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=-6.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED 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 95B36C43143 for ; Tue, 2 Oct 2018 11:28:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6548D20652 for ; Tue, 2 Oct 2018 11:28:02 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 6548D20652 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=zytor.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727586AbeJBSKs (ORCPT ); Tue, 2 Oct 2018 14:10:48 -0400 Received: from terminus.zytor.com ([198.137.202.136]:46667 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727345AbeJBSKs (ORCPT ); Tue, 2 Oct 2018 14:10:48 -0400 Received: from terminus.zytor.com (localhost [127.0.0.1]) by terminus.zytor.com (8.15.2/8.15.2) with ESMTPS id w92BRqnq1937362 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Tue, 2 Oct 2018 04:27:52 -0700 Received: (from tipbot@localhost) by terminus.zytor.com (8.15.2/8.15.2/Submit) id w92BRpKo1937359; Tue, 2 Oct 2018 04:27:51 -0700 Date: Tue, 2 Oct 2018 04:27:51 -0700 X-Authentication-Warning: terminus.zytor.com: tipbot set sender to tipbot@zytor.com using -f From: tip-bot for Yi Sun Message-ID: Cc: hpa@zytor.com, linux-kernel@vger.kernel.org, mingo@kernel.org, sthemmin@microsoft.com, haiyangz@microsoft.com, mikelley@microsoft.com, yi.y.sun@linux.intel.com, kys@microsoft.com, tglx@linutronix.de Reply-To: hpa@zytor.com, linux-kernel@vger.kernel.org, sthemmin@microsoft.com, mingo@kernel.org, haiyangz@microsoft.com, mikelley@microsoft.com, kys@microsoft.com, tglx@linutronix.de, yi.y.sun@linux.intel.com In-Reply-To: <1538028104-114050-2-git-send-email-yi.y.sun@linux.intel.com> References: <1538028104-114050-2-git-send-email-yi.y.sun@linux.intel.com> To: linux-tip-commits@vger.kernel.org Subject: [tip:x86/hyperv] x86/hyperv: Add GUEST_IDLE_MSR support Git-Commit-ID: 10d02e13385ce1e90abb49ef1e9a366a5d968157 X-Mailer: tip-git-log-daemon Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=UTF-8 Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Commit-ID: 10d02e13385ce1e90abb49ef1e9a366a5d968157 Gitweb: https://git.kernel.org/tip/10d02e13385ce1e90abb49ef1e9a366a5d968157 Author: Yi Sun AuthorDate: Thu, 27 Sep 2018 14:01:43 +0800 Committer: Thomas Gleixner CommitDate: Tue, 2 Oct 2018 13:21:52 +0200 x86/hyperv: Add GUEST_IDLE_MSR support Hyper-V may expose a HV_X64_MSR_GUEST_IDLE MSR via HYPERV_CPUID_FEATURES. Reading this MSR triggers the host to transition the guest vCPU into an idle state. This state can be exited via an IPI even if the read in the guest happened from an interrupt disabled section. Signed-off-by: Yi Sun Signed-off-by: Thomas Gleixner Reviewed-by: Michael Kelley Cc: chao.p.peng@intel.com Cc: chao.gao@intel.com Cc: isaku.yamahata@intel.com Cc: tianyu.lan@microsoft.com Cc: "K. Y. Srinivasan" Cc: Haiyang Zhang Cc: Stephen Hemminger Link: https://lkml.kernel.org/r/1538028104-114050-2-git-send-email-yi.y.sun@linux.intel.com --- arch/x86/include/asm/hyperv-tlfs.h | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/arch/x86/include/asm/hyperv-tlfs.h b/arch/x86/include/asm/hyperv-tlfs.h index 00e01d215f74..4139f7650fe5 100644 --- a/arch/x86/include/asm/hyperv-tlfs.h +++ b/arch/x86/include/asm/hyperv-tlfs.h @@ -38,6 +38,8 @@ #define HV_MSR_TIME_REF_COUNT_AVAILABLE (1 << 1) /* Partition reference TSC MSR is available */ #define HV_MSR_REFERENCE_TSC_AVAILABLE (1 << 9) +/* Partition Guest IDLE MSR is available */ +#define HV_X64_MSR_GUEST_IDLE_AVAILABLE (1 << 10) /* A partition's reference time stamp counter (TSC) page */ #define HV_X64_MSR_REFERENCE_TSC 0x40000021 @@ -246,6 +248,9 @@ #define HV_X64_MSR_STIMER3_CONFIG 0x400000B6 #define HV_X64_MSR_STIMER3_COUNT 0x400000B7 +/* Hyper-V guest idle MSR */ +#define HV_X64_MSR_GUEST_IDLE 0x400000F0 + /* Hyper-V guest crash notification MSR's */ #define HV_X64_MSR_CRASH_P0 0x40000100 #define HV_X64_MSR_CRASH_P1 0x40000101