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_PASS,URIBL_BLOCKED,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 4198EC04E87 for ; Thu, 16 May 2019 03:06:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 14F2E20873 for ; Thu, 16 May 2019 03:06:43 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="o2PFzX5X" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726569AbfEPDGi (ORCPT ); Wed, 15 May 2019 23:06:38 -0400 Received: from mail-pf1-f194.google.com ([209.85.210.194]:38543 "EHLO mail-pf1-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726157AbfEPDGd (ORCPT ); Wed, 15 May 2019 23:06:33 -0400 Received: by mail-pf1-f194.google.com with SMTP id b76so1027850pfb.5; Wed, 15 May 2019 20:06:32 -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=o2PFzX5XXTjHM7Is7ILyMiWkuD+EuU09jqrXKRM5ZMsgU5dg5Sby0LXSS0fAKAJ02B lX2fbQ1Gv8woSTm3HM/00/uobcptBPElLH1c0cC3yQ1QUNVpgbaYJ//SRL3p39PLVKA0 G6KY01qkqMr9owywjOOzhhYULon6xMbO2lXTenA61161xnQ45wnu2IAekXKn6RuvKv6O xx29PAyr7OIFf4BHvldC4qat4lMUGkBKwr40klc2ndnaM4gEE32FEWZvqNoMs4ADwYhd xljcSPol0Bin+u08yNHly9b2n01jr7RKCwLNptDp4TyR14sISxXWH4G1WR3Taia3WQXZ 7Q1g== 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=alhNZfAFUM6ceBVqIBxAFFHtxorbDEB4BF3vQxCzbiz4Wn109zZd7Dloi3n8MhmoQ8 l6pTCBfdv5sb2H9WAFkbpk6qYfleB6c5e2MG9SEt7Z2YnfpB1DxG7sLCUTfI6/SX6wbz gcGzJs4YYnxz5wZ7AsnCJD4nNiEDwM8VTcXSle/CFn/0h2li9Ibt6zDN33t4/UX09PJU RAzFQpsHbJz6aY00+bEolSuNH/ERJYWX/vt81GkMpIqTxUmKUZ9zTZvLXYUli3ZZFRRV Y5056QUaFLka3tByyni1v3uZNRLXkv8GsVRY8QL2km5ZN00idKTYTnaPJOSrntn+OlQ6 pYZA== X-Gm-Message-State: APjAAAXzV2gxC1sWjqtKvRGSebhrdbrCRlJebE2k1r4M/l+AhRZ6dHLL UoKkU58tWzMzrop4MMUDNHAfzA3v X-Google-Smtp-Source: APXvYqz0Ut+9EPMBpzXQyAadeV2zjf3d0jisgusL3n1EUlv85YhgFaoiro/1b7+r8p1tvKtwfcEqgw== X-Received: by 2002:a65:56c5:: with SMTP id w5mr48170360pgs.434.1557975992125; Wed, 15 May 2019 20:06:32 -0700 (PDT) Received: from localhost.localdomain ([203.205.141.123]) by smtp.googlemail.com with ESMTPSA id 204sm4247614pgh.50.2019.05.15.20.06.29 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Wed, 15 May 2019 20:06:31 -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: Thu, 16 May 2019 11:06:18 +0800 Message-Id: <1557975980-9875-4-git-send-email-wanpengli@tencent.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1557975980-9875-1-git-send-email-wanpengli@tencent.com> References: <1557975980-9875-1-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