Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1FDABC05027 for ; Fri, 10 Feb 2023 09:56:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231810AbjBJJ4I (ORCPT ); Fri, 10 Feb 2023 04:56:08 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47574 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231795AbjBJJ4G (ORCPT ); Fri, 10 Feb 2023 04:56:06 -0500 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id ECDEB728BD for ; Fri, 10 Feb 2023 01:55:24 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1676022924; 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: in-reply-to:in-reply-to:references:references; bh=XlYTQ4KlxOnSSgOz5EYIJQVx78dcnp/7ObBZhHdZOfo=; b=MMnTD7P72+d70wWHQO4HHyVB/+03AUbMAetgdCMA8FkSqijwgy6u/Fmfvs3r76LFDYjTnX Dd+1rXj8WWAdVIFY7EPQR7Cbmr9riu6JUDV2auBKxtkDdUBER/MMciAQ1tOpKiqvVLn3QR gEGGVC4TMHUjX2QQO2hiX9OPL8Zuack= Received: from mail-ej1-f70.google.com (mail-ej1-f70.google.com [209.85.218.70]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_128_GCM_SHA256) id us-mta-128-HS8_LSPpNDmYARx6j44laQ-1; Fri, 10 Feb 2023 04:55:22 -0500 X-MC-Unique: HS8_LSPpNDmYARx6j44laQ-1 Received: by mail-ej1-f70.google.com with SMTP id l18-20020a1709067d5200b008af415fdd80so2683168ejp.21 for ; Fri, 10 Feb 2023 01:55:21 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=mime-version:message-id:date:references:in-reply-to:subject:cc:to :from:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=XlYTQ4KlxOnSSgOz5EYIJQVx78dcnp/7ObBZhHdZOfo=; b=ie5R1uyF8pO8/xCW3b43fScwgIGeShpUfshW1ntVkB+NFv0jZ/HKHaoKlOkA4YPdLo Y0T0ZFAIvoeqJj34jVXOTN1jj7zfvk3iMArwDjRLFXkcdi6glnNXc+p7Qg2nqbap04Eq zAaSEwVVc+76BLXdGKR+nyvmQCjGRqeL0ISKu4IW2MGCG3hiUNRdhy/KEgxj7LsCAFHH jt5xhoP7HoXL4jp946wqcMyGes2JOSZqLc1UwsWQ3y6pmzbTAXGBRV2dJLQVTPE1sFEc zi2bMAlVygP5HgNxHBeYOdtvSzIwHVK/oU6qruDUpBDq38uYDStRoAUaTEjsYMnIDG8O PZOg== X-Gm-Message-State: AO0yUKVijABXbl7OPX5vmNJ6YjKzuCPjhkTQyVX+/bpRftdmjRJfrINV QVuqqOZOshM/Y0cKubTc1kBGbCph1oo4dWm9dxJd3gojnxmsA9D5wvl1kn6gpws51ySNGGtSzA/ SrsB9b71b3UdJU4N/Emq4NDIp X-Received: by 2002:a17:907:8e86:b0:8aa:33c4:87d5 with SMTP id tx6-20020a1709078e8600b008aa33c487d5mr14015959ejc.10.1676022920963; Fri, 10 Feb 2023 01:55:20 -0800 (PST) X-Google-Smtp-Source: AK7set8l6KUkKlyqNem1AZE2/KhW2JD0JqV9K6hSx1e0fgBDbFsSiIPL5QzIdySg4c0oOxOTyn5rmw== X-Received: by 2002:a17:907:8e86:b0:8aa:33c4:87d5 with SMTP id tx6-20020a1709078e8600b008aa33c487d5mr14015949ejc.10.1676022920808; Fri, 10 Feb 2023 01:55:20 -0800 (PST) Received: from fedora (nat-2.ign.cz. [91.219.240.2]) by smtp.gmail.com with ESMTPSA id a18-20020a170906469200b007c0f217aadbsm2140397ejr.24.2023.02.10.01.55.19 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 10 Feb 2023 01:55:20 -0800 (PST) From: Vitaly Kuznetsov To: Sean Christopherson , Paolo Bonzini Cc: Tom Rix , kvm@vger.kernel.org, llvm@lists.linux.dev, linux-kernel@vger.kernel.org, Nathan Chancellor , Nick Desaulniers Subject: Re: [PATCH 2/2] KVM: VMX: Stub out enable_evmcs static key for CONFIG_HYPERV=n In-Reply-To: References: <20230208205430.1424667-1-seanjc@google.com> <20230208205430.1424667-3-seanjc@google.com> <87mt5n6kx6.fsf@redhat.com> <1433ea0c-5072-b9d9-a533-401bb58f9a80@redhat.com> Date: Fri, 10 Feb 2023 10:55:19 +0100 Message-ID: <875yc97sl4.fsf@redhat.com> MIME-Version: 1.0 Content-Type: text/plain Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Sean Christopherson writes: > On Thu, Feb 09, 2023, Paolo Bonzini wrote: >> On 2/9/23 14:13, Vitaly Kuznetsov wrote: >> > > +static __always_inline bool is_evmcs_enabled(void) >> > > +{ >> > > + return static_branch_unlikely(&enable_evmcs); >> > > +} >> > I have a suggestion. While 'is_evmcs_enabled' name is certainly not >> > worse than 'enable_evmcs', it may still be confusing as it's not clear >> > which eVMCS is meant: are we running a guest using eVMCS or using eVMCS >> > ourselves? So what if we rename this to a very explicit 'is_kvm_on_hyperv()' >> > and hide the implementation details (i.e. 'evmcs') inside? >> >> I prefer keeping eVMCS in the name, > > +1, IIUC KVM can run on Hyper-V without eVMCS being enabled. > >> but I agree a better name could be something like kvm_uses_evmcs()? > > kvm_is_using_evmcs()? > Sounds good to me! -- Vitaly