From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752753AbdHGIrB (ORCPT ); Mon, 7 Aug 2017 04:47:01 -0400 Received: from szxga04-in.huawei.com ([45.249.212.190]:3015 "EHLO szxga04-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752655AbdHGIq5 (ORCPT ); Mon, 7 Aug 2017 04:46:57 -0400 From: "Longpeng(Mike)" To: , CC: , , , , , , , , , , , , , "Longpeng(Mike)" Subject: [PATCH 3/3] KVM: implement spinlock optimization logic for arm/s390 Date: Mon, 7 Aug 2017 16:44:26 +0800 Message-ID: <1502095466-21312-4-git-send-email-longpeng2@huawei.com> X-Mailer: git-send-email 1.8.4.msysgit.0 In-Reply-To: <1502095466-21312-1-git-send-email-longpeng2@huawei.com> References: <1502095466-21312-1-git-send-email-longpeng2@huawei.com> MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.177.246.209] X-CFilter-Loop: Reflected X-Mirapoint-Virus-RAPID-Raw: score=unknown(0), refid=str=0001.0A020205.598828FE.00BB,ss=1,re=0.000,recu=0.000,reip=0.000,cl=1,cld=1,fgs=0, ip=0.0.0.0, so=2014-11-16 11:51:01, dmn=2013-03-21 17:37:32 X-Mirapoint-Loop-Id: 96139f11928dd09d513df6708480d358 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Implements the kvm_arch_vcpu_spin/preempt_in_kernel() for arm/s390, they needn't cache the result. Signed-off-by: Longpeng(Mike) --- arch/s390/kvm/kvm-s390.c | 4 ++-- virt/kvm/arm/arm.c | 4 ++-- 2 files changed, 4 insertions(+), 4 deletions(-) diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c index f78cdc2..49b9178 100644 --- a/arch/s390/kvm/kvm-s390.c +++ b/arch/s390/kvm/kvm-s390.c @@ -2449,12 +2449,12 @@ int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu) bool kvm_arch_vcpu_spin_in_kernel(struct kvm_vcpu *vcpu) { - return false; + return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE); } bool kvm_arch_vcpu_preempt_in_kernel(struct kvm_vcpu *vcpu) { - return false; + return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE); } void kvm_s390_vcpu_block(struct kvm_vcpu *vcpu) diff --git a/virt/kvm/arm/arm.c b/virt/kvm/arm/arm.c index e45f780..956f025 100644 --- a/virt/kvm/arm/arm.c +++ b/virt/kvm/arm/arm.c @@ -418,12 +418,12 @@ int kvm_arch_vcpu_runnable(struct kvm_vcpu *v) bool kvm_arch_vcpu_spin_in_kernel(struct kvm_vcpu *vcpu) { - return false; + return vcpu_mode_priv(vcpu); } bool kvm_arch_vcpu_preempt_in_kernel(struct kvm_vcpu *vcpu) { - return false; + return vcpu_mode_priv(vcpu); } /* Just ensure a guest exit from a particular CPU */ -- 1.8.3.1