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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 52CA0C4332F for ; Fri, 3 Nov 2023 14:02:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1377755AbjKCOCR (ORCPT ); Fri, 3 Nov 2023 10:02:17 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38462 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1377744AbjKCOCN (ORCPT ); Fri, 3 Nov 2023 10:02:13 -0400 Received: from mail-yw1-x114a.google.com (mail-yw1-x114a.google.com [IPv6:2607:f8b0:4864:20::114a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D48E61BC for ; Fri, 3 Nov 2023 07:02:10 -0700 (PDT) Received: by mail-yw1-x114a.google.com with SMTP id 00721157ae682-5af592fed43so27757327b3.2 for ; Fri, 03 Nov 2023 07:02:10 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1699020130; x=1699624930; darn=vger.kernel.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=Vb+9RYEjnomUPpbNpxqOTLjP3moxOF2MeghLG8Ocm5Q=; b=hYvYIue6naFKM5SdZNzv3pM4bor9uY+uQjF4or5O9sGazevZ+YOhkEBNnBYwD8SIPJ TnNaYTeFZFgQ6kzYn1WaCpLWp6oqiIISEJTLhIhblinHLs24mY18dx/Lw7q03KU9f43l v0CCPKNbKHa7Z1N7uoqtVGlKTfJU1DaglNOvH9ueMO7mIfZocnFakr3PNVDbiMU5mT1R q3p5Zy451LivN8EHZc2p4hMyJb5KUrNoQkk29vj11w5YU++BiF3ph14PpNq5Xw99j6Jz 1BsEPWoEf2nD+idkA8GAzWsyJm5D9bEP0ze4lh8BUsiFGE2Y9nl/lXVVUBjsIg/wNyR4 YCUQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1699020130; x=1699624930; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=Vb+9RYEjnomUPpbNpxqOTLjP3moxOF2MeghLG8Ocm5Q=; b=MMsVvc3SDyhUFDPep7HVYQMDvkqZtrGMjnpOUXl6H7Uo9DDF+Kl4IomGjNOq+Zv8Qb eL4MIDXyqNfqL1yJ+TZ/ElP6YU1V2/yE0/65GeKH1gf+IeC4oXKieVP0CPVvtqJ7ase7 cehZHPHDAHnE8ZkPvQNZaIhjet5IednMb1kQd47HEioCJL8NGsnADz2/tTuTt+AKf+F6 YSniOlgUZTozeudGShYZFLBIKolYznti/j3JBxKOWTV2FDQWvtFd5r+JVa6A7VaIqzi9 yez4Lf+oJwSmpuCjmHRO6PMFhVKK955hRPu5qtcCqqTiUz7KMzexgpCzaS/LKXP2esJu b2qg== X-Gm-Message-State: AOJu0YxzjVBvMdm8t8U7SlK+3WWCISfQ1XinAJ10n//ppirkMxs1up7O erfSt/LvYnasKkHxmJyX5AZMKCw3G1s= X-Google-Smtp-Source: AGHT+IGEA1BvGiRWNQjrbq7aKq8bZ+jodDO8Ix7KIjtF8dmXoXMo1O1r7lSdH3mz9BX0C3GycpAGBkiz/BY= X-Received: from zagreus.c.googlers.com ([fda3:e722:ac3:cc00:7f:e700:c0a8:5c37]) (user=seanjc job=sendgmr) by 2002:a81:5215:0:b0:5a7:acc1:5142 with SMTP id g21-20020a815215000000b005a7acc15142mr55197ywb.8.1699020129602; Fri, 03 Nov 2023 07:02:09 -0700 (PDT) Date: Fri, 3 Nov 2023 07:02:07 -0700 In-Reply-To: <10fd9a3e-1bc2-7d4d-0535-162854fc5e9d@intel.com> Mime-Version: 1.0 References: <20230914063325.85503-1-weijiang.yang@intel.com> <20230914063325.85503-15-weijiang.yang@intel.com> <2b1973ee44498039c97d4d11de3a93b0f3b1d2d8.camel@redhat.com> <10fd9a3e-1bc2-7d4d-0535-162854fc5e9d@intel.com> Message-ID: Subject: Re: [PATCH v6 14/25] KVM: x86: Load guest FPU state when access XSAVE-managed MSRs From: Sean Christopherson To: Weijiang Yang Cc: Maxim Levitsky , pbonzini@redhat.com, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, dave.hansen@intel.com, peterz@infradead.org, chao.gao@intel.com, rick.p.edgecombe@intel.com, john.allen@amd.com Content-Type: text/plain; charset="us-ascii" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Nov 03, 2023, Weijiang Yang wrote: > On 11/2/2023 2:05 AM, Sean Christopherson wrote: > > /* > > * Returns true if the MSR in question is managed via XSTATE, i.e. is context > > * switched with the rest of guest FPU state. > > */ > > static bool is_xstate_managed_msr(u32 index) > > How about is_xfeature_msr()? xfeature is XSAVE-Supported-Feature, just to align with SDM > convention. My vote remains for is_xstate_managed_msr(). is_xfeature_msr() could also refer to MSRs that control XSTATE features, e.g. XSS.