Shuo A Liu 3110e70d0a hv: nested: INVEPT emulation supports shadow EPT ...

L1 VM changes the guest EPT and do INVEPT to invalidate the previous
TLB cache of EPT entries. The shadow EPT replies on INVEPT instruction
to do the update.

The target shadow EPTs can be found according to the 'type' of INVEPT.
Here are two types and their target shadow EPT,
  1) Single-context invalidation
     Get the EPTP from the INVEPT descriptor. Then find the target
     shadow EPT.
  2) Global invalidation
     All shadow EPTs of the L1 VM.

The INVEPT emulation handler invalidate all the EPT entries of the
target shadow EPTs.

Tracked-On: #5923
Signed-off-by: Sainath Grandhi <sainath.grandhi@intel.com>
Signed-off-by: Zide Chen <zide.chen@intel.com>
Signed-off-by: Shuo A Liu <shuo.a.liu@intel.com>
Reviewed-by: Jason Chen CJ <jason.cj.chen@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>

2021-06-04 13:53:47 +08:00

..

x86

hv: nested: INVEPT emulation supports shadow EPT

2021-06-04 13:53:47 +08:00