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=-16.5 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=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 7BDCEC433ED for ; Wed, 12 May 2021 00:01:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 54C2461205 for ; Wed, 12 May 2021 00:01:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229948AbhELACl (ORCPT ); Tue, 11 May 2021 20:02:41 -0400 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:20156 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229920AbhELACj (ORCPT ); Tue, 11 May 2021 20:02:39 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1620777692; 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: references:references; bh=xrhUqBJUijGQwgB+DReNzr5ztKeOOykMqFsLk66ZLKY=; b=ZvduJ/CnKUaAzAy2JTuHEFfSS6R8/zMGMRd2yatKnuZzUKY8m4HDSbpAmJylfzJ/QaGg3U gt8CSLHW5suFGk2pUNzZA+4REwGtcfnGyZ5awNZz6ErGObRJSISfjv7/qR7CUr2TwiPL69 oEc4XB5rycatCPSTwrMYKD6XmuTuymg= 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-553-bnUeGVsUOFOq_4BYMr4UHA-1; Tue, 11 May 2021 20:01:30 -0400 X-MC-Unique: bnUeGVsUOFOq_4BYMr4UHA-1 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 36C7E107ACC7; Wed, 12 May 2021 00:01:29 +0000 (UTC) Received: from fuller.cnet (ovpn-112-2.gru2.redhat.com [10.97.112.2]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 28B2F2B431; Wed, 12 May 2021 00:01:25 +0000 (UTC) Received: by fuller.cnet (Postfix, from userid 1000) id 8805643F79CA; Tue, 11 May 2021 21:01:20 -0300 (-03) Message-ID: <20210512000101.895392564@redhat.com> User-Agent: quilt/0.66 Date: Tue, 11 May 2021 20:57:39 -0300 From: Marcelo Tosatti To: kvm@vger.kernel.org Cc: Paolo Bonzini , Alex Williamson , Sean Christopherson , Peter Xu , Marcelo Tosatti Subject: [patch 1/4] KVM: x86: add start_assignment hook to kvm_x86_ops References: <20210511235738.333950860@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Add a start_assignment hook to kvm_x86_ops, which is called when kvm_arch_start_assignment is done. The hook is required to update the wakeup vector of a sleeping vCPU when a device is assigned to the guest. Signed-off-by: Marcelo Tosatti Index: kvm/arch/x86/include/asm/kvm_host.h =================================================================== --- kvm.orig/arch/x86/include/asm/kvm_host.h +++ kvm/arch/x86/include/asm/kvm_host.h @@ -1322,6 +1322,7 @@ struct kvm_x86_ops { int (*update_pi_irte)(struct kvm *kvm, unsigned int host_irq, uint32_t guest_irq, bool set); + void (*start_assignment)(struct kvm *kvm); void (*apicv_post_state_restore)(struct kvm_vcpu *vcpu); bool (*dy_apicv_has_pending_interrupt)(struct kvm_vcpu *vcpu); Index: kvm/arch/x86/kvm/x86.c =================================================================== --- kvm.orig/arch/x86/kvm/x86.c +++ kvm/arch/x86/kvm/x86.c @@ -11295,7 +11295,8 @@ bool kvm_arch_can_dequeue_async_page_pre void kvm_arch_start_assignment(struct kvm *kvm) { - atomic_inc(&kvm->arch.assigned_device_count); + if (atomic_inc_return(&kvm->arch.assigned_device_count) == 1) + static_call_cond(kvm_x86_start_assignment)(kvm); } EXPORT_SYMBOL_GPL(kvm_arch_start_assignment); Index: kvm/arch/x86/include/asm/kvm-x86-ops.h =================================================================== --- kvm.orig/arch/x86/include/asm/kvm-x86-ops.h +++ kvm/arch/x86/include/asm/kvm-x86-ops.h @@ -99,6 +99,7 @@ KVM_X86_OP_NULL(post_block) KVM_X86_OP_NULL(vcpu_blocking) KVM_X86_OP_NULL(vcpu_unblocking) KVM_X86_OP_NULL(update_pi_irte) +KVM_X86_OP_NULL(start_assignment) KVM_X86_OP_NULL(apicv_post_state_restore) KVM_X86_OP_NULL(dy_apicv_has_pending_interrupt) KVM_X86_OP_NULL(set_hv_timer)