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=-9.1 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham 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 795AFC04AAF for ; Mon, 20 May 2019 08:18:33 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4EE972081C for ; Mon, 20 May 2019 08:18:33 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="F4ADy1WJ" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731246AbfETISc (ORCPT ); Mon, 20 May 2019 04:18:32 -0400 Received: from mail-pf1-f194.google.com ([209.85.210.194]:36224 "EHLO mail-pf1-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731227AbfETISb (ORCPT ); Mon, 20 May 2019 04:18:31 -0400 Received: by mail-pf1-f194.google.com with SMTP id v80so6846983pfa.3; Mon, 20 May 2019 01:18:30 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=mdt4XlZC2pbZEPI5nicfnEPh8hasPLijQObiVuuVk5U=; b=F4ADy1WJ9aMW0Az7Dcb+0CcgLU5O44XY/14U+Gs4tGxmIBm8szxfx4j6S1DkxBcrlR n3PQ5hf9p+QsKDZZ17LuTCPhVJ0SJy9BRgMi86tDC4R5JfaH8jBBLLbg19iojD470F0M BNuPG3VUxmoyGnsgdQHheUr+YWFBQzFWf6Jaa2KKt/aUIvxKGRyyPCe1hoN990YW7av3 U0pSVnYD46UujRL35g1wN6nnQ+5QCYfX68CyQ3nNcAUcziw35h4puVYMvmbeJV1vjX5g El1D+tXjs56vmcaX2HrWEIBNhrR3jPfqbO12VFmG3Jt/zKLMJ6Gc7/qLSGPDZXIeU6y7 pHgg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=mdt4XlZC2pbZEPI5nicfnEPh8hasPLijQObiVuuVk5U=; b=t1N6mE4bovCAkdm4sxSkr2V3MQutda9jbzqJt/w7bbROibnLFVEUOTZ7XVbSt5KYYf EvbZcP/XweJCD6qVHWAcg7MK/mZZbgLv7VYETjHbRh5RTKcSvl/q0TPbtA9jWyz895xM BzolPAIVCtdesZESqKvm4zlpEoG3MUZ+ZrvMzCQ/s4mT9v/I//QWfARnm1gkFNBifpbG Gi2R7d564jpa9N5BZX1yyP7z3/jG7fO23sndtkMzFTf0ayzmy3/0CC6kDlv73j5dZgZS S68fZbA+jgqZi2VU6U4U5t/bGmmQ3lUEn7jh/j7Uly26Ht6bgXK02HFjEE/dD8hTXgQl 9f/w== X-Gm-Message-State: APjAAAU9V3tJOXzxiQafzrDkT0WhaRhhfE4hOItXOZChKb47FCiC9Xbf rvYntgY2DfkancSJKS9Ot7DXbaMC X-Google-Smtp-Source: APXvYqyPyLbyrCRfNQefD9XIPpkMB7dSe/X8dKxXE/5/RV60f4apoPUFT3zr2mZ2wfTsTB2UZp3TBQ== X-Received: by 2002:a63:fc08:: with SMTP id j8mr73659889pgi.432.1558340310502; Mon, 20 May 2019 01:18:30 -0700 (PDT) Received: from localhost.localdomain ([203.205.141.123]) by smtp.googlemail.com with ESMTPSA id z9sm18522110pgc.82.2019.05.20.01.18.28 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Mon, 20 May 2019 01:18:30 -0700 (PDT) From: Wanpeng Li X-Google-Original-From: Wanpeng Li To: linux-kernel@vger.kernel.org, kvm@vger.kernel.org Cc: Paolo Bonzini , =?UTF-8?q?Radim=20Kr=C4=8Dm=C3=A1=C5=99?= , Sean Christopherson , Liran Alon Subject: [PATCH v4 3/5] KVM: LAPIC: Expose per-vCPU timer_advance_ns to userspace Date: Mon, 20 May 2019 16:18:07 +0800 Message-Id: <1558340289-6857-4-git-send-email-wanpengli@tencent.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1558340289-6857-1-git-send-email-wanpengli@tencent.com> References: <1558340289-6857-1-git-send-email-wanpengli@tencent.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Wanpeng Li Expose per-vCPU timer_advance_ns to userspace, so it is able to query the auto-adjusted value. Cc: Paolo Bonzini Cc: Radim Krčmář Cc: Sean Christopherson Cc: Liran Alon Signed-off-by: Wanpeng Li --- arch/x86/kvm/debugfs.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) diff --git a/arch/x86/kvm/debugfs.c b/arch/x86/kvm/debugfs.c index c19c7ed..a2f3432 100644 --- a/arch/x86/kvm/debugfs.c +++ b/arch/x86/kvm/debugfs.c @@ -9,12 +9,22 @@ */ #include #include +#include "lapic.h" bool kvm_arch_has_vcpu_debugfs(void) { return true; } +static int vcpu_get_timer_advance_ns(void *data, u64 *val) +{ + struct kvm_vcpu *vcpu = (struct kvm_vcpu *) data; + *val = vcpu->arch.apic->lapic_timer.timer_advance_ns; + return 0; +} + +DEFINE_SIMPLE_ATTRIBUTE(vcpu_timer_advance_ns_fops, vcpu_get_timer_advance_ns, NULL, "%llu\n"); + static int vcpu_get_tsc_offset(void *data, u64 *val) { struct kvm_vcpu *vcpu = (struct kvm_vcpu *) data; @@ -51,6 +61,14 @@ int kvm_arch_create_vcpu_debugfs(struct kvm_vcpu *vcpu) if (!ret) return -ENOMEM; + if (lapic_in_kernel(vcpu)) { + ret = debugfs_create_file("lapic_timer_advance_ns", 0444, + vcpu->debugfs_dentry, + vcpu, &vcpu_timer_advance_ns_fops); + if (!ret) + return -ENOMEM; + } + if (kvm_has_tsc_control) { ret = debugfs_create_file("tsc-scaling-ratio", 0444, vcpu->debugfs_dentry, -- 2.7.4