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=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, 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 10FBCC43603 for ; Wed, 4 Dec 2019 10:47:29 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id D8348207DD for ; Wed, 4 Dec 2019 10:47:28 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D8348207DD Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=nutanix.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:36698 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1icSBr-0003oc-2I for qemu-devel@archiver.kernel.org; Wed, 04 Dec 2019 05:47:27 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:50232) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1icRAw-00016I-Uj for qemu-devel@nongnu.org; Wed, 04 Dec 2019 04:42:29 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1icRAo-00011Z-2L for qemu-devel@nongnu.org; Wed, 04 Dec 2019 04:42:19 -0500 Received: from [192.146.154.1] (port=3936 helo=mcp01.nutanix.com) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1icRAn-0000oC-P5 for qemu-devel@nongnu.org; Wed, 04 Dec 2019 04:42:17 -0500 Received: from ani-devvm.user.nutanix.com (ani-sinha.user.nutanix.com [10.4.194.34]) by mcp01.nutanix.com (Postfix) with ESMTP id E943610074C4; Wed, 4 Dec 2019 09:36:32 +0000 (UTC) From: Ani Sinha To: qemu-devel@nongnu.org Subject: [PATCH] i386: pass CLZERO to guests with EPYC CPU model on AMD ZEN platform Date: Wed, 4 Dec 2019 01:36:30 -0800 Message-Id: <1575452190-105002-1-git-send-email-ani.sinha@nutanix.com> X-Mailer: git-send-email 1.7.1 In-Reply-To: References: X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 192.146.154.1 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Ani Sinha Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" CLZERO CPUID should be passed on to the guests that use EPYC or EPYC-IBPB CPU model when the AMD ZEN based host supports it. This change makes it recognize this CPUID for guests which use EPYC or EPYC-IBPB CPU model. Signed-off-by: Ani Sinha --- target/i386/cpu.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/target/i386/cpu.c b/target/i386/cpu.c index 69f518a..55f0691 100644 --- a/target/i386/cpu.c +++ b/target/i386/cpu.c @@ -3813,6 +3813,8 @@ static X86CPUDefinition builtin_x86_defs[] = { CPUID_EXT3_MISALIGNSSE | CPUID_EXT3_SSE4A | CPUID_EXT3_ABM | CPUID_EXT3_CR8LEG | CPUID_EXT3_SVM | CPUID_EXT3_LAHF_LM | CPUID_EXT3_TOPOEXT, + .features[FEAT_8000_0008_EBX] = + CPUID_8000_0008_EBX_CLZERO, .features[FEAT_7_0_EBX] = CPUID_7_0_EBX_FSGSBASE | CPUID_7_0_EBX_BMI1 | CPUID_7_0_EBX_AVX2 | CPUID_7_0_EBX_SMEP | CPUID_7_0_EBX_BMI2 | CPUID_7_0_EBX_RDSEED | -- 1.9.4