From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, UNWANTED_LANGUAGE_BODY,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id CF8D3C2D0DB for ; Thu, 26 Dec 2019 13:59:11 +0000 (UTC) Received: from mm01.cs.columbia.edu (mm01.cs.columbia.edu [128.59.11.253]) by mail.kernel.org (Postfix) with ESMTP id 8193224656 for ; Thu, 26 Dec 2019 13:59:11 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 8193224656 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=huawei.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kvmarm-bounces@lists.cs.columbia.edu Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 290234AC80; Thu, 26 Dec 2019 08:59:11 -0500 (EST) X-Virus-Scanned: at lists.cs.columbia.edu Received: from mm01.cs.columbia.edu ([127.0.0.1]) by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id KCyAMvJQ8MeT; Thu, 26 Dec 2019 08:59:09 -0500 (EST) Received: from mm01.cs.columbia.edu (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 866FF4ACD6; Thu, 26 Dec 2019 08:59:08 -0500 (EST) Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 95BEA4A95D for ; Thu, 26 Dec 2019 08:59:07 -0500 (EST) X-Virus-Scanned: at lists.cs.columbia.edu Received: from mm01.cs.columbia.edu ([127.0.0.1]) by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id DInUagqxC1+4 for ; Thu, 26 Dec 2019 08:59:06 -0500 (EST) Received: from huawei.com (szxga04-in.huawei.com [45.249.212.190]) by mm01.cs.columbia.edu (Postfix) with ESMTPS id 751E04A95B for ; Thu, 26 Dec 2019 08:59:05 -0500 (EST) Received: from DGGEMS413-HUB.china.huawei.com (unknown [172.30.72.60]) by Forcepoint Email with ESMTP id 820D45B717FF69210710; Thu, 26 Dec 2019 21:59:02 +0800 (CST) Received: from DESKTOP-1NISPDV.china.huawei.com (10.173.221.248) by DGGEMS413-HUB.china.huawei.com (10.3.19.213) with Microsoft SMTP Server id 14.3.439.0; Thu, 26 Dec 2019 21:58:54 +0800 From: Zengruan Ye To: , , , , , Subject: [PATCH v2 3/6] KVM: arm64: Support pvlock preempted via shared structure Date: Thu, 26 Dec 2019 21:58:30 +0800 Message-ID: <20191226135833.1052-4-yezengruan@huawei.com> X-Mailer: git-send-email 2.23.0.windows.1 In-Reply-To: <20191226135833.1052-1-yezengruan@huawei.com> References: <20191226135833.1052-1-yezengruan@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.173.221.248] X-CFilter-Loop: Reflected Cc: maz@kernel.org, daniel.lezcano@linaro.org, linux@armlinux.org.uk, steven.price@arm.com, yezengruan@huawei.com, catalin.marinas@arm.com, will@kernel.org X-BeenThere: kvmarm@lists.cs.columbia.edu X-Mailman-Version: 2.1.14 Precedence: list List-Id: Where KVM/ARM decisions are made List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: kvmarm-bounces@lists.cs.columbia.edu Sender: kvmarm-bounces@lists.cs.columbia.edu Implement the service call for configuring a shared structure between a VCPU and the hypervisor in which the hypervisor can tell the VCPU is running or not. The preempted field is zero if 1) some old KVM deos not support this filed. 2) the VCPU is not preempted. Other values means the VCPU has been preempted. Signed-off-by: Zengruan Ye --- arch/arm/include/asm/kvm_host.h | 18 ++++++++++++ arch/arm64/include/asm/kvm_host.h | 19 +++++++++++++ arch/arm64/kvm/Makefile | 1 + virt/kvm/arm/arm.c | 8 ++++++ virt/kvm/arm/hypercalls.c | 8 ++++++ virt/kvm/arm/pvlock.c | 46 +++++++++++++++++++++++++++++++ 6 files changed, 100 insertions(+) create mode 100644 virt/kvm/arm/pvlock.c diff --git a/arch/arm/include/asm/kvm_host.h b/arch/arm/include/asm/kvm_host.h index 556cd818eccf..dfeaf9204875 100644 --- a/arch/arm/include/asm/kvm_host.h +++ b/arch/arm/include/asm/kvm_host.h @@ -356,6 +356,24 @@ static inline bool kvm_arm_is_pvtime_enabled(struct kvm_vcpu_arch *vcpu_arch) return false; } +static inline void kvm_arm_pvlock_preempted_init(struct kvm_vcpu_arch *vcpu_arch) +{ +} + +static inline bool kvm_arm_is_pvlock_preempted_ready(struct kvm_vcpu_arch *vcpu_arch) +{ + return false; +} + +static inline gpa_t kvm_init_pvlock(struct kvm_vcpu *vcpu) +{ + return GPA_INVALID; +} + +static inline void kvm_update_pvlock_preempted(struct kvm_vcpu *vcpu, u64 preempted) +{ +} + void kvm_mmu_wp_memory_region(struct kvm *kvm, int slot); struct kvm_vcpu *kvm_mpidr_to_vcpu(struct kvm *kvm, unsigned long mpidr); diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h index c61260cf63c5..2818a2330f92 100644 --- a/arch/arm64/include/asm/kvm_host.h +++ b/arch/arm64/include/asm/kvm_host.h @@ -354,6 +354,12 @@ struct kvm_vcpu_arch { u64 last_steal; gpa_t base; } steal; + + /* Guest PV lock state */ + struct { + u64 preempted; + gpa_t base; + } pv; }; /* Pointer to the vcpu's SVE FFR for sve_{save,load}_state() */ @@ -515,6 +521,19 @@ static inline bool kvm_arm_is_pvtime_enabled(struct kvm_vcpu_arch *vcpu_arch) return (vcpu_arch->steal.base != GPA_INVALID); } +static inline void kvm_arm_pvlock_preempted_init(struct kvm_vcpu_arch *vcpu_arch) +{ + vcpu_arch->pv.base = GPA_INVALID; +} + +static inline bool kvm_arm_is_pvlock_preempted_ready(struct kvm_vcpu_arch *vcpu_arch) +{ + return (vcpu_arch->pv.base != GPA_INVALID); +} + +gpa_t kvm_init_pvlock(struct kvm_vcpu *vcpu); +void kvm_update_pvlock_preempted(struct kvm_vcpu *vcpu, u64 preempted); + void kvm_set_sei_esr(struct kvm_vcpu *vcpu, u64 syndrome); struct kvm_vcpu *kvm_mpidr_to_vcpu(struct kvm *kvm, unsigned long mpidr); diff --git a/arch/arm64/kvm/Makefile b/arch/arm64/kvm/Makefile index 5ffbdc39e780..e4591f56d5f1 100644 --- a/arch/arm64/kvm/Makefile +++ b/arch/arm64/kvm/Makefile @@ -15,6 +15,7 @@ kvm-$(CONFIG_KVM_ARM_HOST) += $(KVM)/arm/arm.o $(KVM)/arm/mmu.o $(KVM)/arm/mmio. kvm-$(CONFIG_KVM_ARM_HOST) += $(KVM)/arm/psci.o $(KVM)/arm/perf.o kvm-$(CONFIG_KVM_ARM_HOST) += $(KVM)/arm/hypercalls.o kvm-$(CONFIG_KVM_ARM_HOST) += $(KVM)/arm/pvtime.o +kvm-$(CONFIG_KVM_ARM_HOST) += $(KVM)/arm/pvlock.o kvm-$(CONFIG_KVM_ARM_HOST) += inject_fault.o regmap.o va_layout.o kvm-$(CONFIG_KVM_ARM_HOST) += hyp.o hyp-init.o handle_exit.o diff --git a/virt/kvm/arm/arm.c b/virt/kvm/arm/arm.c index 8de4daf25097..36d57e77d3c4 100644 --- a/virt/kvm/arm/arm.c +++ b/virt/kvm/arm/arm.c @@ -383,6 +383,8 @@ int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) kvm_arm_pvtime_vcpu_init(&vcpu->arch); + kvm_arm_pvlock_preempted_init(&vcpu->arch); + return kvm_vgic_vcpu_init(vcpu); } @@ -421,6 +423,9 @@ void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) vcpu_set_wfx_traps(vcpu); vcpu_ptrauth_setup_lazy(vcpu); + + if (kvm_arm_is_pvlock_preempted_ready(&vcpu->arch)) + kvm_update_pvlock_preempted(vcpu, 0); } void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) @@ -434,6 +439,9 @@ void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) vcpu->cpu = -1; kvm_arm_set_running_vcpu(NULL); + + if (kvm_arm_is_pvlock_preempted_ready(&vcpu->arch)) + kvm_update_pvlock_preempted(vcpu, 1); } static void vcpu_power_off(struct kvm_vcpu *vcpu) diff --git a/virt/kvm/arm/hypercalls.c b/virt/kvm/arm/hypercalls.c index 550dfa3e53cd..1c6a11f21bb4 100644 --- a/virt/kvm/arm/hypercalls.c +++ b/virt/kvm/arm/hypercalls.c @@ -52,6 +52,9 @@ int kvm_hvc_call_handler(struct kvm_vcpu *vcpu) case ARM_SMCCC_HV_PV_TIME_FEATURES: val = SMCCC_RET_SUCCESS; break; + case ARM_SMCCC_HV_PV_LOCK_FEATURES: + val = SMCCC_RET_SUCCESS; + break; } break; case ARM_SMCCC_HV_PV_TIME_FEATURES: @@ -62,6 +65,11 @@ int kvm_hvc_call_handler(struct kvm_vcpu *vcpu) if (gpa != GPA_INVALID) val = gpa; break; + case ARM_SMCCC_HV_PV_LOCK_PREEMPTED: + gpa = kvm_init_pvlock(vcpu); + if (gpa != GPA_INVALID) + val = gpa; + break; default: return kvm_psci_call(vcpu); } diff --git a/virt/kvm/arm/pvlock.c b/virt/kvm/arm/pvlock.c new file mode 100644 index 000000000000..cdfd30a903b9 --- /dev/null +++ b/virt/kvm/arm/pvlock.c @@ -0,0 +1,46 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright(c) 2019 Huawei Technologies Co., Ltd + * Author: Zengruan Ye + */ + +#include +#include + +#include + +#include + +gpa_t kvm_init_pvlock(struct kvm_vcpu *vcpu) +{ + struct pvlock_vcpu_state init_values = {}; + struct kvm *kvm = vcpu->kvm; + u64 base = vcpu->arch.pv.base; + int idx; + + if (base == GPA_INVALID) + return base; + + idx = srcu_read_lock(&kvm->srcu); + kvm_write_guest(kvm, base, &init_values, sizeof(init_values)); + srcu_read_unlock(&kvm->srcu, idx); + + return base; +} + +void kvm_update_pvlock_preempted(struct kvm_vcpu *vcpu, u64 preempted) +{ + int idx; + u64 offset; + __le64 preempted_le; + struct kvm *kvm = vcpu->kvm; + u64 base = vcpu->arch.pv.base; + + vcpu->arch.pv.preempted = preempted; + preempted_le = cpu_to_le64(preempted); + + idx = srcu_read_lock(&kvm->srcu); + offset = offsetof(struct pvlock_vcpu_state, preempted); + kvm_put_guest(kvm, base + offset, preempted_le, u64); + srcu_read_unlock(&kvm->srcu, idx); +} -- 2.19.1 _______________________________________________ kvmarm mailing list kvmarm@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/kvmarm