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=-12.9 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 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 7460EC433E0 for ; Fri, 5 Feb 2021 09:30:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2F70B64FBF for ; Fri, 5 Feb 2021 09:30:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230365AbhBEJaf (ORCPT ); Fri, 5 Feb 2021 04:30:35 -0500 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:38292 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229756AbhBEJ13 (ORCPT ); Fri, 5 Feb 2021 04:27:29 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1612517162; 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:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=Nlcu3cb2XGllXsJ4Cjn3h9VHrxoAGbuybTGAlLoG1zc=; b=OcwT8/10DsKddXyMm1ZcgOVCAOmLzOi/1mxDadsdjc1sMI/oyOF9qjR/li8oF6UyH8hm63 j1kj9mjza8BEcrW8PLor6rq2DWOtYrFGIeNn+EVbuLsf7+7J5KLTTqGPHbXoa7jT6LH578 m6GPfNmCnuC1OU43eMnVI5hgmpq0ktY= Received: from mail-ed1-f70.google.com (mail-ed1-f70.google.com [209.85.208.70]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-185-w1MJ0ANXPBuvevhbGOCutg-1; Fri, 05 Feb 2021 04:26:01 -0500 X-MC-Unique: w1MJ0ANXPBuvevhbGOCutg-1 Received: by mail-ed1-f70.google.com with SMTP id bd22so6574462edb.4 for ; Fri, 05 Feb 2021 01:25:59 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:cc:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=Nlcu3cb2XGllXsJ4Cjn3h9VHrxoAGbuybTGAlLoG1zc=; b=DdGeAoJWtryj93oBGzhkIj+MBFKkNDnQ5Smyu5OUZ5i1lbQuUZM+wdlQY/CRiCPk4e TfxaVP5xtpVrFE/TYhr72dZRMXw3auADQw0u+Pf7gafXZlHlsgfzQ1RZOnHgDV6cs5rS mJWKdCVFPronm3m+MJwB2zFjtO6461j5XpmlPm9BHXSNadCLNeZwlsk0M4JdQG2zGmQ2 b19MOGkRiFw9HBl8jnXh2DrQqP4un6C6SbNUXee2nwpDdG0sDTvXyIMnb1ERfaLfOGh9 93Tl8BZTT2q0gxZJOE5L9haQgJ3rL03sgvQPATdhxukHB9SBDKjR0/Ell3ANpYNlUgF/ wDPA== X-Gm-Message-State: AOAM530TgvxjbQmGSgBqjdeXAvP8YB7NLkMQFytAd2+z5Kmz0P93lj7p o67a8xcO3C0N8JWyvQ2EVei0FxS6RJ/jfWJ/RJS7PLZQcMyIxzA99Jwo2ebgOr+Ve+x6x+zWzM7 9OF6AmHzyHNcp6DXIzGDqYf7G X-Received: by 2002:aa7:d696:: with SMTP id d22mr2625248edr.361.1612517159045; Fri, 05 Feb 2021 01:25:59 -0800 (PST) X-Google-Smtp-Source: ABdhPJyBCgt1agj4Ikw/q7k012mueayWYguXKrdYnw9gpDmCVHElctmRa2drVchzijXjwZpd0XUn5A== X-Received: by 2002:aa7:d696:: with SMTP id d22mr2625239edr.361.1612517158898; Fri, 05 Feb 2021 01:25:58 -0800 (PST) Received: from ?IPv6:2001:b07:6468:f312:c8dd:75d4:99ab:290a? ([2001:b07:6468:f312:c8dd:75d4:99ab:290a]) by smtp.gmail.com with ESMTPSA id u18sm3680337ejc.76.2021.02.05.01.25.48 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 05 Feb 2021 01:25:58 -0800 (PST) Subject: Re: [PATCH v4 2/5] KVM: X86: Expose PKS to guest To: Chenyi Qiang , Sean Christopherson , Vitaly Kuznetsov , Wanpeng Li , Jim Mattson , Joerg Roedel , Xiaoyao Li Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org, "x86@kernel.org" , Andy Lutomirski , Borislav Petkov References: <20210205083706.14146-1-chenyi.qiang@intel.com> <20210205083706.14146-3-chenyi.qiang@intel.com> From: Paolo Bonzini Message-ID: <8768ad06-e051-250d-93ec-fa4d684bc7b0@redhat.com> Date: Fri, 5 Feb 2021 10:25:48 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.6.0 MIME-Version: 1.0 In-Reply-To: <20210205083706.14146-3-chenyi.qiang@intel.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 05/02/21 09:37, Chenyi Qiang wrote: > > diff --git a/arch/x86/mm/pkeys.c b/arch/x86/mm/pkeys.c > index 57718716cc70..8027f854c600 100644 > --- a/arch/x86/mm/pkeys.c > +++ b/arch/x86/mm/pkeys.c > @@ -390,3 +390,9 @@ void pks_key_free(int pkey) > __clear_bit(pkey, &pks_key_allocation_map); > } > EXPORT_SYMBOL_GPL(pks_key_free); > + > +u32 get_current_pkrs(void) > +{ > + return this_cpu_read(pkrs_cache); > +} > +EXPORT_SYMBOL_GPL(get_current_pkrs); > diff --git a/include/linux/pkeys.h b/include/linux/pkeys.h > index bed0e293f13b..480429020f4c 100644 > --- a/include/linux/pkeys.h > +++ b/include/linux/pkeys.h > @@ -72,6 +72,10 @@ static inline void pks_mk_readwrite(int pkey) > { > pr_err("%s is not valid without PKS support\n", __func__); > } > +static inline u32 get_current_pkrs(void) > +{ > + return 0; > +} > #endif /* ! CONFIG_ARCH_HAS_SUPERVISOR_PKEYS */ > This would need an ack from the x86 people. Andy, Boris? Paolo