From patchwork Fri Sep 11 08:54:55 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shannon Zhao X-Patchwork-Id: 7158361 Return-Path: X-Original-To: patchwork-kvm@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 63492BEEC1 for ; Fri, 11 Sep 2015 08:57:32 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 6E52D2085B for ; Fri, 11 Sep 2015 08:57:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 61CCD2085F for ; Fri, 11 Sep 2015 08:57:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751841AbbIKI52 (ORCPT ); Fri, 11 Sep 2015 04:57:28 -0400 Received: from szxga01-in.huawei.com ([58.251.152.64]:35995 "EHLO szxga01-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751235AbbIKI5X (ORCPT ); Fri, 11 Sep 2015 04:57:23 -0400 Received: from 172.24.1.47 (EHLO SZXEML423-HUB.china.huawei.com) ([172.24.1.47]) by szxrg01-dlp.huawei.com (MOS 4.3.7-GA FastPath queued) with ESMTP id CUU27142; Fri, 11 Sep 2015 16:55:50 +0800 (CST) Received: from HGHY1Z002260041.china.huawei.com (10.177.16.142) by SZXEML423-HUB.china.huawei.com (10.82.67.154) with Microsoft SMTP Server id 14.3.235.1; Fri, 11 Sep 2015 16:55:40 +0800 From: Shannon Zhao To: CC: , , , , , , , , , Subject: [PATCH v2 02/22] KVM: ARM64: Define PMU data structure for each vcpu Date: Fri, 11 Sep 2015 16:54:55 +0800 Message-ID: <1441961715-11688-3-git-send-email-zhaoshenglong@huawei.com> X-Mailer: git-send-email 1.9.0.msysgit.0 In-Reply-To: <1441961715-11688-1-git-send-email-zhaoshenglong@huawei.com> References: <1441961715-11688-1-git-send-email-zhaoshenglong@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.177.16.142] X-CFilter-Loop: Reflected Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, 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 Here we plan to support virtual PMU for guest by full software emulation, so define some basic structs and functions preparing for futher steps. Define struct kvm_pmc for performance monitor counter and struct kvm_pmu for performance monitor unit for each vcpu. According to ARMv8 spec, the PMU contains at most 32(ARMV8_MAX_COUNTERS) counters. Since this only supports ARM64 (or PMUv3), add a separate config symbol for it. Signed-off-by: Shannon Zhao --- arch/arm64/include/asm/kvm_host.h | 2 ++ arch/arm64/include/asm/pmu.h | 2 ++ arch/arm64/kvm/Kconfig | 8 ++++++++ include/kvm/arm_pmu.h | 39 +++++++++++++++++++++++++++++++++++++++ 4 files changed, 51 insertions(+) create mode 100644 include/kvm/arm_pmu.h diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h index 2709db2..3c88873 100644 --- a/arch/arm64/include/asm/kvm_host.h +++ b/arch/arm64/include/asm/kvm_host.h @@ -42,6 +42,7 @@ #include #include +#include #define KVM_VCPU_MAX_FEATURES 3 @@ -116,6 +117,7 @@ struct kvm_vcpu_arch { /* VGIC state */ struct vgic_cpu vgic_cpu; struct arch_timer_cpu timer_cpu; + struct kvm_pmu pmu; /* * Anything that is not used directly from assembly code goes diff --git a/arch/arm64/include/asm/pmu.h b/arch/arm64/include/asm/pmu.h index b9f394a..95681e6 100644 --- a/arch/arm64/include/asm/pmu.h +++ b/arch/arm64/include/asm/pmu.h @@ -19,6 +19,8 @@ #ifndef __ASM_PMU_H #define __ASM_PMU_H +#include + #define ARMV8_MAX_COUNTERS 32 #define ARMV8_COUNTER_MASK (ARMV8_MAX_COUNTERS - 1) diff --git a/arch/arm64/kvm/Kconfig b/arch/arm64/kvm/Kconfig index bfffe8f..3c7c58d 100644 --- a/arch/arm64/kvm/Kconfig +++ b/arch/arm64/kvm/Kconfig @@ -31,6 +31,7 @@ config KVM select KVM_VFIO select HAVE_KVM_EVENTFD select HAVE_KVM_IRQFD + select KVM_ARM_PMU ---help--- Support hosting virtualized guest machines. @@ -52,4 +53,11 @@ config KVM_ARM_MAX_VCPUS large, so only choose a reasonable number that you expect to actually use. +config KVM_ARM_PMU + bool + depends on KVM_ARM_HOST + ---help--- + Adds support for a virtual Performance Monitoring Unit (PMU) in + virtual machines. + endif # VIRTUALIZATION diff --git a/include/kvm/arm_pmu.h b/include/kvm/arm_pmu.h new file mode 100644 index 0000000..64af88a --- /dev/null +++ b/include/kvm/arm_pmu.h @@ -0,0 +1,39 @@ +/* + * Copyright (C) 2015 Linaro Ltd. + * Author: Shannon Zhao + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + */ + +#ifndef __ASM_ARM_KVM_PMU_H +#define __ASM_ARM_KVM_PMU_H + +#include + +struct kvm_pmc { + u8 idx;/* index into the pmu->pmc array */ + struct perf_event *perf_event; + struct kvm_vcpu *vcpu; +}; + +struct kvm_pmu { +#ifdef CONFIG_KVM_ARM_PMU + /* PMU IRQ Number per VCPU */ + int irq_num; + /* IRQ pending flag */ + bool irq_pending; + struct kvm_pmc pmc[ARMV8_MAX_COUNTERS]; +#endif +}; + +#endif