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hv: Add stateful VM check before system shutdown

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This patch introduces stateful VM which represents a VM that has its own
internal state such as a file cache, and adds a check before system
shutdown to make sure that stateless VM does not block system shutdown.

Tracked-On: #6571
Signed-off-by: Wang Yu <yu1.wang@intel.com>
Signed-off-by: Yifan Liu <yifan1.liu@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
This commit is contained in:
Yifan Liu 2021-11-30 04:42:13 +00:00 committed by wenlingz
parent 71da1bed9b
commit 0d59577fe4
2 changed files with 18 additions and 1 deletions
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18
hypervisor/arch/x86/guest/vm.c
View File

@ -156,6 +156,22 @@ bool is_rt_vm(const struct acrn_vm *vm)
return ((vm_config->guest_flags & GUEST_FLAG_RT) != 0U);
}
/**
* @pre vm != NULL && vm_config != NULL && vm->vmid < CONFIG_MAX_VM_NUM
*
* Stateful VM refers to VM that has its own state (such as internal file cache),
* and will experience state loss (file system corruption) if force powered down.
*/
bool is_stateful_vm(const struct acrn_vm *vm)
{
struct acrn_vm_config *vm_config = get_vm_config(vm->vm_id);
/* TEE VM doesn't has its own state. The TAs will do the content
* flush by themselves, HV and OS doesn't need to care about the state.
*/
return ((vm_config->guest_flags & GUEST_FLAG_TEE) == 0U);
}
/**
* @pre vm != NULL && vm_config != NULL && vm->vmid < CONFIG_MAX_VM_NUM
*/
@ -751,7 +767,7 @@ static bool is_ready_for_system_shutdown(void)
for (vm_id = 0U; vm_id < CONFIG_MAX_VM_NUM; vm_id++) {
vm = get_vm_from_vmid(vm_id);
/* TODO: Update code to cover hybrid mode */
if (!is_poweroff_vm(vm)) {
if (!is_poweroff_vm(vm) && is_stateful_vm(vm)) {
ret = false;
break;
}

1
hypervisor/include/arch/x86/asm/guest/vm.h
View File

@ -256,6 +256,7 @@ void vrtc_init(struct acrn_vm *vm);
bool is_lapic_pt_configured(const struct acrn_vm *vm);
bool is_rt_vm(const struct acrn_vm *vm);
bool is_stateful_vm(const struct acrn_vm *vm);
bool is_nvmx_configured(const struct acrn_vm *vm);
bool is_vcat_configured(const struct acrn_vm *vm);
bool is_static_configured_vm(const struct acrn_vm *vm);