From patchwork Fri Sep 11 08:55:15 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shannon Zhao X-Patchwork-Id: 7158821 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 6FC1ABF036 for ; Fri, 11 Sep 2015 09:07:56 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 7AFB92085A for ; Fri, 11 Sep 2015 09:07:55 +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 827652085E for ; Fri, 11 Sep 2015 09:07:54 +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 1ZaKIM-0004Av-83; Fri, 11 Sep 2015 09:06:58 +0000 Received: from casper.infradead.org ([2001:770:15f::2]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1ZaK9A-0001Da-W7 for linux-arm-kernel@bombadil.infradead.org; Fri, 11 Sep 2015 08:57:29 +0000 Received: from szxga01-in.huawei.com ([58.251.152.64]) by casper.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1ZaK96-0005a1-Ti for linux-arm-kernel@lists.infradead.org; Fri, 11 Sep 2015 08:57:27 +0000 Received: from 172.24.1.48 (EHLO SZXEML423-HUB.china.huawei.com) ([172.24.1.48]) by szxrg01-dlp.huawei.com (MOS 4.3.7-GA FastPath queued) with ESMTP id CUU27198; Fri, 11 Sep 2015 16:56:05 +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 16:55:56 +0800 From: Shannon Zhao To: Subject: [PATCH v2 22/22] KVM: ARM64: Add a new kvm ARM PMU device Date: Fri, 11 Sep 2015 16:55:15 +0800 Message-ID: <1441961715-11688-23-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 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20150911_095726_146657_455A6B6D X-CRM114-Status: GOOD ( 25.04 ) 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, kvm@vger.kernel.org, marc.zyngier@arm.com, will.deacon@arm.com, peter.huangpeng@huawei.com, linux-arm-kernel@lists.infradead.org, zhaoshenglong@huawei.com, alex.bennee@linaro.org, christoffer.dall@linaro.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 Add a new kvm device type KVM_DEV_TYPE_ARM_PMU_V3 for ARM PMU. Implement the kvm_device_ops for it. Signed-off-by: Shannon Zhao --- Documentation/virtual/kvm/devices/arm-pmu.txt | 15 +++++ arch/arm64/include/uapi/asm/kvm.h | 3 + include/linux/kvm_host.h | 1 + include/uapi/linux/kvm.h | 2 + virt/kvm/arm/pmu.c | 88 +++++++++++++++++++++++++++ virt/kvm/kvm_main.c | 4 ++ 6 files changed, 113 insertions(+) create mode 100644 Documentation/virtual/kvm/devices/arm-pmu.txt diff --git a/Documentation/virtual/kvm/devices/arm-pmu.txt b/Documentation/virtual/kvm/devices/arm-pmu.txt new file mode 100644 index 0000000..49481c4 --- /dev/null +++ b/Documentation/virtual/kvm/devices/arm-pmu.txt @@ -0,0 +1,15 @@ +ARM Virtual Performance Monitor Unit (vPMU) +=========================================== + +Device types supported: + KVM_DEV_TYPE_ARM_PMU_V3 ARM Performance Monitor Unit v3 + +Instantiate one PMU instance for per VCPU through this API. + +Groups: + KVM_DEV_ARM_PMU_GRP_IRQ + Attributes: + A value describing the interrupt number of PMU overflow interrupt. + + Errors: + -EINVAL: Value set is out of the expected range diff --git a/arch/arm64/include/uapi/asm/kvm.h b/arch/arm64/include/uapi/asm/kvm.h index d268320..9960889 100644 --- a/arch/arm64/include/uapi/asm/kvm.h +++ b/arch/arm64/include/uapi/asm/kvm.h @@ -171,6 +171,9 @@ struct kvm_arch_memory_slot { #define KVM_DEV_ARM_VGIC_GRP_CTRL 4 #define KVM_DEV_ARM_VGIC_CTRL_INIT 0 +/* Device Control API: ARM PMU */ +#define KVM_DEV_ARM_PMU_GRP_IRQ 0 + /* KVM_IRQ_LINE irq field index values */ #define KVM_ARM_IRQ_TYPE_SHIFT 24 #define KVM_ARM_IRQ_TYPE_MASK 0xff diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index 05e99b8..9136dec 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -1129,6 +1129,7 @@ extern struct kvm_device_ops kvm_mpic_ops; extern struct kvm_device_ops kvm_xics_ops; extern struct kvm_device_ops kvm_arm_vgic_v2_ops; extern struct kvm_device_ops kvm_arm_vgic_v3_ops; +extern struct kvm_device_ops kvm_arm_pmu_ops; #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h index 716ad4a..591d185 100644 --- a/include/uapi/linux/kvm.h +++ b/include/uapi/linux/kvm.h @@ -1018,6 +1018,8 @@ enum kvm_device_type { #define KVM_DEV_TYPE_FLIC KVM_DEV_TYPE_FLIC KVM_DEV_TYPE_ARM_VGIC_V3, #define KVM_DEV_TYPE_ARM_VGIC_V3 KVM_DEV_TYPE_ARM_VGIC_V3 + KVM_DEV_TYPE_ARM_PMU_V3, +#define KVM_DEV_TYPE_ARM_PMU_V3 KVM_DEV_TYPE_ARM_PMU_V3 KVM_DEV_TYPE_MAX, }; diff --git a/virt/kvm/arm/pmu.c b/virt/kvm/arm/pmu.c index 8eccac9..d9f2e5b 100644 --- a/virt/kvm/arm/pmu.c +++ b/virt/kvm/arm/pmu.c @@ -19,6 +19,7 @@ #include #include #include +#include #include #include #include @@ -410,3 +411,90 @@ void kvm_pmu_set_counter_event_type(struct kvm_vcpu *vcpu, unsigned long data, } pmc->perf_event = event; } + +static int kvm_arm_pmu_set_irq(struct kvm *kvm, int irq) +{ + int j; + struct kvm_vcpu *vcpu; + + kvm_for_each_vcpu(j, vcpu, kvm) { + struct kvm_pmu *pmu = &vcpu->arch.pmu; + + kvm_debug("Set kvm ARM PMU irq: %d\n", irq); + pmu->irq_num = irq; + } + + return 0; +} + +static int kvm_arm_pmu_create(struct kvm_device *dev, u32 type) +{ + int i, j; + struct kvm_vcpu *vcpu; + struct kvm *kvm = dev->kvm; + + kvm_for_each_vcpu(j, vcpu, kvm) { + struct kvm_pmu *pmu = &vcpu->arch.pmu; + + memset(pmu, 0, sizeof(*pmu)); + for (i = 0; i < ARMV8_MAX_COUNTERS; i++) { + pmu->pmc[i].idx = i; + pmu->pmc[i].vcpu = vcpu; + } + pmu->irq_num = -1; + } + + return 0; +} + +static void kvm_arm_pmu_destroy(struct kvm_device *dev) +{ + kfree(dev); +} + +static int kvm_arm_pmu_set_attr(struct kvm_device *dev, + struct kvm_device_attr *attr) +{ + switch (attr->group) { + case KVM_DEV_ARM_PMU_GRP_IRQ: { + int __user *uaddr = (int __user *)(long)attr->addr; + int reg; + + if (get_user(reg, uaddr)) + return -EFAULT; + + if (reg < VGIC_NR_SGIS || reg > dev->kvm->arch.vgic.nr_irqs) + return -EINVAL; + + return kvm_arm_pmu_set_irq(dev->kvm, reg); + } + } + + return -ENXIO; +} + +static int kvm_arm_pmu_get_attr(struct kvm_device *dev, + struct kvm_device_attr *attr) +{ + return 0; +} + +static int kvm_arm_pmu_has_attr(struct kvm_device *dev, + struct kvm_device_attr *attr) +{ + switch (attr->group) { + case KVM_DEV_ARM_PMU_GRP_IRQ: + return 0; + } + + return -ENXIO; +} + +struct kvm_device_ops kvm_arm_pmu_ops = { + .name = "kvm-arm-pmu", + .create = kvm_arm_pmu_create, + .destroy = kvm_arm_pmu_destroy, + .set_attr = kvm_arm_pmu_set_attr, + .get_attr = kvm_arm_pmu_get_attr, + .has_attr = kvm_arm_pmu_has_attr, +}; diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index 8b8a444..31aa245 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -2549,6 +2549,10 @@ static struct kvm_device_ops *kvm_device_ops_table[KVM_DEV_TYPE_MAX] = { #ifdef CONFIG_KVM_XICS [KVM_DEV_TYPE_XICS] = &kvm_xics_ops, #endif + +#ifdef CONFIG_KVM_ARM_PMU + [KVM_DEV_TYPE_ARM_PMU_V3] = &kvm_arm_pmu_ops, +#endif }; int kvm_register_device_ops(struct kvm_device_ops *ops, u32 type)