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=-2.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 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 53783C38A2A for ; Wed, 6 May 2020 22:36:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 355512075E for ; Wed, 6 May 2020 22:36:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730110AbgEFWgW (ORCPT ); Wed, 6 May 2020 18:36:22 -0400 Received: from mga07.intel.com ([134.134.136.100]:40020 "EHLO mga07.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728888AbgEFWgV (ORCPT ); Wed, 6 May 2020 18:36:21 -0400 IronPort-SDR: OzQKSRujC7NdM9+ZyYcWXmJynDLlEX1kZsyRQmeSMiywssPYeYnU+7jTI/3rkcv+TdSHrC2H5D dBW71jr2Czfw== X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga006.jf.intel.com ([10.7.209.51]) by orsmga105.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 06 May 2020 15:36:20 -0700 IronPort-SDR: KTL5iBbiFdZH4UY6S+FQ5LUbqK9FubQnkneIrMKcelLvVcxRJAZzAwnAo0ZAeLD8JKylMNNlDK Z4QXf/o5xRpg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.73,360,1583222400"; d="scan'208";a="263734037" Received: from mmahler-mobl1.amr.corp.intel.com (HELO [10.254.74.145]) ([10.254.74.145]) by orsmga006.jf.intel.com with ESMTP; 06 May 2020 15:36:18 -0700 Subject: Re: [PATCH 2/2] KVM: SVM: Add support for MPK feature on AMD To: Babu Moger , corbet@lwn.net, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, hpa@zytor.com, pbonzini@redhat.com, sean.j.christopherson@intel.com Cc: x86@kernel.org, vkuznets@redhat.com, wanpengli@tencent.com, jmattson@google.com, joro@8bytes.org, dave.hansen@linux.intel.com, luto@kernel.org, peterz@infradead.org, mchehab+samsung@kernel.org, changbin.du@intel.com, namit@vmware.com, bigeasy@linutronix.de, yang.shi@linux.alibaba.com, asteinhauser@google.com, anshuman.khandual@arm.com, jan.kiszka@siemens.com, akpm@linux-foundation.org, steven.price@arm.com, rppt@linux.vnet.ibm.com, peterx@redhat.com, dan.j.williams@intel.com, arjunroy@google.com, logang@deltatee.com, thellstrom@vmware.com, aarcange@redhat.com, justin.he@arm.com, robin.murphy@arm.com, ira.weiny@intel.com, keescook@chromium.org, jgross@suse.com, andrew.cooper3@citrix.com, pawan.kumar.gupta@linux.intel.com, fenghua.yu@intel.com, vineela.tummalapalli@intel.com, yamada.masahiro@socionext.com, sam@ravnborg.org, acme@redhat.com, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org References: <158880240546.11615.2219410169137148044.stgit@naples-babu.amd.com> <158880254122.11615.156420638099504288.stgit@naples-babu.amd.com> From: Dave Hansen Autocrypt: addr=dave.hansen@intel.com; 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Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.7.0 MIME-Version: 1.0 In-Reply-To: <158880254122.11615.156420638099504288.stgit@naples-babu.amd.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org On 5/6/20 3:02 PM, Babu Moger wrote: > --- a/arch/x86/kvm/svm/svm.c > +++ b/arch/x86/kvm/svm/svm.c > @@ -818,6 +818,10 @@ static __init void svm_set_cpu_caps(void) > if (boot_cpu_has(X86_FEATURE_LS_CFG_SSBD) || > boot_cpu_has(X86_FEATURE_AMD_SSBD)) > kvm_cpu_cap_set(X86_FEATURE_VIRT_SSBD); > + > + /* PKU is not yet implemented for shadow paging. */ > + if (npt_enabled && boot_cpu_has(X86_FEATURE_OSPKE)) > + kvm_cpu_cap_check_and_set(X86_FEATURE_PKU); > } Reviewed-by: Dave Hansen But, I'll also say that we probably shouldn't have put the other code into arch/x86/kvm/vmx/vmx.c in the first place. It would be much nicer if this refactored the current code into a common spot rather than copying. But, I do understand the impulse to do it the way it was done.