From patchwork Tue Dec 8 12:47:38 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shannon Zhao X-Patchwork-Id: 7797271 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id D4D50BEEE1 for ; Tue, 8 Dec 2015 12:59:00 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id E634C203C4 for ; Tue, 8 Dec 2015 12:58:59 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id DF30620389 for ; Tue, 8 Dec 2015 12:58:58 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1a6Hp9-0007uc-HC; Tue, 08 Dec 2015 12:56:55 +0000 Received: from merlin.infradead.org ([205.233.59.134]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1a6Hii-0000GB-5L for linux-arm-kernel@bombadil.infradead.org; Tue, 08 Dec 2015 12:50:16 +0000 Received: from szxga03-in.huawei.com ([119.145.14.66]) by merlin.infradead.org with esmtps (Exim 4.85 #2 (Red Hat Linux)) id 1a6Hie-0000py-BR for linux-arm-kernel@lists.infradead.org; Tue, 08 Dec 2015 12:50:14 +0000 Received: from 172.24.1.51 (EHLO SZXEML429-HUB.china.huawei.com) ([172.24.1.51]) by szxrg03-dlp.huawei.com (MOS 4.4.3-GA FastPath queued) with ESMTP id BSJ75058; Tue, 08 Dec 2015 20:48:32 +0800 (CST) Received: from HGHY1Z002260041.china.huawei.com (10.177.16.142) by SZXEML429-HUB.china.huawei.com (10.82.67.184) with Microsoft SMTP Server id 14.3.235.1; Tue, 8 Dec 2015 20:48:21 +0800 From: Shannon Zhao To: , , Subject: [PATCH v6 19/21] KVM: ARM64: Reset PMU state when resetting vcpu Date: Tue, 8 Dec 2015 20:47:38 +0800 Message-ID: <1449578860-15808-20-git-send-email-zhaoshenglong@huawei.com> X-Mailer: git-send-email 1.9.0.msysgit.0 In-Reply-To: <1449578860-15808-1-git-send-email-zhaoshenglong@huawei.com> References: <1449578860-15808-1-git-send-email-zhaoshenglong@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.177.16.142] X-CFilter-Loop: Reflected X-Mirapoint-Virus-RAPID-Raw: score=unknown(0), refid=str=0001.0A090202.5666D1A1.0010, ss=1, re=0.000, recu=0.000, reip=0.000, cl=1, cld=1, fgs=0, ip=0.0.0.0, so=2013-05-26 15:14:31, dmn=2013-03-21 17:37:32 X-Mirapoint-Loop-Id: c318fc1373045e06f0e5ef0e3ff630e4 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20151208_075014_359818_23FB0832 X-CRM114-Status: GOOD ( 11.12 ) X-Spam-Score: -4.2 (----) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: wei@redhat.com, hangaohuai@huawei.com, kvm@vger.kernel.org, will.deacon@arm.com, peter.huangpeng@huawei.com, cov@codeaurora.org, zhaoshenglong@huawei.com, alex.bennee@linaro.org, linux-arm-kernel@lists.infradead.org, shannon.zhao@linaro.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Shannon Zhao When resetting vcpu, it needs to reset the PMU state to initial status. Signed-off-by: Shannon Zhao --- arch/arm64/kvm/reset.c | 3 +++ include/kvm/arm_pmu.h | 2 ++ virt/kvm/arm/pmu.c | 17 +++++++++++++++++ 3 files changed, 22 insertions(+) diff --git a/arch/arm64/kvm/reset.c b/arch/arm64/kvm/reset.c index f34745c..dfbce78 100644 --- a/arch/arm64/kvm/reset.c +++ b/arch/arm64/kvm/reset.c @@ -120,6 +120,9 @@ int kvm_reset_vcpu(struct kvm_vcpu *vcpu) /* Reset system registers */ kvm_reset_sys_regs(vcpu); + /* Reset PMU */ + kvm_pmu_vcpu_reset(vcpu); + /* Reset timer */ return kvm_timer_vcpu_reset(vcpu, cpu_vtimer_irq); } diff --git a/include/kvm/arm_pmu.h b/include/kvm/arm_pmu.h index c4041008..e0f5bfe 100644 --- a/include/kvm/arm_pmu.h +++ b/include/kvm/arm_pmu.h @@ -38,6 +38,7 @@ struct kvm_pmu { }; #ifdef CONFIG_KVM_ARM_PMU +void kvm_pmu_vcpu_reset(struct kvm_vcpu *vcpu); void kvm_pmu_flush_hwstate(struct kvm_vcpu *vcpu); u64 kvm_pmu_get_counter_value(struct kvm_vcpu *vcpu, u32 select_idx); void kvm_pmu_disable_counter(struct kvm_vcpu *vcpu, u32 val); @@ -49,6 +50,7 @@ void kvm_pmu_set_counter_event_type(struct kvm_vcpu *vcpu, u32 data, u32 select_idx); void kvm_pmu_handle_pmcr(struct kvm_vcpu *vcpu, u32 val); #else +void kvm_pmu_vcpu_reset(struct kvm_vcpu *vcpu) {} void kvm_pmu_flush_hwstate(struct kvm_vcpu *vcpu) {} u64 kvm_pmu_get_counter_value(struct kvm_vcpu *vcpu, u32 select_idx) { diff --git a/virt/kvm/arm/pmu.c b/virt/kvm/arm/pmu.c index ff182d6..01e8eb2 100644 --- a/virt/kvm/arm/pmu.c +++ b/virt/kvm/arm/pmu.c @@ -91,6 +91,23 @@ static void kvm_pmu_stop_counter(struct kvm_pmc *pmc) } /** + * kvm_pmu_vcpu_reset - reset pmu state for cpu + * @vcpu: The vcpu pointer + * + */ +void kvm_pmu_vcpu_reset(struct kvm_vcpu *vcpu) +{ + int i; + struct kvm_pmu *pmu = &vcpu->arch.pmu; + + for (i = 0; i < ARMV8_MAX_COUNTERS; i++) { + kvm_pmu_stop_counter(&pmu->pmc[i]); + pmu->pmc[i].idx = i; + pmu->pmc[i].bitmask = 0xffffffffUL; + } +} + +/** * kvm_pmu_flush_hwstate - flush pmu state to cpu * @vcpu: The vcpu pointer *