Shuo A Liu ea849177a5 hv: fix interrupt lost when do acrn_handle_pending_request twice ...

One cycle of vmexit/vmentry might lost interrupts.
This is the scenario,
  1) vmexit, vmexit_handlers
  2) softirq & disable interrupt
  3) acrn_handle_pending_request
  4) schedule if needed, then back to 1) and loop again.
  5) vmentry

The step 3) might be executed twice. The problem is at the second
execution of acrn_handle_pending_request, we might overwrite
VMX_ENTRY_INT_INFO_FIELD of current vmcs, which cause guest lost
interrupts.

The fix is moving 4) prior to 3), then we will handle the pending
requests and vmentry directly.

Tracked-On: #3374
Signed-off-by: Shuo A Liu <shuo.a.liu@intel.com>
Reviewed-by: Jason Chen CJ <jason.cj.chen@intel.com>

2019-07-09 09:23:12 +08:00

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