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00ad3863a1
Maintain a per-pCPU array of vCPUs (struct acrn_vcpu *vcpu_array[CONFIG_MAX_VM_NUM]), one VM cannot have multiple vCPUs share one pcpu, so we can utilize this property and use the containing VM's vm_id as the index to the vCPU array: In create_vcpu(), we simply do: per_cpu(vcpu_array, pcpu_id)[vm->vm_id] = vcpu; In offline_vcpu(): per_cpu(vcpu_array, pcpuid_from_vcpu(vcpu))[vcpu->vm->vm_id] = NULL; so basically we use the containing VM's vm_id as the index to the vCPU array, as well as the index of posted interrupt IRQ/vector pair that are assigned to this vCPU: 0: first vCPU and first posted interrupt IRQs/vector pair (POSTED_INTR_IRQ/POSTED_INTR_VECTOR) ... CONFIG_MAX_VM_NUM-1: last vCPU and last posted interrupt IRQs/vector pair ((POSTED_INTR_IRQ + CONFIG_MAX_VM_NUM - 1U)/(POSTED_INTR_VECTOR + CONFIG_MAX_VM_NUM - 1U) In the posted interrupt handler, it will do the following: Translate the IRQ into a zero based index of where the vCPU is located in the vCPU list for current pCPU. Once the vCPU is found, we wake up the waiting thread and record this request as ACRN_REQUEST_EVENT Tracked-On: #4506 Signed-off-by: dongshen <dongsheng.x.zhang@intel.com> Reviewed-by: Eddie Dong <eddie.dong@Intel.com> Signed-off-by: dongshen <dongsheng.x.zhang@intel.com> |
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