Re: [RFC PATCH v6 76/92] kvm: x86: disable EPT A/D bits if introspection is present

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On 09/08/19 18:00, Adalbert Lazăr wrote:
> Signed-off-by: Adalbert Lazăr <alazar@xxxxxxxxxxxxxxx>
> ---
>  arch/x86/kvm/vmx/vmx.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
> index dc648ba47df3..152c58b63f69 100644
> --- a/arch/x86/kvm/vmx/vmx.c
> +++ b/arch/x86/kvm/vmx/vmx.c
> @@ -7718,7 +7718,7 @@ static __init int hardware_setup(void)
>  	    !cpu_has_vmx_invept_global())
>  		enable_ept = 0;
>  
> -	if (!cpu_has_vmx_ept_ad_bits() || !enable_ept)
> +	if (!cpu_has_vmx_ept_ad_bits() || !enable_ept || kvmi_is_present())
>  		enable_ept_ad_bits = 0;
>  
>  	if (!cpu_has_vmx_unrestricted_guest() || !enable_ept)
> 

Why?

Paolo



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