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hv: vPCI: add assign/deassign PCI device HC APIs

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Add assign/deassign PCI device hypercall APIs to assign a PCI device from SOS to
post-launched VM or deassign a PCI device from post-launched VM to SOS. This patch
is prepared for spliting passthrough PCI device from DM to HV.
The old assign/deassign ptdev APIs will be discarded.

Tracked-On: #4371
Signed-off-by: Li Fei1 <fei1.li@intel.com>
This commit is contained in:
Li Fei1
2020-01-16 22:09:33 +08:00
committed by wenlingz
parent 2ca01206f3
commit fe3182ea05
8 changed files with 260 additions and 8 deletions
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60
hypervisor/common/hypercall.c
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@@ -882,6 +882,66 @@ int32_t hcall_deassign_ptdev(struct acrn_vm *vm, uint16_t vmid, uint64_t param)
return ret;
}
/**
* @brief Assign one PCI dev to a VM.
*
* @param vm Pointer to VM data structure
* @param vmid ID of the VM
* @param param guest physical address. This gpa points to data structure of
* acrn_assign_pcidev including assign PCI device info
*
* @pre Pointer vm shall point to SOS_VM
* @return 0 on success, non-zero on error.
*/
int32_t hcall_assign_pcidev(struct acrn_vm *vm, uint16_t vmid, uint64_t param)
{
int32_t ret = -EINVAL;
struct acrn_assign_pcidev pcidev;
struct acrn_vm *target_vm = get_vm_from_vmid(vmid);
if (!is_poweroff_vm(target_vm) && is_postlaunched_vm(target_vm)) {
if (copy_from_gpa(vm, &pcidev, param, sizeof(pcidev)) != 0) {
pr_err("%s: Unable copy param to vm\n", __func__);
} else {
ret = vpci_assign_pcidev(target_vm, &pcidev);
}
} else {
pr_err("%s, vm[%d] is invalid\n", __func__, vm->vm_id);
}
return ret;
}
/**
* @brief Deassign one PCI dev from a VM.
*
* @param vm Pointer to VM data structure
* @param vmid ID of the VM
* @param param guest physical address. This gpa points to data structure of
* acrn_assign_pcidev including deassign PCI device info
*
* @pre Pointer vm shall point to SOS_VM
* @return 0 on success, non-zero on error.
*/
int32_t hcall_deassign_pcidev(struct acrn_vm *vm, uint16_t vmid, uint64_t param)
{
int32_t ret = -EINVAL;
struct acrn_assign_pcidev pcidev;
struct acrn_vm *target_vm = get_vm_from_vmid(vmid);
if (!is_poweroff_vm(target_vm) && is_postlaunched_vm(target_vm)) {
if (copy_from_gpa(vm, &pcidev, param, sizeof(pcidev)) != 0) {
pr_err("%s: Unable copy param to vm\n", __func__);
} else {
ret = vpci_deassign_pcidev(target_vm, &pcidev);
}
} else {
pr_err("%s, vm[%d] is invalid\n", __func__, vm->vm_id);
}
return ret;
}
/**
* @brief Set interrupt mapping info of ptdev.
*