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=-26.3 required=3.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT,USER_IN_DEF_DKIM_WL 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 2B02DC43216 for ; Fri, 27 Aug 2021 00:58:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 14902610E8 for ; Fri, 27 Aug 2021 00:58:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S244044AbhH0A6t (ORCPT ); Thu, 26 Aug 2021 20:58:49 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34000 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S243983AbhH0A6g (ORCPT ); Thu, 26 Aug 2021 20:58:36 -0400 Received: from mail-yb1-xb49.google.com (mail-yb1-xb49.google.com [IPv6:2607:f8b0:4864:20::b49]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4F333C061757 for ; Thu, 26 Aug 2021 17:57:48 -0700 (PDT) Received: by mail-yb1-xb49.google.com with SMTP id q9-20020a252a09000000b0059b9b61f6ceso4876497ybq.19 for ; Thu, 26 Aug 2021 17:57:48 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=reply-to:date:in-reply-to:message-id:mime-version:references :subject:from:to:cc; bh=AFHcFLQ8Zudn3D234yQQ371MlX0hPffSTnop5clNbU4=; b=ehODs2sAzX4fmqGdkUXhOCuacyAsZ5WG5XMN79bjP+xq4RU4v9fT+sBLKRTlQqGWyX q30luLe7UbUT+k5DL/N9U4aU2TEa+qPeGqAJxEBE/FVgE0CuiF3raXC1RXOK3ImBGaQ4 XbKMz4w/DkAC9W9hss3rUtWCAWdzbERpB661AM+dQQmPgaw7Ftx+tH6bG8AYsTaZ9CDU e02FAinIj3+x9EA64fOdiwehQIAyNOzTqpYk8MnCh+cFqm78JcgPcKiioGpdAXvwto5l kIPH0qjJWMM4k2bYrS2zDHxLCqBbRaCfrumPTD8MLrYqYErmy2b3iS7uHQauGeKAtamE EuYw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:reply-to:date:in-reply-to:message-id :mime-version:references:subject:from:to:cc; bh=AFHcFLQ8Zudn3D234yQQ371MlX0hPffSTnop5clNbU4=; b=rSsr4Q0wcWjMxEl1qTDAy8lbMvG/GEIUP/SR6WkmB8UMu8fgs8VVaQQs/aYKo3l6HK 8uJzo7NgK87JsKtGNAafYMxPc+u1F1tqC9TjGolTfVQqG1dDqh1E3QiuBLSUNVVd707/ JdPU7QCM+2fYJgKwP/xGActVf4ZxZm0dGPIYql2/URv1Gb0FAPxxO7lqyzD1z6ZUi9JN PiKwlicVkfpWmb7/39h8EiU4Q9HAiLtTVxoQyUBlcjOnGcYjCYe3YaVE4LON+WkFc54n jz6rlGUU8WRdjCLF6Af23y1xCkf7bbAE1pQZB0678ABTCOZqJKJSNQfD2huFxrDDmvPB fs2Q== X-Gm-Message-State: AOAM53182PwxiV0lzsFDQds225lDBhKuR38oDA24nSDlA8Mstr1pyoaz s+SIAupCkA75kRBKu6C33Y7q4O2grz8= X-Google-Smtp-Source: ABdhPJxdtTMoWPCFq9FJTrWuwV5L/MyoyJcLiUL8JKOdEyDnebSuapnzs9qVktMCvhy616hB+yWZoBPXnlo= X-Received: from seanjc798194.pdx.corp.google.com ([2620:15c:90:200:c16c:db05:96b2:1475]) (user=seanjc job=sendgmr) by 2002:a25:7a03:: with SMTP id v3mr2037918ybc.202.1630025867497; Thu, 26 Aug 2021 17:57:47 -0700 (PDT) Reply-To: Sean Christopherson Date: Thu, 26 Aug 2021 17:57:11 -0700 In-Reply-To: <20210827005718.585190-1-seanjc@google.com> Message-Id: <20210827005718.585190-9-seanjc@google.com> Mime-Version: 1.0 References: <20210827005718.585190-1-seanjc@google.com> X-Mailer: git-send-email 2.33.0.259.gc128427fd7-goog Subject: [PATCH 08/15] KVM: x86: Drop current_vcpu in favor of kvm_running_vcpu From: Sean Christopherson To: Will Deacon , Mark Rutland , Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Catalin Marinas , Marc Zyngier , Guo Ren , Nick Hu , Greentime Hu , Vincent Chen , Paul Walmsley , Palmer Dabbelt , Albert Ou , Thomas Gleixner , Borislav Petkov , x86@kernel.org, Paolo Bonzini , Boris Ostrovsky , Juergen Gross Cc: Alexander Shishkin , Jiri Olsa , Namhyung Kim , James Morse , Alexandru Elisei , Suzuki K Poulose , "H. Peter Anvin" , Sean Christopherson , Vitaly Kuznetsov , Wanpeng Li , Jim Mattson , Joerg Roedel , Stefano Stabellini , linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, linux-csky@vger.kernel.org, linux-riscv@lists.infradead.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, Artem Kashkanov , Like Xu , Zhu Lingshan Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-perf-users@vger.kernel.org Now that KVM registers perf callbacks only when the CPU is "in guest", use kvm_running_vcpu instead of current_vcpu to retrieve the associated vCPU and drop current_vcpu. Signed-off-by: Sean Christopherson --- arch/x86/kvm/x86.c | 12 +++++------- arch/x86/kvm/x86.h | 4 ---- 2 files changed, 5 insertions(+), 11 deletions(-) diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index d4d91944fde7..e337aef60793 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -8264,17 +8264,15 @@ static void kvm_timer_init(void) kvmclock_cpu_online, kvmclock_cpu_down_prep); } -DEFINE_PER_CPU(struct kvm_vcpu *, current_vcpu); -EXPORT_PER_CPU_SYMBOL_GPL(current_vcpu); - static int kvm_is_in_guest(void) { - return __this_cpu_read(current_vcpu) != NULL; + /* x86's callbacks are registered only when handling a guest NMI. */ + return true; } static int kvm_is_user_mode(void) { - struct kvm_vcpu *vcpu = __this_cpu_read(current_vcpu); + struct kvm_vcpu *vcpu = kvm_get_running_vcpu(); if (WARN_ON_ONCE(!vcpu)) return 0; @@ -8284,7 +8282,7 @@ static int kvm_is_user_mode(void) static unsigned long kvm_get_guest_ip(void) { - struct kvm_vcpu *vcpu = __this_cpu_read(current_vcpu); + struct kvm_vcpu *vcpu = kvm_get_running_vcpu(); if (WARN_ON_ONCE(!vcpu)) return 0; @@ -8294,7 +8292,7 @@ static unsigned long kvm_get_guest_ip(void) static void kvm_handle_intel_pt_intr(void) { - struct kvm_vcpu *vcpu = __this_cpu_read(current_vcpu); + struct kvm_vcpu *vcpu = kvm_get_running_vcpu(); if (WARN_ON_ONCE(!vcpu)) return; diff --git a/arch/x86/kvm/x86.h b/arch/x86/kvm/x86.h index 4c5ba4128b38..f13f15d2fab8 100644 --- a/arch/x86/kvm/x86.h +++ b/arch/x86/kvm/x86.h @@ -393,11 +393,8 @@ static inline void kvm_unregister_perf_callbacks(void) __perf_unregister_guest_info_callbacks(); } -DECLARE_PER_CPU(struct kvm_vcpu *, current_vcpu); - static inline void kvm_before_interrupt(struct kvm_vcpu *vcpu, bool is_nmi) { - __this_cpu_write(current_vcpu, vcpu); WRITE_ONCE(vcpu->arch.handling_nmi_from_guest, is_nmi); kvm_register_perf_callbacks(); @@ -408,7 +405,6 @@ static inline void kvm_after_interrupt(struct kvm_vcpu *vcpu) kvm_unregister_perf_callbacks(); WRITE_ONCE(vcpu->arch.handling_nmi_from_guest, false); - __this_cpu_write(current_vcpu, NULL); } -- 2.33.0.259.gc128427fd7-goog