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=-10.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=unavailable 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 4C368C433E0 for ; Mon, 8 Feb 2021 12:43:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 01CE064E7E for ; Mon, 8 Feb 2021 12:43:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232447AbhBHMne (ORCPT ); Mon, 8 Feb 2021 07:43:34 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47674 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231996AbhBHMlR (ORCPT ); Mon, 8 Feb 2021 07:41:17 -0500 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 07AA9C061788; Mon, 8 Feb 2021 04:40:33 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=QYHzFu7RFjTlSdRSBJft/6IvHdnl3ucwkIIGdwOHaTI=; b=M6Vbj529/FrUUsDCBH3YO2zH/I 2uguc/8aT2Ymw7wv+8quB5S/whXFbGzgoXuWAqIjd7EYl3R3bRlBeIFPvol8vYs5wTKSl8akTxHkC c3bbUNTzqFHA0luYYL2J8ImQEUZYg07IgPKM5XygZpPevys2G99uDtRaZwNygya08nVzHnUsKpBxs fhteJcW44UUXqMCl6EdoXsucxW6mxt9LJ64iLvcB10YyLhERtLRpcZX+6WoeWuMTQGdMGMJ6j1eCs WY4M2U6QPjdjcB/oO+OjdbFBRVA3n/PsFJnoZJGbxCsRlC2PewFOhZVVjjAzd041+3a6v4Q2syrD8 vwowdcOA==; Received: from j217100.upc-j.chello.nl ([24.132.217.100] helo=noisy.programming.kicks-ass.net) by casper.infradead.org with esmtpsa (Exim 4.94 #2 (Red Hat Linux)) id 1l95pj-005xx7-8Y; Mon, 08 Feb 2021 12:40:04 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id 4D9BE3010D2; Mon, 8 Feb 2021 13:40:02 +0100 (CET) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 1000) id 34C5F20D8A013; Mon, 8 Feb 2021 13:40:02 +0100 (CET) Date: Mon, 8 Feb 2021 13:40:02 +0100 From: Peter Zijlstra To: Jim Mattson Cc: linux-kernel@vger.kernel.org, x86@kernel.org, kvm@vger.kernel.org, pbonzini@redhat.com, Andi Kleen , Ingo Molnar , Arnaldo Carvalho de Melo , Mark Rutland , Alexander Shishkin , Jiri Olsa , Namhyung Kim , Thomas Gleixner , Borislav Petkov , "H. Peter Anvin" Subject: Re: [PATCH RESEND] perf/x86/kvm: Add Cascade Lake Xeon steppings to isolation_ucodes[] Message-ID: References: <20210205191324.2889006-1-jmattson@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20210205191324.2889006-1-jmattson@google.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Feb 05, 2021 at 11:13:24AM -0800, Jim Mattson wrote: > Cascade Lake Xeon parts have the same model number as Skylake Xeon > parts, so they are tagged with the intel_pebs_isolation > quirk. However, as with Skylake Xeon H0 stepping parts, the PEBS > isolation issue is fixed in all microcode versions. > > Add the Cascade Lake Xeon steppings (5, 6, and 7) to the > isolation_ucodes[] table so that these parts benefit from Andi's > optimization in commit 9b545c04abd4f ("perf/x86/kvm: Avoid unnecessary > work in guest filtering"). > > Signed-off-by: Jim Mattson Thanks!