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| author |   Sheng Yang <sheng@linux.intel.com> | 2010-06-02 14:05:24 +0800 |
|---|---|---|
| committer |   Avi Kivity <avi@redhat.com> | 2010-08-01 10:39:25 +0300 |
| commit | 4bc9b9828150747386130ab172f7e868e1a0fc2a (patch) | |
| tree | 1d0bdff256c67255fa4e80c29e8c001e434f3ad9 /arch | |
| parent | KVM: Add Documentation/kvm/msr.txt (diff) | |
| download | linux-dev-4bc9b9828150747386130ab172f7e868e1a0fc2a.tar.xz linux-dev-4bc9b9828150747386130ab172f7e868e1a0fc2a.zip | |
KVM: VMX: Enforce EPT pagetable level checking
We only support 4 levels EPT pagetable now.
Signed-off-by: Sheng Yang <sheng@linux.intel.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | 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 8c9085d44c37..2201e3816205 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -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; } |