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=-9.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,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 93D5DC282C2 for ; Fri, 25 Jan 2019 11:19:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 68109218A6 for ; Fri, 25 Jan 2019 11:19:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728074AbfAYLTt (ORCPT ); Fri, 25 Jan 2019 06:19:49 -0500 Received: from mail-wm1-f65.google.com ([209.85.128.65]:35645 "EHLO mail-wm1-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726216AbfAYLTp (ORCPT ); Fri, 25 Jan 2019 06:19:45 -0500 Received: by mail-wm1-f65.google.com with SMTP id t200so6336248wmt.0 for ; Fri, 25 Jan 2019 03:19:44 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=OymLaeZkDqCUBdn/5EkTjADbVQG+txQBjbSU5EvNNfY=; b=gP+H8xw6G9x6hMdgP+zhEuIjIkwweskXICCKjdUCJEZ+B33sNQjXEGr0Or1O9KPKLD dGdIdKv7YZLjvp2CEoEJ132adBJInwaONsBAmOr186muFm5L/99Jw9uhtdgft+3pe7nH h7BxakJMjGoYMyP8aIuFqwTyYao4Kx9cO8k806C7LzQst21IOvOcFF22wQvQDyb9Kfbg Q3M7PpsRMRWasfSrWtu8DCcRAiqTCQAaLcep1vdPYTD0oQM2kePWbk7SPLAzNYkiVfSy ClFVWbvSGE8AOysBtv8MgVUrcu1KrVeqZmUlpCzhUxjWgX7NLHP24GJFh59ujh1n9oRY iLLg== X-Gm-Message-State: AJcUukeNJz0lwe8t13DA+zJcNa8kA2q337TG1xFhtpvbvwVYkYXi+icj 0pnNYCv4ld3nE8RQt90dF54wvQ== X-Google-Smtp-Source: ALg8bN5uE6ngqEwW+Qx72iqaWsKkJEUmcEBRBUD+aZ1x1+As4rwbP4PB2NQIF+uNhtkfUbcqbS7NeA== X-Received: by 2002:a1c:e383:: with SMTP id a125mr944968wmh.1.1548415183845; Fri, 25 Jan 2019 03:19:43 -0800 (PST) Received: from vitty.brq.redhat.com.cz ([147.229.117.36]) by smtp.gmail.com with ESMTPSA id f2sm98101713wru.14.2019.01.25.03.19.42 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Fri, 25 Jan 2019 03:19:43 -0800 (PST) From: Vitaly Kuznetsov To: kvm@vger.kernel.org Cc: Paolo Bonzini , =?UTF-8?q?Radim=20Kr=C4=8Dm=C3=A1=C5=99?= , Roman Kagan , Liran Alon , linux-kernel@vger.kernel.org Subject: [PATCH v2 1/2] x86/kvm/hyper-v: don't recommend doing reset via synthetic MSR Date: Fri, 25 Jan 2019 12:19:33 +0100 Message-Id: <20190125111934.28782-2-vkuznets@redhat.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190125111934.28782-1-vkuznets@redhat.com> References: <20190125111934.28782-1-vkuznets@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org System reset through synthetic MSR is not recommended neither by genuine Hyper-V nor my QEMU. Fixes: 2bc39970e932 ("x86/kvm/hyper-v: Introduce KVM_GET_SUPPORTED_HV_CPUID") Signed-off-by: Vitaly Kuznetsov Reviewed-by: Liran Alon --- arch/x86/kvm/hyperv.c | 1 - 1 file changed, 1 deletion(-) diff --git a/arch/x86/kvm/hyperv.c b/arch/x86/kvm/hyperv.c index ac44a681f065..4840f5b3c88f 100644 --- a/arch/x86/kvm/hyperv.c +++ b/arch/x86/kvm/hyperv.c @@ -1847,7 +1847,6 @@ int kvm_vcpu_ioctl_get_hv_cpuid(struct kvm_vcpu *vcpu, struct kvm_cpuid2 *cpuid, case HYPERV_CPUID_ENLIGHTMENT_INFO: ent->eax |= HV_X64_REMOTE_TLB_FLUSH_RECOMMENDED; ent->eax |= HV_X64_APIC_ACCESS_RECOMMENDED; - ent->eax |= HV_X64_SYSTEM_RESET_RECOMMENDED; ent->eax |= HV_X64_RELAXED_TIMING_RECOMMENDED; ent->eax |= HV_X64_CLUSTER_IPI_RECOMMENDED; ent->eax |= HV_X64_EX_PROCESSOR_MASKS_RECOMMENDED; -- 2.20.1