From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 16AF4C433EF for ; Fri, 3 Dec 2021 11:56:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1380629AbhLCL7s (ORCPT ); Fri, 3 Dec 2021 06:59:48 -0500 Received: from wout3-smtp.messagingengine.com ([64.147.123.19]:39913 "EHLO wout3-smtp.messagingengine.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1380634AbhLCL7b (ORCPT ); Fri, 3 Dec 2021 06:59:31 -0500 Received: from compute5.internal (compute5.nyi.internal [10.202.2.45]) by mailout.west.internal (Postfix) with ESMTP id 718773200D18; Fri, 3 Dec 2021 06:56:06 -0500 (EST) Received: from imap44 ([10.202.2.94]) by compute5.internal (MEProxy); Fri, 03 Dec 2021 06:56:07 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=flygoat.com; h= mime-version:message-id:in-reply-to:references:date:from:to:cc :subject:content-type:content-transfer-encoding; s=fm3; bh=P1JnN uOJBaEFcRxzCTmeX1soA0TSx1mKmYgCyg0MaC0=; b=h2ozRM++TDYySVKq6ir9o ixVDLSBihIDC8Fh+BPHH7EZQFQQ89GYA2tTrzWnYxjef0qQaw1dKKjUGh9rhNlb+ X6UmgyWd2XBlqmL+0fCBFeUAxa7XX2PY7lMHdLk9F6qT10Cj1BkgqxGYS5vYUfcS ZzvSLYVr7dQLC1WZA5pf1MrkmijqFMsv7mDj8bVWoCH6SGYsAGlg8HJ/6KcB7NmG 1kiGl3QzhPAbaZjj9WOFNxMYVCTS5nTOy3EFihML1DXo+oRJ2Yh861WpHVdnMPFJ 2aa+BM9OuSXnX2dKKPtbP/nZTOY3XvlbxqS8KgbFS7wH1GMIKej9/ZgFsgrJP4xJ w== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=cc:content-transfer-encoding:content-type :date:from:in-reply-to:message-id:mime-version:references :subject:to:x-me-proxy:x-me-proxy:x-me-sender:x-me-sender :x-sasl-enc; s=fm1; bh=P1JnNuOJBaEFcRxzCTmeX1soA0TSx1mKmYgCyg0Ma C0=; b=gY3fpsSy9a+AXRuPbpBE0t7tEUFOHGZa90si+wggOcZDuTvc2c9M53Ktz 75Oop4TcMEt0E4z62Bl6s1J7m1LEl+bISB6QERPFOp9QYeIE76LNkMeSGx2tJrrL Eys5qi5mR2u7V7WEVAsFaPPAOL3Acb1XPjpV6JSrBdYTzp/kuC9xEfFTPQ6J5er+ OH68Ieln2TDaWADKbCAHoNk7o2n4yZffVhTDyZB4LLHHbe4hApJNv2Fpg99WnZhk VeZzu33oDPYj+jAkxIeDsACX1FlXsbRmiVeHGmK3aoxHBQt5OSIt27GDvwcAABXi KyrFvWNaBXEU1zL5oOsJTRez3qXQA== X-ME-Sender: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgedvuddrieejgdefhecutefuodetggdotefrodftvf curfhrohhfihhlvgemucfhrghsthforghilhdpqfgfvfdpuffrtefokffrpgfnqfghnecu uegrihhlohhuthemuceftddtnecusecvtfgvtghiphhivghnthhsucdlqddutddtmdenuc fjughrpefofgggkfgjfhffhffvufgtgfesthhqredtreerjeenucfhrhhomhepfdflihgr gihunhcujggrnhhgfdcuoehjihgrgihunhdrhigrnhhgsehflhihghhorghtrdgtohhmqe enucggtffrrghtthgvrhhnpeettdejvddvtdfhgfehueejtddttdfgkedtgefhledtkeel fefhhfelledvjeekffenucffohhmrghinhepkhgvrhhnvghlrdhorhhgnecuvehluhhsth gvrhfuihiivgeptdenucfrrghrrghmpehmrghilhhfrhhomhepjhhirgiguhhnrdihrghn ghesfhhlhihgohgrthdrtghomh X-ME-Proxy: Received: by mailuser.nyi.internal (Postfix, from userid 501) id 4ADB6FA0AA6; Fri, 3 Dec 2021 06:56:05 -0500 (EST) X-Mailer: MessagingEngine.com Webmail Interface User-Agent: Cyrus-JMAP/3.5.0-alpha0-4458-g51a91c06b2-fm-20211130.004-g51a91c06 Mime-Version: 1.0 Message-Id: <8aa8ed78-5c78-49c2-b100-607a8f4e8eae@www.fastmail.com> In-Reply-To: References: <20211203003636.11417-1-jiaxun.yang@flygoat.com> <822ced92-f165-3c5a-e0bf-dafa6f808b76@intel.com> <27b6387f-fa93-484e-a56e-12452a82f069@www.fastmail.com> Date: Fri, 03 Dec 2021 11:55:44 +0000 From: "Jiaxun Yang" To: "Borislav Petkov" Cc: "Dave Hansen" , x86@kernel.org, "Thomas Gleixner" , "Ingo Molnar" , dave.hansen@linux.intel.com, hpa@zytor.com, chang.seok.bae@intel.com, linux-kernel@vger.kernel.org Subject: Re: [RFC PATCH 00/10] x86: Allocate AVX512 xstate ondemand Content-Type: text/plain;charset=utf-8 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org =E5=9C=A82021=E5=B9=B412=E6=9C=883=E6=97=A5=E5=8D=81=E4=BA=8C=E6=9C=88 =E4= =B8=8A=E5=8D=8811:51=EF=BC=8CBorislav Petkov=E5=86=99=E9=81=93=EF=BC=9A > On Fri, Dec 03, 2021 at 11:42:10AM +0000, Jiaxun Yang wrote: >> If it's improper I'll drop the statement in commit message :-) > > Actually you should answer his question about what happens if you clear > those two bits in that MSR. It made AVX512 states available in XCR0. I'm still doing some experiments to see if AVX512 is actually enabled by this. Thanks. > > --=20 > Regards/Gruss, > Boris. > > https://people.kernel.org/tglx/notes-about-netiquette --=20 - Jiaxun