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=-14.9 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT 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 B14A2C2BC11 for ; Mon, 14 Sep 2020 12:02:56 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 74D5A207BB for ; Mon, 14 Sep 2020 12:02:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1600084976; bh=Dz8VPKMG3u9xhT1vjurFdEvD95mIR9qEA4N7PnuMqr4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=ZAcnQMjdW1vI3XR2Um2CZepLGcDGk8OKudh7j/HI+lb7o7acDK72mrTyaCtCJxjiV 2lqhgBr4XWvV/0LX34PBUdywg+2D7+lquVV+p6TZOZozeFbw8SfK5B3UVN/zJXm+UU kviZkG7LWSvRZRDKF/B5M/lqryhqWOs3ztTNzqlo= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726049AbgINLjQ (ORCPT ); Mon, 14 Sep 2020 07:39:16 -0400 Received: from mail-wm1-f68.google.com ([209.85.128.68]:51180 "EHLO mail-wm1-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726043AbgINL2R (ORCPT ); Mon, 14 Sep 2020 07:28:17 -0400 Received: by mail-wm1-f68.google.com with SMTP id e17so10265501wme.0; Mon, 14 Sep 2020 04:28:15 -0700 (PDT) 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=X6J2CzwhXftwm/TeG9EFVnDtNUf/94TE8a1c2ax2Kwg=; b=d8pM2i+c1tHgt18SQRb1kuFYEjUS07QWtkz4icFN4oTeKk6RKeCFx7dUMm0+vJEuUE /rs4MflxUfY5JL13EYIlP0sj0RnEZlVHZY8+kaR4fZc/kMDmudFyaLCT2qwJP3UGT8Gl WEEsRWdYx9A041h19X3ZEbQppaOQHJfNCurEjKDAeI+GJGCxuvP5wKbGuXbf/sHigg1x +BG/e8P+OJO+jt04OjDMFkj8DpvzZxM7qA465Zhb4E1kTxCMpvesZSocYHF8ynceHb+f Mkri8lqcya9k3CoIrS1v8Qppyb3mCFivF7Yew08vrAjep/nT7Ot/Qc6Ml79DZXeIlCLe Kf+A== X-Gm-Message-State: AOAM532GlgVWMCZdFyKsexJyBXs293R7pCHThLWPEK8WaUiPGwQYa/zT ZDEmPrsBAsq0TfdRG0sqQmaybmMo940= X-Google-Smtp-Source: ABdhPJxyG58IEEeo6bVincS3/LIJYG+JR5JSj95TDGfTR8oRCgp7Yjj46VhZJ4jq6VOuMWvHkTyFDQ== X-Received: by 2002:a1c:f619:: with SMTP id w25mr14220116wmc.62.1600082895118; Mon, 14 Sep 2020 04:28:15 -0700 (PDT) Received: from liuwe-devbox-debian-v2.j3c5onc20sse1dnehy4noqpfcg.zx.internal.cloudapp.net ([51.145.34.42]) by smtp.gmail.com with ESMTPSA id s12sm12024606wmd.20.2020.09.14.04.28.14 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 14 Sep 2020 04:28:14 -0700 (PDT) From: Wei Liu To: Linux on Hyper-V List Cc: virtualization@lists.linux-foundation.org, Linux Kernel List , Michael Kelley , Vineeth Pillai , Sunil Muthuswamy , Nuno Das Neves , Wei Liu , "K. Y. Srinivasan" , Haiyang Zhang , Stephen Hemminger , Daniel Lezcano , Thomas Gleixner Subject: [PATCH RFC v1 05/18] clocksource/hyperv: use MSR-based access if running as root Date: Mon, 14 Sep 2020 11:27:49 +0000 Message-Id: <20200914112802.80611-6-wei.liu@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200914112802.80611-1-wei.liu@kernel.org> References: <20200914112802.80611-1-wei.liu@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-hyperv-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-hyperv@vger.kernel.org Signed-off-by: Wei Liu --- drivers/clocksource/hyperv_timer.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/clocksource/hyperv_timer.c b/drivers/clocksource/hyperv_timer.c index 09aa44cb8a91..fe96082ce85e 100644 --- a/drivers/clocksource/hyperv_timer.c +++ b/drivers/clocksource/hyperv_timer.c @@ -426,6 +426,9 @@ static bool __init hv_init_tsc_clocksource(void) if (!(ms_hyperv.features & HV_MSR_REFERENCE_TSC_AVAILABLE)) return false; + if (hv_root_partition) + return false; + hv_read_reference_counter = read_hv_clock_tsc; phys_addr = virt_to_phys(hv_get_tsc_page()); -- 2.20.1