search for: kvm_vcpu_introspection

...--- a/include/linux/kvmi_host.h +++ b/include/linux/kvmi_host.h @@ -11,8 +11,18 @@ struct kvm_vcpu; #define KVMI_NUM_COMMANDS KVMI_NUM_MESSAGES +struct kvmi_job { + struct list_head link; + void *ctx; + void (*fct)(struct kvm_vcpu *vcpu, void *ctx); + void (*free_fct)(void *ctx); +}; + struct kvm_vcpu_introspection { struct kvm_vcpu_arch_introspection arch; + + struct list_head job_list; + spinlock_t job_lock; }; struct kvm_introspection { diff --git a/virt/kvm/introspection/kvmi.c b/virt/kvm/introspection/kvmi.c index 655170ffb574..5149f8e06131 100644 --- a/virt/kvm/introspection/kvmi.c +++ b/virt/kvm/...

...h +++ b/include/linux/kvmi_host.h @@ -11,6 +11,14 @@ struct kvm_vcpu; #define KVMI_NUM_COMMANDS KVMI_NUM_MESSAGES +struct kvmi_vcpu_reply { + int error; + int action; + u32 seq; + void *data; + size_t size; +}; + struct kvmi_job { struct list_head link; void *ctx; @@ -25,6 +33,9 @@ struct kvm_vcpu_introspection { spinlock_t job_lock; atomic_t pause_requests; + + struct kvmi_vcpu_reply reply; + bool waiting_for_reply; }; struct kvm_introspection { diff --git a/include/uapi/linux/kvmi.h b/include/uapi/linux/kvmi.h index 54a788c1c204..2eb1e5b20d53 100644 --- a/include/uapi/linux/kvmi.h +++ b/includ...

..._recv_thread, kvmi, "kvmi-recv"); if (IS_ERR(kvmi->recv)) { err = -ENOMEM; + kvmi_put(kvm); goto unhook; } @@ -616,3 +651,40 @@ int kvmi_cmd_write_physical(struct kvm *kvm, u64 gpa, u64 size, const void *buf) return 0; } + +static struct kvmi_job *kvmi_pull_job(struct kvm_vcpu_introspection *vcpui) +{ + struct kvmi_job *job = NULL; + + spin_lock(&vcpui->job_lock); + job = list_first_entry_or_null(&vcpui->job_list, typeof(*job), link); + if (job) + list_del(&job->link); + spin_unlock(&vcpui->job_lock); + + return job; +} + +void kvmi_run_jobs(struct kvm_vcp...

...ent doesn't have a reply and share the kvmi_event structure, for consistency with the vCPU events. diff --git a/include/linux/kvmi_host.h b/include/linux/kvmi_host.h index 49e68777a390..da621d83cd94 100644 --- a/include/linux/kvmi_host.h +++ b/include/linux/kvmi_host.h @@ -36,6 +36,8 @@ struct kvm_vcpu_introspection { struct kvmi_vcpu_reply reply; bool waiting_for_reply; + + DECLARE_BITMAP(ev_mask, KVMI_NUM_EVENTS); }; struct kvm_introspection { diff --git a/include/uapi/linux/kvmi.h b/include/uapi/linux/kvmi.h index 2eb1e5b20d53..745503fb7378 100644 --- a/include/uapi/linux/kvmi.h +++ b/include/uapi...

The KVM introspection subsystem provides a facility for applications running on the host or in a separate VM, to control the execution of other VMs (pause, resume, shutdown), query the state of the vCPUs (GPRs, MSRs etc.), alter the page access bits in the shadow page tables (only for the hardware backed ones, eg. Intel's EPT) and receive notifications when events of interest have taken place

The KVM introspection subsystem provides a facility for applications running on the host or in a separate VM, to control the execution of other VMs (pause, resume, shutdown), query the state of the vCPUs (GPRs, MSRs etc.), alter the page access bits in the shadow page tables (only for the hardware backed ones, eg. Intel's EPT) and receive notifications when events of interest have taken place

...)); + e.failed = success ? 0 : 1; + + err = kvmi_send_event(vcpu, KVMI_EVENT_SINGLESTEP, &e, sizeof(e), + NULL, 0, &action); + if (err) + return KVMI_EVENT_ACTION_CONTINUE; + + return action; +} + +static void __kvmi_singlestep_event(struct kvm_vcpu *vcpu, bool success) +{ + struct kvm_vcpu_introspection *vcpui = VCPUI(vcpu); + u32 action; + + if (!vcpui->singlestep.loop) + return; + + action = kvmi_send_singlestep(vcpu, success); + switch (action) { + case KVMI_EVENT_ACTION_CONTINUE: + break; + default: + kvmi_handle_common_event_actions(vcpu->kvm, action, + "SINGLESTEP");...

...{ + u32 action; + + action = kvmi_send_singlestep(vcpu, success); + switch (action) { + case KVMI_EVENT_ACTION_CONTINUE: + break; + default: + kvmi_handle_common_event_actions(vcpu->kvm, action); + } +} + +static void kvmi_handle_singlestep_exit(struct kvm_vcpu *vcpu, bool success) +{ + struct kvm_vcpu_introspection *vcpui; + struct kvm_introspection *kvmi; + struct kvm *kvm = vcpu->kvm; + + kvmi = kvmi_get(kvm); + if (!kvmi) + return; + + vcpui = VCPUI(vcpu); + + if (vcpui->singlestep.loop) + kvmi_singlestep_event(vcpu, success); + + kvmi_put(kvm); +} + +void kvmi_singlestep_done(struct kvm_vcpu *vcpu...

...return -1; + /* try to reinject previous events if any */ if (vcpu->arch.exception.injected) diff --git a/include/linux/kvmi_host.h b/include/linux/kvmi_host.h index a9f572df1809..7c84ca681411 100644 --- a/include/linux/kvmi_host.h +++ b/include/linux/kvmi_host.h @@ -50,6 +50,10 @@ struct kvm_vcpu_introspection { bool pending; bool send_event; } exception; + + struct { + bool loop; + } singlestep; }; struct kvm_introspection { @@ -90,6 +94,7 @@ void kvmi_handle_requests(struct kvm_vcpu *vcpu); bool kvmi_hypercall_event(struct kvm_vcpu *vcpu); bool kvmi_breakpoint_event(struct kvm_vcpu *vcpu...