From patchwork Mon Dec 19 09:47:15 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Paolo Bonzini X-Patchwork-Id: 9479939 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 71700607D3 for ; Mon, 19 Dec 2016 09:49:09 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 75461283F8 for ; Mon, 19 Dec 2016 09:49:09 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 6467B284A5; Mon, 19 Dec 2016 09:49:09 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.3 required=2.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_HI, RCVD_IN_SORBS_SPAM, T_DKIM_INVALID autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 16FFB28451 for ; Mon, 19 Dec 2016 09:49:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755124AbcLSJra (ORCPT ); Mon, 19 Dec 2016 04:47:30 -0500 Received: from mail-wj0-f196.google.com ([209.85.210.196]:33702 "EHLO mail-wj0-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754906AbcLSJr1 (ORCPT ); Mon, 19 Dec 2016 04:47:27 -0500 Received: by mail-wj0-f196.google.com with SMTP id kp2so22778035wjc.0; Mon, 19 Dec 2016 01:47:26 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=sender:from:to:cc:subject:date:message-id:in-reply-to:references; bh=7ZrSUHPqZK0bg9ZLjgLDP68P3CSl4iZ5exFZQqRTNVo=; b=Fk41foSU/dH1B/MFfZBFjcf0PkiNXkoRoqL5eEuYAUkRfj8bfutzw6bWBjpthAbI7l WlDqEc1OpMU8+0jchAJBk9bvtqNRH2Bb5tNXbAtTsHmCQEW6y8oI70KwsjyFpnQFZ68l 8Lf6TydH5wjAsOsHFQFjnWY3cbQkW7KY8OQf75fgG6hk7N/mzN4ctRLWFP8nxK3T/YST qrfGzLl+a9+5JfwHURbZG7M8821667Z4Js0f0pPas5QN5n6gIwq8c/R9Mr222z3YV2wX oHZJuIbyPi3PZtTyapakEGyUUrwcQJqx+8N6FeIaddauSms1RtbGqCUa8tYbg0m4LYvL 2zcw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:from:to:cc:subject:date:message-id :in-reply-to:references; bh=7ZrSUHPqZK0bg9ZLjgLDP68P3CSl4iZ5exFZQqRTNVo=; b=eblbOhsK59/c9j3mJDRB+ELxEXH7JrDA9OUjr9wJzd8v57hCk9teG9EO6vbg/u4nUE 3WyZAvaV2OlMu6xSMxupDMMyCsRdnlqsynjP2UExoDE0aV0tH4FrT9reIynsxIv0yaOY Gb6QFkn+MA+3LFkcZLUa8AXrBJV5GzW3FiDaksvxygfqPkTpJjI6MrePKHgeoz+hvFMX H7IEkeq6Z2hxnikAJGQALux/+K4OSgMeDigpHjg9TrBY3QSfSd83XdLeEUjmye/EDy3H ldefQ5bgm9OayDa0hWy2ijfqxRiaGJn9fweQBJ6A9qcx7PTyLnmeoehQgvXLOeqN/dzi yf9g== X-Gm-Message-State: AIkVDXJPK9jVeflbvmXBI+Qc2HpvZPf8tQpguY5qwJVk2xV8+f7HVqGEU8PwxmZCcpYvCg== X-Received: by 10.194.137.104 with SMTP id qh8mr12922398wjb.69.1482140845313; Mon, 19 Dec 2016 01:47:25 -0800 (PST) Received: from 640k.lan (94-39-188-115.adsl-ull.clienti.tiscali.it. [94.39.188.115]) by smtp.gmail.com with ESMTPSA id g73sm16375189wme.16.2016.12.19.01.47.24 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 19 Dec 2016 01:47:24 -0800 (PST) From: Paolo Bonzini To: linux-kernel@vger.kernel.org, kvm@vger.kernel.org Cc: rkrcmar@redhat.com, rkagan@virtuozzo.com, dplotnikov@virtuozzo.com Subject: [PATCH 3/6] KVM: vmx: speed up TPR below threshold vmexits Date: Mon, 19 Dec 2016 10:47:15 +0100 Message-Id: <1482140838-6303-4-git-send-email-pbonzini@redhat.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1482140838-6303-1-git-send-email-pbonzini@redhat.com> References: <1482140838-6303-1-git-send-email-pbonzini@redhat.com> Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Since we're already in VCPU context, all we have to do here is recompute the PPR value. That will in turn generate a KVM_REQ_EVENT if necessary. Signed-off-by: Paolo Bonzini --- arch/x86/kvm/lapic.c | 6 ++++++ arch/x86/kvm/lapic.h | 1 + arch/x86/kvm/vmx.c | 2 +- 3 files changed, 8 insertions(+), 1 deletion(-) diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c index 70c7428b7a57..ae59e655cd6d 100644 --- a/arch/x86/kvm/lapic.c +++ b/arch/x86/kvm/lapic.c @@ -595,6 +595,12 @@ static void apic_update_ppr(struct kvm_lapic *apic) } } +void kvm_apic_update_ppr(struct kvm_vcpu *vcpu) +{ + apic_update_ppr(vcpu->arch.apic); +} +EXPORT_SYMBOL_GPL(kvm_apic_update_ppr); + static void apic_set_tpr(struct kvm_lapic *apic, u32 tpr) { kvm_lapic_set_reg(apic, APIC_TASKPRI, tpr); diff --git a/arch/x86/kvm/lapic.h b/arch/x86/kvm/lapic.h index cb16e6fd2330..5b5b1ba644cb 100644 --- a/arch/x86/kvm/lapic.h +++ b/arch/x86/kvm/lapic.h @@ -73,6 +73,7 @@ bool kvm_apic_match_dest(struct kvm_vcpu *vcpu, struct kvm_lapic *source, void __kvm_apic_update_irr(u32 *pir, void *regs); void kvm_apic_update_irr(struct kvm_vcpu *vcpu, u32 *pir); +void kvm_apic_update_ppr(struct kvm_vcpu *vcpu); int kvm_apic_set_irq(struct kvm_vcpu *vcpu, struct kvm_lapic_irq *irq, struct dest_map *dest_map); int kvm_apic_local_deliver(struct kvm_lapic *apic, int lvt_type); diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index 24db5fb6f575..5fb54e3de061 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -6158,7 +6158,7 @@ static int handle_wrmsr(struct kvm_vcpu *vcpu) static int handle_tpr_below_threshold(struct kvm_vcpu *vcpu) { - kvm_make_request(KVM_REQ_EVENT, vcpu); + kvm_apic_update_ppr(vcpu); return 1; }