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Diffstat (limited to 'sys/dev/vmm/vmm_vm.h')
| -rw-r--r-- | sys/dev/vmm/vmm_vm.h | 233 |
1 files changed, 233 insertions, 0 deletions
diff --git a/sys/dev/vmm/vmm_vm.h b/sys/dev/vmm/vmm_vm.h new file mode 100644 index 000000000000..66d3545d1dd5 --- /dev/null +++ b/sys/dev/vmm/vmm_vm.h @@ -0,0 +1,233 @@ +/*- + * SPDX-License-Identifier: BSD-2-Clause + * + * Copyright (c) 2011 NetApp, Inc. + * All rights reserved. + */ + +#ifndef _DEV_VMM_VM_H_ +#define _DEV_VMM_VM_H_ + +#ifdef _KERNEL +#include <sys/_cpuset.h> + +#include <machine/vmm.h> + +#include <dev/vmm/vmm_param.h> +#include <dev/vmm/vmm_mem.h> + +struct vcpu; + +enum vcpu_state { + VCPU_IDLE, + VCPU_FROZEN, + VCPU_RUNNING, + VCPU_SLEEPING, +}; + +/* + * Initialization: + * (a) allocated when vcpu is created + * (i) initialized when vcpu is created and when it is reinitialized + * (o) initialized the first time the vcpu is created + * (x) initialized before use + */ +struct vcpu { + struct mtx mtx; /* (o) protects 'state' and 'hostcpu' */ + enum vcpu_state state; /* (o) vcpu state */ + int vcpuid; /* (o) */ + int hostcpu; /* (o) vcpu's host cpu */ + int reqidle; /* (i) request vcpu to idle */ + struct vm *vm; /* (o) */ + void *cookie; /* (i) cpu-specific data */ + void *stats; /* (a,i) statistics */ + + VMM_VCPU_MD_FIELDS; +}; + +#define vcpu_lock_init(v) mtx_init(&((v)->mtx), "vcpu lock", 0, MTX_SPIN) +#define vcpu_lock_destroy(v) mtx_destroy(&((v)->mtx)) +#define vcpu_lock(v) mtx_lock_spin(&((v)->mtx)) +#define vcpu_unlock(v) mtx_unlock_spin(&((v)->mtx)) +#define vcpu_assert_locked(v) mtx_assert(&((v)->mtx), MA_OWNED) + +extern int vmm_ipinum; + +int vcpu_set_state(struct vcpu *vcpu, enum vcpu_state state, bool from_idle); +int vcpu_set_state_locked(struct vcpu *vcpu, enum vcpu_state newstate, + bool from_idle); +int vcpu_set_state_all(struct vm *vm, enum vcpu_state state); +enum vcpu_state vcpu_get_state(struct vcpu *vcpu, int *hostcpu); +void vcpu_notify_event(struct vcpu *vcpu); +void vcpu_notify_event_locked(struct vcpu *vcpu); +int vcpu_debugged(struct vcpu *vcpu); + +static inline void * +vcpu_stats(struct vcpu *vcpu) +{ + return (vcpu->stats); +} + +static inline struct vm * +vcpu_vm(struct vcpu *vcpu) +{ + return (vcpu->vm); +} + +static inline int +vcpu_vcpuid(struct vcpu *vcpu) +{ + return (vcpu->vcpuid); +} + +static int __inline +vcpu_is_running(struct vcpu *vcpu, int *hostcpu) +{ + return (vcpu_get_state(vcpu, hostcpu) == VCPU_RUNNING); +} + +#ifdef _SYS_PROC_H_ +static int __inline +vcpu_should_yield(struct vcpu *vcpu) +{ + struct thread *td; + + td = curthread; + return (td->td_ast != 0 || td->td_owepreempt != 0); +} +#endif + +typedef void (*vm_rendezvous_func_t)(struct vcpu *vcpu, void *arg); +int vm_handle_rendezvous(struct vcpu *vcpu); + +/* + * Rendezvous all vcpus specified in 'dest' and execute 'func(arg)'. + * The rendezvous 'func(arg)' is not allowed to do anything that will + * cause the thread to be put to sleep. + * + * The caller cannot hold any locks when initiating the rendezvous. + * + * The implementation of this API may cause vcpus other than those specified + * by 'dest' to be stalled. The caller should not rely on any vcpus making + * forward progress when the rendezvous is in progress. + */ +int vm_smp_rendezvous(struct vcpu *vcpu, cpuset_t dest, + vm_rendezvous_func_t func, void *arg); + +/* + * Initialization: + * (o) initialized the first time the VM is created + * (i) initialized when VM is created and when it is reinitialized + * (x) initialized before use + * + * Locking: + * [m] mem_segs_lock + * [r] rendezvous_mtx + * [v] reads require one frozen vcpu, writes require freezing all vcpus + */ +struct vm { + void *cookie; /* (i) cpu-specific data */ + struct vcpu **vcpu; /* (o) guest vcpus */ + struct vm_mem mem; /* (i) [m+v] guest memory */ + + char name[VM_MAX_NAMELEN + 1]; /* (o) virtual machine name */ + struct sx vcpus_init_lock; /* (o) */ + + bool dying; /* (o) is dying */ + int suspend; /* (i) stop VM execution */ + + volatile cpuset_t active_cpus; /* (i) active vcpus */ + volatile cpuset_t debug_cpus; /* (i) vcpus stopped for debug */ + volatile cpuset_t suspended_cpus; /* (i) suspended vcpus */ + volatile cpuset_t halted_cpus; /* (x) cpus in a hard halt */ + + cpuset_t rendezvous_req_cpus; /* (x) [r] rendezvous requested */ + cpuset_t rendezvous_done_cpus; /* (x) [r] rendezvous finished */ + void *rendezvous_arg; /* (x) [r] rendezvous func/arg */ + vm_rendezvous_func_t rendezvous_func; + struct mtx rendezvous_mtx; /* (o) rendezvous lock */ + + uint16_t sockets; /* (o) num of sockets */ + uint16_t cores; /* (o) num of cores/socket */ + uint16_t threads; /* (o) num of threads/core */ + uint16_t maxcpus; /* (o) max pluggable cpus */ + + VMM_VM_MD_FIELDS; +}; + +int vm_create(const char *name, struct vm **retvm); +struct vcpu *vm_alloc_vcpu(struct vm *vm, int vcpuid); +void vm_destroy(struct vm *vm); +int vm_reinit(struct vm *vm); +void vm_reset(struct vm *vm); + +void vm_lock_vcpus(struct vm *vm); +void vm_unlock_vcpus(struct vm *vm); +void vm_disable_vcpu_creation(struct vm *vm); + +int vm_suspend(struct vm *vm, enum vm_suspend_how how); +int vm_activate_cpu(struct vcpu *vcpu); +int vm_suspend_cpu(struct vm *vm, struct vcpu *vcpu); +int vm_resume_cpu(struct vm *vm, struct vcpu *vcpu); + +cpuset_t vm_active_cpus(struct vm *vm); +cpuset_t vm_debug_cpus(struct vm *vm); +cpuset_t vm_suspended_cpus(struct vm *vm); + +uint16_t vm_get_maxcpus(struct vm *vm); +void vm_get_topology(struct vm *vm, uint16_t *sockets, uint16_t *cores, + uint16_t *threads, uint16_t *maxcpus); +int vm_set_topology(struct vm *vm, uint16_t sockets, uint16_t cores, + uint16_t threads, uint16_t maxcpus); + +static inline const char * +vm_name(struct vm *vm) +{ + return (vm->name); +} + +static inline struct vm_mem * +vm_mem(struct vm *vm) +{ + return (&vm->mem); +} + +static inline struct vcpu * +vm_vcpu(struct vm *vm, int vcpuid) +{ + return (vm->vcpu[vcpuid]); +} + +struct vm_eventinfo { + cpuset_t *rptr; /* rendezvous cookie */ + int *sptr; /* suspend cookie */ + int *iptr; /* reqidle cookie */ +}; + +static inline int +vcpu_rendezvous_pending(struct vcpu *vcpu, struct vm_eventinfo *info) +{ + /* + * This check isn't done with atomic operations or under a lock because + * there's no need to. If the vcpuid bit is set, the vcpu is part of a + * rendezvous and the bit won't be cleared until the vcpu enters the + * rendezvous. On rendezvous exit, the cpuset is cleared and the vcpu + * will see an empty cpuset. So, the races are harmless. + */ + return (CPU_ISSET(vcpu_vcpuid(vcpu), info->rptr)); +} + +static inline int +vcpu_suspended(struct vm_eventinfo *info) +{ + return (*info->sptr); +} + +static inline int +vcpu_reqidle(struct vm_eventinfo *info) +{ + return (*info->iptr); +} +#endif /* _KERNEL */ + +#endif /* !_DEV_VMM_VM_H_ */ |