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Commit 83c3a331 authored by Xudong Hao's avatar Xudong Hao Committed by Avi Kivity
Browse files

KVM: VMX: Add parameter to control A/D bits support, default is on 



Add kernel parameter to control A/D bits support, it's on by default.

Signed-off-by: default avatarHaitao Shan <haitao.shan@intel.com>
Signed-off-by: default avatarXudong Hao <xudong.hao@intel.com>
Signed-off-by: default avatarAvi Kivity <avi@redhat.com>
parent aaf07bc2

arch/x86/kvm/vmx.c

+12 −0
Original line number Diff line number Diff line
@@ -71,6 +71,9 @@ static bool __read_mostly enable_unrestricted_guest = 1; 
module_param_named(unrestricted_guest,

			enable_unrestricted_guest, bool, S_IRUGO);



static bool __read_mostly enable_ept_ad_bits = 1;

module_param_named(eptad, enable_ept_ad_bits, bool, S_IRUGO);



static bool __read_mostly emulate_invalid_guest_state = 0;

module_param(emulate_invalid_guest_state, bool, S_IRUGO);
@@ -789,6 +792,11 @@ static inline bool cpu_has_vmx_ept_4levels(void) 
	return vmx_capability.ept & VMX_EPT_PAGE_WALK_4_BIT;

}



static inline bool cpu_has_vmx_ept_ad_bits(void)

{

	return vmx_capability.ept & VMX_EPT_AD_BIT;

}



static inline bool cpu_has_vmx_invept_individual_addr(void)

{

	return vmx_capability.ept & VMX_EPT_EXTENT_INDIVIDUAL_BIT;
@@ -2645,8 +2653,12 @@ static __init int hardware_setup(void) 
	    !cpu_has_vmx_ept_4levels()) {

		enable_ept = 0;

		enable_unrestricted_guest = 0;

		enable_ept_ad_bits = 0;

	}



	if (!cpu_has_vmx_ept_ad_bits())

		enable_ept_ad_bits = 0;



	if (!cpu_has_vmx_unrestricted_guest())

		enable_unrestricted_guest = 0;