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=-8.6 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 94D7FC31E46 for ; Wed, 12 Jun 2019 09:36:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6F6FA21773 for ; Wed, 12 Jun 2019 09:36:20 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="BArrchFG" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2437507AbfFLJgT (ORCPT ); Wed, 12 Jun 2019 05:36:19 -0400 Received: from mail-pf1-f195.google.com ([209.85.210.195]:40601 "EHLO mail-pf1-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2437492AbfFLJgR (ORCPT ); Wed, 12 Jun 2019 05:36:17 -0400 Received: by mail-pf1-f195.google.com with SMTP id p184so6028137pfp.7; Wed, 12 Jun 2019 02:36:16 -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=wj3VoxcHtEUUOCOJDV3/IkQEZy74zBF0y5Hje4ka4G0=; b=BArrchFGj6F74ig6hTmStuzxFhPJZ6KsJshUxbEvyOuupxfYrF/zBfR30N0pk4xOcc teBMuzm0l1m45daeHUX3burBPW8WV0zQUWK2fXvQgPo9W4h9BO4PCQ1Ia/PGZ2hN03jf s7DQeahfa7guryuQtUJFgjNrVF6oVMTYGZKmpI8Yn5Ki75NW+mVqh++1OSJWj4TDbBma l3zs/7tK+4xiQBcdlaV5wZTIbEfSsP3BBMvaWYqDjjrurbWA7xnZE7F7YC4Tx6ThqCfi dhvILUbH7Lrk+zjxMD063GWv/UXtJXrQzxkQJZ6K2zFVPWMJsGg3Tqx9JYAIVdu1xIc3 Ptrw== 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=wj3VoxcHtEUUOCOJDV3/IkQEZy74zBF0y5Hje4ka4G0=; b=Sqev87SSwkejeclVkIx3S3CO69wFcjAys7uHrOfDnwkOqscVpkI59aTnyhGKNIym68 GAN8yftrvJcDDg0uTvXTaMlJB0D2SvvYS8twjZz5ONXJCm1cccg2rfWGHBjnVz9eDgvz NDgyxOabAiGW4on/M530LZ4tCbZu33rver2rKxjOQ0DnZn4f4aikdLNJT2G97rskpr/1 FmiWJCHeg2AmbbTEeHBML0oFvqezJVUOrYWhD0R+6KIhW+Y9uee1ILJgh5mMfhQ9MGbn OFOfMPbr020CF1uQ6iKfivebmHLbbfg70Ssi2NUL+95Rsus0u1qzC18p5FUYTmecI0Aa HuDg== X-Gm-Message-State: APjAAAXgTi7vRcM/Fi3tyv8mezsvIhvVL7QnmGxg3pPI2XPMqJYZG2U5 sNSff1ErdcEh+pIGJSmIJLaVRCsD X-Google-Smtp-Source: APXvYqxTtyS104EAy9EwtxxJYRYGAk5uwX2n69Tncivk7HrW3qgfKd4Wufam3aLANzkOY2bRbu3MuQ== X-Received: by 2002:a63:6105:: with SMTP id v5mr24291696pgb.312.1560332176123; Wed, 12 Jun 2019 02:36:16 -0700 (PDT) Received: from localhost.localdomain ([203.205.141.123]) by smtp.googlemail.com with ESMTPSA id 27sm6148936pgl.82.2019.06.12.02.36.13 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Wed, 12 Jun 2019 02:36:15 -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 v3 3/5] KVM: LAPIC: Expose per-vCPU timer_advance_ns to userspace Date: Wed, 12 Jun 2019 17:35:58 +0800 Message-Id: <1560332160-17050-4-git-send-email-wanpengli@tencent.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1560332160-17050-1-git-send-email-wanpengli@tencent.com> References: <1560332160-17050-1-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 | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/arch/x86/kvm/debugfs.c b/arch/x86/kvm/debugfs.c index c19c7ed..a6f1f93 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 +61,12 @@ int kvm_arch_create_vcpu_debugfs(struct kvm_vcpu *vcpu) if (!ret) return -ENOMEM; + 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