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=-9.1 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT 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 7DFC0C43441 for ; Tue, 20 Nov 2018 03:05:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 446A720870 for ; Tue, 20 Nov 2018 03:05:37 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=flygoat.com header.i=@flygoat.com header.b="QqX5L3SX"; dkim=pass (1024-bit key) header.d=flygoat.com header.i=@flygoat.com header.b="XrwvqFl4" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 446A720870 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=flygoat.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731111AbeKTNc2 (ORCPT ); Tue, 20 Nov 2018 08:32:28 -0500 Received: from forward103p.mail.yandex.net ([77.88.28.106]:55791 "EHLO forward103p.mail.yandex.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726559AbeKTNc1 (ORCPT ); Tue, 20 Nov 2018 08:32:27 -0500 X-Greylist: delayed 302 seconds by postgrey-1.27 at vger.kernel.org; Tue, 20 Nov 2018 08:32:26 EST Received: from mxback2o.mail.yandex.net (mxback2o.mail.yandex.net [IPv6:2a02:6b8:0:1a2d::1c]) by forward103p.mail.yandex.net (Yandex) with ESMTP id 40CC021849EB; Tue, 20 Nov 2018 06:00:32 +0300 (MSK) Received: from smtp3p.mail.yandex.net (smtp3p.mail.yandex.net [2a02:6b8:0:1472:2741:0:8b6:8]) by mxback2o.mail.yandex.net (nwsmtp/Yandex) with ESMTP id al9msiIKwS-0V5GA5K0; Tue, 20 Nov 2018 06:00:32 +0300 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=flygoat.com; s=mail; t=1542682832; bh=B2Za9VJ4Qvi/oG5Gy6mKx/fRtEqVqAoZqgSTGcsSXjk=; h=From:To:Cc:Subject:Date:Message-Id; b=QqX5L3SXOchRC+6lLkoNzmroLb3mcBXMfyOQgkjKAB0HCt7tIEA82iPf3YppvACL6 gumyupD9zj1xzwk4lwaqO70B0PYvcTzhU/foj7Fhq2qPLBeX4CQL9uVWkx866jFrpn 2d5MerBawXDJQX4lck3gusLQiaCKAyoeTpxYFGIM= Received: by smtp3p.mail.yandex.net (nwsmtp/Yandex) with ESMTPSA id MRiMKoJiLO-0Q5SxggV; Tue, 20 Nov 2018 06:00:29 +0300 (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client certificate not present) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=flygoat.com; s=mail; t=1542682830; bh=B2Za9VJ4Qvi/oG5Gy6mKx/fRtEqVqAoZqgSTGcsSXjk=; h=From:To:Cc:Subject:Date:Message-Id; b=XrwvqFl4Q/ySKMDafrtZphUfu100ItX6TakaDJNhBAxpXu2j0pR16ubmzwH5hYbY7 t4+yFAjb2n1yy3FwbPLJ1lkPQqKwxq2/Qm/rpraF+zxFCsBRS45Nny+glpn6nqlWSJ v0By+oDf2ffNHbRYvyZaA4d7KWPkTjrGNwhgYTys= Authentication-Results: smtp3p.mail.yandex.net; dkim=pass header.i=@flygoat.com From: Jiaxun Yang To: x86@kernel.org Cc: bp@alien8.de, sherry.hurwitz@amd.com, linux-kernel@vger.kernel.org, Jiaxun Yang , stable@vger.kernel.org Subject: [PATCH v2] x86/cpu/AMD: Fix CPB bit for more processors Date: Tue, 20 Nov 2018 11:00:18 +0800 Message-Id: <20181120030018.5185-1-jiaxun.yang@flygoat.com> X-Mailer: git-send-email 2.19.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org CPUID Fn8000_0007_EDX[CPB] is wrongly 0 on some newer F17h procssors but their revision guide has not been released. For example,Tesed on AMD "Ryzen 7 2700U with Radeon Vega Mobile Gfx" and "AMD Ryzen 5 2500U with Radeon Vega Mobile Gfx", their CPUID Fn0000_0001_EAX is 0x00810f10 and should have CPB feature according AMD product specifications, however their Fn8000_0007_EDX is 0x00006599, indicating they don't support CPB feature. Since whole F17h should support CPB, we set the cap for all of them. Cc: stable@vger.kernel.org Signed-off-by: Jiaxun Yang --- arch/x86/kernel/cpu/amd.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c index eeea634bee0a..37989fa9e620 100644 --- a/arch/x86/kernel/cpu/amd.c +++ b/arch/x86/kernel/cpu/amd.c @@ -818,12 +818,13 @@ static void init_amd_bd(struct cpuinfo_x86 *c) static void init_amd_zn(struct cpuinfo_x86 *c) { set_cpu_cap(c, X86_FEATURE_ZEN); + /* * Fix erratum 1076: CPB feature bit not being set in CPUID. It affects - * all up to and including B1. + * a lot of Family 17h processors and some models are undocumented, since + * whole F17h should support CPB, we set the cap for all of them. */ - if (c->x86_model <= 1 && c->x86_stepping <= 1) - set_cpu_cap(c, X86_FEATURE_CPB); + set_cpu_cap(c, X86_FEATURE_CPB); } static void init_amd(struct cpuinfo_x86 *c) -- 2.19.1