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Commit 4bc9b982 authored by Sheng Yang's avatar Sheng Yang Committed by Avi Kivity
Browse files

KVM: VMX: Enforce EPT pagetable level checking 



We only support 4 levels EPT pagetable now.

Signed-off-by: default avatarSheng Yang <sheng@linux.intel.com>
Signed-off-by: default avatarMarcelo Tosatti <mtosatti@redhat.com>
parent d2d7a611

arch/x86/kvm/vmx.c

+7 −1
Original line number Diff line number Diff line
@@ -340,6 +340,11 @@ static inline bool cpu_has_vmx_ept_1g_page(void) 
	return vmx_capability.ept & VMX_EPT_1GB_PAGE_BIT;

}



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_invept_individual_addr(void)

{

	return vmx_capability.ept & VMX_EPT_EXTENT_INDIVIDUAL_BIT;
@@ -1568,7 +1573,8 @@ static __init int hardware_setup(void) 
	if (!cpu_has_vmx_vpid())

		enable_vpid = 0;



	if (!cpu_has_vmx_ept()) {

	if (!cpu_has_vmx_ept() ||

	    !cpu_has_vmx_ept_4levels()) {

		enable_ept = 0;

		enable_unrestricted_guest = 0;

	}