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 X-Spam-Level: X-Spam-Status: No, score=-5.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8A153C48BD1 for ; Fri, 11 Jun 2021 20:27:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 64BC461357 for ; Fri, 11 Jun 2021 20:27:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230450AbhFKU3X (ORCPT ); Fri, 11 Jun 2021 16:29:23 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49184 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229814AbhFKU3W (ORCPT ); Fri, 11 Jun 2021 16:29:22 -0400 Received: from galois.linutronix.de (Galois.linutronix.de [IPv6:2a0a:51c0:0:12e:550::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DEE89C061574 for ; Fri, 11 Jun 2021 13:27:23 -0700 (PDT) From: Thomas Gleixner DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1623443242; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=lF71zDQCkK8xMRQ3oGFHi2IwA2oSbk34KX9t6lqfVa4=; b=YaT/N8WeoD3lHXWFDNfnUuwjDBP+WV51Ga/hb8FwhCL6ot/+gYWlRTKSzEya15Uks0gLNW Fru0Bbe2cBSPgWS0f9E9zIZkVUI6mxlxlYMEW67EulJXUxPgf9EC4TjLOEyydj73eLSj57 Wy2dKX3VqR0VOqfkhJYrZzjcTMF8mvDizgcEuEQ04zFQBpXeAGa5ft2DTUtKRPy5EGJfZb 9tjdYY9il/UhV4YiHNYwGjBtUV9C0mBOK+XZvl+ecWVWbXRlxrW0NY21wbRMVgBWdq5b9B MdNqKpgdMUFnhFh8OQAwhc5G6Z0KnM5wEeDm2jhiryCEflj3BHGK13onz2LMew== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1623443242; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=lF71zDQCkK8xMRQ3oGFHi2IwA2oSbk34KX9t6lqfVa4=; b=lSfY26TtcInofABZGWXPt/4YHo+23S/96714b+Jp3488PbZniT/bIE8rtT4umZsM2U2bQZ O3dGk3tHLC96qMBQ== To: Andy Lutomirski , LKML Cc: Dave Hansen , Fenghua Yu , Tony Luck , Yu-cheng Yu , Sebastian Andrzej Siewior , Borislav Petkov , Peter Zijlstra , Kan Liang Subject: Re: [patch 08/41] x86/fpu: Restrict fpstate sanitizing to legacy components In-Reply-To: <2be2ef6c-fcb8-46cf-976c-2b3a9537b660@kernel.org> References: <20210611161523.508908024@linutronix.de> <20210611163111.820639606@linutronix.de> <2be2ef6c-fcb8-46cf-976c-2b3a9537b660@kernel.org> Date: Fri, 11 Jun 2021 22:27:22 +0200 Message-ID: <87h7i4w3it.ffs@nanos.tec.linutronix.de> MIME-Version: 1.0 Content-Type: text/plain Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Jun 11 2021 at 12:03, Andy Lutomirski wrote: > On 6/11/21 9:15 AM, Thomas Gleixner wrote: >> xstateregs_get() does not longer use fpstate_sanitize_xstate() and the only >> +/* >> + * When executing XSAVEOPT (or other optimized XSAVE instructions), if > > The kernel doesn't use XSAVEOPT any more. How about: You sure? #define XSTATE_XSAVE(st, lmask, hmask, err) \ asm volatile(ALTERNATIVE_2(XSAVE, \ XSAVEOPT, X86_FEATURE_XSAVEOPT, \ XSAVES, X86_FEATURE_XSAVES) \ Thanks, tglx