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=-26.2 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, URIBL_BLOCKED,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 678F6C433F5 for ; Wed, 22 Sep 2021 00:06:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4EB276120C for ; Wed, 22 Sep 2021 00:06:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231695AbhIVAH2 (ORCPT ); Tue, 21 Sep 2021 20:07:28 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56738 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231500AbhIVAHU (ORCPT ); Tue, 21 Sep 2021 20:07:20 -0400 Received: from mail-qk1-x74a.google.com (mail-qk1-x74a.google.com [IPv6:2607:f8b0:4864:20::74a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1D850C061757 for ; Tue, 21 Sep 2021 17:05:51 -0700 (PDT) Received: by mail-qk1-x74a.google.com with SMTP id bi14-20020a05620a318e00b00432f0915dd6so5962309qkb.6 for ; Tue, 21 Sep 2021 17:05:51 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=reply-to:date:in-reply-to:message-id:mime-version:references :subject:from:to:cc; bh=WoefsUy8P8uVLjBhkd6fplSxv9zXtwFfZO3aWK09BqE=; b=W3dvAswYaFrMhdUxOnj+C5EXMMEyJrI4w2EWKYkJvgEgkHuR8IaKKfSJHg9j0xw5+k fgorvfW1/YzGQUtW4RZ95gDG0qA72H/qeIgYOd+4TOG6c+1wocOOu3VRxQzsB6jGSO5g yRDdyBni9EhmFEE/PynpUeNnGYgcYXTu6HydYJ60R/86lZ/rosIKMEDAP+lTix9jhUIs 1g7+eQ1MkKa4HLPulfOq0mS5b56v1Wn9wTgMBlG9vvFK/yuOUIxbO5OMIO050BN1ziI7 quI8vYbT72gL4MHo6ScRZ81Wr5yMBwO1kb48G3KB1R6pXXjpQyqrpGzih9Su7JxvCNCF qqhg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:reply-to:date:in-reply-to:message-id :mime-version:references:subject:from:to:cc; bh=WoefsUy8P8uVLjBhkd6fplSxv9zXtwFfZO3aWK09BqE=; b=dIzCfcPLXZoFdclWFMSsijgB4HdDhtcUimhbpb62P7d//KtNqUgL0M0X0sXxMly35m heqeVmXnfyPITT/9W54bw8TQ34vw5GeE973eywn2EQv0TuY1uHX6KZlhFcGNkAj4Kwkj onIKp9HMNEdsY1OsjOMoXIqn7fu/wcbr0iZhlDqor1nNs3ZOJfbm7j2kYCim8+HRCxK0 tmD1W9arY3Sn9MPg7RP/OyCobTi7EsFcsgomMt/L+lzDIW9ieiikgzhFStsni7uFjypo DsUnnrg3UjPYNtnNb9VshrlGsOcrPvfOHz8/FrXTp1RbnL5aBG/rukMjtX2UiHWp9iWr m/fA== X-Gm-Message-State: AOAM533MfSA4+X9nIbWim3ZRBKTV4heoMqVIUtG3s8g0r1xo9ySEINLv 3MBoymp57qf98byrKxLVpmJzbdaoxfI= X-Google-Smtp-Source: ABdhPJydgoIIy+PWW+KTdPOq8w+CNl9+TVcl5SdFV/4H0FYG9MktEVuetKxR7qEx7VklEO7jLEzl555CBZg= X-Received: from seanjc798194.pdx.corp.google.com ([2620:15c:90:200:b022:92d6:d37b:686c]) (user=seanjc job=sendgmr) by 2002:a25:2cd6:: with SMTP id s205mr42869270ybs.445.1632269150043; Tue, 21 Sep 2021 17:05:50 -0700 (PDT) Reply-To: Sean Christopherson Date: Tue, 21 Sep 2021 17:05:20 -0700 In-Reply-To: <20210922000533.713300-1-seanjc@google.com> Message-Id: <20210922000533.713300-4-seanjc@google.com> Mime-Version: 1.0 References: <20210922000533.713300-1-seanjc@google.com> X-Mailer: git-send-email 2.33.0.464.g1972c5931b-goog Subject: [PATCH v3 03/16] KVM: x86: Register Processor Trace interrupt hook iff PT enabled in guest From: Sean Christopherson To: Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Will Deacon , Mark Rutland , Marc Zyngier , Guo Ren , Nick Hu , Greentime Hu , Vincent Chen , Paul Walmsley , Palmer Dabbelt , Albert Ou , Paolo Bonzini , Boris Ostrovsky , Juergen Gross Cc: Alexander Shishkin , Jiri Olsa , Namhyung Kim , James Morse , Alexandru Elisei , Suzuki K Poulose , Sean Christopherson , Vitaly Kuznetsov , Wanpeng Li , Jim Mattson , Joerg Roedel , Stefano Stabellini , linux-arm-kernel@lists.infradead.org, linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.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-kernel@vger.kernel.org Override the Processor Trace (PT) interrupt handler for guest mode if and only if PT is configured for host+guest mode, i.e. is being used independently by both host and guest. If PT is configured for system mode, the host fully controls PT and must handle all events. Fixes: 8479e04e7d6b ("KVM: x86: Inject PMI for KVM guest") Cc: stable@vger.kernel.org Cc: Like Xu Reported-by: Alexander Shishkin Reported-by: Artem Kashkanov Signed-off-by: Sean Christopherson --- arch/x86/include/asm/kvm_host.h | 1 + arch/x86/kvm/vmx/vmx.c | 1 + arch/x86/kvm/x86.c | 5 ++++- 3 files changed, 6 insertions(+), 1 deletion(-) diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h index 09b256db394a..1ea4943a73d7 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -1494,6 +1494,7 @@ struct kvm_x86_init_ops { int (*disabled_by_bios)(void); int (*check_processor_compatibility)(void); int (*hardware_setup)(void); + bool (*intel_pt_intr_in_guest)(void); struct kvm_x86_ops *runtime_ops; }; diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c index fada1055f325..f19d72136f77 100644 --- a/arch/x86/kvm/vmx/vmx.c +++ b/arch/x86/kvm/vmx/vmx.c @@ -7896,6 +7896,7 @@ static struct kvm_x86_init_ops vmx_init_ops __initdata = { .disabled_by_bios = vmx_disabled_by_bios, .check_processor_compatibility = vmx_check_processor_compat, .hardware_setup = hardware_setup, + .intel_pt_intr_in_guest = vmx_pt_mode_is_host_guest, .runtime_ops = &vmx_x86_ops, }; diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index fb6015f97f9e..ffc6c2d73508 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -8305,7 +8305,7 @@ static struct perf_guest_info_callbacks kvm_guest_cbs = { .is_in_guest = kvm_is_in_guest, .is_user_mode = kvm_is_user_mode, .get_guest_ip = kvm_get_guest_ip, - .handle_intel_pt_intr = kvm_handle_intel_pt_intr, + .handle_intel_pt_intr = NULL, }; #ifdef CONFIG_X86_64 @@ -11061,6 +11061,8 @@ int kvm_arch_hardware_setup(void *opaque) memcpy(&kvm_x86_ops, ops->runtime_ops, sizeof(kvm_x86_ops)); kvm_ops_static_call_update(); + if (ops->intel_pt_intr_in_guest && ops->intel_pt_intr_in_guest()) + kvm_guest_cbs.handle_intel_pt_intr = kvm_handle_intel_pt_intr; perf_register_guest_info_callbacks(&kvm_guest_cbs); if (!kvm_cpu_cap_has(X86_FEATURE_XSAVES)) @@ -11091,6 +11093,7 @@ int kvm_arch_hardware_setup(void *opaque) void kvm_arch_hardware_unsetup(void) { perf_unregister_guest_info_callbacks(&kvm_guest_cbs); + kvm_guest_cbs.handle_intel_pt_intr = NULL; static_call(kvm_x86_hardware_unsetup)(); } -- 2.33.0.464.g1972c5931b-goog