From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.17]) (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 C2E142260A; Wed, 17 Apr 2024 03:37:43 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.17 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1713325065; cv=none; b=GhhFiRZgEYI5dtPsoFGqDHVkGwI3cG3BiznQFkQ4Z+Mxl/cEunFguDKOKYiTQjNeZCGjk1XwvWvMWHbBN8PHKt26BC3oLUF5iyubmExOhGaq+228xG9gLHZt6mnRv+26sxdLOnGpIHk1IzUKKA18kuZkr26HUW0m+qs+1DXAGf8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1713325065; c=relaxed/simple; bh=00HJtH0QWrCENAFZgWCzA9lQHeGivlTimNrmNg+L6yU=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=Hy17a+VZNUoRtN/eqarGb7RLLScnlX89HsYZI7GNsbBez9y/VdHts1kY9Qtjm3EzHgRzt4wZvl6iAiLBuAVhZ5Ram8RW+maVTHtkRiFCNGzwpo6otRsJkiBsiSK/h8/dDzsg9ZSJCv1UVaE+12icoMq0CMlXluqJKcE4cnhalIQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=AtvX+FHj; arc=none smtp.client-ip=192.198.163.17 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="AtvX+FHj" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1713325064; x=1744861064; h=message-id:date:mime-version:subject:to:cc:references: from:in-reply-to:content-transfer-encoding; bh=00HJtH0QWrCENAFZgWCzA9lQHeGivlTimNrmNg+L6yU=; b=AtvX+FHjTpbd+w4ZVrm4IiGURpLrspuw36qLGDgVFWvQN4xd2Rucw4w7 btJzxouTnbcrst8xHm9dEuWhX8K8VeRX81x5VKYboBJMr8035smrx6ELE 65jH7rvsiCfF0GYIsWGunclZYhUS2WTX/r5r8L7a5CJNniHlhnsKgnYZa yvDuJtsvdNUshrW0mCYexvoLSkYBW3NB3CemyZsYEvdGC2ZYLoHXxDRBO SuzOEaz9dCfU8OZ8lSVpxWQPVlGaw4Lb3OcqijOW1fywH5nnGxSBPinzw Sv/Pnu6XuLh/rn/PJi1ZQYt7ipEkLRVcKWQanBNtvDdYmjN7Zm0xpLoe7 Q==; X-CSE-ConnectionGUID: oXe97HuOTuK1SXv3a2RmZg== X-CSE-MsgGUID: wIL6GU5BRzKrBt/ZS6KnBw== X-IronPort-AV: E=McAfee;i="6600,9927,11046"; a="8659938" X-IronPort-AV: E=Sophos;i="6.07,208,1708416000"; d="scan'208";a="8659938" Received: from orviesa002.jf.intel.com ([10.64.159.142]) by fmvoesa111.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 16 Apr 2024 20:37:43 -0700 X-CSE-ConnectionGUID: 7Lv2mrblQ367wKv/S6Z1TA== X-CSE-MsgGUID: +DJGUsdbQWOmCJVdobaxlA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.07,208,1708416000"; d="scan'208";a="53452059" Received: from xiaoyaol-hp-g830.ccr.corp.intel.com (HELO [10.124.238.14]) ([10.124.238.14]) by orviesa002-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 16 Apr 2024 20:37:39 -0700 Message-ID: <1e26b405-f382-45f4-9dd5-3ea5db68302a@intel.com> Date: Wed, 17 Apr 2024 11:37:37 +0800 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH V4 3/4] KVM: x86: Add a capability to configure bus frequency for APIC timer To: Reinette Chatre , isaku.yamahata@intel.com, pbonzini@redhat.com, erdemaktas@google.com, vkuznets@redhat.com, seanjc@google.com, vannapurve@google.com, jmattson@google.com, mlevitsk@redhat.com, chao.gao@intel.com, rick.p.edgecombe@intel.com Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org References: <6146ef9f9e5a17a1940b0efb571c5143b0e9ef8f.1711035400.git.reinette.chatre@intel.com> Content-Language: en-US From: Xiaoyao Li In-Reply-To: <6146ef9f9e5a17a1940b0efb571c5143b0e9ef8f.1711035400.git.reinette.chatre@intel.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 3/22/2024 12:37 AM, Reinette Chatre wrote: ... > diff --git a/Documentation/virt/kvm/api.rst b/Documentation/virt/kvm/api.rst > index 0b5a33ee71ee..20080fe4b8ee 100644 > --- a/Documentation/virt/kvm/api.rst > +++ b/Documentation/virt/kvm/api.rst > @@ -8063,6 +8063,23 @@ error/annotated fault. > > See KVM_EXIT_MEMORY_FAULT for more information. > > +7.35 KVM_CAP_X86_APIC_BUS_FREQUENCY As sean mentioned it previous comment, I would be the one prefers KVM_CAP_X86_APIC_BUS_CYCLES_NS Depending on whether people get hung up on nanoseconds not being a "frequency", either KVM_CAP_X86_APIC_BUS_FREQUENCY or KVM_CAP_X86_APIC_BUS_CYCLES_NS.