Jie Deng 47e193a7bb hv: Add split-lock emulation for LOCK prefix instruction ...

This patch adds the split-lock emulation.
If a #AC is caused by instruction with LOCK prefix then
emulate it, otherwise, inject it back as it used to be.

 1. Kick other vcpus of the guest to stop execution
    and set the TF flag to have #DB if the guest has more
    than one vcpu.

 2. Skip over the LOCK prefix and resume the current
    vcpu back to guest for execution.

 3. Notify other vcpus to restart exception at the end
    of handling the #DB since we have completed
    the LOCK prefix instruction emulation.

Tracked-On: #5605
Signed-off-by: Jie Deng <jie.deng@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>

2020-12-31 11:12:33 +08:00

9.2 KiB

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