Re: [PATCH 01/22] KVM: TDX/VMX: rework EPT_VIOLATION_EXEC_FOR_RING3_LIN into PROT_MASK

["Huang, Kai" <kai.huang@intel.com>]

On Sat, 2026-03-21 at 01:09 +0100, Paolo Bonzini wrote:
> From: Jon Kohler <jon@nutanix.com>
> 
> EPT exit qualification bit 6 is used when mode-based execute control
> is enabled, and reflects user executable addresses. Rework name to
> reflect the intention and add to EPT_VIOLATION_PROT_MASK, which allows
> simplifying the return evaluation in
> tdx_is_sept_violation_unexpected_pending a pinch.
> 
> Rework handling in __vmx_handle_ept_violation to unconditionally clear
> EPT_VIOLATION_PROT_USER_EXEC until MBEC is implemented, as suggested by
> Sean [1].
> 
> Note: Intel SDM Table 29-7 defines bit 6 as:
>   If the “mode-based execute control” VM-execution control is 0, the
>   value of this bit is undefined. If that control is 1, this bit is the
>   logical-AND of bit 10 in the EPT paging-structure entries used to
>   translate the guest-physical address of the access causing the EPT
>   violation. In this case, it indicates whether the guest-physical
>   address was executable for user-mode linear addresses.
> 
> [1] https://lore.kernel.org/all/aCJDzU1p_SFNRIJd@google.com/
> 
> Suggested-by: Sean Christopherson <seanjc@google.com>
> Signed-off-by: Jon Kohler <jon@nutanix.com>
> Message-ID: <20251223054806.1611168-2-jon@nutanix.com>
> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
> 

Acked-by: Kai Huang <kai.huang@intel.com>