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hv: pm: avoid duplicate shutdowns on RTVM

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It is possible for more than one vCPUs to trigger shutdown on an RTVM.
We need to avoid entering VM_READY_TO_POWEROFF state again after the
RTVM has been paused or shut down.

Also, make sure an RTVM enters VM_READY_TO_POWEROFF state before it can
be paused.

v1 -> v2:
- rename to poweroff_if_rt_vm for better clarity

Tracked-On: #5411
Signed-off-by: Peter Fang <peter.fang@intel.com>
This commit is contained in:
Peter Fang
2020-11-05 17:40:54 -08:00
committed by wenlingz
parent e6ca39406a
commit 68dc8d9f8f
4 changed files with 18 additions and 10 deletions
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hypervisor/include/arch/x86/guest/vm.h
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@@ -214,6 +214,7 @@ static inline uint16_t vmid_2_rel_vmid(uint16_t sos_vmid, uint16_t vmid) {
void make_shutdown_vm_request(uint16_t pcpu_id);
bool need_shutdown_vm(uint16_t pcpu_id);
int32_t shutdown_vm(struct acrn_vm *vm);
void poweroff_if_rt_vm(struct acrn_vm *vm);
void pause_vm(struct acrn_vm *vm);
void resume_vm_from_s3(struct acrn_vm *vm, uint32_t wakeup_vec);
void start_vm(struct acrn_vm *vm);