We only support 4 levels EPT pagetable now.
Signed-off-by: Sheng Yang <sheng@xxxxxxxxxxxxxxx>
---
arch/x86/kvm/vmx.c | 8 +++++++-
1 files changed, 7 insertions(+), 1 deletions(-)
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 99ae513..d400fbb 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -339,6 +339,11 @@ 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;
@@ -1567,7 +1572,8 @@ 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;
}
--
1.7.0.1
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