From patchwork Tue May 11 23:57:39 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marcelo Tosatti X-Patchwork-Id: 12252409 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 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 Reviewed-by: Peter Xu 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) From patchwork Tue May 11 23:57:40 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marcelo Tosatti X-Patchwork-Id: 12252413 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 7939DC433ED for ; Wed, 12 May 2021 00:01:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5044461205 for ; Wed, 12 May 2021 00:01:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230005AbhELACp (ORCPT ); Tue, 11 May 2021 20:02:45 -0400 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:42997 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229920AbhELACp (ORCPT ); Tue, 11 May 2021 20:02:45 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1620777697; 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=3szDupmhb5P3gzH2roiv5CqgjhCLQjU+Y1Q5biEIpRs=; b=CXPtwxdJ4W6GtAVnuOgrEWm4paoJY7LXixslbjdUYywHfH1+kMg9ICyaJCtaIFUn82CY3k h2oS+invwBN6xOGoQgasDx3w7Qhgiud54j5evaS6RUuS5AfR3cHph/yqVVvmGgyBM8cLmc xr85wyT3Lt+76mx4yKaxmNHd42CEab0= 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-61-Tt53-dzwOemUvRpNhYlW-w-1; Tue, 11 May 2021 20:01:36 -0400 X-MC-Unique: Tt53-dzwOemUvRpNhYlW-w-1 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 4441F801107; Wed, 12 May 2021 00:01:35 +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 3A6615D6A8; Wed, 12 May 2021 00:01:25 +0000 (UTC) Received: by fuller.cnet (Postfix, from userid 1000) id 8A39043F79E7; Tue, 11 May 2021 21:01:20 -0300 (-03) Message-ID: <20210512000101.924703332@redhat.com> User-Agent: quilt/0.66 Date: Tue, 11 May 2021 20:57:40 -0300 From: Marcelo Tosatti To: kvm@vger.kernel.org Cc: Paolo Bonzini , Alex Williamson , Sean Christopherson , Peter Xu , Marcelo Tosatti Subject: [patch 2/4] KVM: add arch specific vcpu_check_block callback References: <20210511235738.333950860@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Add callback in kvm_vcpu_check_block, so that architectures can direct a vcpu to exit the vcpu block loop without requiring events that would unhalt it. Signed-off-by: Marcelo Tosatti Index: kvm/include/linux/kvm_host.h =================================================================== --- kvm.orig/include/linux/kvm_host.h +++ kvm/include/linux/kvm_host.h @@ -971,6 +971,13 @@ static inline int kvm_arch_flush_remote_ } #endif +#ifndef __KVM_HAVE_ARCH_VCPU_CHECK_BLOCK +static inline int kvm_arch_vcpu_check_block(struct kvm_vcpu *vcpu) +{ + return 0; +} +#endif + #ifdef __KVM_HAVE_ARCH_NONCOHERENT_DMA void kvm_arch_register_noncoherent_dma(struct kvm *kvm); void kvm_arch_unregister_noncoherent_dma(struct kvm *kvm); Index: kvm/virt/kvm/kvm_main.c =================================================================== --- kvm.orig/virt/kvm/kvm_main.c +++ kvm/virt/kvm/kvm_main.c @@ -2794,6 +2794,8 @@ static int kvm_vcpu_check_block(struct k goto out; if (signal_pending(current)) goto out; + if (kvm_arch_vcpu_check_block(vcpu)) + goto out; ret = 0; out: From patchwork Tue May 11 23:57:41 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marcelo Tosatti X-Patchwork-Id: 12252415 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 B4BA8C43460 for ; Wed, 12 May 2021 00:01:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8A76D611BE for ; Wed, 12 May 2021 00:01:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230012AbhELACr (ORCPT ); Tue, 11 May 2021 20:02:47 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:53078 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229920AbhELACr (ORCPT ); Tue, 11 May 2021 20:02:47 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1620777699; 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=6iQcJfFQ9PAT1toBR712mVEA6YqxpgzftwpN0mudfKw=; b=E9XmotiwuIzOCpj6uK4PzST0st3eFxUXtBCt8hLXZus475XxLM40i4CrjW1U3SY1CxhIyt EFBQs/FechdvCVCaqMHLrjDMRmwxZvxEUX6KwTiFiiyHgt3fy6ZW2PKIvfVcD7J0qtGsq2 8OBRoATsEsoReQ+fjvFCniqKPQwwnxs= 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-284-cZVet68sNzmIDnYxpiIDgA-1; Tue, 11 May 2021 20:01:36 -0400 X-MC-Unique: cZVet68sNzmIDnYxpiIDgA-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 505091005D51; Wed, 12 May 2021 00:01:35 +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 28D3F101F501; Wed, 12 May 2021 00:01:25 +0000 (UTC) Received: by fuller.cnet (Postfix, from userid 1000) id 8EDA843F79E8; Tue, 11 May 2021 21:01:20 -0300 (-03) Message-ID: <20210512000101.954011777@redhat.com> User-Agent: quilt/0.66 Date: Tue, 11 May 2021 20:57:41 -0300 From: Marcelo Tosatti To: kvm@vger.kernel.org Cc: Paolo Bonzini , Alex Williamson , Sean Christopherson , Peter Xu , Marcelo Tosatti Subject: [patch 3/4] KVM: x86: implement kvm_arch_vcpu_check_block callback References: <20210511235738.333950860@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Implement kvm_arch_vcpu_check_block for x86. Next patch will add implementation of kvm_x86_ops.vcpu_check_block for VMX. 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 @@ -1320,6 +1320,8 @@ struct kvm_x86_ops { void (*vcpu_blocking)(struct kvm_vcpu *vcpu); void (*vcpu_unblocking)(struct kvm_vcpu *vcpu); + int (*vcpu_check_block)(struct kvm_vcpu *vcpu); + int (*update_pi_irte)(struct kvm *kvm, unsigned int host_irq, uint32_t guest_irq, bool set); void (*start_assignment)(struct kvm *kvm); @@ -1801,6 +1803,15 @@ static inline bool kvm_irq_is_postable(s irq->delivery_mode == APIC_DM_LOWEST); } +#define __KVM_HAVE_ARCH_VCPU_CHECK_BLOCK +static inline int kvm_arch_vcpu_check_block(struct kvm_vcpu *vcpu) +{ + if (kvm_x86_ops.vcpu_check_block) + return static_call(kvm_x86_vcpu_check_block)(vcpu); + + return 0; +} + static inline void kvm_arch_vcpu_blocking(struct kvm_vcpu *vcpu) { static_call_cond(kvm_x86_vcpu_blocking)(vcpu); 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 @@ -98,6 +98,7 @@ KVM_X86_OP_NULL(pre_block) KVM_X86_OP_NULL(post_block) KVM_X86_OP_NULL(vcpu_blocking) KVM_X86_OP_NULL(vcpu_unblocking) +KVM_X86_OP_NULL(vcpu_check_block) KVM_X86_OP_NULL(update_pi_irte) KVM_X86_OP_NULL(start_assignment) KVM_X86_OP_NULL(apicv_post_state_restore) From patchwork Tue May 11 23:57:42 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marcelo Tosatti X-Patchwork-Id: 12252411 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 152B4C43461 for ; Wed, 12 May 2021 00:01:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id DE8A061919 for ; Wed, 12 May 2021 00:01:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229973AbhELACn (ORCPT ); Tue, 11 May 2021 20:02:43 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:34477 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229920AbhELACm (ORCPT ); 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Wed, 12 May 2021 00:01:32 +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 317062B59A; Wed, 12 May 2021 00:01:25 +0000 (UTC) Received: by fuller.cnet (Postfix, from userid 1000) id 92CFE43F79E9; Tue, 11 May 2021 21:01:20 -0300 (-03) Message-ID: <20210512000101.983424761@redhat.com> User-Agent: quilt/0.66 Date: Tue, 11 May 2021 20:57:42 -0300 From: Marcelo Tosatti To: kvm@vger.kernel.org Cc: Paolo Bonzini , Alex Williamson , Sean Christopherson , Peter Xu , Pei Zhang , Marcelo Tosatti Subject: [patch 4/4] KVM: VMX: update vcpu posted-interrupt descriptor when assigning device References: <20210511235738.333950860@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.23 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org For VMX, when a vcpu enters HLT emulation, pi_post_block will: 1) Add vcpu to per-cpu list of blocked vcpus. 2) Program the posted-interrupt descriptor "notification vector" to POSTED_INTR_WAKEUP_VECTOR With interrupt remapping, an interrupt will set the PIR bit for the vector programmed for the device on the CPU, test-and-set the ON bit on the posted interrupt descriptor, and if the ON bit is clear generate an interrupt for the notification vector. This way, the target CPU wakes upon a device interrupt and wakes up the target vcpu. Problem is that pi_post_block only programs the notification vector if kvm_arch_has_assigned_device() is true. Its possible for the following to happen: 1) vcpu V HLTs on pcpu P, kvm_arch_has_assigned_device is false, notification vector is not programmed 2) device is assigned to VM 3) device interrupts vcpu V, sets ON bit (notification vector not programmed, so pcpu P remains in idle) 4) vcpu 0 IPIs vcpu V (in guest), but since pi descriptor ON bit is set, kvm_vcpu_kick is skipped 5) vcpu 0 busy spins on vcpu V's response for several seconds, until RCU watchdog NMIs all vCPUs. To fix this, use the start_assignment kvm_x86_ops callback to kick vcpus out of the halt loop, so the notification vector is properly reprogrammed to the wakeup vector. Reported-by: Pei Zhang Signed-off-by: Marcelo Tosatti Index: kvm/arch/x86/kvm/vmx/posted_intr.c =================================================================== --- kvm.orig/arch/x86/kvm/vmx/posted_intr.c +++ kvm/arch/x86/kvm/vmx/posted_intr.c @@ -204,6 +204,32 @@ void pi_post_block(struct kvm_vcpu *vcpu } /* + * Bail out of the block loop if the VM has an assigned + * device, but the blocking vCPU didn't reconfigure the + * PI.NV to the wakeup vector, i.e. the assigned device + * came along after the initial check in vcpu_block(). + */ + +int vmx_vcpu_check_block(struct kvm_vcpu *vcpu) +{ + struct pi_desc *pi_desc = vcpu_to_pi_desc(vcpu); + + if (!irq_remapping_cap(IRQ_POSTING_CAP)) + return 0; + + if (!kvm_vcpu_apicv_active(vcpu)) + return 0; + + if (!kvm_arch_has_assigned_device(vcpu->kvm)) + return 0; + + if (pi_desc->nv == POSTED_INTR_WAKEUP_VECTOR) + return 0; + + return 1; +} + +/* * Handler for POSTED_INTERRUPT_WAKEUP_VECTOR. */ void pi_wakeup_handler(void) @@ -236,6 +262,25 @@ bool pi_has_pending_interrupt(struct kvm (pi_test_sn(pi_desc) && !pi_is_pir_empty(pi_desc)); } +void vmx_pi_start_assignment(struct kvm *kvm) +{ + struct kvm_vcpu *vcpu; + int i; + + if (!irq_remapping_cap(IRQ_POSTING_CAP)) + return; + + /* + * Wakeup will cause the vCPU to bail out of kvm_vcpu_block() and + * go back through vcpu_block(). + */ + kvm_for_each_vcpu(i, vcpu, kvm) { + if (!kvm_vcpu_apicv_active(vcpu)) + continue; + + kvm_vcpu_wake_up(vcpu); + } +} /* * pi_update_irte - set IRTE for Posted-Interrupts Index: kvm/arch/x86/kvm/vmx/posted_intr.h =================================================================== --- kvm.orig/arch/x86/kvm/vmx/posted_intr.h +++ kvm/arch/x86/kvm/vmx/posted_intr.h @@ -95,5 +95,7 @@ void __init pi_init_cpu(int cpu); bool pi_has_pending_interrupt(struct kvm_vcpu *vcpu); int pi_update_irte(struct kvm *kvm, unsigned int host_irq, uint32_t guest_irq, bool set); +void vmx_pi_start_assignment(struct kvm *kvm); +int vmx_vcpu_check_block(struct kvm_vcpu *vcpu); #endif /* __KVM_X86_VMX_POSTED_INTR_H */ Index: kvm/arch/x86/kvm/vmx/vmx.c =================================================================== --- kvm.orig/arch/x86/kvm/vmx/vmx.c +++ kvm/arch/x86/kvm/vmx/vmx.c @@ -7727,11 +7727,13 @@ static struct kvm_x86_ops vmx_x86_ops __ .pre_block = vmx_pre_block, .post_block = vmx_post_block, + .vcpu_check_block = vmx_vcpu_check_block, .pmu_ops = &intel_pmu_ops, .nested_ops = &vmx_nested_ops, .update_pi_irte = pi_update_irte, + .start_assignment = vmx_pi_start_assignment, #ifdef CONFIG_X86_64 .set_hv_timer = vmx_set_hv_timer,