From patchwork Tue Apr 13 12:26:24 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vitaly Kuznetsov X-Patchwork-Id: 12200415 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=-15.8 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 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 D3BFFC43460 for ; Tue, 13 Apr 2021 12:28:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B75EF61369 for ; Tue, 13 Apr 2021 12:28:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1344091AbhDMM23 (ORCPT ); Tue, 13 Apr 2021 08:28:29 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:38740 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1345596AbhDMM1z (ORCPT ); Tue, 13 Apr 2021 08:27:55 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1618316855; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=yR7IlAhx/B5XJ+0ixhU/p5f+3s/SmBKSwi/7KCJ61qI=; b=iKJ5gHcnRnxXKASEa/bGWAITd6vVkX5ZdVGRA3rGUn8I8abGOoGcijw7nmwdgvPN5Q+FXq J+TDA+S5Dt4AfM4P9bJCAKIMdWYnpHG3+91Pnb027p+ZZ3fJL7oS5Tgm6ABXx4dCKp12cC KZzlaG+mHr74w0iueXwNuYn9t/ukhd8= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-472-BxZjuDmGPJSvNGBvCHYR4w-1; Tue, 13 Apr 2021 08:27:33 -0400 X-MC-Unique: BxZjuDmGPJSvNGBvCHYR4w-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 5473A19611A9; Tue, 13 Apr 2021 12:27:32 +0000 (UTC) Received: from vitty.brq.redhat.com (unknown [10.40.195.75]) by smtp.corp.redhat.com (Postfix) with ESMTP id E6EA760C04; Tue, 13 Apr 2021 12:27:24 +0000 (UTC) From: Vitaly Kuznetsov To: kvm@vger.kernel.org, Paolo Bonzini Cc: Sean Christopherson , Wanpeng Li , Jim Mattson , Siddharth Chandrasekaran , linux-kernel@vger.kernel.org, linux-hyperv@vger.kernel.org Subject: [PATCH RFC 16/22] KVM: x86: hyper-v: Honor HV_STIMER_DIRECT_MODE_AVAILABLE privilege bit Date: Tue, 13 Apr 2021 14:26:24 +0200 Message-Id: <20210413122630.975617-17-vkuznets@redhat.com> In-Reply-To: <20210413122630.975617-1-vkuznets@redhat.com> References: <20210413122630.975617-1-vkuznets@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Synthetic timers can only be configured in 'direct' mode when HV_STIMER_DIRECT_MODE_AVAILABLE bit was exposed. Signed-off-by: Vitaly Kuznetsov --- arch/x86/kvm/hyperv.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/arch/x86/kvm/hyperv.c b/arch/x86/kvm/hyperv.c index 1299847c89ba..0df18187d908 100644 --- a/arch/x86/kvm/hyperv.c +++ b/arch/x86/kvm/hyperv.c @@ -646,6 +646,11 @@ static int stimer_set_config(struct kvm_vcpu_hv_stimer *stimer, u64 config, HV_MSR_SYNTIMER_AVAILABLE)))) return 1; + if (unlikely(!host && new_config.direct_mode && + !(to_hv_vcpu(vcpu)->cpuid_cache.features_edx & + HV_STIMER_DIRECT_MODE_AVAILABLE))) + return 1; + trace_kvm_hv_stimer_set_config(hv_stimer_to_vcpu(stimer)->vcpu_id, stimer->index, config, host);