From patchwork Sat Oct 9 02:12:35 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sean Christopherson X-Patchwork-Id: 12546951 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 09A1AC433EF for ; Sat, 9 Oct 2021 02:17:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E5F7E61038 for ; Sat, 9 Oct 2021 02:17:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S244662AbhJICT3 (ORCPT ); Fri, 8 Oct 2021 22:19:29 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38368 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S244364AbhJICTG (ORCPT ); Fri, 8 Oct 2021 22:19:06 -0400 Received: from mail-yb1-xb4a.google.com (mail-yb1-xb4a.google.com [IPv6:2607:f8b0:4864:20::b4a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 98F53C0612EF for ; Fri, 8 Oct 2021 19:14:25 -0700 (PDT) Received: by mail-yb1-xb4a.google.com with SMTP id b5-20020a251b05000000b005b575f23711so15171621ybb.4 for ; Fri, 08 Oct 2021 19:14:25 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=reply-to:date:in-reply-to:message-id:mime-version:references :subject:from:to:cc; bh=AlVgPkgkFYp3mdA0c8FeIFPE9R3iQYYLs6SQdF7DS7Y=; b=iyDWCxyALAJzTmrUWpKD0hm+MQGe0JbvQFQ+gPVY/mUdPcOBuJRTdijBOEaFZ+LAAb SDTgJ4oxCKVVc0nNYZIMuAMtCs0uQECNKotNLEWLcodTtHGOERifCGz75XQaYTAh1vxX neHo9EJwZRaNOXzY5g4EMe8hM39Md1Iy0bRnoPVZCfJilexl2bbxOCi5VnE5sdolV6eU NSIZQhgHuO3ZxoxUovFoBRAFe5hP7ZvZYuCsNm5sISOiG6xvPYGa1WB0B6RyfZX8HQo6 K97euHgjPX8JD6ljBA2834wXcBVVic3DkNPl89wT3euIRZ1CjF3KG79BaaaEoSx95D/a coZw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:reply-to:date:in-reply-to:message-id :mime-version:references:subject:from:to:cc; bh=AlVgPkgkFYp3mdA0c8FeIFPE9R3iQYYLs6SQdF7DS7Y=; b=62cMvO0XmuHQJRCRUeIFCuc8rCh06jnyylYhC9SaNW518foLJZ8Fr+rT6UYC529ZBU f6QlD1XH3P06I3OZoWGVCUXkDu8+F7XOHZQrig6g1If3TeJJ4YCREeFZgQNLyu9QpppO XT05TOq3a87OvJHD3XIIzYtQeNCDwBXRZ8ad4KVN6RftR6JVoLjrlpcTcT8gWYR6nAuI 0XLtcWbWrVvHiSSYnkm/5a/UZy1ECn8lOlDrGBHlfpodi5Q9LM/LcncU8kwvJcObE5VN NA2WDxK3otzyrvkzkUjeaJyvKuT5dljbR2VF+odgq3BFsiRbnFf1jHVRdgitHh9EV84H n9RA== X-Gm-Message-State: AOAM533VbGzLDJ/EheiUQPlYyYAu9yPPal4gKm0vdLdgL/O+z5Q3FcHy +U8x6tvsC2aHgRz2g6SJzgGgZgY2GLY= X-Google-Smtp-Source: ABdhPJwCGOH/vSNpBFtQULwIni84FKIaJWE8Z3rFyAmS2+NcdTac9rCKWh3u0VdnxrDvnUeBFYVQOv64tnI= X-Received: from seanjc798194.pdx.corp.google.com ([2620:15c:90:200:e39b:6333:b001:cb]) (user=seanjc job=sendgmr) by 2002:a25:6908:: with SMTP id e8mr6568722ybc.337.1633745664741; Fri, 08 Oct 2021 19:14:24 -0700 (PDT) Reply-To: Sean Christopherson Date: Fri, 8 Oct 2021 19:12:35 -0700 In-Reply-To: <20211009021236.4122790-1-seanjc@google.com> Message-Id: <20211009021236.4122790-43-seanjc@google.com> Mime-Version: 1.0 References: <20211009021236.4122790-1-seanjc@google.com> X-Mailer: git-send-email 2.33.0.882.g93a45727a2-goog Subject: [PATCH v2 42/43] KVM: VMX: Fold fallback path into triggering posted IRQ helper From: Sean Christopherson To: Marc Zyngier , Huacai Chen , Aleksandar Markovic , Paul Mackerras , Anup Patel , Paul Walmsley , Palmer Dabbelt , Albert Ou , Christian Borntraeger , Janosch Frank , Paolo Bonzini Cc: James Morse , Alexandru Elisei , Suzuki K Poulose , Atish Patra , David Hildenbrand , Cornelia Huck , Claudio Imbrenda , Sean Christopherson , Vitaly Kuznetsov , Wanpeng Li , Jim Mattson , Joerg Roedel , linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, linux-mips@vger.kernel.org, kvm@vger.kernel.org, kvm-ppc@vger.kernel.org, kvm-riscv@lists.infradead.org, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, David Matlack , Oliver Upton , Jing Zhang Precedence: bulk List-ID: X-Mailing-List: linux-mips@vger.kernel.org Move the fallback "wake_up" path into the helper to trigger posted interrupt helper now that the nested and non-nested paths are identical. No functional change intended. Signed-off-by: Sean Christopherson Reviewed-by: Maxim Levitsky --- arch/x86/kvm/vmx/vmx.c | 18 ++++++++++-------- 1 file changed, 10 insertions(+), 8 deletions(-) diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c index f505fee3cf5c..b0d97cf18c34 100644 --- a/arch/x86/kvm/vmx/vmx.c +++ b/arch/x86/kvm/vmx/vmx.c @@ -3927,7 +3927,7 @@ static void vmx_msr_filter_changed(struct kvm_vcpu *vcpu) pt_update_intercept_for_msr(vcpu); } -static inline bool kvm_vcpu_trigger_posted_interrupt(struct kvm_vcpu *vcpu, +static inline void kvm_vcpu_trigger_posted_interrupt(struct kvm_vcpu *vcpu, int pi_vec) { #ifdef CONFIG_SMP @@ -3958,10 +3958,15 @@ static inline bool kvm_vcpu_trigger_posted_interrupt(struct kvm_vcpu *vcpu, */ apic->send_IPI_mask(get_cpu_mask(vcpu->cpu), pi_vec); - return true; + return; } #endif - return false; + /* + * The vCPU isn't in the guest; wake the vCPU in case it is blocking, + * otherwise do nothing as KVM will grab the highest priority pending + * IRQ via ->sync_pir_to_irr() in vcpu_enter_guest(). + */ + kvm_vcpu_wake_up(vcpu); } static int vmx_deliver_nested_posted_interrupt(struct kvm_vcpu *vcpu, @@ -3984,8 +3989,7 @@ static int vmx_deliver_nested_posted_interrupt(struct kvm_vcpu *vcpu, */ kvm_make_request(KVM_REQ_EVENT, vcpu); /* the PIR and ON have been set by L1. */ - if (!kvm_vcpu_trigger_posted_interrupt(vcpu, POSTED_INTR_NESTED_VECTOR)) - kvm_vcpu_wake_up(vcpu); + kvm_vcpu_trigger_posted_interrupt(vcpu, POSTED_INTR_NESTED_VECTOR); return 0; } return -1; @@ -4022,9 +4026,7 @@ static int vmx_deliver_posted_interrupt(struct kvm_vcpu *vcpu, int vector) * guaranteed to see PID.ON=1 and sync the PIR to IRR if triggering a * posted interrupt "fails" because vcpu->mode != IN_GUEST_MODE. */ - if (!kvm_vcpu_trigger_posted_interrupt(vcpu, POSTED_INTR_VECTOR)) - kvm_vcpu_wake_up(vcpu); - + kvm_vcpu_trigger_posted_interrupt(vcpu, POSTED_INTR_VECTOR); return 0; }