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1f4b34f825
Per Hyper-V specification (and as required by Hyper-V-aware guests), SynIC provides 4 per-vCPU timers. Each timer is programmed via a pair of MSRs, and signals expiration by delivering a special format message to the configured SynIC message slot and triggering the corresponding synthetic interrupt. Note: as implemented by this patch, all periodic timers are "lazy" (i.e. if the vCPU wasn't scheduled for more than the timer period the timer events are lost), regardless of the corresponding configuration MSR. If deemed necessary, the "catch up" mode (the timer period is shortened until the timer catches up) will be implemented later. Changes v2: * Use remainder to calculate periodic timer expiration time Signed-off-by: Andrey Smetanin <asmetanin@virtuozzo.com> Reviewed-by: Roman Kagan <rkagan@virtuozzo.com> CC: Gleb Natapov <gleb@kernel.org> CC: Paolo Bonzini <pbonzini@redhat.com> CC: "K. Y. Srinivasan" <kys@microsoft.com> CC: Haiyang Zhang <haiyangz@microsoft.com> CC: Vitaly Kuznetsov <vkuznets@redhat.com> CC: Roman Kagan <rkagan@virtuozzo.com> CC: Denis V. Lunev <den@openvz.org> CC: qemu-devel@nongnu.org Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
87 lines
2.5 KiB
C
87 lines
2.5 KiB
C
/*
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* KVM Microsoft Hyper-V emulation
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*
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* derived from arch/x86/kvm/x86.c
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*
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* Copyright (C) 2006 Qumranet, Inc.
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* Copyright (C) 2008 Qumranet, Inc.
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* Copyright IBM Corporation, 2008
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* Copyright 2010 Red Hat, Inc. and/or its affiliates.
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* Copyright (C) 2015 Andrey Smetanin <asmetanin@virtuozzo.com>
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*
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* Authors:
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* Avi Kivity <avi@qumranet.com>
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* Yaniv Kamay <yaniv@qumranet.com>
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* Amit Shah <amit.shah@qumranet.com>
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* Ben-Ami Yassour <benami@il.ibm.com>
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* Andrey Smetanin <asmetanin@virtuozzo.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2. See
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* the COPYING file in the top-level directory.
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*
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*/
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#ifndef __ARCH_X86_KVM_HYPERV_H__
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#define __ARCH_X86_KVM_HYPERV_H__
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static inline struct kvm_vcpu_hv *vcpu_to_hv_vcpu(struct kvm_vcpu *vcpu)
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{
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return &vcpu->arch.hyperv;
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}
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static inline struct kvm_vcpu *hv_vcpu_to_vcpu(struct kvm_vcpu_hv *hv_vcpu)
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{
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struct kvm_vcpu_arch *arch;
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arch = container_of(hv_vcpu, struct kvm_vcpu_arch, hyperv);
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return container_of(arch, struct kvm_vcpu, arch);
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}
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static inline struct kvm_vcpu_hv_synic *vcpu_to_synic(struct kvm_vcpu *vcpu)
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{
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return &vcpu->arch.hyperv.synic;
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}
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static inline struct kvm_vcpu *synic_to_vcpu(struct kvm_vcpu_hv_synic *synic)
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{
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return hv_vcpu_to_vcpu(container_of(synic, struct kvm_vcpu_hv, synic));
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}
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int kvm_hv_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data, bool host);
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int kvm_hv_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata);
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bool kvm_hv_hypercall_enabled(struct kvm *kvm);
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int kvm_hv_hypercall(struct kvm_vcpu *vcpu);
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void kvm_hv_irq_routing_update(struct kvm *kvm);
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int kvm_hv_synic_set_irq(struct kvm *kvm, u32 vcpu_id, u32 sint);
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void kvm_hv_synic_send_eoi(struct kvm_vcpu *vcpu, int vector);
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int kvm_hv_activate_synic(struct kvm_vcpu *vcpu);
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void kvm_hv_vcpu_init(struct kvm_vcpu *vcpu);
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void kvm_hv_vcpu_uninit(struct kvm_vcpu *vcpu);
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static inline struct kvm_vcpu_hv_stimer *vcpu_to_stimer(struct kvm_vcpu *vcpu,
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int timer_index)
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{
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return &vcpu_to_hv_vcpu(vcpu)->stimer[timer_index];
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}
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static inline struct kvm_vcpu *stimer_to_vcpu(struct kvm_vcpu_hv_stimer *stimer)
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{
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struct kvm_vcpu_hv *hv_vcpu;
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hv_vcpu = container_of(stimer - stimer->index, struct kvm_vcpu_hv,
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stimer[0]);
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return hv_vcpu_to_vcpu(hv_vcpu);
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}
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static inline bool kvm_hv_has_stimer_pending(struct kvm_vcpu *vcpu)
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{
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return !bitmap_empty(vcpu->arch.hyperv.stimer_pending_bitmap,
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HV_SYNIC_STIMER_COUNT);
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}
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void kvm_hv_process_stimers(struct kvm_vcpu *vcpu);
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#endif
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