Re: [PATCH 01/43] KVM: nVMX: Set LDTR to its architecturally defined value on nested VM-Exit
From: Reiji Watanabe <hidden>
Date: 2021-05-19 05:30:44
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On Fri, Apr 23, 2021 at 5:47 PM Sean Christopherson [off-list ref] 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@google.com>Reviewed-by: Reiji Watanabe <redacted>