From patchwork Fri Oct 21 15:34:59 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vitaly Kuznetsov X-Patchwork-Id: 6793 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a5d:4242:0:0:0:0:0 with SMTP id s2csp766556wrr; Fri, 21 Oct 2022 08:41:48 -0700 (PDT) X-Google-Smtp-Source: AMsMyM6rb5Xxi8vEf+pYDZRweSGTzEVrCMoqTyteUDrPM2Q9Ddc1x8XkL1wWwyU0yFZs5Sg3hgT0 X-Received: by 2002:a17:906:db07:b0:77b:82cf:54af with SMTP id xj7-20020a170906db0700b0077b82cf54afmr16639361ejb.666.1666366908549; Fri, 21 Oct 2022 08:41:48 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1666366908; cv=none; d=google.com; s=arc-20160816; b=YgHMftXCfwM/tSh7yFIf3ppCIhxaT8oEGJksDA3yhzUOvtatoSafN0wxAUMavRrEdY 8ek66U6gIQH7aR9t8aQg/GNSZZnenFQUkHhHafNugqLUCWTHfJUMTh4l5XWafURgnJL5 +mvQdKpOYhyQKJD/RAS/e0WivHblZy+99/ZFSooe93CgzsbtFtMb45o8A9UwOm2Db/0U nOoRt5Sfj+fqvm0UGbaQvGRXBEv5Xpj3pDT78lUZoylYCMqHzstG5GagW7NL8Au43MBA gK3z65vWvYu8zbqYHe3D7VEvwY74ax3QSpIFzuE9n0hB72Vxd3054kxh0C1X/ViEbG+h 8WHw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from :dkim-signature; bh=hf23owwXyl4mzv8DXKFj7XQPTlriWIPQsbBxFbBqkTQ=; b=A/mcZWTKFLdITEGcEvw7UDXtyEeFENkMpj7zEc/50HBGKObpEVi7aHbH20DXFmMtKI j5Ye6Q0Jb3MZ/Bc4lEimHGcwbww4i61KEMSt2v4fU4yU69t9/f7I1JVnqsNIlJ31MpRi zlrFQhXKw9Y/Qcy62giD6L6Oa6TtaJctIyxJr0IdVa7dB6tTM4F3rNvO4P2/z/YybHvJ Wh/Y9sNK0c7ufbwReuw+KCs8rzVFeRCLeqSAiRgWFkHxiNAwsJnZPO57CtYNk633Uj4i OoIghtdJ438+DB41+ldNfzaw6I+25YG+x0uS4HKN9H5jqDaXS37+D49J6qxKyT+3w1cn OlZw== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@redhat.com header.s=mimecast20190719 header.b="FfuTT/7y"; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=redhat.com Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id p5-20020a056402074500b0045c98d055a9si17967169edy.459.2022.10.21.08.41.23; Fri, 21 Oct 2022 08:41:48 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@redhat.com header.s=mimecast20190719 header.b="FfuTT/7y"; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=redhat.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230163AbiJUPiJ (ORCPT + 99 others); Fri, 21 Oct 2022 11:38:09 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46592 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230098AbiJUPgl (ORCPT ); Fri, 21 Oct 2022 11:36:41 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B2F4A26D93E for ; Fri, 21 Oct 2022 08:36:30 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1666366589; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=hf23owwXyl4mzv8DXKFj7XQPTlriWIPQsbBxFbBqkTQ=; b=FfuTT/7yAfTYYaz+sgPwyaewRQUTK4Ag02z3esC1m7JgRoXvhzzevlY9Wy4pDBDRNzoYoQ EZTg3jXzixZDgx3UQsTbJlO7yHmAHhl5zo7XNoYp5uSodKZSIXBLchK5TV+9OYzWYYdm0a 1AXsucz1uc+K6RSodJYMlAIF0/rSjs4= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-213-Zh2UNZhJN-mZMORCqRT5gg-1; Fri, 21 Oct 2022 11:36:27 -0400 X-MC-Unique: Zh2UNZhJN-mZMORCqRT5gg-1 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.rdu2.redhat.com [10.11.54.1]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 2EB71800B23; Fri, 21 Oct 2022 15:36:25 +0000 (UTC) Received: from ovpn-192-65.brq.redhat.com (ovpn-192-65.brq.redhat.com [10.40.192.65]) by smtp.corp.redhat.com (Postfix) with ESMTP id AF2B940CA41F; Fri, 21 Oct 2022 15:36:22 +0000 (UTC) From: Vitaly Kuznetsov To: kvm@vger.kernel.org, Paolo Bonzini , Sean Christopherson Cc: Wanpeng Li , Jim Mattson , Michael Kelley , Siddharth Chandrasekaran , Yuan Yao , Maxim Levitsky , linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v12 24/46] KVM: x86: hyper-v: Introduce fast guest_hv_cpuid_has_l2_tlb_flush() check Date: Fri, 21 Oct 2022 17:34:59 +0200 Message-Id: <20221021153521.1216911-25-vkuznets@redhat.com> In-Reply-To: <20221021153521.1216911-1-vkuznets@redhat.com> References: <20221021153521.1216911-1-vkuznets@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.1 on 10.11.54.1 X-Spam-Status: No, score=-2.3 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, RCVD_IN_MSPIKE_H2,SPF_HELO_NONE,SPF_NONE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1747312347467518824?= X-GMAIL-MSGID: =?utf-8?q?1747312347467518824?= Introduce a helper to quickly check if KVM needs to handle VMCALL/VMMCALL from L2 in L0 to process L2 TLB flush requests. Reviewed-by: Maxim Levitsky Signed-off-by: Vitaly Kuznetsov --- arch/x86/kvm/hyperv.h | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/arch/x86/kvm/hyperv.h b/arch/x86/kvm/hyperv.h index 7706e203ff43..bd698eb2bda1 100644 --- a/arch/x86/kvm/hyperv.h +++ b/arch/x86/kvm/hyperv.h @@ -174,6 +174,14 @@ static inline void kvm_hv_vcpu_purge_flush_tlb(struct kvm_vcpu *vcpu) kfifo_reset_out(&tlb_flush_fifo->entries); } +static inline bool guest_hv_cpuid_has_l2_tlb_flush(struct kvm_vcpu *vcpu) +{ + struct kvm_vcpu_hv *hv_vcpu = to_hv_vcpu(vcpu); + + return hv_vcpu && + (hv_vcpu->cpuid_cache.nested_eax & HV_X64_NESTED_DIRECT_FLUSH); +} + static inline bool kvm_hv_is_tlb_flush_hcall(struct kvm_vcpu *vcpu) { struct kvm_vcpu_hv *hv_vcpu = to_hv_vcpu(vcpu);