then it may cause extra performance hit. >> >> Currently I didn't hear there is any plan to extend the rdpmc to support >> more types for Intel platforms ... > Is Intel willing to commit to that? I'm afraid not. :(  rdpmc is still possible to be extended to support more types in the future, but recently we don't see such requirements.