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=-2.6 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS, USER_AGENT_MUTT autolearn=ham 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 C4405C43381 for ; Mon, 1 Apr 2019 07:33:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9116C2084B for ; Mon, 1 Apr 2019 07:33:59 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=alien8.de header.i=@alien8.de header.b="onhSgohJ" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731954AbfDAHd5 (ORCPT ); Mon, 1 Apr 2019 03:33:57 -0400 Received: from mail.skyhub.de ([5.9.137.197]:43622 "EHLO mail.skyhub.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731769AbfDAHd5 (ORCPT ); Mon, 1 Apr 2019 03:33:57 -0400 Received: from zn.tnic (p200300EC2F148A00329C23FFFEA6A903.dip0.t-ipconnect.de [IPv6:2003:ec:2f14:8a00:329c:23ff:fea6:a903]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.skyhub.de (SuperMail on ZX Spectrum 128k) with ESMTPSA id 3FBC51EC0513; Mon, 1 Apr 2019 09:33:56 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=alien8.de; s=dkim; t=1554104036; 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: content-transfer-encoding:in-reply-to:in-reply-to: references:references; bh=hP9z8VlxNzLS3/m2BPGouN7sjj0YetwZbwiqw5sawM0=; b=onhSgohJfJAw4CFGo4egXt1hw1mJ0XJDLTTj1AWE5SaFWfvk+Re66fEWgF7KGGR3bDO/d2 GZjoy4N6EFp6NG5Ad6TxjI99CIIT8aDJGKMXx5evfbsxbqHI4OMqBQGPvh5cacdlrvV1lj IBdScFWEuxC8buPXz0Htp4FbVnIzUuk= Date: Mon, 1 Apr 2019 09:33:52 +0200 From: Borislav Petkov To: Paolo Bonzini Cc: LKML , Nadav Amit , Andy Lutomirski , Peter Zijlstra , "H. Peter Anvin" , Ingo Molnar , Joerg Roedel , kvm@vger.kernel.org, Radim =?utf-8?B?S3LEjW3DocWZ?= , Thomas Gleixner , x86@kernel.org Subject: Re: [PATCH 3/5] x86/kvm: Convert some slow-path static_cpu_has() callers to boot_cpu_has() Message-ID: <20190401073352.GB28264@zn.tnic> References: <20190330112022.28888-1-bp@alien8.de> <20190330112022.28888-4-bp@alien8.de> <2f71cb35-46b2-9ed5-28b3-c6eb5e647b46@redhat.com> <20190331151248.GB15073@zn.tnic> <86dc0d5c-88af-dddc-4618-1a0a5a545e5f@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <86dc0d5c-88af-dddc-4618-1a0a5a545e5f@redhat.com> User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Apr 01, 2019 at 09:24:06AM +0200, Paolo Bonzini wrote: > The MSR reads and writes are not done in the common case. Also, you > cannot really expect boot_cpu_data to be in L1 in these functions since > they run after the guest---or if they do, each L1 line you fill in with > host data is one line you "steal" from the guest. Ok, fair enough. I'll drop this patch. -- Regards/Gruss, Boris. Good mailing practices for 400: avoid top-posting and trim the reply.