From patchwork Mon Apr 26 09:06:42 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hikaru Nishida X-Patchwork-Id: 12224003 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=-19.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,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 32EF6C43461 for ; Mon, 26 Apr 2021 09:09:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 050306102A for ; Mon, 26 Apr 2021 09:09:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232711AbhDZJJq (ORCPT ); Mon, 26 Apr 2021 05:09:46 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59962 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232477AbhDZJJQ (ORCPT ); Mon, 26 Apr 2021 05:09:16 -0400 Received: from mail-pg1-x52b.google.com (mail-pg1-x52b.google.com [IPv6:2607:f8b0:4864:20::52b]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 593DCC061756 for ; Mon, 26 Apr 2021 02:08:35 -0700 (PDT) Received: by mail-pg1-x52b.google.com with SMTP id b17so2632356pgh.7 for ; Mon, 26 Apr 2021 02:08:35 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=Ze/d40V9r4jheKthRdtDHEg05bx8WqXy096MFG21BNk=; b=ZEW/ctj1rqE5BI7PZyNweAk4hCGwOn1XeB1UK3EInZuZ+KOoZj+FZniUs0eawFNTb3 piyAhNUq9Pt8NKjOGRjvXBUPiX9qxN9duDSUduOf6L6+VgKTaOlJcE4N0Fwb0qughoZE OAeozLRUZfPsZt//DGi8umsGUs0nsnU1cT4gM= 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=Ze/d40V9r4jheKthRdtDHEg05bx8WqXy096MFG21BNk=; b=YDWeJO7eNFy32mBkURs1Jl6Fcyn8MoDOJvEIITlLz3LXVLNx1V076mehGRg9JVOkgk 1jcJ07tbUrDYDMqe25hD6Q1qhPLP5QVrWSvtx6nXf25jBXJbx1W7E0H9jJCSFX2AXTi4 wxJYsFVy0iKdtfGGj+utRTYpauOcs+zRB8OIUwspauOlAWdkMit453+vnGomlJdwbpdP cmkSsM02sQ3hiBtLkhTBNadX0pgnwlKU2zUaGyG1cQ6Plqi5BPvuckTvX91lNStjfzc9 FOPWz72r5OE4h2Z7P9Et2cXgEvTuLVPAoOXD51FUiWlnLVilHemKHrFL4kbqWZnPoSl4 /2Lg== X-Gm-Message-State: AOAM531xVEx8aMH5wtjtWI3+8GLX857HDlK/F1ovNtQaniCWaGEdW4qD dZvjKPOHmVe3meFv6bxvQ5RQher4vtD73A== X-Google-Smtp-Source: ABdhPJyaxGiniEDS09BITbtGyjkgjq743HWx/3/pq/SXK/DWtL+tSMT3yuzIQODND9+YCVlEcaq/bg== X-Received: by 2002:a63:a47:: with SMTP id z7mr15779744pgk.350.1619428114657; Mon, 26 Apr 2021 02:08:34 -0700 (PDT) Received: from localhost (160.131.236.35.bc.googleusercontent.com. [35.236.131.160]) by smtp.gmail.com with UTF8SMTPSA id 22sm14650977pjl.31.2021.04.26.02.08.32 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 26 Apr 2021 02:08:34 -0700 (PDT) From: Hikaru Nishida To: kvm@vger.kernel.org Cc: suleiman@google.com, Hikaru Nishida , Borislav Petkov , "H. Peter Anvin" , Ingo Molnar , Jim Mattson , Joerg Roedel , Paolo Bonzini , Sean Christopherson , Thomas Gleixner , Vitaly Kuznetsov , Wanpeng Li , linux-kernel@vger.kernel.org, x86@kernel.org Subject: [RFC PATCH 3/6] x86/kvm: Add CONFIG_KVM_VIRT_SUSPEND_TIMING Date: Mon, 26 Apr 2021 18:06:42 +0900 Message-Id: <20210426090644.2218834-4-hikalium@chromium.org> X-Mailer: git-send-email 2.31.1.498.g6c1eba8ee3d-goog In-Reply-To: <20210426090644.2218834-1-hikalium@chromium.org> References: <20210426090644.2218834-1-hikalium@chromium.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org The config option can be used to enable virtual suspend time injection support on kvm hosts. Signed-off-by: Hikaru Nishida --- arch/x86/kvm/Kconfig | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/arch/x86/kvm/Kconfig b/arch/x86/kvm/Kconfig index a788d5120d4d..6cb6795726a2 100644 --- a/arch/x86/kvm/Kconfig +++ b/arch/x86/kvm/Kconfig @@ -119,4 +119,17 @@ config KVM_MMU_AUDIT This option adds a R/W kVM module parameter 'mmu_audit', which allows auditing of KVM MMU events at runtime. +config KVM_VIRT_SUSPEND_TIMING + bool "Virtual suspend time injection" + depends on KVM=y + default n + help + This option makes the host's suspension reflected on the guest's clocks. + In other words, guest's CLOCK_MONOTONIC will stop and + CLOCK_BOOTTIME keeps running during the host's suspension. + This feature will only be effective when both guest and host enable + this option. + + If unsure, say N. + endif # VIRTUALIZATION