Re: [PATCH 01/43] KVM: nVMX: Set LDTR to its architecturally defined value on nested VM-Exit

[Reiji Watanabe]

On Fri, Apr 23, 2021 at 5:47 PM Sean Christopherson <seanjc@xxxxxxxxxx> wrote:
>
> Set L1's LDTR on VM-Exit per the Intel SDM:
>
>   The host-state area does not contain a selector field for LDTR. LDTR is
>   established as follows on all VM exits: the selector is cleared to
>   0000H, the segment is marked unusable and is otherwise undefined
>   (although the base address is always canonical).
>
> This is likely a benign bug since the LDTR is unusable, as it means the
> L1 VMM is conditioned to reload its LDTR in order to function properly on
> bare metal.
>
> Fixes: 4704d0befb07 ("KVM: nVMX: Exiting from L2 to L1")
> Signed-off-by: Sean Christopherson <seanjc@xxxxxxxxxx>

Reviewed-by: Reiji Watanabe <reijiw@xxxxxxxxxx>