From nobody Fri Apr 3 23:51:58 2026 Received: from mail.loongson.cn (mail.loongson.cn [114.242.206.163]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 0E22C28C2A1; Mon, 23 Mar 2026 02:56:17 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=114.242.206.163 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774234581; cv=none; b=MKgTDCoMk7W/AxRHlNLDNOSAp+yy9GIdmZGa4Yl6rmYTecsfFbbpm5sFPOlHVAj8PfmGD0a27krH5gi/SHXDPew2dD5HdUCFVXPtxO8ktdXE2qjaozvhw1YgGkvNNVaevWqx1hcsQl+gmacyqEgWeJ3JjuDJBswh++KWIacS0x8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774234581; c=relaxed/simple; bh=omcBfFSmTGtKmubn8NNmh/ELlSQUrctCVpJbJ/JNpas=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=TCyqz8ObAJmU4DeKKjlac06yXJH7pUI5rO94CjDB802NvHfcQelR/dBlADPQZ7/clXgfJghpwp0VkvEddJw+95TVnMPaG+bRiw/mgj/k6rNvVyxs6QOJxPp4Q/iSM5g16zaUlUxHN0LMehJpl1fbkJr8gyKyLXDQkTAjofMNZhk= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=loongson.cn; spf=pass smtp.mailfrom=loongson.cn; arc=none smtp.client-ip=114.242.206.163 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=loongson.cn Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=loongson.cn Received: from loongson.cn (unknown [10.2.5.213]) by gateway (Coremail) with SMTP id _____8Dx7qnQq8Bpm6YdAA--.25527S3; Mon, 23 Mar 2026 10:56:16 +0800 (CST) Received: from localhost.localdomain (unknown [10.2.5.213]) by front1 (Coremail) with SMTP id qMiowJBxbcLOq8Bpcg5bAA--.40805S3; Mon, 23 Mar 2026 10:56:15 +0800 (CST) From: Bibo Mao To: Tianrui Zhao , Huacai Chen Cc: kernel@xen0n.name, kvm@vger.kernel.org, loongarch@lists.linux.dev, linux-kernel@vger.kernel.org, Juergen Gross Subject: [PATCH v3 1/4] LoongArch: KVM: Add kvm_request_pending checking in kvm_late_check_requests() Date: Mon, 23 Mar 2026 10:56:10 +0800 Message-Id: <20260323025613.3260876-2-maobibo@loongson.cn> X-Mailer: git-send-email 2.39.3 In-Reply-To: <20260323025613.3260876-1-maobibo@loongson.cn> References: <20260323025613.3260876-1-maobibo@loongson.cn> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CM-TRANSID: qMiowJBxbcLOq8Bpcg5bAA--.40805S3 X-CM-SenderInfo: xpdruxter6z05rqj20fqof0/ X-Coremail-Antispam: 1Uk129KBjDUn29KB7ZKAUJUUUUU529EdanIXcx71UUUUU7KY7 ZEXasCq-sGcSsGvfJ3UbIjqfuFe4nvWSU5nxnvy29KBjDU0xBIdaVrnUUvcSsGvfC2Kfnx nUUI43ZEXa7xR_UUUUUUUUU== Content-Type: text/plain; charset="utf-8" Add kvm_request_pending() checking firstly in kvm_late_check_requests(), at most time there is no pending request, the following pending bit checking can be skipped then. Also move function kvm_check_pmu() in kvm_late_check_requests(), and put it after kvm_request_pending() checking. Signed-off-by: Bibo Mao --- arch/loongarch/kvm/vcpu.c | 17 ++++++++--------- 1 file changed, 8 insertions(+), 9 deletions(-) diff --git a/arch/loongarch/kvm/vcpu.c b/arch/loongarch/kvm/vcpu.c index 8ffd50a470e6..028eb3d5a33b 100644 --- a/arch/loongarch/kvm/vcpu.c +++ b/arch/loongarch/kvm/vcpu.c @@ -149,14 +149,6 @@ static void kvm_lose_pmu(struct kvm_vcpu *vcpu) kvm_restore_host_pmu(vcpu); } =20 -static void kvm_check_pmu(struct kvm_vcpu *vcpu) -{ - if (kvm_check_request(KVM_REQ_PMU, vcpu)) { - kvm_own_pmu(vcpu); - vcpu->arch.aux_inuse |=3D KVM_LARCH_PMU; - } -} - static void kvm_update_stolen_time(struct kvm_vcpu *vcpu) { u32 version; @@ -232,6 +224,14 @@ static int kvm_check_requests(struct kvm_vcpu *vcpu) static void kvm_late_check_requests(struct kvm_vcpu *vcpu) { lockdep_assert_irqs_disabled(); + if (!kvm_request_pending(vcpu)) + return; + + if (kvm_check_request(KVM_REQ_PMU, vcpu)) { + kvm_own_pmu(vcpu); + vcpu->arch.aux_inuse |=3D KVM_LARCH_PMU; + } + if (kvm_check_request(KVM_REQ_TLB_FLUSH_GPA, vcpu)) if (vcpu->arch.flush_gpa !=3D INVALID_GPA) { kvm_flush_tlb_gpa(vcpu, vcpu->arch.flush_gpa); @@ -312,7 +312,6 @@ static int kvm_pre_enter_guest(struct kvm_vcpu *vcpu) /* Make sure the vcpu mode has been written */ smp_store_mb(vcpu->mode, IN_GUEST_MODE); kvm_check_vpid(vcpu); - kvm_check_pmu(vcpu); =20 /* * Called after function kvm_check_vpid() --=20 2.39.3