43 lines
1.2 KiB
C
43 lines
1.2 KiB
C
#ifndef _ASM_E2K_KVM_CSD_LOCK_H
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#define _ASM_E2K_KVM_CSD_LOCK_H
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/*
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* This file implements on host the arch-dependent parts of kvm guest
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* csd_lock/csd_unlock functions to serialize access to per-cpu csd resources
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*
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* Copyright 2016 Salavat S. Guiliazov (atic@mcst.ru)
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*/
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#include <linux/types.h>
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#include <linux/list.h>
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#include <linux/sched.h>
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#include <linux/kvm.h>
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#include <linux/kvm_host.h>
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#ifdef CONFIG_SMP
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#include <asm/kvm/threads.h>
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#include <asm/kvm/hypercall.h>
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typedef struct csd_lock_waiter {
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struct list_head wait_list;
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struct kvm_vcpu *vcpu;
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struct task_struct *task;
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void *lock;
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} csd_lock_waiter_t;
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/* max number of csd lock waiters structures: */
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/* on each VCPU 2 structures - current and next */
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#define KVM_MAX_CSD_LOCK_FREE_NUM (KVM_MAX_VCPUS * 2)
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extern int kvm_guest_csd_lock_ctl(struct kvm_vcpu *vcpu,
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csd_ctl_t csd_ctl_no, void *lock);
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extern int kvm_guest_csd_lock_init(struct kvm *kvm);
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extern void kvm_guest_csd_lock_destroy(struct kvm *kvm);
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#else /* ! CONFIG_SMP */
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#define kvm_guest_csd_lock_ctl(vcpu, csd_ctl_no, lock) (-ENOSYS)
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#define kvm_guest_csd_lock_init(kvm) (0)
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#define kvm_guest_csd_lock_destroy(kvm)
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#endif /* CONFIG_SMP */
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#endif /* _ASM_E2K_KVM_CSD_LOCK_H */ |